Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

140 files changed, 21568 insertions, 0 deletions

diff --git a/src/libs/xpcom18a4/ipc/ipcd/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/Makefile.in
new file mode 100644
index 00000000..d5f24007
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/Makefile.in
@@ -0,0 +1,64 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+
+PACKAGE_FILE = ipc.pkg
+
+DIRS		= \
+			util \
+			shared/src \
+			daemon/public \
+			client/public \
+			extensions \
+			client/src \
+			daemon/src \
+			$(NULL)
+
+ifdef ENABLE_TESTS
+DIRS		+= test
+endif
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/Makefile.kup b/src/libs/xpcom18a4/ipc/ipcd/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/Makefile.kup
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/Makefile.kup b/src/libs/xpcom18a4/ipc/ipcd/client/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/Makefile.kup
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/client/public/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/client/public/Makefile.in
new file mode 100644
index 00000000..896e68b8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/Makefile.in
@@ -0,0 +1,59 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+
+EXPORTS		= \
+			ipcdclient.h \
+			ipcCID.h \
+			$(NULL)
+
+XPIDLSRCS	= \
+			ipcIService.idl \
+			ipcIMessageObserver.idl \
+			ipcIClientObserver.idl \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcCID.h b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcCID.h
new file mode 100644
index 00000000..4863ff0d
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcCID.h
@@ -0,0 +1,53 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcCID_h__
+#define ipcCID_h__
+
+#define IPC_SERVICE_CLASSNAME \
+    "ipcService"
+#define IPC_SERVICE_CONTRACTID \
+    "@mozilla.org/ipc/service;1"
+#define IPC_SERVICE_CID                              \
+{ /* 9f12676a-5168-4a08-beb8-edf8a593a1ca */         \
+    0x9f12676a,                                      \
+    0x5168,                                          \
+    0x4a08,                                          \
+    {0xbe, 0xb8, 0xed, 0xf8, 0xa5, 0x93, 0xa1, 0xca} \
+}
+
+#endif // !ipcCID_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIClientObserver.idl b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIClientObserver.idl
new file mode 100644
index 00000000..c72d0909
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIClientObserver.idl
@@ -0,0 +1,51 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsISupports.idl"
+
+/**
+ * ipcIClientObserver
+ */
+[scriptable, uuid(42283079-030c-4b13-b069-a08b7ad5eab2)]
+interface ipcIClientObserver : nsISupports
+{
+    const unsigned long CLIENT_UP   = 1;
+    const unsigned long CLIENT_DOWN = 2;
+    
+    void onClientStateChange(in unsigned long aClientID,
+                             in unsigned long aClientState);
+};
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIMessageObserver.idl b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIMessageObserver.idl
new file mode 100644
index 00000000..db24b1f2
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIMessageObserver.idl
@@ -0,0 +1,64 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsISupports.idl"
+
+/**
+ * ipcIMessageObserver
+ */
+[scriptable, uuid(e40a4a3c-2dc1-470e-ab7f-5675fe1f1384)]
+interface ipcIMessageObserver : nsISupports
+{
+    /**
+     * @param aSenderID
+     *        the client id of the sender of this message.  if sent by the
+     *        daemon (or a deamon module), then this will have a value of 0.
+     * @param aTarget
+     *        the target of the message, corresponding to the target this
+     *        observer was registered under.  this parameter is passed to allow
+     *        an observer instance to receive messages for more than one target.
+     * @param aData
+     *        the data of the message.
+     * @param aDataLen
+     *        the data length of the message.
+     */
+    void onMessageAvailable(in unsigned long aSenderID,
+                            in nsIDRef       aTarget,
+                           [array, const, size_is(aDataLen)]
+                            in octet         aData,
+                            in unsigned long aDataLen);
+};
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIService.idl b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIService.idl
new file mode 100644
index 00000000..671b557d
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcIService.idl
@@ -0,0 +1,228 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsISupports.idl"
+
+interface ipcIMessageObserver;
+interface ipcIClientObserver;
+
+/**
+ * ipcIService
+ *
+ * the IPC service provides the means to communicate with an external IPC
+ * daemon and/or other mozilla-based applications on the same physical system.
+ * the IPC daemon hosts modules (some builtin and others dynamically loaded)
+ * with which applications may interact.
+ *
+ * at application startup, the IPC service will attempt to establish a
+ * connection with the IPC daemon.  the IPC daemon will be automatically
+ * started if necessary.  when a connection has been established, the IPC
+ * service will enumerate the "ipc-startup-category" and broadcast an
+ * "ipc-startup" notification using the observer service.
+ *
+ * when the connection to the IPC daemon is closed, an "ipc-shutdown"
+ * notification will be broadcast.
+ *
+ * each client has a name.  the client name need not be unique across all
+ * clients, but it is usually good if it is.  the IPC service does not require
+ * unique names.  instead, the IPC daemon assigns each client a unique ID that
+ * is good for the current "session."  clients can query other clients by name
+ * or by ID.  the IPC service supports forwarding messages from one client to
+ * another via the IPC daemon.
+ *
+ * for performance reasons, this system should not be used to transfer large
+ * amounts of data.  instead, applications may choose to utilize shared memory,
+ * and rely on the IPC service for synchronization and small message transfer
+ * only.
+ */
+[scriptable, uuid(53d3e3a7-528f-4b09-9eab-9416272568c0)]
+interface ipcIService : nsISupports
+{
+    /**************************************************************************
+     * properties of this process
+     */
+
+    /**
+     * returns the "client ID" assigned to this process by the IPC daemon.
+     *
+     * @throws NS_ERROR_NOT_AVAILABLE if no connection to the IPC daemon.
+     */
+    readonly attribute unsigned long ID;
+
+    /**
+     * this process can appear under several client names.  use the following
+     * methods to add or remove names for this process.
+     *
+     * for example, the mozilla browser might have the primary name "mozilla",
+     * but it could also register itself under the names "browser", "mail",
+     * "news", "addrbook", etc.  other IPC clients can then query the IPC
+     * daemon for the client named "mail" in order to talk with a mail program.
+     *
+     * XXX An IPC client name resembles a XPCOM contract ID.
+     */
+    void addName(in string aName);
+    void removeName(in string aName);
+
+    /**
+     * add a new observer of client status change notifications.
+     */
+    void addClientObserver(in ipcIClientObserver aObserver);
+
+    /**
+     * remove an observer of client status change notifications.
+     */
+    void removeClientObserver(in ipcIClientObserver aObserver);
+
+    /**************************************************************************
+     * client query methods
+     */
+
+    /**
+     * resolve the given client name to the id of a connected client.  this
+     * involves a round trip to the daemon, and as a result the calling thread
+     * may block on this function call while waiting for the daemon to respond.
+     */
+    unsigned long resolveClientName(in string aName);
+
+
+    /**
+     * tests whether a particular client is connected to the IPC daemon.
+     */
+    boolean clientExists(in unsigned long aClientID);
+
+
+    // XXX need other functions to enumerate clients, clients implementing targets, etc.
+    // enumerator getClients();
+    // enumerator getClientsSupportingTarget(in nsIDRef aTarget);
+    // enumerator getClientNames(in unsigned long aClientID);
+    // enumerator getClientTargets(in unsigned long aClientID);
+
+
+    /**************************************************************************
+     * message methods
+     */
+
+    /**
+     * set a message observer for a particular message target.
+     *
+     * @param aTarget
+     *        the message target being observed.  any existing observer will
+     *        be replaced.
+     * @param aObserver
+     *        the message observer to receive incoming messages for the
+     *        specified target.  pass null to remove the existing observer.
+     * @param aOnCurrentThread
+     *        if true, then the message observer will be called on the same
+     *        thread that calls defineTarget.  otherwise, aObserver will be
+     *        called on a background thread.
+     */
+    void defineTarget(in nsIDRef             aTarget,
+                      in ipcIMessageObserver aObserver,
+                      in boolean             aOnCurrentThread);
+
+    /**
+     * send message asynchronously to a client or a module in the IPC daemon.
+     * there is no guarantee that the message will be delivered.
+     *
+     * @param aClientID
+     *        the client ID of the foreign application that should receive this
+     *        message.  pass 0 to send a message to a module in the IPC daemon.
+     * @param aTarget
+     *        the target of the message.  if aClientID is 0, then this is the
+     *        ID of the daemon module that should receive this message.
+     * @param aData
+     *        the message data.
+     * @param aDataLen
+     *        the message length.
+     */
+    void sendMessage(in unsigned long aReceiverID,
+                     in nsIDRef       aTarget,
+                    [array, const, size_is(aDataLen)]
+                     in octet         aData,
+                     in unsigned long aDataLen);
+
+    /**
+     * block the calling thread until a matching message is received.
+     *
+     * @param aSenderID
+     *        pass 0 to wait for a message from the daemon.  pass PR_UINT32_MAX
+     *        to wait for a message from any source.  otherwise, pass a client
+     *        id to wait for a message from that particular client.
+     * @param aTarget
+     *        wait for a message to be delivered to this target.
+     * @param aObserver
+     *        this observer's OnMessageAvailable method is called when a
+     *        matching message is available.  pass null to use the default
+     *        observer associated with aTarget.
+     * @param aTimeout
+     *        indicates maximum length of time in milliseconds that this
+     *        function may block the calling thread.
+     *
+     * @throws IPC_ERROR_WOULD_BLOCK if the timeout expires.
+     *
+     * the observer's OnMessageAvailable method may throw IPC_WAIT_NEXT_MESSAGE
+     * to indicate that it does not wish to handle the message that it was
+     * given, and that it will wait to be called with the next message.  this
+     * enables the observer to keep messages in the queue that do not match the
+     * desired message.  messages that remain in the queue will be dispatched
+     * asynchronously to the default message handler after waitMessage finishes.
+     *
+     * NOTE: this function may hang the calling thread until a matching message
+     * is received, so use it with caution.
+     */
+    void waitMessage(in unsigned long       aSenderID,
+                     in nsIDRef             aTarget,
+                     in ipcIMessageObserver aObserver,
+                     in unsigned long       aTimeout);
+
+    /**
+     * Call this method to disable the default message observer for a target.
+     */
+    void disableMessageObserver(in nsIDRef aTarget);
+
+    /**
+     * Call this method to re-enable the default message observer for a target.
+     */
+    void enableMessageObserver(in nsIDRef aTarget);
+};
+
+%{C++
+// category and observer event defines (XXX not yet implemented)
+#define IPC_SERVICE_STARTUP_CATEGORY "ipc-startup-category"
+#define IPC_SERVICE_STARTUP_TOPIC    "ipc-startup"
+#define IPC_SERVICE_SHUTDOWN_TOPIC   "ipc-shutdown"
+%}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcdclient.h b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcdclient.h
new file mode 100644
index 00000000..5cbed879
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/public/ipcdclient.h
@@ -0,0 +1,326 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcdclient_h__
+#define ipcdclient_h__
+
+/*****************************************************************************
+ * This file provides a client-side API to the IPC daemon.
+ *
+ * This API can be used to communicate with other clients of the IPC daemon
+ * as well as modules running inside the IPC daemon.
+ *
+ * This API is meant to be used only on the application's main thread.  It is
+ * assumed that callbacks can be dispatched via the main thread's event queue.
+ */
+
+#include "nscore.h"
+#include "nsID.h"
+#include "nsError.h"
+#include "ipcIMessageObserver.h"
+#include "ipcIClientObserver.h"
+
+/* This API is only provided for the extensions compiled into the IPCDC
+ * library, hence this API is hidden in the final DSO. */
+#define IPC_METHOD NS_HIDDEN_(nsresult)
+
+/* This value can be used to represent the client id of any client connected
+ * to the IPC daemon. */
+#define IPC_SENDER_ANY PR_UINT32_MAX
+
+/* This error code can only be returned by OnMessageAvailable, when called by
+ * IPC_WaitMessage.  See IPC_WaitMessage for a description of how this error
+ * code may be used. */
+#define IPC_WAIT_NEXT_MESSAGE \
+  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_GENERAL, 10)
+
+#ifdef VBOX
+/* This error code can only be returned by the selector functions called by
+ * WaitTarget. The message should be dropped without processing. */
+#define IPC_DISCARD_MESSAGE \
+  NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_GENERAL, 12)
+#endif /* VBOX */
+
+/* This error code is returned by IPC_WaitMessage under certain conditions. */
+#define IPC_ERROR_WOULD_BLOCK NS_BASE_STREAM_WOULD_BLOCK
+
+/*****************************************************************************
+ * Initialization and Shutdown
+ */
+
+// XXX limit these to the main thread, and call them from our module's ctor/dtor?
+
+/**
+ * Connects this process to the IPC daemon and initializes it for use as a
+ * client of the IPC daemon.  This function must be called once before any
+ * other methods defined in this file can be used.
+ *
+ * @returns NS_ERROR_ALREADY_INITIALIZED if IPC_Shutdown was not called since
+ * the last time IPC_Init was called.
+ */
+IPC_METHOD IPC_Init();
+
+/**
+ * Disconnects this process from the IPC daemon.  After this function is
+ * called, no other methods in this file except for IPC_Init may be called.
+ *
+ * This function calls all client observers (registered with
+ * IPC_AddClientObserver) before it actually disconnects from the IPC daemon,
+ * with aClientID parameter of the OnClientStateChange callback specially
+ * set to IPC_SENDER_ANY and aClientState set to CLIENT_DOWN. This gives
+ * the interested party an opportunity to perform a proper shutdown procedure.
+ * All IPC methods are still available inside OnClientStateChange call except
+ * the IPC_WaitMessage function, that will immediately fail with an error.
+ * OnClientStateChange is called on the same thread where this function is
+ * called.
+ *
+ * @returns NS_ERROR_NOT_INITIALIZED if IPC_Init has not been called or if
+ * IPC_Init did not return a success code.
+ */
+IPC_METHOD IPC_Shutdown();
+
+
+/*****************************************************************************
+ * The core messaging API
+ */
+
+/**
+ * Call this method to define a message target.  A message target is defined
+ * by a UUID and a message observer.  This observer is notified asynchronously
+ * whenever a message is sent to this target in this process.
+ *
+ * This function has three main effects:
+ *  o  If the message target is already defined, then this function simply
+ *     resets its message observer.
+ *  o  If the message target is not already defined, then the message target
+ *     is defined and the IPC daemon is notified of the existance of this
+ *     message target.
+ *  o  If null is passed for the message observer, then the message target is
+ *     removed, and the daemon is notified of the removal of this message target.
+ *
+ * If aOnCurrentThread is true, then notifications to the observer will occur
+ * on the current thread.  This means that there must be a nsIEventTarget
+ * associated with the calling thread.  If aOnCurrentThread is false, then
+ * notifications to the observer will occur on a background thread.  In which
+ * case, the observer must be threadsafe.
+ */
+IPC_METHOD IPC_DefineTarget(
+  const nsID          &aTarget,
+  ipcIMessageObserver *aObserver,
+  PRBool               aOnCurrentThread = PR_TRUE
+);
+
+/**
+ * Call this method to temporarily disable the message observer configured
+ * for a message target.
+ */
+IPC_METHOD IPC_DisableMessageObserver(
+  const nsID          &aTarget
+);
+
+/**
+ * Call this method to re-enable the message observer configured for a
+ * message target.
+ */
+IPC_METHOD IPC_EnableMessageObserver(
+  const nsID          &aTarget
+);
+
+/**
+ * This function sends a message to the IPC daemon asynchronously.  If
+ * aReceiverID is non-zero, then the message is forwarded to the client
+ * corresponding to that identifier.
+ *
+ * If there is no client corresponding to aRecieverID, then the IPC daemon will
+ * simply drop the message.
+ */
+IPC_METHOD IPC_SendMessage(
+  PRUint32             aReceiverID,
+  const nsID          &aTarget,
+  const PRUint8       *aData,
+  PRUint32             aDataLen
+);
+
+/**
+ * This function blocks the calling thread until a message for the given target
+ * is received (optionally from the specified client).
+ *
+ * The aSenderID parameter is interpreted as follows:
+ *  o  If aSenderID is 0, then this function waits for a message to be sent by
+ *     the IPC daemon.
+ *  o  If aSenderID is IPC_SENDER_ANY, then this function waits for a message
+ *     to be sent from any source.
+ *  o  Otherwise, this function waits for a message to be sent by the client
+ *     with ID given by aSenderID.  If aSenderID does not identify a valid
+ *     client, or if the client dies while waiting, then this function will
+ *     return an error.
+ *
+ * The aObserver parameter is interpreted as follows:
+ *  o  If aObserver is null, then the default message observer for the target
+ *     is invoked when the next message is received.
+ *  o  Otherwise, aObserver will be inovked when the next message is received.
+ *
+ * The aConsumer parameter is interpreted as follows:
+ *  o  If aObserver is null or aConsumer is null, this parameter is ignored.
+ *  o  Otherwise, aConsumer will be invoked right after (and only if) aObserver
+ *     has accepted some message. It will receive exactly the same message
+ *     that was accepted by aObserver.
+ *
+ * The aTimeout parameter is interpreted as follows:
+ *  o  If aTimeout is PR_INTERVAL_NO_TIMEOUT, then this function will block
+ *     until a matching message is received.
+ *  o  If aTimeout is PR_INTERVAL_NO_WAIT, then this function will only inspect
+ *     the current queue of messages.  If no matching message is found, then
+ *     IPC_ERROR_WOULD_BLOCK is returned.
+ *  o  Otherwise, aTimeout specifies the maximum amount of time to wait for a
+ *     matching message to be received.  If no matching message is found after
+ *     the timeout expires, then IPC_ERROR_WOULD_BLOCK is returned.
+ *
+ * If aObserver's OnMessageAvailable function returns IPC_WAIT_NEXT_MESSAGE,
+ * then the function will continue blocking until the next matching message
+ * is received.  Bypassed messages will be dispatched to the default message
+ * observer when the event queue, associated with the thread that called
+ * IPC_DefineTarget, is processed.
+ *
+ * There is a special case if aSenderID is IPC_SENDER_ANY and one of IPC clients
+ * dies while this function waits for a message. In this case, aObserver's
+ * OnMessageAvailable function is called with a special set of arguments:
+ * dead client id, empty target id and null message (both data and data length
+ * are zeroes). If it returns IPC_WAIT_NEXT_MESSAGE, IPC_WaitMessage continues
+ * blocking as usual, otherwise an error is immediately returned to the caller.
+ *
+ * aObserver is not expected to use any IPC system functons from within its
+ * OnMessageAvailable implementation. This is because the IPC system is not
+ * re-entrant during invocation of OnMessageAvailable function, and making other
+ * IPC calls can lead to unexpected results (like message losses or traps). On
+ * the contrary, aConsumer's OnMessageAvailable function is allowed to use the
+ * IPC system without any limitations.
+ *
+ * This function runs the risk of hanging the calling thread indefinitely if
+ * no matching message is ever received.
+ */
+IPC_METHOD IPC_WaitMessage(
+  PRUint32             aSenderID,
+  const nsID          &aTarget,
+  ipcIMessageObserver *aObserver = nsnull,
+  ipcIMessageObserver *aConsumer = nsnull,
+  PRIntervalTime       aTimeout = PR_INTERVAL_NO_TIMEOUT
+);
+
+/*****************************************************************************/
+
+/**
+ * Returns the "ClientID" of the current process.
+ */
+IPC_METHOD IPC_GetID(
+  PRUint32 *aClientID
+);
+
+/**
+ * Adds a new name for the current process.  The IPC daemon is notified of this
+ * change, which allows other processes to discover this process by the given
+ * name.
+ */
+IPC_METHOD IPC_AddName(
+  const char *aName
+);
+
+/**
+ * Removes a name associated with the current process.
+ */
+IPC_METHOD IPC_RemoveName(
+  const char *aName
+);
+
+/**
+ * Adds client observer.  Will be called on the main thread.
+ */
+IPC_METHOD IPC_AddClientObserver(
+  ipcIClientObserver *aObserver
+);
+
+/**
+ * Removes client observer.
+ */
+IPC_METHOD IPC_RemoveClientObserver(
+  ipcIClientObserver *aObserver
+);
+
+/**
+ * Resolves the given client name to a client ID of a process connected to
+ * the IPC daemon.
+ */
+IPC_METHOD IPC_ResolveClientName(
+  const char *aName,
+  PRUint32   *aClientID
+);
+
+/**
+ * Tests whether the client is connected to the IPC daemon.
+ */
+IPC_METHOD IPC_ClientExists(
+  PRUint32  aClientID,
+  PRBool   *aResult
+);
+
+/*****************************************************************************/
+
+/**
+ * This class can be used to temporarily disable the default message observer
+ * defined for a particular message target.
+ */
+class ipcDisableMessageObserverForScope
+{
+public:
+  ipcDisableMessageObserverForScope(const nsID &aTarget)
+    : mTarget(aTarget)
+  {
+    IPC_DisableMessageObserver(mTarget);
+  }
+
+  ~ipcDisableMessageObserverForScope()
+  {
+    IPC_EnableMessageObserver(mTarget);
+  }
+
+private:
+  const nsID &mTarget;
+};
+
+#define IPC_DISABLE_MESSAGE_OBSERVER_FOR_SCOPE(_t) \
+  ipcDisableMessageObserverForScope ipc_dmo_for_scope##_t(_t)
+
+#endif /* ipcdclient_h__ */
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/client/src/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/client/src/Makefile.in
new file mode 100644
index 00000000..b2854e35
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/Makefile.in
@@ -0,0 +1,101 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE			= ipcd
+LIBRARY_NAME	= ipcdc
+EXPORT_LIBRARY	= 1
+IS_COMPONENT	= 1
+MODULE_NAME		= ipcdclient
+
+REQUIRES	= \
+            xpcom \
+            string \
+            $(NULL)
+
+CPPSRCS		= \
+            ipcdclient.cpp \
+            ipcService.cpp \
+            ipcModuleFactory.cpp \
+            $(NULL)
+
+ifeq ($(OS_ARCH),WINNT)
+CPPSRCS +=  ipcConnectionWin.cpp
+else
+ifeq ($(OS_ARCH),BeOS)
+CPPSRCS +=  ipcConnectionStub.cpp
+else
+CPPSRCS +=  ipcConnectionUnix.cpp
+endif
+endif
+
+LOCAL_INCLUDES = \
+            -I$(srcdir)/../../shared/src \
+            -I$(srcdir)/../../extensions/lock/src \
+            -I$(srcdir)/../../extensions/transmngr/src \
+            -I$(srcdir)/../../extensions/transmngr/common \
+            $(NULL)
+
+SHARED_LIBRARY_LIBS = \
+			$(DIST)/lib/$(LIB_PREFIX)ipcdshared_s.$(LIB_SUFFIX) \
+			$(DIST)/lib/$(LIB_PREFIX)ipcdlock_s.$(LIB_SUFFIX) \
+			$(DIST)/lib/$(LIB_PREFIX)transmgr_s.$(LIB_SUFFIX) \
+			$(DIST)/lib/$(LIB_PREFIX)transmgrcom_s.$(LIB_SUFFIX) \
+			$(NULL)
+
+ifneq ($(BUILD_DCONNECT),)
+DEFINES				+= -DBUILD_DCONNECT
+LOCAL_INCLUDES		+= -I$(srcdir)/../../extensions/dconnect/src
+SHARED_LIBRARY_LIBS	+= $(DIST)/lib/$(LIB_PREFIX)ipcddconnect_s.$(LIB_SUFFIX) \
+					   $(DIST)/lib/$(LIB_PREFIX)ipcdutil_s.$(LIB_SUFFIX) \
+					   $(NULL)
+endif
+
+EXTRA_DSO_LDOPTS = \
+			$(LIBS_DIR) \
+			$(EXTRA_DSO_LIBS) \
+			$(MOZ_COMPONENT_LIBS) \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/Makefile.kup b/src/libs/xpcom18a4/ipc/ipcd/client/src/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/Makefile.kup
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnection.h b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnection.h
new file mode 100644
index 00000000..8773daa5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnection.h
@@ -0,0 +1,147 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by IBM Corporation are Copyright (C) 2003
+ * IBM Corporation. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcConnection_h__
+#define ipcConnection_h__
+
+#include "nscore.h"
+
+class ipcMessage;
+
+#define IPC_METHOD_PRIVATE_(type)   NS_HIDDEN_(type)
+#define IPC_METHOD_PRIVATE          IPC_METHOD_PRIVATE_(nsresult)
+
+/* ------------------------------------------------------------------------- */
+/* Platform specific IPC connection API.
+ */
+
+typedef void (* ipcCallbackFunc)(void *);
+
+/**
+ * IPC_Connect
+ *
+ * This function causes a connection to the IPC daemon to be established.
+ * If a connection already exists, then this function will be ignored.
+ *
+ * @param daemonPath
+ *        Specifies the path to the IPC daemon executable.
+ *
+ * NOTE: This function must be called on the main thread.
+ */
+IPC_METHOD_PRIVATE IPC_Connect(const char *daemonPath);
+
+/**
+ * IPC_Disconnect
+ *
+ * This function causes a connection to the IPC daemon to be closed.  Any
+ * unsent messages (IPC_SendMsg puts messages on a queue) will be sent to the
+ * IPC daemon before the connection is closed.
+ *
+ * NOTE: This function must be called on the main thread.
+ */
+IPC_METHOD_PRIVATE IPC_Disconnect();
+
+/**
+ * IPC_SendMsg
+ *
+ * This function sends a message to the IPC daemon.  Typically, the message
+ * is put on a queue, to be delivered asynchronously to the IPC daemon.  The
+ * ipcMessage object will be deleted when IPC_SendMsg is done with it.  The
+ * caller must not touch |msg| after passing it to IPC_SendMsg.
+ *
+ * IPC_SendMsg cannot be called before IPC_Connect or after IPC_Disconnect.
+ *
+ * NOTE: This function may be called on any thread.
+ */
+IPC_METHOD_PRIVATE IPC_SendMsg(ipcMessage *msg);
+
+/**
+ * IPC_DoCallback
+ *
+ * This function executes a callback function on the same background thread
+ * that calls IPC_OnConnectionEnd and IPC_OnMessageAvailable.
+ *
+ * If this function succeeds, then the caller is guaranteed that |func| will
+ * be called.  This guarantee is important because it allows the caller to
+ * free any memory associated with |arg| once |func| has been called.
+ *
+ * NOTE: This function may be called on any thread.
+ */
+IPC_METHOD_PRIVATE IPC_DoCallback(ipcCallbackFunc func, void *arg);
+
+/* ------------------------------------------------------------------------- */
+/* Cross-platform IPC connection methods.
+ */
+
+/**
+ * IPC_SpawnDaemon
+ *
+ * This function launches the IPC daemon process.  It is called by the platform
+ * specific IPC_Connect implementation.  It should not return until the daemon
+ * process is ready to receive a client connection or an error occurs.
+ *
+ * @param daemonPath
+ *        Specifies the path to the IPC daemon executable.
+ */
+IPC_METHOD_PRIVATE IPC_SpawnDaemon(const char *daemonPath);
+
+/* ------------------------------------------------------------------------- */
+/* IPC connection callbacks (not implemented by the connection code).
+ *
+ * NOTE: These functions execute on a background thread!!
+ */
+
+/**
+ * IPC_OnConnectionEnd
+ *
+ * This function is called whenever the connection to the IPC daemon has been
+ * terminated.  If terminated due to an abnormal error, then the error will be
+ * described by the |error| parameter.  If |error| is NS_OK, then it means the
+ * connection was closed in response to a call to IPC_Disconnect.
+ */
+IPC_METHOD_PRIVATE_(void) IPC_OnConnectionEnd(nsresult error);
+
+/**
+ * IPC_OnMessageAvailable
+ *
+ * This function is called whenever an incoming message is read from the IPC
+ * daemon.  The ipcMessage object, |msg|, must be deleted by the implementation
+ * of IPC_OnMessageAvailable when the object is no longer needed.
+ */
+IPC_METHOD_PRIVATE_(void) IPC_OnMessageAvailable(ipcMessage *msg);
+
+#endif // ipcConnection_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionStub.cpp b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionStub.cpp
new file mode 100644
index 00000000..8b985785
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionStub.cpp
@@ -0,0 +1,70 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by IBM Corporation are Copyright (C) 2003
+ * IBM Corporation. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcConnection.h"
+#include "nsError.h"
+
+//-----------------------------------------------------------------------------
+// use this file as a template to add client-side IPC connectivity.
+// 
+// NOTE: if your platform supports local domain TCP sockets, then you should
+//       be able to make use of ipcConnectionUnix.cpp.
+//-----------------------------------------------------------------------------
+
+nsresult
+IPC_Connect(const char *daemonPath)
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+nsresult
+IPC_Disconnect()
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+nsresult
+IPC_SendMsg(ipcMessage *msg)
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+nsresult
+IPC_DoCallback(ipcCallbackFunc func, void *arg)
+{
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionUnix.cpp b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionUnix.cpp
new file mode 100644
index 00000000..5cd7a0c8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionUnix.cpp
@@ -0,0 +1,615 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by IBM Corporation are Copyright (C) 2003
+ * IBM Corporation. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "private/pprio.h"
+#include "prerror.h"
+#include "prthread.h"
+#include "prlock.h"
+#include "prlog.h" // for PR_ASSERT (we don't actually use NSPR logging)
+#include "prio.h"
+
+#include "ipcConnection.h"
+#include "ipcMessageQ.h"
+#include "ipcConfig.h"
+#include "ipcLog.h"
+
+#ifdef VBOX
+# include "prenv.h"
+# include <stdio.h>
+# include <VBox/log.h>
+#endif
+
+
+//-----------------------------------------------------------------------------
+// NOTE: this code does not need to link with anything but NSPR.  that is by
+//       design, so it can be easily reused in other projects that want to 
+//       talk with mozilla's IPC daemon, but don't want to depend on xpcom.
+//       we depend at most on some xpcom header files, but no xpcom runtime
+//       symbols are used.
+//-----------------------------------------------------------------------------
+
+
+// single user systems, like OS/2, don't need these security checks.
+#ifndef XP_OS2
+#define IPC_SKIP_SECURITY_CHECKS
+#endif
+
+#ifndef IPC_SKIP_SECURITY_CHECKS
+#include <unistd.h>
+#include <sys/stat.h>
+#endif
+
+static PRStatus
+DoSecurityCheck(PRFileDesc *fd, const char *path)
+{
+#ifndef IPC_SKIP_SECURITY_CHECKS
+    //
+    // now that we have a connected socket; do some security checks on the
+    // file descriptor.
+    //
+    //   (1) make sure owner matches
+    //   (2) make sure permissions match expected permissions
+    //
+    // if these conditions aren't met then bail.
+    //
+    int unix_fd = PR_FileDesc2NativeHandle(fd);  
+
+    struct stat st;
+    if (fstat(unix_fd, &st) == -1) {
+        LOG(("stat failed"));
+        return PR_FAILURE;
+    }
+
+    if (st.st_uid != getuid() && st.st_uid != geteuid()) {
+        //
+        // on OSX 10.1.5, |fstat| has a bug when passed a file descriptor to
+        // a socket.  it incorrectly returns a UID of 0.  however, |stat|
+        // succeeds, but using |stat| introduces a race condition.
+        //
+        // XXX come up with a better security check.
+        //
+        if (st.st_uid != 0) {
+            LOG(("userid check failed"));
+            return PR_FAILURE;
+        }
+        if (stat(path, &st) == -1) {
+            LOG(("stat failed"));
+            return PR_FAILURE;
+        }
+        if (st.st_uid != getuid() && st.st_uid != geteuid()) {
+            LOG(("userid check failed"));
+            return PR_FAILURE;
+        }
+    }
+#endif
+    return PR_SUCCESS;
+}
+
+//-----------------------------------------------------------------------------
+
+struct ipcCallback : public ipcListNode<ipcCallback>
+{
+  ipcCallbackFunc  func;
+  void            *arg;
+};
+
+typedef ipcList<ipcCallback> ipcCallbackQ;
+
+//-----------------------------------------------------------------------------
+
+struct ipcConnectionState
+{
+  PRLock      *lock;
+  PRPollDesc   fds[2];
+  ipcCallbackQ callback_queue;
+  ipcMessageQ  send_queue;
+  PRUint32     send_offset; // amount of send_queue.First() already written.
+  ipcMessage  *in_msg;
+  PRBool       shutdown;
+};
+
+#define SOCK 0
+#define POLL 1
+
+static void
+ConnDestroy(ipcConnectionState *s)
+{
+  if (s->lock)
+    PR_DestroyLock(s->lock);  
+
+  if (s->fds[SOCK].fd)
+    PR_Close(s->fds[SOCK].fd);
+
+  if (s->fds[POLL].fd)
+    PR_DestroyPollableEvent(s->fds[POLL].fd);
+
+  if (s->in_msg)
+    delete s->in_msg;
+
+  s->send_queue.DeleteAll();
+  delete s;
+}
+
+static ipcConnectionState *
+ConnCreate(PRFileDesc *fd)
+{
+  ipcConnectionState *s = new ipcConnectionState;
+  if (!s)
+    return NULL;
+
+  s->lock = PR_NewLock();
+  s->fds[SOCK].fd = NULL;
+  s->fds[POLL].fd = PR_NewPollableEvent();
+  s->send_offset = 0;
+  s->in_msg = NULL;
+  s->shutdown = PR_FALSE;
+
+  if (!s->lock || !s->fds[1].fd)
+  {
+    ConnDestroy(s);
+    return NULL;
+  }
+
+  // disable inheritance of the IPC socket by children started
+  // using non-NSPR process API
+  PRStatus status = PR_SetFDInheritable(fd, PR_FALSE);
+  if (status != PR_SUCCESS)
+  {
+    LOG(("coudn't make IPC socket non-inheritable [err=%d]\n", PR_GetError()));
+    return NULL;
+  }
+
+  // store this only if we are going to succeed.
+  s->fds[SOCK].fd = fd;
+
+  return s;
+}
+
+static nsresult
+ConnRead(ipcConnectionState *s)
+{
+  char buf[1024];
+  nsresult rv = NS_OK;
+  PRInt32 n;
+
+  do
+  {
+    n = PR_Read(s->fds[SOCK].fd, buf, sizeof(buf));
+    if (n < 0)
+    {
+      PRErrorCode err = PR_GetError();
+      if (err == PR_WOULD_BLOCK_ERROR)
+      {
+        // socket is empty... we need to go back to polling.
+        break;
+      }
+      LOG(("PR_Read returned failure [err=%d]\n", err));
+      rv = NS_ERROR_UNEXPECTED;
+    }
+    else if (n == 0)
+    {
+      LOG(("PR_Read returned EOF\n"));
+      rv = NS_ERROR_UNEXPECTED;
+    }
+    else
+    {
+      const char *pdata = buf;
+      while (n)
+      {
+        PRUint32 bytesRead;
+        PRBool complete;
+
+        if (!s->in_msg)
+        {
+          s->in_msg = new ipcMessage;
+          if (!s->in_msg)
+          {
+            rv = NS_ERROR_OUT_OF_MEMORY;
+            break;
+          }
+        }
+
+        if (s->in_msg->ReadFrom(pdata, n, &bytesRead, &complete) != PR_SUCCESS)
+        {
+          LOG(("error reading IPC message\n"));
+          rv = NS_ERROR_UNEXPECTED;
+          break;
+        }
+
+        PR_ASSERT(PRUint32(n) >= bytesRead);
+        n -= bytesRead;
+        pdata += bytesRead;
+
+        if (complete)
+        {
+          // protect against weird re-entrancy cases...
+          ipcMessage *m = s->in_msg;
+          s->in_msg = NULL;
+
+          IPC_OnMessageAvailable(m);
+        }
+      }
+    }
+  }
+  while (NS_SUCCEEDED(rv));
+
+  return rv;
+}
+
+static nsresult
+ConnWrite(ipcConnectionState *s)
+{
+  nsresult rv = NS_OK;
+
+  PR_Lock(s->lock);
+
+  // write one message and then return.
+  if (s->send_queue.First())
+  {
+    PRInt32 n = PR_Write(s->fds[SOCK].fd,
+                         s->send_queue.First()->MsgBuf() + s->send_offset,
+                         s->send_queue.First()->MsgLen() - s->send_offset);
+    if (n <= 0)
+    {
+      PRErrorCode err = PR_GetError();
+      if (err == PR_WOULD_BLOCK_ERROR)
+      {
+        // socket is full... we need to go back to polling.
+      }
+      else
+      {
+        LOG(("error writing to socket [err=%d]\n", err));
+        rv = NS_ERROR_UNEXPECTED;
+      }
+    }
+    else
+    {
+      s->send_offset += n;
+      if (s->send_offset == s->send_queue.First()->MsgLen())
+      {
+        s->send_queue.DeleteFirst();
+        s->send_offset = 0;
+
+        // if the send queue is empty, then we need to stop trying to write.
+        if (s->send_queue.IsEmpty())
+          s->fds[SOCK].in_flags &= ~PR_POLL_WRITE;
+      }
+    }
+  }
+
+  PR_Unlock(s->lock);
+  return rv;
+}
+
+PR_STATIC_CALLBACK(void)
+ConnThread(void *arg)
+{
+  PRInt32 num;
+  nsresult rv = NS_OK;
+
+  ipcConnectionState *s = (ipcConnectionState *) arg;
+
+  // we monitor two file descriptors in this thread.  the first (at index 0) is
+  // the socket connection with the IPC daemon.  the second (at index 1) is the
+  // pollable event we monitor in order to know when to send messages to the
+  // IPC daemon.
+
+  s->fds[SOCK].in_flags = PR_POLL_READ;
+  s->fds[POLL].in_flags = PR_POLL_READ;
+
+  while (NS_SUCCEEDED(rv))
+  {
+    s->fds[SOCK].out_flags = 0;
+    s->fds[POLL].out_flags = 0;
+
+    //
+    // poll on the IPC socket and NSPR pollable event
+    //
+    num = PR_Poll(s->fds, 2, PR_INTERVAL_NO_TIMEOUT);
+    if (num > 0)
+    {
+      ipcCallbackQ cbs_to_run;
+
+      // check if something has been added to the send queue.  if so, then
+      // acknowledge pollable event (wait should not block), and configure
+      // poll flags to find out when we can write.
+
+      if (s->fds[POLL].out_flags & PR_POLL_READ)
+      {
+        PR_WaitForPollableEvent(s->fds[POLL].fd);
+        PR_Lock(s->lock);
+
+        if (!s->send_queue.IsEmpty())
+          s->fds[SOCK].in_flags |= PR_POLL_WRITE;
+
+        if (!s->callback_queue.IsEmpty())
+          s->callback_queue.MoveTo(cbs_to_run);
+
+        PR_Unlock(s->lock);
+      }
+
+      // check if we can read...
+      if (s->fds[SOCK].out_flags & PR_POLL_READ)
+        rv = ConnRead(s);
+
+      // check if we can write...
+      if (s->fds[SOCK].out_flags & PR_POLL_WRITE)
+        rv = ConnWrite(s);
+
+      // check if we have callbacks to run
+      while (!cbs_to_run.IsEmpty())
+      {
+        ipcCallback *cb = cbs_to_run.First();
+        (cb->func)(cb->arg);
+        cbs_to_run.DeleteFirst();
+      }
+
+      // check if we should exit this thread.  delay processing a shutdown
+      // request until after all queued up messages have been sent and until
+      // after all queued up callbacks have been run.
+      PR_Lock(s->lock);
+      if (s->shutdown && s->send_queue.IsEmpty() && s->callback_queue.IsEmpty())
+        rv = NS_ERROR_ABORT;
+      PR_Unlock(s->lock);
+    }
+    else
+    {
+      LOG(("PR_Poll returned error %d (%s), os error %d\n", PR_GetError(),
+           PR_ErrorToName(PR_GetError()), PR_GetOSError()));
+      rv = NS_ERROR_UNEXPECTED;
+    }
+  }
+
+  // notify termination of the IPC connection
+  if (rv == NS_ERROR_ABORT)
+    rv = NS_OK;
+  IPC_OnConnectionEnd(rv);
+
+  LOG(("IPC thread exiting\n"));
+}
+
+//-----------------------------------------------------------------------------
+// IPC connection API
+//-----------------------------------------------------------------------------
+
+static ipcConnectionState *gConnState = NULL;
+static PRThread *gConnThread = NULL;
+
+#ifdef DEBUG
+static PRThread *gMainThread = NULL;
+#endif
+
+nsresult
+TryConnect(PRFileDesc **result)
+{
+  PRFileDesc *fd;
+  PRNetAddr addr;
+  PRSocketOptionData opt;
+  // don't use NS_ERROR_FAILURE as we want to detect these kind of errors
+  // in the frontend
+  nsresult rv = NS_ERROR_SOCKET_FAIL;
+
+  fd = PR_OpenTCPSocket(PR_AF_LOCAL);
+  if (!fd)
+    goto end;
+
+  addr.local.family = PR_AF_LOCAL;
+  IPC_GetDefaultSocketPath(addr.local.path, sizeof(addr.local.path));
+
+  // blocking connect... will fail if no one is listening.
+  if (PR_Connect(fd, &addr, PR_INTERVAL_NO_TIMEOUT) == PR_FAILURE)
+    goto end;
+
+#ifdef VBOX
+  if (PR_GetEnv("TESTBOX_UUID"))
+    fprintf(stderr, "IPC socket path: %s\n", addr.local.path);
+  LogRel(("IPC socket path: %s\n", addr.local.path));
+#endif
+
+  // make socket non-blocking
+  opt.option = PR_SockOpt_Nonblocking;
+  opt.value.non_blocking = PR_TRUE;
+  PR_SetSocketOption(fd, &opt);
+
+  // do some security checks on connection socket...
+  if (DoSecurityCheck(fd, addr.local.path) != PR_SUCCESS)
+    goto end;
+  
+  *result = fd;
+  return NS_OK;
+
+end:
+  if (fd)
+    PR_Close(fd);
+
+  return rv;
+}
+
+nsresult
+IPC_Connect(const char *daemonPath)
+{
+  // synchronous connect, spawn daemon if necessary.
+
+  PRFileDesc *fd = NULL;
+  nsresult rv = NS_ERROR_FAILURE;
+
+  if (gConnState)
+    return NS_ERROR_ALREADY_INITIALIZED;
+
+  //
+  // here's the connection algorithm:  try to connect to an existing daemon.
+  // if the connection fails, then spawn the daemon (wait for it to be ready),
+  // and then retry the connection.  it is critical that the socket used to
+  // connect to the daemon not be inherited (this causes problems on RH9 at
+  // least).
+  //
+
+  rv = TryConnect(&fd);
+  if (NS_FAILED(rv))
+  {
+    nsresult rv1 = IPC_SpawnDaemon(daemonPath);
+    if (NS_SUCCEEDED(rv1) || rv != NS_ERROR_SOCKET_FAIL)
+      rv = rv1; 
+    if (NS_SUCCEEDED(rv))
+      rv = TryConnect(&fd);
+  }
+
+  if (NS_FAILED(rv))
+    goto end;
+
+  //
+  // ok, we have a connection to the daemon!
+  //
+
+  // build connection state object
+  gConnState = ConnCreate(fd);
+  if (!gConnState)
+  {
+    rv = NS_ERROR_OUT_OF_MEMORY;
+    goto end;
+  }
+  fd = NULL; // connection state now owns the socket
+
+  gConnThread = PR_CreateThread(PR_USER_THREAD,
+                                ConnThread,
+                                gConnState,
+                                PR_PRIORITY_NORMAL,
+                                PR_GLOBAL_THREAD,
+                                PR_JOINABLE_THREAD,
+                                0);
+  if (!gConnThread)
+  {
+    rv = NS_ERROR_OUT_OF_MEMORY;
+    goto end;
+  }
+
+#ifdef DEBUG
+  gMainThread = PR_GetCurrentThread();
+#endif
+  return NS_OK;
+
+end:
+  if (gConnState)
+  {
+    ConnDestroy(gConnState);
+    gConnState = NULL;
+  }
+  if (fd)
+    PR_Close(fd);
+  return rv;
+}
+
+nsresult
+IPC_Disconnect()
+{
+  // Must disconnect on same thread used to connect!
+  PR_ASSERT(gMainThread == PR_GetCurrentThread());
+
+  if (!gConnState || !gConnThread)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  PR_Lock(gConnState->lock);
+  gConnState->shutdown = PR_TRUE;
+  PR_SetPollableEvent(gConnState->fds[POLL].fd);
+  PR_Unlock(gConnState->lock);
+
+  PR_JoinThread(gConnThread);
+
+  ConnDestroy(gConnState);
+
+  gConnState = NULL;
+  gConnThread = NULL;
+  return NS_OK;
+}
+
+nsresult
+IPC_SendMsg(ipcMessage *msg)
+{
+  if (!gConnState || !gConnThread)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  PR_Lock(gConnState->lock);
+  gConnState->send_queue.Append(msg);
+  PR_SetPollableEvent(gConnState->fds[POLL].fd);
+  PR_Unlock(gConnState->lock);
+
+  return NS_OK;
+}
+
+nsresult
+IPC_DoCallback(ipcCallbackFunc func, void *arg)
+{
+  if (!gConnState || !gConnThread)
+    return NS_ERROR_NOT_INITIALIZED;
+  
+  ipcCallback *callback = new ipcCallback;
+  if (!callback)
+    return NS_ERROR_OUT_OF_MEMORY;
+  callback->func = func;
+  callback->arg = arg;
+
+  PR_Lock(gConnState->lock);
+  gConnState->callback_queue.Append(callback);
+  PR_SetPollableEvent(gConnState->fds[POLL].fd);
+  PR_Unlock(gConnState->lock);
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+
+#ifdef TEST_STANDALONE
+
+void IPC_OnConnectionFault(nsresult rv)
+{
+  LOG(("IPC_OnConnectionFault [rv=%x]\n", rv));
+}
+
+void IPC_OnMessageAvailable(ipcMessage *msg)
+{
+  LOG(("IPC_OnMessageAvailable\n"));
+  delete msg;
+}
+
+int main()
+{
+  IPC_InitLog(">>>");
+  IPC_Connect("/builds/moz-trunk/seamonkey-debug-build/dist/bin/mozilla-ipcd");
+  IPC_Disconnect();
+  return 0;
+}
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionWin.cpp b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionWin.cpp
new file mode 100644
index 00000000..9a99c195
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcConnectionWin.cpp
@@ -0,0 +1,332 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <windows.h>
+
+#include "prprf.h"
+#include "prmon.h"
+#include "prthread.h"
+#include "plevent.h"
+
+#include "nsIServiceManager.h"
+#include "nsIEventQueue.h"
+#include "nsIEventQueueService.h"
+#include "nsAutoLock.h"
+
+#include "ipcConfig.h"
+#include "ipcLog.h"
+#include "ipcConnection.h"
+#include "ipcm.h"
+
+
+//-----------------------------------------------------------------------------
+// NOTE: this code does not need to link with anything but NSPR.  that is by
+//       design, so it can be easily reused in other projects that want to 
+//       talk with mozilla's IPC daemon, but don't want to depend on xpcom.
+//       we depend at most on some xpcom header files, but no xpcom runtime
+//       symbols are used.
+//-----------------------------------------------------------------------------
+
+
+//-----------------------------------------------------------------------------
+// windows message thread
+//-----------------------------------------------------------------------------
+
+#define IPC_WM_SENDMSG    (WM_USER + 0x1)
+#define IPC_WM_CALLBACK   (WM_USER + 0x2)
+#define IPC_WM_SHUTDOWN   (WM_USER + 0x3)
+
+static nsresult       ipcThreadStatus = NS_OK;
+static PRThread      *ipcThread = NULL;
+static PRMonitor     *ipcMonitor = NULL;
+static HWND           ipcDaemonHwnd = NULL;
+static HWND           ipcLocalHwnd = NULL;
+static PRBool         ipcShutdown = PR_FALSE; // not accessed on message thread!!
+
+//-----------------------------------------------------------------------------
+// window proc
+//-----------------------------------------------------------------------------
+
+static LRESULT CALLBACK
+ipcThreadWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    LOG(("got message [msg=%x wparam=%x lparam=%x]\n", uMsg, wParam, lParam));
+
+    if (uMsg == WM_COPYDATA) {
+        COPYDATASTRUCT *cd = (COPYDATASTRUCT *) lParam;
+        if (cd && cd->lpData) {
+            ipcMessage *msg = new ipcMessage();
+            PRUint32 bytesRead;
+            PRBool complete;
+            PRStatus rv = msg->ReadFrom((const char *) cd->lpData, cd->cbData,
+                                        &bytesRead, &complete);
+            if (rv == PR_SUCCESS && complete)
+                IPC_OnMessageAvailable(msg); // takes ownership of msg
+            else {
+                LOG(("  unable to deliver message [complete=%u]\n", complete));
+                delete msg;
+            }
+        }
+        return TRUE;
+    }
+
+    if (uMsg == IPC_WM_SENDMSG) {
+        ipcMessage *msg = (ipcMessage *) lParam;
+        if (msg) {
+            LOG(("  sending message...\n"));
+            COPYDATASTRUCT cd;
+            cd.dwData = GetCurrentProcessId();
+            cd.cbData = (DWORD) msg->MsgLen();
+            cd.lpData = (PVOID) msg->MsgBuf();
+            SendMessageA(ipcDaemonHwnd, WM_COPYDATA, (WPARAM) hWnd, (LPARAM) &cd);
+            LOG(("  done.\n"));
+            delete msg;
+        }
+        return 0;
+    }
+
+    if (uMsg == IPC_WM_CALLBACK) {
+        ipcCallbackFunc func = (ipcCallbackFunc) wParam;
+        void *arg = (void *) lParam;
+        (func)(arg);
+        return 0;
+    }
+
+    if (uMsg == IPC_WM_SHUTDOWN) {
+        IPC_OnConnectionEnd(NS_OK);
+        PostQuitMessage(0);
+        return 0;
+    }
+
+    return DefWindowProc(hWnd, uMsg, wParam, lParam);
+}
+
+//-----------------------------------------------------------------------------
+// ipc thread functions
+//-----------------------------------------------------------------------------
+
+static void
+ipcThreadFunc(void *arg)
+{
+    LOG(("entering message thread\n"));
+
+    DWORD pid = GetCurrentProcessId();
+
+    WNDCLASS wc;
+    memset(&wc, 0, sizeof(wc));
+    wc.lpfnWndProc = ipcThreadWindowProc;
+    wc.lpszClassName = IPC_CLIENT_WINDOW_CLASS;
+    RegisterClass(&wc);
+
+    char wName[sizeof(IPC_CLIENT_WINDOW_NAME_PREFIX) + 20];
+    PR_snprintf(wName, sizeof(wName), "%s%u", IPC_CLIENT_WINDOW_NAME_PREFIX, pid);
+
+    ipcLocalHwnd = CreateWindow(IPC_CLIENT_WINDOW_CLASS, wName,
+                                0, 0, 0, 10, 10, NULL, NULL, NULL, NULL);
+
+    {
+        nsAutoMonitor mon(ipcMonitor);
+        if (!ipcLocalHwnd)
+            ipcThreadStatus = NS_ERROR_FAILURE;
+        mon.Notify();
+    }
+
+    if (ipcLocalHwnd) {
+        MSG msg;
+        while (GetMessage(&msg, ipcLocalHwnd, 0, 0))
+            DispatchMessage(&msg);
+
+        ipcShutdown = PR_TRUE; // assuming atomic memory write
+
+        DestroyWindow(ipcLocalHwnd);
+        ipcLocalHwnd = NULL;
+    }
+
+    LOG(("exiting message thread\n"));
+    return;
+}
+
+static PRStatus
+ipcThreadInit()
+{
+    if (ipcThread)
+        return PR_FAILURE;
+
+    ipcShutdown = PR_FALSE;
+
+    ipcMonitor = PR_NewMonitor();
+    if (!ipcMonitor)
+        return PR_FAILURE;
+
+    // spawn message thread
+    ipcThread = PR_CreateThread(PR_USER_THREAD, ipcThreadFunc, NULL,
+                                PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
+                                PR_JOINABLE_THREAD, 0);
+    if (!ipcThread) {
+        NS_WARNING("thread creation failed");
+        PR_DestroyMonitor(ipcMonitor);
+        ipcMonitor = NULL;
+        return PR_FAILURE;
+    }
+
+    // wait for hidden window to be created
+    {
+        nsAutoMonitor mon(ipcMonitor);
+        while (!ipcLocalHwnd && NS_SUCCEEDED(ipcThreadStatus))
+            mon.Wait();
+    }
+
+    if (NS_FAILED(ipcThreadStatus)) {
+        NS_WARNING("message thread failed");
+        return PR_FAILURE;
+    }
+
+    return PR_SUCCESS;
+}
+
+static PRStatus
+ipcThreadShutdown()
+{
+    if (PR_AtomicSet(&ipcShutdown, PR_TRUE) == PR_FALSE) {
+        LOG(("posting IPC_WM_SHUTDOWN message\n"));
+        PostMessage(ipcLocalHwnd, IPC_WM_SHUTDOWN, 0, 0);
+    }
+
+    LOG(("joining w/ message thread...\n"));
+    PR_JoinThread(ipcThread);
+    ipcThread = NULL;
+
+    //
+    // ok, now the message thread is dead
+    //
+
+    PR_DestroyMonitor(ipcMonitor);
+    ipcMonitor = NULL;
+
+    return PR_SUCCESS;
+}
+
+//-----------------------------------------------------------------------------
+// windows specific IPC connection impl
+//-----------------------------------------------------------------------------
+
+nsresult
+IPC_Disconnect()
+{
+    LOG(("IPC_Disconnect\n"));
+
+    //XXX mHaveConnection = PR_FALSE;
+    
+    if (!ipcDaemonHwnd)
+        return NS_ERROR_NOT_INITIALIZED;
+
+    if (ipcThread)
+        ipcThreadShutdown();
+
+    // clear our reference to the daemon's HWND.
+    ipcDaemonHwnd = NULL;
+    return NS_OK;
+}
+
+nsresult
+IPC_Connect(const char *daemonPath)
+{
+    LOG(("IPC_Connect\n"));
+
+    NS_ENSURE_TRUE(ipcDaemonHwnd == NULL, NS_ERROR_ALREADY_INITIALIZED);
+    nsresult rv;
+
+    ipcDaemonHwnd = FindWindow(IPC_WINDOW_CLASS, IPC_WINDOW_NAME);
+    if (!ipcDaemonHwnd) {
+        LOG(("  daemon does not appear to be running\n"));
+        //
+        // daemon does not exist; spawn daemon...
+        //
+        rv = IPC_SpawnDaemon(daemonPath);
+        if (NS_FAILED(rv))
+            return rv;
+
+        ipcDaemonHwnd = FindWindow(IPC_WINDOW_CLASS, IPC_WINDOW_NAME);
+        if (!ipcDaemonHwnd)
+            return NS_ERROR_FAILURE;
+    }
+
+    // 
+    // delay creation of the message thread until we know the daemon exists.
+    //
+    if (!ipcThread && ipcThreadInit() != PR_SUCCESS) {
+        ipcDaemonHwnd = NULL;
+        return NS_ERROR_FAILURE;
+    }
+
+    return NS_OK;
+}
+
+nsresult
+IPC_SendMsg(ipcMessage *msg)
+{
+    LOG(("IPC_SendMsg\n"));
+
+    if (ipcShutdown) {
+        LOG(("unable to send message b/c message thread is shutdown\n"));
+        goto loser;
+    }
+    if (!PostMessage(ipcLocalHwnd, IPC_WM_SENDMSG, 0, (LPARAM) msg)) {
+        LOG(("  PostMessage failed w/ error = %u\n", GetLastError()));
+        goto loser;
+    }
+    return NS_OK;
+loser:
+    delete msg;
+    return NS_ERROR_FAILURE;
+}
+
+nsresult
+IPC_DoCallback(ipcCallbackFunc func, void *arg)
+{
+    LOG(("IPC_DoCallback\n"));
+
+    if (ipcShutdown) {
+        LOG(("unable to send message b/c message thread is shutdown\n"));
+        return NS_ERROR_FAILURE;
+    }
+    if (!PostMessage(ipcLocalHwnd, IPC_WM_CALLBACK, (WPARAM) func, (LPARAM) arg)) {
+        LOG(("  PostMessage failed w/ error = %u\n", GetLastError()));
+        return NS_ERROR_FAILURE;
+    }
+    return NS_OK;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcModuleFactory.cpp b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcModuleFactory.cpp
new file mode 100644
index 00000000..7dcd6eab
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcModuleFactory.cpp
@@ -0,0 +1,196 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsIServiceManager.h"
+#include "nsIGenericFactory.h"
+#include "nsICategoryManager.h"
+#include "ipcdclient.h"
+#include "ipcService.h"
+#include "ipcConfig.h"
+#include "ipcCID.h"
+
+//-----------------------------------------------------------------------------
+// Define the contructor function for the objects
+//
+// NOTE: This creates an instance of objects by using the default constructor
+//-----------------------------------------------------------------------------
+NS_GENERIC_FACTORY_CONSTRUCTOR(ipcService)
+
+// enable this code to make the IPC service auto-start.
+#if 0
+NS_METHOD
+ipcServiceRegisterProc(nsIComponentManager *aCompMgr,
+                       nsIFile *aPath,
+                       const char *registryLocation,
+                       const char *componentType,
+                       const nsModuleComponentInfo *info)
+{
+    //
+    // add ipcService to the XPCOM startup category
+    //
+    nsCOMPtr<nsICategoryManager> catman(do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
+    if (catman) {
+        nsXPIDLCString prevEntry;
+        catman->AddCategoryEntry(NS_XPCOM_STARTUP_OBSERVER_ID, "ipcService",
+                                 IPC_SERVICE_CONTRACTID, PR_TRUE, PR_TRUE,
+                                 getter_Copies(prevEntry));
+    }
+    return NS_OK;
+}
+
+NS_METHOD
+ipcServiceUnregisterProc(nsIComponentManager *aCompMgr,
+                         nsIFile *aPath,
+                         const char *registryLocation,
+                         const nsModuleComponentInfo *info)
+{
+    nsCOMPtr<nsICategoryManager> catman(do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
+    if (catman)
+        catman->DeleteCategoryEntry(NS_XPCOM_STARTUP_OBSERVER_ID, 
+                                    IPC_SERVICE_CONTRACTID, PR_TRUE);
+    return NS_OK;
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// extensions
+
+#include "ipcLockService.h"
+#include "ipcLockCID.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(ipcLockService, Init)
+
+#include "tmTransactionService.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR(tmTransactionService)
+
+#ifdef BUILD_DCONNECT
+
+#include "ipcDConnectService.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(ipcDConnectService, Init)
+
+// enable this code to make the IPC DCONNECT service auto-start.
+NS_METHOD
+ipcDConnectServiceRegisterProc(nsIComponentManager *aCompMgr,
+                               nsIFile *aPath,
+                               const char *registryLocation,
+                               const char *componentType,
+                               const nsModuleComponentInfo *info)
+{
+    //
+    // add ipcService to the XPCOM startup category
+    //
+    nsCOMPtr<nsICategoryManager> catman(do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
+    if (catman) {
+        nsXPIDLCString prevEntry;
+        catman->AddCategoryEntry(NS_XPCOM_STARTUP_OBSERVER_ID, "ipcDConnectService",
+                                 IPC_DCONNECTSERVICE_CONTRACTID, PR_TRUE, PR_TRUE,
+                                 getter_Copies(prevEntry));
+    }
+    return NS_OK;
+}
+
+NS_METHOD
+ipcDConnectServiceUnregisterProc(nsIComponentManager *aCompMgr,
+                                 nsIFile *aPath,
+                                 const char *registryLocation,
+                                 const nsModuleComponentInfo *info)
+{
+    nsCOMPtr<nsICategoryManager> catman(do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
+    if (catman)
+        catman->DeleteCategoryEntry(NS_XPCOM_STARTUP_OBSERVER_ID, 
+                                    IPC_DCONNECTSERVICE_CONTRACTID, PR_TRUE);
+    return NS_OK;
+}
+
+#endif // BUILD_DCONNECT
+
+//-----------------------------------------------------------------------------
+// Define a table of CIDs implemented by this module along with other
+// information like the function to create an instance, contractid, and
+// class name.
+//-----------------------------------------------------------------------------
+static const nsModuleComponentInfo components[] = {
+  { IPC_SERVICE_CLASSNAME,
+    IPC_SERVICE_CID,
+    IPC_SERVICE_CONTRACTID,
+    ipcServiceConstructor },
+    /*
+    ipcServiceRegisterProc,
+    ipcServiceUnregisterProc },
+    */
+  //
+  // extensions go here:
+  //
+  { IPC_LOCKSERVICE_CLASSNAME,
+    IPC_LOCKSERVICE_CID,
+    IPC_LOCKSERVICE_CONTRACTID,
+    ipcLockServiceConstructor },
+  { IPC_TRANSACTIONSERVICE_CLASSNAME,
+    IPC_TRANSACTIONSERVICE_CID,
+    IPC_TRANSACTIONSERVICE_CONTRACTID,
+    tmTransactionServiceConstructor },
+
+#ifdef BUILD_DCONNECT
+  { IPC_DCONNECTSERVICE_CLASSNAME,
+    IPC_DCONNECTSERVICE_CID,
+    IPC_DCONNECTSERVICE_CONTRACTID,
+    ipcDConnectServiceConstructor,
+    ipcDConnectServiceRegisterProc,
+    ipcDConnectServiceUnregisterProc },
+#endif
+};
+
+//-----------------------------------------------------------------------------
+
+PR_STATIC_CALLBACK(nsresult)
+ipcdclient_init(nsIModule *module)
+{
+  return IPC_Init();
+}
+
+PR_STATIC_CALLBACK(void)
+ipcdclient_shutdown(nsIModule *module)
+{
+  IPC_Shutdown();
+}
+
+//-----------------------------------------------------------------------------
+// Implement the NSGetModule() exported function for your module
+// and the entire implementation of the module object.
+//-----------------------------------------------------------------------------
+NS_IMPL_NSGETMODULE_WITH_CTOR_DTOR(ipcdclient, components,
+                                   ipcdclient_init,
+                                   ipcdclient_shutdown)
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcService.cpp b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcService.cpp
new file mode 100644
index 00000000..6c2a1326
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcService.cpp
@@ -0,0 +1,120 @@
+/* vim:set ts=4 sw=4 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcService.h"
+
+// The ipcService implementation is nothing more than a thin XPCOM wrapper
+// around the ipcdclient.h API.
+
+NS_IMPL_THREADSAFE_ISUPPORTS1(ipcService, ipcIService)
+
+NS_IMETHODIMP
+ipcService::GetID(PRUint32 *aID)
+{
+    return IPC_GetID(aID);
+}
+
+NS_IMETHODIMP
+ipcService::AddName(const char *aName)
+{
+    return IPC_AddName(aName);
+}
+
+NS_IMETHODIMP
+ipcService::RemoveName(const char *aName)
+{
+    return IPC_RemoveName(aName);
+}
+
+NS_IMETHODIMP
+ipcService::AddClientObserver(ipcIClientObserver *aObserver)
+{
+    return IPC_AddClientObserver(aObserver);
+}
+
+NS_IMETHODIMP
+ipcService::RemoveClientObserver(ipcIClientObserver *aObserver)
+{
+    return IPC_RemoveClientObserver(aObserver);
+}
+
+NS_IMETHODIMP
+ipcService::ResolveClientName(const char *aName, PRUint32 *aID)
+{
+    return IPC_ResolveClientName(aName, aID);
+}
+
+NS_IMETHODIMP
+ipcService::ClientExists(PRUint32 aClientID, PRBool *aResult)
+{
+    return IPC_ClientExists(aClientID, aResult);
+}
+
+NS_IMETHODIMP
+ipcService::DefineTarget(const nsID &aTarget, ipcIMessageObserver *aObserver,
+                         PRBool aOnCurrentThread)
+{
+    return IPC_DefineTarget(aTarget, aObserver, aOnCurrentThread);
+}
+
+NS_IMETHODIMP
+ipcService::SendMessage(PRUint32 aReceiverID, const nsID &aTarget,
+                        const PRUint8 *aData, PRUint32 aDataLen)
+{
+    return IPC_SendMessage(aReceiverID, aTarget, aData, aDataLen);
+}
+
+NS_IMETHODIMP
+ipcService::WaitMessage(PRUint32 aSenderID, const nsID &aTarget,
+                        ipcIMessageObserver *aObserver,
+                        PRUint32 aTimeout)
+{
+    return IPC_WaitMessage(aSenderID, aTarget, aObserver, nsnull,
+                           PR_MillisecondsToInterval(aTimeout));
+}
+
+NS_IMETHODIMP
+ipcService::DisableMessageObserver(const nsID &aTarget)
+{
+    return IPC_DisableMessageObserver(aTarget);
+}
+
+NS_IMETHODIMP
+ipcService::EnableMessageObserver(const nsID &aTarget)
+{
+    return IPC_EnableMessageObserver(aTarget);
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcService.h b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcService.h
new file mode 100644
index 00000000..80f953cf
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcService.h
@@ -0,0 +1,51 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcService_h__
+#define ipcService_h__
+
+#include "ipcIService.h"
+#include "ipcdclient.h"
+
+class ipcService : public ipcIService
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_IPCISERVICE
+};
+
+#endif // !defined( ipcService_h__ )
diff --git a/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcdclient.cpp b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcdclient.cpp
new file mode 100644
index 00000000..ce0f86c8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/client/src/ipcdclient.cpp
@@ -0,0 +1,1505 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcdclient.h"
+#include "ipcConnection.h"
+#include "ipcConfig.h"
+#include "ipcMessageQ.h"
+#include "ipcMessageUtils.h"
+#include "ipcLog.h"
+#include "ipcm.h"
+
+#include "nsIFile.h"
+#include "nsEventQueueUtils.h"
+#include "nsDirectoryServiceUtils.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsCOMPtr.h"
+#include "nsHashKeys.h"
+#include "nsRefPtrHashtable.h"
+#include "nsAutoLock.h"
+#include "nsProxyRelease.h"
+#include "nsCOMArray.h"
+
+#include "prio.h"
+#include "prproces.h"
+#include "pratom.h"
+
+#ifdef VBOX
+# include <iprt/critsect.h>
+# define VBOX_WITH_IPCCLIENT_RW_CS
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+#define IPC_REQUEST_TIMEOUT PR_SecondsToInterval(30)
+
+/* ------------------------------------------------------------------------- */
+
+class ipcTargetData
+{
+public:
+  static NS_HIDDEN_(ipcTargetData*) Create();
+
+  // threadsafe addref/release
+  NS_HIDDEN_(nsrefcnt) AddRef()  { return PR_AtomicIncrement(&refcnt); }
+  NS_HIDDEN_(nsrefcnt) Release() { PRInt32 r = PR_AtomicDecrement(&refcnt); if (r == 0) delete this; return r; }
+
+  NS_HIDDEN_(void) SetObserver(ipcIMessageObserver *aObserver, PRBool aOnCurrentThread);
+
+  // protects access to the members of this class
+  PRMonitor *monitor;
+
+  // this may be null
+  nsCOMPtr<ipcIMessageObserver> observer;
+
+  // the message observer is called via this event queue
+  nsCOMPtr<nsIEventQueue> eventQ;
+
+  // incoming messages are added to this list
+  ipcMessageQ pendingQ;
+
+  // non-zero if the observer has been disabled (this means that new messages
+  // should not be dispatched to the observer until the observer is re-enabled
+  // via IPC_EnableMessageObserver).
+  PRInt32 observerDisabled;
+
+private:
+
+  ipcTargetData()
+    : monitor(nsAutoMonitor::NewMonitor("ipcTargetData"))
+    , observerDisabled(0)
+    , refcnt(0)
+    {}
+
+  ~ipcTargetData()
+  {
+    if (monitor)
+      nsAutoMonitor::DestroyMonitor(monitor);
+  }
+
+  PRInt32 refcnt;
+};
+
+ipcTargetData *
+ipcTargetData::Create()
+{
+  ipcTargetData *td = new ipcTargetData;
+  if (!td)
+    return NULL;
+
+  if (!td->monitor)
+  {
+    delete td;
+    return NULL;
+  }
+  return td;
+}
+
+void
+ipcTargetData::SetObserver(ipcIMessageObserver *aObserver, PRBool aOnCurrentThread)
+{
+  observer = aObserver;
+
+  if (aOnCurrentThread)
+    NS_GetCurrentEventQ(getter_AddRefs(eventQ));
+  else
+    eventQ = nsnull;
+}
+
+/* ------------------------------------------------------------------------- */
+
+typedef nsRefPtrHashtable<nsIDHashKey, ipcTargetData> ipcTargetMap;
+
+class ipcClientState
+{
+public:
+  static NS_HIDDEN_(ipcClientState *) Create();
+
+  ~ipcClientState()
+  {
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+    if (monitor)
+      nsAutoMonitor::DestroyMonitor(monitor);
+#else
+    RTCritSectRwDelete(&critSect);
+#endif
+  }
+
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+  //
+  // the monitor protects the targetMap and the connected and shutdown flags.
+  //
+  // NOTE: we use a PRMonitor for this instead of a PRLock because we need
+  //       the lock to be re-entrant.  since we don't ever need to wait on
+  //       this monitor, it might be worth it to implement a re-entrant
+  //       wrapper for PRLock.
+  //
+  PRMonitor    *monitor;
+#else  /* VBOX_WITH_IPCCLIENT_RW_CS */
+  RTCRITSECTRW  critSect;
+#endif /* VBOX_WITH_IPCCLIENT_RW_CS */
+  ipcTargetMap  targetMap;
+  PRBool        connected;
+  PRBool        shutdown;
+
+  // our process's client id
+  PRUint32      selfID;
+
+  nsCOMArray<ipcIClientObserver> clientObservers;
+
+private:
+
+  ipcClientState()
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+    : monitor(nsAutoMonitor::NewMonitor("ipcClientState"))
+    , connected(PR_FALSE)
+#else
+    : connected(PR_FALSE)
+#endif
+    , shutdown(PR_FALSE)
+    , selfID(0)
+  {
+#ifdef VBOX_WITH_IPCCLIENT_RW_CS
+    /* Not employing the lock validator here to keep performance up in debug builds. */
+    RTCritSectRwInitEx(&critSect, RTCRITSECT_FLAGS_NO_LOCK_VAL, NIL_RTLOCKVALCLASS, RTLOCKVAL_SUB_CLASS_NONE, NULL);
+#endif
+  }
+};
+
+ipcClientState *
+ipcClientState::Create()
+{
+  ipcClientState *cs = new ipcClientState;
+  if (!cs)
+    return NULL;
+
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+  if (!cs->monitor || !cs->targetMap.Init())
+#else
+  if (!RTCritSectRwIsInitialized(&cs->critSect) || !cs->targetMap.Init())
+#endif
+  {
+    delete cs;
+    return NULL;
+  }
+
+  return cs;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static ipcClientState *gClientState;
+
+static PRBool
+GetTarget(const nsID &aTarget, ipcTargetData **td)
+{
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+  nsAutoMonitor mon(gClientState->monitor);
+  return gClientState->targetMap.Get(nsIDHashKey(&aTarget).GetKey(), td);
+#else
+  RTCritSectRwEnterShared(&gClientState->critSect);
+  PRBool fRc = gClientState->targetMap.Get(nsIDHashKey(&aTarget).GetKey(), td);
+  RTCritSectRwLeaveShared(&gClientState->critSect);
+  return fRc;
+#endif
+}
+
+static PRBool
+PutTarget(const nsID &aTarget, ipcTargetData *td)
+{
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+  nsAutoMonitor mon(gClientState->monitor);
+  return gClientState->targetMap.Put(nsIDHashKey(&aTarget).GetKey(), td);
+#else
+  RTCritSectRwEnterExcl(&gClientState->critSect);
+  PRBool fRc = gClientState->targetMap.Put(nsIDHashKey(&aTarget).GetKey(), td);
+  RTCritSectRwLeaveExcl(&gClientState->critSect);
+  return fRc;
+#endif
+}
+
+static void
+DelTarget(const nsID &aTarget)
+{
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+  nsAutoMonitor mon(gClientState->monitor);
+  gClientState->targetMap.Remove(nsIDHashKey(&aTarget).GetKey());
+#else
+  RTCritSectRwEnterExcl(&gClientState->critSect);
+  gClientState->targetMap.Remove(nsIDHashKey(&aTarget).GetKey());
+  RTCritSectRwLeaveExcl(&gClientState->critSect);
+#endif
+}
+
+/* ------------------------------------------------------------------------- */
+
+static nsresult
+GetDaemonPath(nsCString &dpath)
+{
+  nsCOMPtr<nsIFile> file;
+
+  nsresult rv = NS_GetSpecialDirectory(NS_XPCOM_CURRENT_PROCESS_DIR,
+                                       getter_AddRefs(file));
+  if (NS_SUCCEEDED(rv))
+  {
+    rv = file->AppendNative(NS_LITERAL_CSTRING(IPC_DAEMON_APP_NAME));
+    if (NS_SUCCEEDED(rv))
+      rv = file->GetNativePath(dpath);
+  }
+
+  return rv;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void
+ProcessPendingQ(const nsID &aTarget)
+{
+  ipcMessageQ tempQ;
+
+  nsRefPtr<ipcTargetData> td;
+  if (GetTarget(aTarget, getter_AddRefs(td)))
+  {
+    nsAutoMonitor mon(td->monitor);
+
+    // if the observer for this target has been temporarily disabled, then
+    // we must not processing any pending messages at this time.
+
+    if (!td->observerDisabled)
+      td->pendingQ.MoveTo(tempQ);
+  }
+
+  // process pending queue outside monitor
+  while (!tempQ.IsEmpty())
+  {
+    ipcMessage *msg = tempQ.First();
+
+    // it is possible that messages for other targets are in the queue
+    // (currently, this can be only a IPCM_MSG_PSH_CLIENT_STATE message
+    // initially addressed to IPCM_TARGET, see IPC_OnMessageAvailable())
+    // --ignore them.
+    if (td->observer && msg->Target().Equals(aTarget))
+      td->observer->OnMessageAvailable(msg->mMetaData,
+                                       msg->Target(),
+                                       (const PRUint8 *) msg->Data(),
+                                       msg->DataLen());
+    else
+    {
+      // the IPCM target does not have an observer, and therefore any IPCM
+      // messages that make it here will simply be dropped.
+      NS_ASSERTION(aTarget.Equals(IPCM_TARGET) || msg->Target().Equals(IPCM_TARGET),
+                   "unexpected target");
+      LOG(("dropping IPCM message: type=%x\n", IPCM_GetType(msg)));
+    }
+    tempQ.DeleteFirst();
+  }
+}
+
+/* ------------------------------------------------------------------------- */
+
+// WaitTarget enables support for multiple threads blocking on the same
+// message target.  the selector is called while inside the target's monitor.
+
+typedef nsresult (* ipcMessageSelector)(
+  void *arg,
+  ipcTargetData *td,
+  const ipcMessage *msg
+);
+
+// selects any
+static nsresult
+DefaultSelector(void *arg, ipcTargetData *td, const ipcMessage *msg)
+{
+  return NS_OK;
+}
+
+static nsresult
+WaitTarget(const nsID           &aTarget,
+           PRIntervalTime        aTimeout,
+           ipcMessage          **aMsg,
+           ipcMessageSelector    aSelector = nsnull,
+           void                 *aArg = nsnull)
+{
+  *aMsg = nsnull;
+
+  if (!aSelector)
+    aSelector = DefaultSelector;
+
+  nsRefPtr<ipcTargetData> td;
+  if (!GetTarget(aTarget, getter_AddRefs(td)))
+    return NS_ERROR_INVALID_ARG; // bad aTarget
+
+  PRBool isIPCMTarget = aTarget.Equals(IPCM_TARGET);
+
+  PRIntervalTime timeStart = PR_IntervalNow();
+  PRIntervalTime timeEnd;
+  if (aTimeout == PR_INTERVAL_NO_TIMEOUT)
+    timeEnd = aTimeout;
+  else if (aTimeout == PR_INTERVAL_NO_WAIT)
+    timeEnd = timeStart;
+  else
+  {
+    timeEnd = timeStart + aTimeout;
+
+    // if overflowed, then set to max value
+    if (timeEnd < timeStart)
+      timeEnd = PR_INTERVAL_NO_TIMEOUT;
+  }
+
+  ipcMessage *lastChecked = nsnull, *beforeLastChecked = nsnull;
+  nsresult rv = NS_ERROR_ABORT;
+
+  nsAutoMonitor mon(td->monitor);
+
+  // only the ICPM target is allowed to wait for a message after shutdown
+  // (but before disconnection).  this gives client observers called from
+  // IPC_Shutdown a chance to use IPC_SendMessage to send necessary
+  // "last minute" messages to other clients.
+
+  while (gClientState->connected && (!gClientState->shutdown || isIPCMTarget))
+  {
+    NS_ASSERTION(!lastChecked, "oops");
+
+    //
+    // NOTE:
+    //
+    // we must start at the top of the pending queue, possibly revisiting
+    // messages that our selector has already rejected.  this is necessary
+    // because the queue may have been modified while we were waiting on
+    // the monitor.  the impact of this on performance remains to be seen.
+    //
+    // one cheap solution is to keep a counter that is incremented each
+    // time a message is removed from the pending queue.  that way we can
+    // avoid revisiting all messages sometimes.
+    //
+
+    lastChecked = td->pendingQ.First();
+    beforeLastChecked = nsnull;
+
+    // loop over pending queue until we find a message that our selector likes.
+    while (lastChecked)
+    {
+      //
+      // it is possible that this call to WaitTarget() has been initiated by
+      // some other selector, that might be currently processing the same
+      // message (since the message remains in the queue until the selector
+      // returns TRUE).  here we prevent this situation by using a special flag
+      // to guarantee that every message is processed only once.
+      //
+
+      if (!lastChecked->TestFlag(IPC_MSG_FLAG_IN_PROCESS))
+      {
+        lastChecked->SetFlag(IPC_MSG_FLAG_IN_PROCESS);
+        nsresult acceptedRV = (aSelector)(aArg, td, lastChecked);
+        lastChecked->ClearFlag(IPC_MSG_FLAG_IN_PROCESS);
+
+        if (acceptedRV != IPC_WAIT_NEXT_MESSAGE)
+        {
+          if (acceptedRV == NS_OK)
+          {
+            // remove from pending queue
+            if (beforeLastChecked)
+              td->pendingQ.RemoveAfter(beforeLastChecked);
+            else
+              td->pendingQ.RemoveFirst();
+
+            lastChecked->mNext = nsnull;
+            *aMsg = lastChecked;
+            break;
+          }
+          else /* acceptedRV == IPC_DISCARD_MESSAGE */
+          {
+            ipcMessage *nextToCheck = lastChecked->mNext;
+
+            // discard from pending queue
+            if (beforeLastChecked)
+              td->pendingQ.DeleteAfter(beforeLastChecked);
+            else
+              td->pendingQ.DeleteFirst();
+
+            lastChecked = nextToCheck;
+
+            continue;
+          }
+        }
+      }
+
+      beforeLastChecked = lastChecked;
+      lastChecked = lastChecked->mNext;
+    }
+
+    if (*aMsg)
+    {
+      rv = NS_OK;
+      break;
+    }
+#ifdef VBOX
+    else
+    {
+      /* Special client liveness check if there is no message to process.
+       * This is necessary as there might be several threads waiting for
+       * a message from a single client, and only one gets the DOWN msg. */
+      nsresult aliveRV = (aSelector)(aArg, td, NULL);
+      if (aliveRV != IPC_WAIT_NEXT_MESSAGE)
+      {
+        *aMsg = NULL;
+        break;
+      }
+    }
+#endif /* VBOX */
+
+    PRIntervalTime t = PR_IntervalNow();
+    if (t > timeEnd) // check if timeout has expired
+    {
+      rv = IPC_ERROR_WOULD_BLOCK;
+      break;
+    }
+    mon.Wait(timeEnd - t);
+
+    LOG(("woke up from sleep [pendingQempty=%d connected=%d shutdown=%d isIPCMTarget=%d]\n",
+          td->pendingQ.IsEmpty(), gClientState->connected,
+          gClientState->shutdown, isIPCMTarget));
+  }
+
+  return rv;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void
+PostEvent(nsIEventTarget *eventTarget, PLEvent *ev)
+{
+  if (!ev)
+    return;
+
+  nsresult rv = eventTarget->PostEvent(ev);
+  if (NS_FAILED(rv))
+  {
+    NS_WARNING("PostEvent failed");
+    PL_DestroyEvent(ev);
+  }
+}
+
+static void
+PostEventToMainThread(PLEvent *ev)
+{
+  nsCOMPtr<nsIEventQueue> eventQ;
+  NS_GetMainEventQ(getter_AddRefs(eventQ));
+  if (!eventQ)
+  {
+    NS_WARNING("unable to get reference to main event queue");
+    PL_DestroyEvent(ev);
+    return;
+  }
+  PostEvent(eventQ, ev);
+}
+
+/* ------------------------------------------------------------------------- */
+
+class ipcEvent_ClientState : public PLEvent
+{
+public:
+  ipcEvent_ClientState(PRUint32 aClientID, PRUint32 aClientState)
+    : mClientID(aClientID)
+    , mClientState(aClientState)
+  {
+    PL_InitEvent(this, nsnull, HandleEvent, DestroyEvent);
+  }
+
+  PR_STATIC_CALLBACK(void *) HandleEvent(PLEvent *ev)
+  {
+    // maybe we've been shutdown!
+    if (!gClientState)
+      return nsnull;
+
+    ipcEvent_ClientState *self = (ipcEvent_ClientState *) ev;
+
+    for (PRInt32 i=0; i<gClientState->clientObservers.Count(); ++i)
+      gClientState->clientObservers[i]->OnClientStateChange(self->mClientID,
+                                                            self->mClientState);
+    return nsnull;
+  }
+
+  PR_STATIC_CALLBACK(void) DestroyEvent(PLEvent *ev)
+  {
+    delete (ipcEvent_ClientState *) ev;
+  }
+
+private:
+  PRUint32 mClientID;
+  PRUint32 mClientState;
+};
+
+/* ------------------------------------------------------------------------- */
+
+class ipcEvent_ProcessPendingQ : public PLEvent
+{
+public:
+  ipcEvent_ProcessPendingQ(const nsID &aTarget)
+    : mTarget(aTarget)
+  {
+    PL_InitEvent(this, nsnull, HandleEvent, DestroyEvent);
+  }
+
+  PR_STATIC_CALLBACK(void *) HandleEvent(PLEvent *ev)
+  {
+    ProcessPendingQ(((ipcEvent_ProcessPendingQ *) ev)->mTarget);
+    return nsnull;
+  }
+
+  PR_STATIC_CALLBACK(void) DestroyEvent(PLEvent *ev)
+  {
+    delete (ipcEvent_ProcessPendingQ *) ev;
+  }
+
+private:
+  const nsID mTarget;
+};
+
+static void
+CallProcessPendingQ(const nsID &target, ipcTargetData *td)
+{
+  // we assume that we are inside td's monitor
+
+  PLEvent *ev = new ipcEvent_ProcessPendingQ(target);
+  if (!ev)
+    return;
+
+  nsresult rv;
+
+  if (td->eventQ)
+    rv = td->eventQ->PostEvent(ev);
+  else
+    rv = IPC_DoCallback((ipcCallbackFunc) PL_HandleEvent, ev);
+
+  if (NS_FAILED(rv))
+    PL_DestroyEvent(ev);
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void
+DisableMessageObserver(const nsID &aTarget)
+{
+  nsRefPtr<ipcTargetData> td;
+  if (GetTarget(aTarget, getter_AddRefs(td)))
+  {
+    nsAutoMonitor mon(td->monitor);
+    ++td->observerDisabled;
+  }
+}
+
+static void
+EnableMessageObserver(const nsID &aTarget)
+{
+  nsRefPtr<ipcTargetData> td;
+  if (GetTarget(aTarget, getter_AddRefs(td)))
+  {
+    nsAutoMonitor mon(td->monitor);
+    if (td->observerDisabled > 0 && --td->observerDisabled == 0)
+      if (!td->pendingQ.IsEmpty())
+        CallProcessPendingQ(aTarget, td);
+  }
+}
+
+/* ------------------------------------------------------------------------- */
+
+// converts IPCM_ERROR_* status codes to NS_ERROR_* status codes
+static nsresult nsresult_from_ipcm_result(PRInt32 status)
+{
+  nsresult rv = NS_ERROR_FAILURE;
+
+  switch (status)
+  {
+    case IPCM_ERROR_GENERIC:        rv = NS_ERROR_FAILURE; break;
+    case IPCM_ERROR_INVALID_ARG:    rv = NS_ERROR_INVALID_ARG; break;
+    case IPCM_ERROR_NO_CLIENT:      rv = NS_ERROR_CALL_FAILED; break;
+    // TODO: select better mapping for the below codes
+    case IPCM_ERROR_NO_SUCH_DATA:
+    case IPCM_ERROR_ALREADY_EXISTS: rv = NS_ERROR_FAILURE; break;
+    default:                        NS_ASSERTION(PR_FALSE, "No conversion");
+  }
+
+  return rv;
+}
+
+/* ------------------------------------------------------------------------- */
+
+// selects the next IPCM message with matching request index
+static nsresult
+WaitIPCMResponseSelector(void *arg, ipcTargetData *td, const ipcMessage *msg)
+{
+#ifdef VBOX
+  if (!msg)
+    return IPC_WAIT_NEXT_MESSAGE;
+#endif /* VBOX */
+  PRUint32 requestIndex = *(PRUint32 *) arg;
+  return IPCM_GetRequestIndex(msg) == requestIndex ? NS_OK : IPC_WAIT_NEXT_MESSAGE;
+}
+
+// wait for an IPCM response message.  if responseMsg is null, then it is
+// assumed that the caller does not care to get a reference to the
+// response itself.  if the response is an IPCM_MSG_ACK_RESULT, then the
+// status code is mapped to a nsresult and returned by this function.
+static nsresult
+WaitIPCMResponse(PRUint32 requestIndex, ipcMessage **responseMsg = nsnull)
+{
+  ipcMessage *msg;
+
+  nsresult rv = WaitTarget(IPCM_TARGET, IPC_REQUEST_TIMEOUT, &msg,
+                           WaitIPCMResponseSelector, &requestIndex);
+  if (NS_FAILED(rv))
+    return rv;
+
+  if (IPCM_GetType(msg) == IPCM_MSG_ACK_RESULT)
+  {
+    ipcMessageCast<ipcmMessageResult> result(msg);
+    if (result->Status() < 0)
+      rv = nsresult_from_ipcm_result(result->Status());
+    else
+      rv = NS_OK;
+  }
+
+  if (responseMsg)
+    *responseMsg = msg;
+  else
+    delete msg;
+
+  return rv;
+}
+
+// make an IPCM request and wait for a response.
+static nsresult
+MakeIPCMRequest(ipcMessage *msg, ipcMessage **responseMsg = nsnull)
+{
+  if (!msg)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  PRUint32 requestIndex = IPCM_GetRequestIndex(msg);
+
+  // suppress 'ProcessPendingQ' for IPCM messages until we receive the
+  // response to this IPCM request.  if we did not do this then there
+  // would be a race condition leading to the possible removal of our
+  // response from the pendingQ between sending the request and waiting
+  // for the response.
+  DisableMessageObserver(IPCM_TARGET);
+
+  nsresult rv = IPC_SendMsg(msg);
+  if (NS_SUCCEEDED(rv))
+    rv = WaitIPCMResponse(requestIndex, responseMsg);
+
+  EnableMessageObserver(IPCM_TARGET);
+  return rv;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void
+RemoveTarget(const nsID &aTarget, PRBool aNotifyDaemon)
+{
+  DelTarget(aTarget);
+
+  if (aNotifyDaemon)
+  {
+    nsresult rv = MakeIPCMRequest(new ipcmMessageClientDelTarget(aTarget));
+    if (NS_FAILED(rv))
+      LOG(("failed to delete target: rv=%x\n", rv));
+  }
+}
+
+static nsresult
+DefineTarget(const nsID           &aTarget,
+             ipcIMessageObserver  *aObserver,
+             PRBool                aOnCurrentThread,
+             PRBool                aNotifyDaemon,
+             ipcTargetData       **aResult)
+{
+  nsresult rv;
+
+  nsRefPtr<ipcTargetData> td( ipcTargetData::Create() );
+  if (!td)
+    return NS_ERROR_OUT_OF_MEMORY;
+  td->SetObserver(aObserver, aOnCurrentThread);
+
+  if (!PutTarget(aTarget, td))
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  if (aNotifyDaemon)
+  {
+    rv = MakeIPCMRequest(new ipcmMessageClientAddTarget(aTarget));
+    if (NS_FAILED(rv))
+    {
+      LOG(("failed to add target: rv=%x\n", rv));
+      RemoveTarget(aTarget, PR_FALSE);
+      return rv;
+    }
+  }
+
+  if (aResult)
+    NS_ADDREF(*aResult = td);
+  return NS_OK;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static nsresult
+TryConnect()
+{
+  nsCAutoString dpath;
+  nsresult rv = GetDaemonPath(dpath);
+  if (NS_FAILED(rv))
+    return rv;
+
+  rv = IPC_Connect(dpath.get());
+  if (NS_FAILED(rv))
+    return rv;
+
+  gClientState->connected = PR_TRUE;
+
+  rv = DefineTarget(IPCM_TARGET, nsnull, PR_FALSE, PR_FALSE, nsnull);
+  if (NS_FAILED(rv))
+    return rv;
+
+  ipcMessage *msg = NULL;
+
+  // send CLIENT_HELLO and wait for CLIENT_ID response...
+  rv = MakeIPCMRequest(new ipcmMessageClientHello(), &msg);
+  if (NS_FAILED(rv))
+  {
+#ifdef VBOX  /* MakeIPCMRequest may return a failure (e.g. NS_ERROR_CALL_FAILED) and a response msg. */
+    if (msg)
+      delete msg;
+#endif
+    return rv;
+  }
+
+  if (IPCM_GetType(msg) == IPCM_MSG_ACK_CLIENT_ID)
+    gClientState->selfID = ipcMessageCast<ipcmMessageClientID>(msg)->ClientID();
+  else
+  {
+    LOG(("unexpected response from CLIENT_HELLO message: type=%x!\n",
+        IPCM_GetType(msg)));
+    rv = NS_ERROR_UNEXPECTED;
+  }
+
+  delete msg;
+  return rv;
+}
+
+nsresult
+IPC_Init()
+{
+  NS_ENSURE_TRUE(!gClientState, NS_ERROR_ALREADY_INITIALIZED);
+
+  IPC_InitLog(">>>");
+
+  gClientState = ipcClientState::Create();
+  if (!gClientState)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  nsresult rv = TryConnect();
+  if (NS_FAILED(rv))
+    IPC_Shutdown();
+
+  return rv;
+}
+
+PR_STATIC_CALLBACK(PLDHashOperator)
+EnumerateTargetMapAndNotify(const nsID    &aKey,
+                            ipcTargetData *aData,
+                            void          *aClosure);
+
+nsresult
+IPC_Shutdown()
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  LOG(("IPC_Shutdown: connected=%d\n",gClientState->connected));
+
+  if (gClientState->connected)
+  {
+    {
+      // first, set the shutdown flag and unblock any calls to WaitTarget.
+      // all targets but IPCM will not be able to use WaitTarget any more.
+
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+      nsAutoMonitor mon(gClientState->monitor);
+#else
+      RTCritSectRwEnterExcl(&gClientState->critSect);
+#endif
+
+      gClientState->shutdown = PR_TRUE;
+      gClientState->targetMap.EnumerateRead(EnumerateTargetMapAndNotify, nsnull);
+
+#ifdef VBOX_WITH_IPCCLIENT_RW_CS
+      RTCritSectRwLeaveExcl(&gClientState->critSect);
+#endif
+    }
+
+    // inform all client observers that we're being shutdown to let interested
+    // parties gracefully uninitialize themselves.  the IPCM target is still
+    // fully operational at this point, so they can use IPC_SendMessage
+    // (this is essential for the DConnect extension, for example, to do the
+    // proper uninitialization).
+
+    ipcEvent_ClientState *ev = new ipcEvent_ClientState(IPC_SENDER_ANY,
+                                                        IPCM_CLIENT_STATE_DOWN);
+    ipcEvent_ClientState::HandleEvent (ev);
+    ipcEvent_ClientState::DestroyEvent (ev);
+
+    IPC_Disconnect();
+  }
+
+  //
+  // make gClientState nsnull before deletion to cause all public IPC_*
+  // calls (possibly made during ipcClientState destruction) to return
+  // NS_ERROR_NOT_INITIALIZED.
+  //
+  // NOTE: isn't just checking for gClientState->connected in every appropriate
+  // IPC_* method a better solution?
+  //
+  ipcClientState *aClientState = gClientState;
+  gClientState = nsnull;
+  delete aClientState;
+
+  return NS_OK;
+}
+
+/* ------------------------------------------------------------------------- */
+
+nsresult
+IPC_DefineTarget(const nsID          &aTarget,
+                 ipcIMessageObserver *aObserver,
+                 PRBool               aOnCurrentThread)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  // do not permit the re-definition of the IPCM protocol's target.
+  if (aTarget.Equals(IPCM_TARGET))
+    return NS_ERROR_INVALID_ARG;
+
+  nsresult rv;
+
+  nsRefPtr<ipcTargetData> td;
+  if (GetTarget(aTarget, getter_AddRefs(td)))
+  {
+    // clear out observer before removing target since we want to ensure that
+    // the observer is released on the main thread.
+    {
+      nsAutoMonitor mon(td->monitor);
+      td->SetObserver(aObserver, aOnCurrentThread);
+    }
+
+    // remove target outside of td's monitor to avoid holding the monitor
+    // while entering the client state's monitor.
+    if (!aObserver)
+      RemoveTarget(aTarget, PR_TRUE);
+
+    rv = NS_OK;
+  }
+  else
+  {
+    if (aObserver)
+      rv = DefineTarget(aTarget, aObserver, aOnCurrentThread, PR_TRUE, nsnull);
+    else
+      rv = NS_ERROR_INVALID_ARG; // unknown target
+  }
+
+  return rv;
+}
+
+nsresult
+IPC_DisableMessageObserver(const nsID &aTarget)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  // do not permit modifications to the IPCM protocol's target.
+  if (aTarget.Equals(IPCM_TARGET))
+    return NS_ERROR_INVALID_ARG;
+
+  DisableMessageObserver(aTarget);
+  return NS_OK;
+}
+
+nsresult
+IPC_EnableMessageObserver(const nsID &aTarget)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  // do not permit modifications to the IPCM protocol's target.
+  if (aTarget.Equals(IPCM_TARGET))
+    return NS_ERROR_INVALID_ARG;
+
+  EnableMessageObserver(aTarget);
+  return NS_OK;
+}
+
+nsresult
+IPC_SendMessage(PRUint32       aReceiverID,
+                const nsID    &aTarget,
+                const PRUint8 *aData,
+                PRUint32       aDataLen)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  // do not permit sending IPCM messages
+  if (aTarget.Equals(IPCM_TARGET))
+    return NS_ERROR_INVALID_ARG;
+
+  nsresult rv;
+  if (aReceiverID == 0)
+  {
+    ipcMessage *msg = new ipcMessage(aTarget, (const char *) aData, aDataLen);
+    if (!msg)
+      return NS_ERROR_OUT_OF_MEMORY;
+
+    rv = IPC_SendMsg(msg);
+  }
+  else
+    rv = MakeIPCMRequest(new ipcmMessageForward(IPCM_MSG_REQ_FORWARD,
+                                                aReceiverID,
+                                                aTarget,
+                                                (const char *) aData,
+                                                aDataLen));
+
+  return rv;
+}
+
+struct WaitMessageSelectorData
+{
+  PRUint32             senderID;
+  ipcIMessageObserver *observer;
+  PRBool               senderDead;
+};
+
+static nsresult WaitMessageSelector(void *arg, ipcTargetData *td, const ipcMessage *msg)
+{
+  WaitMessageSelectorData *data = (WaitMessageSelectorData *) arg;
+#ifdef VBOX
+  if (!msg)
+  {
+    /* Special NULL message which asks to check whether the client is
+     * still alive. Called when there is nothing suitable in the queue. */
+    ipcIMessageObserver *obs = data->observer;
+    if (!obs)
+      obs = td->observer;
+    NS_ASSERTION(obs, "must at least have a default observer");
+
+    nsresult rv = obs->OnMessageAvailable(IPC_SENDER_ANY, nsID(), 0, 0);
+    if (rv != IPC_WAIT_NEXT_MESSAGE)
+      data->senderDead = PR_TRUE;
+
+    return rv;
+  }
+#endif /* VBOX */
+
+  // process the specially forwarded client state message to see if the
+  // sender we're waiting a message from has died.
+
+  if (msg->Target().Equals(IPCM_TARGET))
+  {
+    switch (IPCM_GetType(msg))
+    {
+      case IPCM_MSG_PSH_CLIENT_STATE:
+      {
+        ipcMessageCast<ipcmMessageClientState> status(msg);
+        if ((data->senderID == IPC_SENDER_ANY ||
+             status->ClientID() == data->senderID) &&
+            status->ClientState() == IPCM_CLIENT_STATE_DOWN)
+        {
+          LOG(("sender (%d) we're waiting a message from (%d) has died\n",
+               status->ClientID(), data->senderID));
+
+          if (data->senderID != IPC_SENDER_ANY)
+          {
+            // we're waiting on a particular client, so IPC_WaitMessage must
+            // definitely fail with the NS_ERROR_xxx result.
+
+            data->senderDead = PR_TRUE;
+            return IPC_DISCARD_MESSAGE; // consume the message
+          }
+          else
+          {
+            // otherwise inform the observer about the client death using a special
+            // null message with an empty target id, and fail IPC_WaitMessage call
+            // with NS_ERROR_xxx only if the observer accepts this message.
+
+            ipcIMessageObserver *obs = data->observer;
+            if (!obs)
+              obs = td->observer;
+            NS_ASSERTION(obs, "must at least have a default observer");
+
+            nsresult rv = obs->OnMessageAvailable(status->ClientID(), nsID(), 0, 0);
+            if (rv != IPC_WAIT_NEXT_MESSAGE)
+              data->senderDead = PR_TRUE;
+
+            return IPC_DISCARD_MESSAGE; // consume the message
+          }
+        }
+#ifdef VBOX
+        else if ((data->senderID == IPC_SENDER_ANY ||
+                  status->ClientID() == data->senderID) &&
+                 status->ClientState() == IPCM_CLIENT_STATE_UP)
+        {
+          LOG(("sender (%d) we're waiting a message from (%d) has come up\n",
+               status->ClientID(), data->senderID));
+          if (data->senderID == IPC_SENDER_ANY)
+          {
+            // inform the observer about the client appearance using a special
+            // null message with an empty target id, but a length of 1.
+
+            ipcIMessageObserver *obs = data->observer;
+            if (!obs)
+              obs = td->observer;
+            NS_ASSERTION(obs, "must at least have a default observer");
+
+            nsresult rv = obs->OnMessageAvailable(status->ClientID(), nsID(), 0, 1);
+            /* VBoxSVC/VBoxXPCOMIPCD auto-start can cause that a client up
+             * message arrives while we're already waiting for a response
+             * from this client. Don't declare the connection as dead in
+             * this case. A client ID wraparound can't falsely trigger
+             * this, since the waiting thread would have hit the liveness
+             * check in the mean time. We MUST consume the message, otherwise
+             * IPCM messages pile up as long as there is a pending call, which
+             * can lead to severe processing overhead. */
+            return IPC_DISCARD_MESSAGE; // consume the message
+          }
+        }
+#endif /* VBOX */
+        break;
+      }
+      default:
+        NS_NOTREACHED("unexpected message");
+    }
+    return IPC_WAIT_NEXT_MESSAGE; // continue iterating
+  }
+
+  nsresult rv = IPC_WAIT_NEXT_MESSAGE;
+
+  if (data->senderID == IPC_SENDER_ANY ||
+      msg->mMetaData == data->senderID)
+  {
+    ipcIMessageObserver *obs = data->observer;
+    if (!obs)
+      obs = td->observer;
+    NS_ASSERTION(obs, "must at least have a default observer");
+
+    rv = obs->OnMessageAvailable(msg->mMetaData,
+                                 msg->Target(),
+                                 (const PRUint8 *) msg->Data(),
+                                 msg->DataLen());
+  }
+
+  // stop iterating if we got a match that the observer accepted.
+  return rv != IPC_WAIT_NEXT_MESSAGE ? NS_OK : IPC_WAIT_NEXT_MESSAGE;
+}
+
+nsresult
+IPC_WaitMessage(PRUint32             aSenderID,
+                const nsID          &aTarget,
+                ipcIMessageObserver *aObserver,
+                ipcIMessageObserver *aConsumer,
+                PRIntervalTime       aTimeout)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  // do not permit waiting for IPCM messages
+  if (aTarget.Equals(IPCM_TARGET))
+    return NS_ERROR_INVALID_ARG;
+
+  // use aObserver as the message selector
+  WaitMessageSelectorData data = { aSenderID, aObserver, PR_FALSE };
+
+  ipcMessage *msg;
+  nsresult rv = WaitTarget(aTarget, aTimeout, &msg, WaitMessageSelector, &data);
+  if (NS_FAILED(rv))
+    return rv;
+
+  // if the selector has accepted some message, then we pass it to aConsumer
+  // for safe processing.  The IPC susbsystem is quite stable here (i.e. we're
+  // not inside any of the monitors, and the message has been already removed
+  // from the pending queue).
+  if (aObserver && aConsumer)
+  {
+    aConsumer->OnMessageAvailable(msg->mMetaData,
+                                  msg->Target(),
+                                  (const PRUint8 *) msg->Data(),
+                                  msg->DataLen());
+  }
+
+  delete msg;
+
+  // if the requested sender has died while waiting, return an error
+  if (data.senderDead)
+    return NS_ERROR_ABORT; // XXX better error code?
+
+  return NS_OK;
+}
+
+/* ------------------------------------------------------------------------- */
+
+nsresult
+IPC_GetID(PRUint32 *aClientID)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  *aClientID = gClientState->selfID;
+  return NS_OK;
+}
+
+nsresult
+IPC_AddName(const char *aName)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  return MakeIPCMRequest(new ipcmMessageClientAddName(aName));
+}
+
+nsresult
+IPC_RemoveName(const char *aName)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  return MakeIPCMRequest(new ipcmMessageClientDelName(aName));
+}
+
+/* ------------------------------------------------------------------------- */
+
+nsresult
+IPC_AddClientObserver(ipcIClientObserver *aObserver)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  return gClientState->clientObservers.AppendObject(aObserver)
+      ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+}
+
+nsresult
+IPC_RemoveClientObserver(ipcIClientObserver *aObserver)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  for (PRInt32 i = 0; i < gClientState->clientObservers.Count(); ++i)
+  {
+    if (gClientState->clientObservers[i] == aObserver)
+      gClientState->clientObservers.RemoveObjectAt(i);
+  }
+
+  return NS_OK;
+}
+
+/* ------------------------------------------------------------------------- */
+
+// this function could be called on any thread
+nsresult
+IPC_ResolveClientName(const char *aName, PRUint32 *aClientID)
+{
+  NS_ENSURE_TRUE(gClientState, NS_ERROR_NOT_INITIALIZED);
+
+  ipcMessage *msg = NULL;
+
+  nsresult rv = MakeIPCMRequest(new ipcmMessageQueryClientByName(aName), &msg);
+  if (NS_FAILED(rv))
+  {
+#ifdef VBOX  /* MakeIPCMRequest may return a failure (e.g. NS_ERROR_CALL_FAILED) and a response msg. */
+    if (msg)
+      delete msg;
+#endif
+    return rv;
+  }
+
+  if (IPCM_GetType(msg) == IPCM_MSG_ACK_CLIENT_ID)
+    *aClientID = ipcMessageCast<ipcmMessageClientID>(msg)->ClientID();
+  else
+  {
+    LOG(("unexpected IPCM response: type=%x\n", IPCM_GetType(msg)));
+    rv = NS_ERROR_UNEXPECTED;
+  }
+
+  delete msg;
+  return rv;
+}
+
+/* ------------------------------------------------------------------------- */
+
+nsresult
+IPC_ClientExists(PRUint32 aClientID, PRBool *aResult)
+{
+  // this is a bit of a hack.  we forward a PING to the specified client.
+  // the assumption is that the forwarding will only succeed if the client
+  // exists, so we wait for the RESULT message corresponding to the FORWARD
+  // request.  if that gives a successful status, then we know that the
+  // client exists.
+
+  ipcmMessagePing ping;
+
+  return MakeIPCMRequest(new ipcmMessageForward(IPCM_MSG_REQ_FORWARD,
+                                                aClientID,
+                                                IPCM_TARGET,
+                                                ping.Data(),
+                                                ping.DataLen()));
+}
+
+/* ------------------------------------------------------------------------- */
+
+nsresult
+IPC_SpawnDaemon(const char *path)
+{
+  PRFileDesc *readable = nsnull, *writable = nsnull;
+  PRProcessAttr *attr = nsnull;
+  nsresult rv = NS_ERROR_FAILURE;
+  PRFileDesc *devNull;
+  char *const argv[] = { (char *const) path, nsnull };
+  char c;
+
+  // setup an anonymous pipe that we can use to determine when the daemon
+  // process has started up.  the daemon will write a char to the pipe, and
+  // when we read it, we'll know to proceed with trying to connect to the
+  // daemon.
+
+  if (PR_CreatePipe(&readable, &writable) != PR_SUCCESS)
+    goto end;
+  PR_SetFDInheritable(writable, PR_TRUE);
+
+  attr = PR_NewProcessAttr();
+  if (!attr)
+    goto end;
+
+  if (PR_ProcessAttrSetInheritableFD(attr, writable, IPC_STARTUP_PIPE_NAME) != PR_SUCCESS)
+  goto end;
+
+  devNull = PR_Open("/dev/null", PR_RDWR, 0);
+  if (!devNull)
+    goto end;
+
+  PR_ProcessAttrSetStdioRedirect(attr, PR_StandardInput, devNull);
+  PR_ProcessAttrSetStdioRedirect(attr, PR_StandardOutput, devNull);
+  PR_ProcessAttrSetStdioRedirect(attr, PR_StandardError, devNull);
+
+  if (PR_CreateProcessDetached(path, argv, nsnull, attr) != PR_SUCCESS)
+    goto end;
+
+  // Close /dev/null
+  PR_Close(devNull);
+  // close the child end of the pipe in order to get notification on unexpected
+  // child termination instead of being infinitely blocked in PR_Read().
+  PR_Close(writable);
+  writable = nsnull;
+
+  if ((PR_Read(readable, &c, 1) != 1) || (c != IPC_STARTUP_PIPE_MAGIC))
+    goto end;
+
+  rv = NS_OK;
+end:
+  if (readable)
+    PR_Close(readable);
+  if (writable)
+    PR_Close(writable);
+  if (attr)
+    PR_DestroyProcessAttr(attr);
+  return rv;
+}
+
+/* ------------------------------------------------------------------------- */
+
+PR_STATIC_CALLBACK(PLDHashOperator)
+EnumerateTargetMapAndNotify(const nsID    &aKey,
+                            ipcTargetData *aData,
+                            void          *aClosure)
+{
+  nsAutoMonitor mon(aData->monitor);
+
+  // wake up anyone waiting on this target.
+  mon.NotifyAll();
+
+  return PL_DHASH_NEXT;
+}
+
+// called on a background thread
+void
+IPC_OnConnectionEnd(nsresult error)
+{
+  // now, go through the target map, and tickle each monitor.  that should
+  // unblock any calls to WaitTarget.
+
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+  nsAutoMonitor mon(gClientState->monitor);
+#else
+  RTCritSectRwEnterExcl(&gClientState->critSect);
+#endif
+
+  gClientState->connected = PR_FALSE;
+  gClientState->targetMap.EnumerateRead(EnumerateTargetMapAndNotify, nsnull);
+
+#ifdef VBOX_WITH_IPCCLIENT_RW_CS
+  RTCritSectRwLeaveExcl(&gClientState->critSect);
+#endif
+}
+
+/* ------------------------------------------------------------------------- */
+
+static void
+PlaceOnPendingQ(const nsID &target, ipcTargetData *td, ipcMessage *msg)
+{
+  nsAutoMonitor mon(td->monitor);
+
+  // we only want to dispatch a 'ProcessPendingQ' event if we have not
+  // already done so.
+  PRBool dispatchEvent = td->pendingQ.IsEmpty();
+
+  // put this message on our pending queue
+  td->pendingQ.Append(msg);
+
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    char *targetStr = target.ToString();
+    LOG(("placed message on pending queue for target %s and notifying all...\n", targetStr));
+    nsMemory::Free(targetStr);
+  }
+#endif
+
+  // wake up anyone waiting on this queue
+  mon.NotifyAll();
+
+  // proxy call to target's message procedure
+  if (dispatchEvent)
+    CallProcessPendingQ(target, td);
+}
+
+PR_STATIC_CALLBACK(PLDHashOperator)
+EnumerateTargetMapAndPlaceMsg(const nsID    &aKey,
+                              ipcTargetData *aData,
+                              void          *userArg)
+{
+  if (!aKey.Equals(IPCM_TARGET))
+  {
+    // place a message clone to a target's event queue
+    ipcMessage *msg = (ipcMessage *) userArg;
+    PlaceOnPendingQ(aKey, aData, msg->Clone());
+  }
+
+  return PL_DHASH_NEXT;
+}
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef IPC_LOGGING
+#include "prprf.h"
+#include <ctype.h>
+#endif
+
+// called on a background thread
+void
+IPC_OnMessageAvailable(ipcMessage *msg)
+{
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    char *targetStr = msg->Target().ToString();
+    LOG(("got message for target: %s\n", targetStr));
+    nsMemory::Free(targetStr);
+
+//     IPC_LogBinary((const PRUint8 *) msg->Data(), msg->DataLen());
+  }
+#endif
+
+  if (msg->Target().Equals(IPCM_TARGET))
+  {
+    switch (IPCM_GetType(msg))
+    {
+      // if this is a forwarded message, then post the inner message instead.
+      case IPCM_MSG_PSH_FORWARD:
+      {
+        ipcMessageCast<ipcmMessageForward> fwd(msg);
+        ipcMessage *innerMsg = new ipcMessage(fwd->InnerTarget(),
+                                              fwd->InnerData(),
+                                              fwd->InnerDataLen());
+        // store the sender's client id in the meta-data field of the message.
+        innerMsg->mMetaData = fwd->ClientID();
+
+        delete msg;
+
+        // recurse so we can handle forwarded IPCM messages
+        IPC_OnMessageAvailable(innerMsg);
+        return;
+      }
+      case IPCM_MSG_PSH_CLIENT_STATE:
+      {
+        ipcMessageCast<ipcmMessageClientState> status(msg);
+        PostEventToMainThread(new ipcEvent_ClientState(status->ClientID(),
+                                                       status->ClientState()));
+
+        // go through the target map, and place this message to every target's
+        // pending event queue.  that unblocks all WaitTarget calls (on all
+        // targets) giving them an opportuninty to finish wait cycle because of
+        // the peer client death, when appropriate.
+#ifndef VBOX_WITH_IPCCLIENT_RW_CS
+        nsAutoMonitor mon(gClientState->monitor);
+#else
+        RTCritSectRwEnterShared(&gClientState->critSect);
+#endif
+
+        gClientState->targetMap.EnumerateRead(EnumerateTargetMapAndPlaceMsg, msg);
+
+#ifdef VBOX_WITH_IPCCLIENT_RW_CS
+        RTCritSectRwLeaveShared(&gClientState->critSect);
+#endif
+        delete msg;
+
+        return;
+      }
+    }
+  }
+
+  nsRefPtr<ipcTargetData> td;
+  if (GetTarget(msg->Target(), getter_AddRefs(td)))
+  {
+    // make copy of target since |msg| may end up pointing to free'd memory
+    // once we notify the monitor inside PlaceOnPendingQ().
+    const nsID target = msg->Target();
+
+    PlaceOnPendingQ(target, td, msg);
+  }
+  else
+  {
+    NS_WARNING("message target is undefined");
+#ifdef VBOX
+    delete msg;
+#endif
+  }
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/public/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/public/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/Makefile.in
new file mode 100644
index 00000000..ad1a66b7
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/Makefile.in
@@ -0,0 +1,52 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+EXPORTS     = \
+            ipcModule.h \
+            ipcModuleUtil.h \
+            $(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/public/ipcModule.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/ipcModule.h
new file mode 100644
index 00000000..2f299f70
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/ipcModule.h
@@ -0,0 +1,240 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcModule_h__
+#define ipcModule_h__
+
+#include "nsID.h"
+
+//
+// a client handle is used to efficiently reference a client instance object
+// used by the daemon to represent a connection with a particular client app.
+//
+// modules should treat it as an opaque type.
+//
+typedef class ipcClient *ipcClientHandle;
+
+//-----------------------------------------------------------------------------
+// interface implemented by the module:
+//-----------------------------------------------------------------------------
+
+//
+// the version of ipcModuleMethods data structure.
+//
+#define IPC_MODULE_METHODS_VERSION (1<<16) // 1.0
+
+//
+// each module defines the following structure:
+//
+struct ipcModuleMethods
+{
+    //
+    // this field holds the version of the data structure, which is always the
+    // value of IPC_MODULE_METHODS_VERSION against which the module was built.
+    //
+    PRUint32 version;
+
+    //
+    // called after this module is registered.
+    //
+    void (* init) (void);
+
+    //
+    // called when this module will no longer be accessed.
+    //
+    void (* shutdown) (void);
+
+    //
+    // called when a new message arrives for this module.
+    //
+    // params:
+    //   client  - an opaque "handle" to an object representing the client that
+    //             sent the message.  modules should not store the value of this
+    //             beyond the duration fo this function call.  (e.g., the handle
+    //             may be invalid after this function call returns.)  modules
+    //             wishing to hold onto a reference to a "client" should store
+    //             the client's ID (see IPC_GetClientID).
+    //   target  - message target
+    //   data    - message data
+    //   dataLen - message data length
+    //
+    void (* handleMsg) (ipcClientHandle client,
+                        const nsID     &target,
+                        const void     *data,
+                        PRUint32        dataLen);
+
+    //
+    // called when a new client connects to the IPC daemon.
+    //
+    void (* clientUp) (ipcClientHandle client);
+
+    //
+    // called when a client disconnects from the IPC daemon.
+    //
+    void (* clientDown) (ipcClientHandle client);
+};
+
+//-----------------------------------------------------------------------------
+// interface implemented by the daemon:
+//-----------------------------------------------------------------------------
+
+//
+// the version of ipcDaemonMethods data structure.
+//
+#define IPC_DAEMON_METHODS_VERSION (1<<16) // 1.0
+
+//
+// enumeration functions may return FALSE to stop enumeration.
+//
+typedef PRBool (* ipcClientEnumFunc)       (void *closure, ipcClientHandle client, PRUint32 clientID);
+typedef PRBool (* ipcClientNameEnumFunc)   (void *closure, ipcClientHandle client, const char *name);
+typedef PRBool (* ipcClientTargetEnumFunc) (void *closure, ipcClientHandle client, const nsID &target);
+
+//
+// the daemon provides the following structure:
+//
+struct ipcDaemonMethods
+{
+    PRUint32 version;
+
+    //
+    // called to send a message to another module.
+    //
+    // params:
+    //   client  - identifies the client from which this message originated.
+    //   target  - message target
+    //   data    - message data
+    //   dataLen - message data length
+    //
+    // returns:
+    //   PR_SUCCESS if message was dispatched.
+    //   PR_FAILURE if message could not be dispatched (possibly because
+    //              no module is registered for the given message target).
+    //
+    PRStatus (* dispatchMsg) (ipcClientHandle client, 
+                              const nsID     &target,
+                              const void     *data,
+                              PRUint32        dataLen);
+
+    //
+    // called to send a message to a particular client or to broadcast a
+    // message to all clients.
+    //
+    // params:
+    //   client  - if null, then broadcast message to all clients.  otherwise,
+    //             send message to the client specified.
+    //   target  - message target
+    //   data    - message data
+    //   dataLen - message data length
+    //
+    // returns:
+    //   PR_SUCCESS if message was sent (or queued up to be sent later).
+    //   PR_FAILURE if message could not be sent (possibly because the client
+    //              does not have a registered observer for the msg's target).
+    //
+    PRStatus (* sendMsg) (ipcClientHandle client,
+                          const nsID     &target,
+                          const void     *data,
+                          PRUint32        dataLen);
+
+    //
+    // called to lookup a client handle given its client ID.  each client has
+    // a unique ID.
+    //
+    ipcClientHandle (* getClientByID) (PRUint32 clientID);
+
+    //
+    // called to lookup a client by name or alias.  names are not necessary
+    // unique to individual clients.  this function returns the client first
+    // registered under the given name.
+    //
+    ipcClientHandle (* getClientByName) (const char *name);
+
+    //
+    // called to enumerate all clients.
+    //
+    void (* enumClients) (ipcClientEnumFunc func, void *closure);
+
+    //
+    // returns the client ID of the specified client.
+    //
+    PRUint32 (* getClientID) (ipcClientHandle client);
+
+    //
+    // functions for inspecting the names and targets defined for a particular
+    // client instance.
+    //
+    PRBool (* clientHasName)     (ipcClientHandle client, const char *name);
+    PRBool (* clientHasTarget)   (ipcClientHandle client, const nsID &target);
+    void   (* enumClientNames)   (ipcClientHandle client, ipcClientNameEnumFunc func, void *closure);
+    void   (* enumClientTargets) (ipcClientHandle client, ipcClientTargetEnumFunc func, void *closure);
+};
+
+//-----------------------------------------------------------------------------
+// interface exported by a DSO implementing one or more modules:
+//-----------------------------------------------------------------------------
+
+struct ipcModuleEntry
+{
+    //
+    // identifies the message target of this module.
+    //
+    nsID target;
+
+    //
+    // module methods
+    //
+    ipcModuleMethods *methods;
+};
+
+//-----------------------------------------------------------------------------
+
+#define IPC_EXPORT extern "C" NS_EXPORT
+
+//
+// IPC_EXPORT int IPC_GetModules(const ipcDaemonMethods *, const ipcModuleEntry **);
+//
+// params:
+//   methods - the daemon's methods
+//   entries - the module entries defined by the DSO
+//
+// returns:
+//   length of the |entries| array.
+//
+typedef int (* ipcGetModulesFunc) (const ipcDaemonMethods *methods, const ipcModuleEntry **entries);
+
+#endif // !ipcModule_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/public/ipcModuleUtil.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/ipcModuleUtil.h
new file mode 100644
index 00000000..0d1703a8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/public/ipcModuleUtil.h
@@ -0,0 +1,151 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcModuleUtil_h__
+#define ipcModuleUtil_h__
+
+#include "prlog.h"
+#include "ipcModule.h"
+
+extern const ipcDaemonMethods *gIPCDaemonMethods;
+
+//-----------------------------------------------------------------------------
+// inline wrapper functions
+// 
+// these functions may only be called by a module that uses the
+// IPC_IMPL_GETMODULES macro.
+//-----------------------------------------------------------------------------
+
+inline PRStatus
+IPC_DispatchMsg(ipcClientHandle client, const nsID &target, const void *data, PRUint32 dataLen)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->dispatchMsg(client, target, data, dataLen);
+}
+
+inline PRStatus
+IPC_SendMsg(ipcClientHandle client, const nsID &target, const void *data, PRUint32 dataLen)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->sendMsg(client, target, data, dataLen);
+}
+
+inline ipcClientHandle
+IPC_GetClientByID(PRUint32 id)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->getClientByID(id);
+}
+
+inline ipcClientHandle
+IPC_GetClientByName(const char *name)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->getClientByName(name);
+}
+
+inline void
+IPC_EnumClients(ipcClientEnumFunc func, void *closure)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    gIPCDaemonMethods->enumClients(func, closure);
+}
+
+inline PRUint32
+IPC_GetClientID(ipcClientHandle client)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->getClientID(client);
+}
+
+inline PRBool
+IPC_ClientHasName(ipcClientHandle client, const char *name)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->clientHasName(client, name);
+}
+
+inline PRBool
+IPC_ClientHasTarget(ipcClientHandle client, const nsID &target)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    return gIPCDaemonMethods->clientHasTarget(client, target);
+}
+
+inline void
+IPC_EnumClientNames(ipcClientHandle client, ipcClientNameEnumFunc func, void *closure)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    gIPCDaemonMethods->enumClientNames(client, func, closure);
+}
+
+inline void
+IPC_EnumClientTargets(ipcClientHandle client, ipcClientTargetEnumFunc func, void *closure)
+{
+    PR_ASSERT(gIPCDaemonMethods);
+    gIPCDaemonMethods->enumClientTargets(client, func, closure);
+}
+
+//-----------------------------------------------------------------------------
+// inline composite functions
+//-----------------------------------------------------------------------------
+
+inline PRStatus
+IPC_SendMsg(PRUint32 clientID, const nsID &target, const void *data, PRUint32 dataLen)
+{
+    ipcClient *client = IPC_GetClientByID(clientID);
+    if (!client)
+        return PR_FAILURE;
+    return IPC_SendMsg(client, target, data, dataLen);
+}
+
+//-----------------------------------------------------------------------------
+// module factory macros
+//-----------------------------------------------------------------------------
+
+#define IPC_IMPL_GETMODULES(_modName, _modEntries)                  \
+    const ipcDaemonMethods *gIPCDaemonMethods;                      \
+    IPC_EXPORT int                                                  \
+    IPC_GetModules(const ipcDaemonMethods *dmeths,                  \
+                   const ipcModuleEntry **ents) {                   \
+        /* XXX do version checking */                               \
+        gIPCDaemonMethods = dmeths;                                 \
+        *ents = _modEntries;                                        \
+        return sizeof(_modEntries) / sizeof(ipcModuleEntry);        \
+    }
+
+#endif // !ipcModuleUtil_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/.cvsignore
new file mode 100644
index 00000000..8d974b7c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/.cvsignore
@@ -0,0 +1,2 @@
+Makefile
+mozilla-ipcd
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/Makefile.in
new file mode 100644
index 00000000..e9ef6c38
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/Makefile.in
@@ -0,0 +1,88 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+
+# required for #include "nsID.h"
+REQUIRES	= \
+            xpcom \
+            $(NULL)
+
+CPPSRCS		= \
+            ipcd.cpp \
+            ipcClient.cpp \
+            ipcModuleReg.cpp \
+            ipcCommandModule.cpp
+
+ifeq ($(OS_ARCH),WINNT)
+CPPSRCS +=  ipcdWin.cpp
+else
+ifeq ($(OS_ARCH),BeOS)
+CPPSRCS +=  ipcdStub.cpp
+else
+CPPSRCS +=  ipcdUnix.cpp
+endif
+endif
+
+PROGRAM =   mozilla-ipcd$(BIN_SUFFIX)
+
+LOCAL_INCLUDES  = \
+            -I$(srcdir)/../../shared/src \
+            $(NULL)
+
+include $(topsrcdir)/config/config.mk
+
+LIBS		= \
+            $(DIST)/lib/$(LIB_PREFIX)ipcdshared_s.$(LIB_SUFFIX) \
+            $(EXTRA_DSO_LIBS) \
+            $(NSPR_LIBS) \
+            $(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
+# For fruncate
+ifeq ($(OS_ARCH),Linux)
+DEFINES += -D_BSD_SOURCE
+endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcClient.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcClient.cpp
new file mode 100644
index 00000000..4f68d175
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcClient.cpp
@@ -0,0 +1,235 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcLog.h"
+#include "ipcClient.h"
+#include "ipcMessage.h"
+#include "ipcModuleReg.h"
+#include "ipcd.h"
+#include "ipcm.h"
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+#include "prio.h"
+#endif
+
+PRUint32 ipcClient::gLastID = 0;
+
+//
+// called to initialize this client context
+//
+// assumptions:
+//  - object's memory has already been zero'd out.
+//
+void
+ipcClient::Init()
+{
+    mID = ++gLastID;
+
+    // every client must be able to handle IPCM messages.
+    mTargets.Append(IPCM_TARGET);
+
+    // although it is tempting to fire off the NotifyClientUp event at this
+    // time, we must wait until the client sends us a CLIENT_HELLO event.
+    // see ipcCommandModule::OnClientHello.
+}
+
+//
+// called when this client context is going away
+//
+void
+ipcClient::Finalize()
+{
+    IPC_NotifyClientDown(this);
+
+    mNames.DeleteAll();
+    mTargets.DeleteAll();
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+    mInMsg.Reset();
+    mOutMsgQ.DeleteAll();
+#endif
+}
+
+void
+ipcClient::AddName(const char *name)
+{
+    LOG(("adding client name: %s\n", name));
+
+    if (HasName(name))
+        return;
+
+    mNames.Append(name);
+}
+
+PRBool
+ipcClient::DelName(const char *name)
+{
+    LOG(("deleting client name: %s\n", name));
+
+    return mNames.FindAndDelete(name);
+}
+
+void
+ipcClient::AddTarget(const nsID &target)
+{
+    LOG(("adding client target\n"));
+
+    if (HasTarget(target))
+        return;
+
+    mTargets.Append(target);
+}
+
+PRBool
+ipcClient::DelTarget(const nsID &target)
+{
+    LOG(("deleting client target\n"));
+
+    //
+    // cannot remove the IPCM target
+    //
+    if (!target.Equals(IPCM_TARGET))
+        return mTargets.FindAndDelete(target);
+
+    return PR_FALSE;
+}
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+
+//
+// called to process a client socket
+//
+// params:
+//   fd         - the client socket
+//   poll_flags - the state of the client socket
+//
+// return:
+//   0             - to end session with this client
+//   PR_POLL_READ  - to wait for the client socket to become readable
+//   PR_POLL_WRITE - to wait for the client socket to become writable
+//
+int
+ipcClient::Process(PRFileDesc *fd, int inFlags)
+{
+    if (inFlags & (PR_POLL_ERR    | PR_POLL_HUP |
+                   PR_POLL_EXCEPT | PR_POLL_NVAL)) {
+        LOG(("client socket appears to have closed\n"));
+        return 0;
+    }
+
+    // expect to wait for more data
+    int outFlags = PR_POLL_READ;
+
+    if (inFlags & PR_POLL_READ) {
+        LOG(("client socket is now readable\n"));
+
+        char buf[1024]; // XXX make this larger?
+        PRInt32 n;
+
+        // find out how much data is available for reading...
+        // n = PR_Available(fd);
+
+        n = PR_Read(fd, buf, sizeof(buf));
+        if (n <= 0)
+            return 0; // cancel connection
+
+        const char *ptr = buf;
+        while (n) {
+            PRUint32 nread;
+            PRBool complete;
+
+            if (mInMsg.ReadFrom(ptr, PRUint32(n), &nread, &complete) == PR_FAILURE) {
+                LOG(("message appears to be malformed; dropping client connection\n"));
+                return 0;
+            }
+
+            if (complete) {
+                IPC_DispatchMsg(this, &mInMsg);
+                mInMsg.Reset();
+            }
+
+            n -= nread;
+            ptr += nread;
+        }
+    }
+
+    if (inFlags & PR_POLL_WRITE) {
+        LOG(("client socket is now writable\n"));
+
+        if (mOutMsgQ.First())
+            WriteMsgs(fd);
+    }
+
+    if (mOutMsgQ.First())
+        outFlags |= PR_POLL_WRITE;
+
+    return outFlags;
+}
+
+//
+// called to write out any messages from the outgoing queue.
+//
+int
+ipcClient::WriteMsgs(PRFileDesc *fd)
+{
+    while (mOutMsgQ.First()) {
+        const char *buf = (const char *) mOutMsgQ.First()->MsgBuf();
+        PRInt32 bufLen = (PRInt32) mOutMsgQ.First()->MsgLen();
+
+        if (mSendOffset) {
+            buf += mSendOffset;
+            bufLen -= mSendOffset;
+        }
+
+        PRInt32 nw = PR_Write(fd, buf, bufLen);
+        if (nw <= 0)
+            break;
+
+        LOG(("wrote %d bytes\n", nw));
+
+        if (nw == bufLen) {
+            mOutMsgQ.DeleteFirst();
+            mSendOffset = 0;
+        }
+        else
+            mSendOffset += nw;
+    }
+
+    return 0;
+}
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcClient.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcClient.h
new file mode 100644
index 00000000..12e479cf
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcClient.h
@@ -0,0 +1,144 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcClientUnix_h__
+#define ipcClientUnix_h__
+
+#include "prio.h"
+#include "ipcMessageQ.h"
+#include "ipcStringList.h"
+#include "ipcIDList.h"
+
+#ifdef XP_WIN
+#include <windows.h>
+#endif
+
+//-----------------------------------------------------------------------------
+// ipcClient
+//
+// NOTE: this class is an implementation detail of the IPC daemon. IPC daemon
+// modules (other than the built-in IPCM module) must not access methods on
+// this class directly. use the API provided via ipcd.h instead.
+//-----------------------------------------------------------------------------
+
+class ipcClient
+{
+public:
+    void Init();
+    void Finalize();
+
+    PRUint32 ID() const { return mID; }
+
+    void   AddName(const char *name);
+    PRBool DelName(const char *name);
+    PRBool HasName(const char *name) const { return mNames.Find(name) != NULL; }
+
+    void   AddTarget(const nsID &target);
+    PRBool DelTarget(const nsID &target);
+    PRBool HasTarget(const nsID &target) const { return mTargets.Find(target) != NULL; }
+
+    // list iterators
+    const ipcStringNode *Names()   const { return mNames.First(); }
+    const ipcIDNode     *Targets() const { return mTargets.First(); }
+
+    // returns primary client name (the one specified in the "client hello" message)
+    const char *PrimaryName() const { return mNames.First() ? mNames.First()->Value() : NULL; }
+
+    void   SetExpectsSyncReply(PRBool val) { mExpectsSyncReply = val; }
+    PRBool GetExpectsSyncReply() const     { return mExpectsSyncReply; }
+
+#ifdef XP_WIN
+    PRUint32 PID() const { return mPID; }
+    void SetPID(PRUint32 pid) { mPID = pid; }
+
+    HWND Hwnd() const { return mHwnd; }
+    void SetHwnd(HWND hwnd) { mHwnd = hwnd; }
+#endif
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+    //
+    // called to process a client file descriptor.  the value of pollFlags
+    // indicates the state of the socket.
+    //
+    // returns:
+    //   0             - to cancel client connection
+    //   PR_POLL_READ  - to poll for a readable socket
+    //   PR_POLL_WRITE - to poll for a writable socket
+    //   (both flags)  - to poll for either a readable or writable socket
+    //
+    // the socket is non-blocking.
+    //
+    int Process(PRFileDesc *sockFD, int pollFlags);
+
+    //
+    // on success or failure, this function takes ownership of |msg| and will
+    // delete it when appropriate.
+    //
+    void EnqueueOutboundMsg(ipcMessage *msg) { mOutMsgQ.Append(msg); }
+#endif
+
+private:
+    static PRUint32 gLastID;
+
+    PRUint32      mID;
+    ipcStringList mNames;
+    ipcIDList     mTargets;
+    PRBool        mExpectsSyncReply;
+
+#ifdef XP_WIN
+    // on windows, we store the PID of the client process to help us determine
+    // the client from which a message originated.  each message has the PID
+    // encoded in it.
+    PRUint32      mPID;
+
+    // the hwnd of the client's message window.
+    HWND          mHwnd;
+#endif
+
+#if defined(XP_UNIX) || defined(XP_OS2)
+    ipcMessage    mInMsg;    // buffer for incoming message
+    ipcMessageQ   mOutMsgQ;  // outgoing message queue
+
+    // keep track of the amount of the first message sent
+    PRUint32      mSendOffset;
+
+    // utility function for writing out messages.
+    int WriteMsgs(PRFileDesc *fd);
+#endif
+};
+
+#endif // !ipcClientUnix_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcCommandModule.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcCommandModule.cpp
new file mode 100644
index 00000000..43ac547c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcCommandModule.cpp
@@ -0,0 +1,316 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include <string.h>
+#include "ipcLog.h"
+#include "ipcCommandModule.h"
+#include "ipcModule.h"
+#include "ipcClient.h"
+#include "ipcMessage.h"
+#include "ipcMessageUtils.h"
+#include "ipcModuleReg.h"
+#include "ipcd.h"
+#include "ipcm.h"
+
+struct ipcCommandModule
+{
+    typedef void (* MsgHandler)(ipcClient *, const ipcMessage *);
+
+    //
+    // helpers
+    //
+
+    static char **
+    BuildStringArray(const ipcStringNode *nodes)
+    {
+        size_t count = 0;
+
+        const ipcStringNode *node;
+
+        for (node = nodes; node; node = node->mNext)
+            count++;
+
+        char **strs = (char **) malloc((count + 1) * sizeof(char *));
+        if (!strs)
+            return NULL;
+
+        count = 0;
+        for (node = nodes; node; node = node->mNext, ++count)
+            strs[count] = (char *) node->Value();
+        strs[count] = 0;
+
+        return strs;
+    }
+
+    static nsID **
+    BuildIDArray(const ipcIDNode *nodes)
+    {
+        size_t count = 0;
+
+        const ipcIDNode *node;
+
+        for (node = nodes; node; node = node->mNext)
+            count++;
+
+        nsID **ids = (nsID **) calloc(count + 1, sizeof(nsID *));
+        if (!ids)
+            return NULL;
+
+        count = 0;
+        for (node = nodes; node; node = node->mNext, ++count)
+            ids[count] = (nsID *) &node->Value();
+
+        return ids;
+    }
+
+    //
+    // message handlers
+    //
+
+    static void
+    OnPing(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got PING\n"));
+
+        IPC_SendMsg(client, new ipcmMessageResult(IPCM_GetRequestIndex(rawMsg), IPCM_OK));
+    }
+
+    static void
+    OnClientHello(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got CLIENT_HELLO\n"));
+
+        IPC_SendMsg(client, new ipcmMessageClientID(IPCM_GetRequestIndex(rawMsg), client->ID()));
+
+        //
+        // NOTE: it would almost make sense for this notification to live
+        // in the transport layer code.  however, clients expect to receive
+        // a CLIENT_ID as the first message following a CLIENT_HELLO, so we
+        // must not allow modules to see a client until after we have sent
+        // the CLIENT_ID message.
+        //
+        IPC_NotifyClientUp(client);
+    }
+
+    static void
+    OnClientAddName(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got CLIENT_ADD_NAME\n"));
+
+        PRInt32 status = IPCM_OK;
+        PRUint32 requestIndex = IPCM_GetRequestIndex(rawMsg);
+
+        ipcMessageCast<ipcmMessageClientAddName> msg(rawMsg);
+        const char *name = msg->Name();
+        if (name) {
+            ipcClient *result = IPC_GetClientByName(msg->Name());
+            if (result) {
+                LOG(("  client with such name already exists (ID = %d)\n", result->ID()));
+                status = IPCM_ERROR_ALREADY_EXISTS;
+            }
+            else
+                client->AddName(name);
+        }
+        else
+            status = IPCM_ERROR_INVALID_ARG;
+
+        IPC_SendMsg(client, new ipcmMessageResult(requestIndex, status));
+    }
+
+    static void
+    OnClientDelName(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got CLIENT_DEL_NAME\n"));
+
+        PRInt32 status = IPCM_OK;
+        PRUint32 requestIndex = IPCM_GetRequestIndex(rawMsg);
+
+        ipcMessageCast<ipcmMessageClientDelName> msg(rawMsg);
+        const char *name = msg->Name();
+        if (name) {
+            if (!client->DelName(name)) {
+                LOG(("  client doesn't have name '%s'\n", name));
+                status = IPCM_ERROR_NO_SUCH_DATA;
+            }
+        }
+        else
+            status = IPCM_ERROR_INVALID_ARG;
+
+        IPC_SendMsg(client, new ipcmMessageResult(requestIndex, status));
+    }
+
+    static void
+    OnClientAddTarget(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got CLIENT_ADD_TARGET\n"));
+
+        PRInt32 status = IPCM_OK;
+        PRUint32 requestIndex = IPCM_GetRequestIndex(rawMsg);
+
+        ipcMessageCast<ipcmMessageClientAddTarget> msg(rawMsg);
+        if (client->HasTarget(msg->Target())) {
+            LOG(("  target already defined for client\n"));
+            status = IPCM_ERROR_ALREADY_EXISTS;
+        }
+        else
+            client->AddTarget(msg->Target());
+
+        IPC_SendMsg(client, new ipcmMessageResult(requestIndex, status));
+    }
+
+    static void
+    OnClientDelTarget(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got CLIENT_DEL_TARGET\n"));
+
+        PRInt32 status = IPCM_OK;
+        PRUint32 requestIndex = IPCM_GetRequestIndex(rawMsg);
+
+        ipcMessageCast<ipcmMessageClientDelTarget> msg(rawMsg);
+        if (!client->DelTarget(msg->Target())) {
+            LOG(("  client doesn't have the given target\n"));
+            status = IPCM_ERROR_NO_SUCH_DATA;
+        }
+
+        IPC_SendMsg(client, new ipcmMessageResult(requestIndex, status));
+    }
+
+    static void
+    OnQueryClientByName(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got QUERY_CLIENT_BY_NAME\n"));
+
+        PRUint32 requestIndex = IPCM_GetRequestIndex(rawMsg);
+
+        ipcMessageCast<ipcmMessageQueryClientByName> msg(rawMsg);
+
+        ipcClient *result = IPC_GetClientByName(msg->Name());
+        if (result) {
+            LOG(("  client exists w/ ID = %u\n", result->ID()));
+            IPC_SendMsg(client, new ipcmMessageClientID(requestIndex, result->ID()));
+        }
+        else {
+            LOG(("  client does not exist\n"));
+            IPC_SendMsg(client, new ipcmMessageResult(requestIndex, IPCM_ERROR_NO_CLIENT));
+        }
+    }
+
+#if 0
+    static void
+    OnQueryClientInfo(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got QUERY_CLIENT_INFO\n"));
+
+        ipcMessageCast<ipcmMessageQueryClientInfo> msg(rawMsg);
+        ipcClient *result = IPC_GetClientByID(msg->ClientID());
+        if (result) {
+            char **names = BuildStringArray(result->Names());
+            nsID **targets = BuildIDArray(result->Targets());
+
+            IPC_SendMsg(client, new ipcmMessageClientInfo(result->ID(),
+                                                          msg->RequestIndex(),
+                                                          (const char **) names,
+                                                          (const nsID **) targets));
+
+            free(names);
+            free(targets);
+        }
+        else {
+            LOG(("  client does not exist\n"));
+            IPC_SendMsg(client, new ipcmMessageError(IPCM_ERROR_NO_CLIENT, msg->RequestIndex()));
+        }
+    }
+#endif
+
+    static void
+    OnForward(ipcClient *client, const ipcMessage *rawMsg)
+    {
+        LOG(("got FORWARD\n"));
+
+        ipcMessageCast<ipcmMessageForward> msg(rawMsg);
+
+        ipcClient *dest = IPC_GetClientByID(msg->ClientID());
+        if (!dest) {
+            LOG(("  destination client not found!\n"));
+            IPC_SendMsg(client, new ipcmMessageResult(IPCM_GetRequestIndex(rawMsg), IPCM_ERROR_NO_CLIENT));
+            return;
+        }
+        // inform client that its message will be forwarded
+        IPC_SendMsg(client, new ipcmMessageResult(IPCM_GetRequestIndex(rawMsg), IPCM_OK));
+
+        ipcMessage *newMsg = new ipcmMessageForward(IPCM_MSG_PSH_FORWARD,
+                                                    client->ID(),
+                                                    msg->InnerTarget(),
+                                                    msg->InnerData(),
+                                                    msg->InnerDataLen());
+        IPC_SendMsg(dest, newMsg);
+    }
+};
+
+void
+IPCM_HandleMsg(ipcClient *client, const ipcMessage *rawMsg)
+{
+    static ipcCommandModule::MsgHandler handlers[] =
+    {
+        ipcCommandModule::OnPing,
+        ipcCommandModule::OnForward,
+        ipcCommandModule::OnClientHello,
+        ipcCommandModule::OnClientAddName,
+        ipcCommandModule::OnClientDelName,
+        ipcCommandModule::OnClientAddTarget,
+        ipcCommandModule::OnClientDelTarget,
+        ipcCommandModule::OnQueryClientByName
+    };
+
+    int type = IPCM_GetType(rawMsg);
+    LOG(("IPCM_HandleMsg [type=%x]\n", type));
+
+    if (!(type & IPCM_MSG_CLASS_REQ)) {
+        LOG(("not a request -- ignoring message\n"));
+        return;
+    }
+
+    type &= ~IPCM_MSG_CLASS_REQ;
+    type--;
+    if (type < 0 || type >= (int) (sizeof(handlers)/sizeof(handlers[0]))) {
+        LOG(("unknown request -- ignoring message\n"));
+        return;
+    }
+
+    (handlers[type])(client, rawMsg);
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcCommandModule.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcCommandModule.h
new file mode 100644
index 00000000..ea146cdc
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcCommandModule.h
@@ -0,0 +1,48 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcCommandModule_h__
+#define ipcCommandModule_h__
+
+#include "ipcm.h" // for IPCM_TARGET
+
+class ipcClient;
+class ipcMessage;
+
+void IPCM_HandleMsg(ipcClient *, const ipcMessage *);
+
+#endif // !ipcCommandModule_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcModuleReg.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcModuleReg.cpp
new file mode 100644
index 00000000..09e60ab9
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcModuleReg.cpp
@@ -0,0 +1,245 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "prlink.h"
+#include "prio.h"
+#include "prlog.h"
+#include "plstr.h"
+
+#include "ipcConfig.h"
+#include "ipcLog.h"
+#include "ipcModuleReg.h"
+#include "ipcModule.h"
+#include "ipcCommandModule.h"
+#include "ipcd.h"
+
+//-----------------------------------------------------------------------------
+
+struct ipcModuleRegEntry
+{
+    nsID              target;
+    ipcModuleMethods *methods;
+    PRLibrary        *lib;
+};
+
+#define IPC_MAX_MODULE_COUNT 64
+
+static ipcModuleRegEntry ipcModules[IPC_MAX_MODULE_COUNT];
+static int ipcModuleCount = 0;
+
+//-----------------------------------------------------------------------------
+
+static PRStatus
+AddModule(const nsID &target, ipcModuleMethods *methods, const char *libPath)
+{
+    if (ipcModuleCount == IPC_MAX_MODULE_COUNT) {
+        LOG(("too many modules!\n"));
+        return PR_FAILURE;
+    }
+
+    if (!methods) {
+        PR_NOT_REACHED("null module methods");
+        return PR_FAILURE;
+    }
+
+    //
+    // each ipcModuleRegEntry holds a reference to a PRLibrary, and on
+    // shutdown, each PRLibrary reference will be released.  this ensures
+    // that the library will not be unloaded until all of the modules in
+    // that library are shutdown.
+    //
+    ipcModules[ipcModuleCount].target = target;
+    ipcModules[ipcModuleCount].methods = methods;
+    ipcModules[ipcModuleCount].lib = PR_LoadLibrary(libPath);
+
+    ++ipcModuleCount;
+    return PR_SUCCESS;
+}
+
+static void
+InitModuleFromLib(const char *modulesDir, const char *fileName)
+{
+    LOG(("InitModuleFromLib [%s]\n", fileName));
+
+    static const ipcDaemonMethods gDaemonMethods =
+    {
+        IPC_DAEMON_METHODS_VERSION,
+        IPC_DispatchMsg,
+        IPC_SendMsg,
+        IPC_GetClientByID,
+        IPC_GetClientByName,
+        IPC_EnumClients,
+        IPC_GetClientID,
+        IPC_ClientHasName,
+        IPC_ClientHasTarget,
+        IPC_EnumClientNames,
+        IPC_EnumClientTargets
+    };
+
+    int dLen = strlen(modulesDir);
+    int fLen = strlen(fileName);
+
+    char *buf = (char *) malloc(dLen + 1 + fLen + 1);
+    memcpy(buf, modulesDir, dLen);
+    buf[dLen] = IPC_PATH_SEP_CHAR;
+    memcpy(buf + dLen + 1, fileName, fLen);
+    buf[dLen + 1 + fLen] = '\0';
+
+    PRLibrary *lib = PR_LoadLibrary(buf);
+    if (lib) {
+        ipcGetModulesFunc func =
+            (ipcGetModulesFunc) PR_FindFunctionSymbol(lib, "IPC_GetModules");
+
+        LOG(("  func=%p\n", (void*) func));
+
+        if (func) {
+            const ipcModuleEntry *entries = NULL;
+            int count = func(&gDaemonMethods, &entries);
+            for (int i=0; i<count; ++i) {
+                if (AddModule(entries[i].target, entries[i].methods, buf) == PR_SUCCESS) {
+                    if (entries[i].methods->init)
+                        entries[i].methods->init();
+                }
+            }
+        }
+        PR_UnloadLibrary(lib);
+    }
+
+    free(buf);
+}
+
+//-----------------------------------------------------------------------------
+// ipcModuleReg API
+//-----------------------------------------------------------------------------
+
+void
+IPC_InitModuleReg(const char *exePath)
+{
+    if (!(exePath && *exePath))
+        return;
+
+    //
+    // register plug-in modules
+    //
+    char *p = PL_strrchr(exePath, IPC_PATH_SEP_CHAR);
+    if (p == NULL) {
+        LOG(("unexpected exe path\n"));
+        return;
+    }
+
+    int baseLen = p - exePath;
+    int finalLen = baseLen + 1 + sizeof(IPC_MODULES_DIR);
+
+    // build full path to ipc modules
+    char *modulesDir = (char*) malloc(finalLen);
+    memcpy(modulesDir, exePath, baseLen);
+    modulesDir[baseLen] = IPC_PATH_SEP_CHAR;
+    memcpy(modulesDir + baseLen + 1, IPC_MODULES_DIR, sizeof(IPC_MODULES_DIR));
+
+    LOG(("loading libraries in %s\n", modulesDir));
+    // 
+    // scan directory for IPC modules
+    //
+    PRDir *dir = PR_OpenDir(modulesDir);
+    if (dir) {
+        PRDirEntry *ent;
+        while ((ent = PR_ReadDir(dir, PR_SKIP_BOTH)) != NULL) {
+            // 
+            // locate extension, and check if dynamic library
+            //
+
+            const char *p = strrchr(ent->name, '.');
+            if (p && PL_strcasecmp(p, MOZ_DLL_SUFFIX) == 0)
+                InitModuleFromLib(modulesDir, ent->name);
+        }
+        PR_CloseDir(dir);
+    }
+
+    free(modulesDir);
+}
+
+void
+IPC_ShutdownModuleReg()
+{
+    //
+    // shutdown modules in reverse order    
+    //
+    while (ipcModuleCount) {
+        ipcModuleRegEntry &entry = ipcModules[--ipcModuleCount];
+        if (entry.methods->shutdown)
+            entry.methods->shutdown();
+        if (entry.lib)
+            PR_UnloadLibrary(entry.lib);
+    }
+}
+
+void
+IPC_NotifyModulesClientUp(ipcClient *client)
+{
+    for (int i = 0; i < ipcModuleCount; ++i) {
+        ipcModuleRegEntry &entry = ipcModules[i];
+        if (entry.methods->clientUp)
+            entry.methods->clientUp(client);
+    }
+}
+
+void
+IPC_NotifyModulesClientDown(ipcClient *client)
+{
+    for (int i = 0; i < ipcModuleCount; ++i) {
+        ipcModuleRegEntry &entry = ipcModules[i];
+        if (entry.methods->clientDown)
+            entry.methods->clientDown(client);
+    }
+}
+
+PRStatus
+IPC_DispatchMsg(ipcClient *client, const nsID &target, const void *data, PRUint32 dataLen)
+{
+    // dispatch message to every module registered under the given target.
+    for (int i=0; i<ipcModuleCount; ++i) {
+        ipcModuleRegEntry &entry = ipcModules[i];
+        if (entry.target.Equals(target)) {
+            if (entry.methods->handleMsg)
+                entry.methods->handleMsg(client, target, data, dataLen);
+        }
+    }
+    return PR_SUCCESS;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcModuleReg.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcModuleReg.h
new file mode 100644
index 00000000..d3fecd6c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcModuleReg.h
@@ -0,0 +1,70 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcModuleReg_h__
+#define ipcModuleReg_h__
+
+#include "ipcModule.h"
+
+//
+// called to init the module registry.  this may only be called once at
+// startup or once after calling IPC_ShutdownModuleReg.
+//
+// params:
+//   exePath - path to the daemon executable.  modules are loaded from a
+//             directory relative to the daemon executable.
+//
+void IPC_InitModuleReg(const char *exePath);
+
+//
+// called to shutdown the module registry.  this may be called more than
+// once and need not follow a call to IPC_InitModuleReg.
+//
+void IPC_ShutdownModuleReg();
+
+//
+// returns the ipcModuleMethods for the given target.
+//
+ipcModuleMethods *IPC_GetModuleByTarget(const nsID &target);
+
+//
+// notifies all modules of client connect/disconnect
+//
+void IPC_NotifyModulesClientUp(ipcClient *);
+void IPC_NotifyModulesClientDown(ipcClient *);
+
+#endif // !ipcModuleReg_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcd.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcd.cpp
new file mode 100644
index 00000000..60aca34a
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcd.cpp
@@ -0,0 +1,235 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "prlog.h"
+#include "prio.h"
+
+#include "ipcConfig.h"
+#include "ipcLog.h"
+#include "ipcMessage.h"
+#include "ipcClient.h"
+#include "ipcModuleReg.h"
+#include "ipcModule.h"
+#include "ipcCommandModule.h"
+#include "ipcdPrivate.h"
+#include "ipcd.h"
+
+//-----------------------------------------------------------------------------
+
+void
+IPC_NotifyParent()
+{
+    PRFileDesc *fd = PR_GetInheritedFD(IPC_STARTUP_PIPE_NAME);
+    if (fd) {
+        char c = IPC_STARTUP_PIPE_MAGIC;
+        PR_Write(fd, &c, 1);
+        PR_Close(fd);
+    }
+}
+
+//-----------------------------------------------------------------------------
+
+PRStatus
+IPC_DispatchMsg(ipcClient *client, const ipcMessage *msg)
+{
+    PR_ASSERT(client);
+    PR_ASSERT(msg);
+
+    // remember if client is expecting SYNC_REPLY.  we'll add that flag to the
+    // next message sent to the client.
+    if (msg->TestFlag(IPC_MSG_FLAG_SYNC_QUERY)) {
+        PR_ASSERT(client->GetExpectsSyncReply() == PR_FALSE);
+        // XXX shouldn't we remember the TargetID as well, and only set the
+        //     SYNC_REPLY flag on the next message sent to the same TargetID?
+        client->SetExpectsSyncReply(PR_TRUE);
+    }
+
+    if (msg->Target().Equals(IPCM_TARGET)) {
+        IPCM_HandleMsg(client, msg);
+        return PR_SUCCESS;
+    }
+
+    return IPC_DispatchMsg(client, msg->Target(), msg->Data(), msg->DataLen());
+}
+
+PRStatus
+IPC_SendMsg(ipcClient *client, ipcMessage *msg)
+{
+    PR_ASSERT(msg);
+
+    if (client == NULL) {
+        //
+        // broadcast
+        //
+        for (int i=0; i<ipcClientCount; ++i)
+            IPC_SendMsg(&ipcClients[i], msg->Clone());
+        delete msg;
+        return PR_SUCCESS;
+    }
+
+    // add SYNC_REPLY flag to message if client is expecting...
+    if (client->GetExpectsSyncReply()) {
+        msg->SetFlag(IPC_MSG_FLAG_SYNC_REPLY);
+        client->SetExpectsSyncReply(PR_FALSE);
+    }
+
+    if (client->HasTarget(msg->Target()))
+        return IPC_PlatformSendMsg(client, msg);
+
+    LOG(("  no registered message handler\n"));
+    return PR_FAILURE;
+}
+
+void
+IPC_NotifyClientUp(ipcClient *client)
+{
+    LOG(("IPC_NotifyClientUp: clientID=%d\n", client->ID()));
+
+    // notify modules before other clients
+    IPC_NotifyModulesClientUp(client);
+
+    for (int i=0; i<ipcClientCount; ++i) {
+        if (&ipcClients[i] != client)
+            IPC_SendMsg(&ipcClients[i],
+                new ipcmMessageClientState(client->ID(), IPCM_CLIENT_STATE_UP));
+    }
+}
+
+void
+IPC_NotifyClientDown(ipcClient *client)
+{
+    LOG(("IPC_NotifyClientDown: clientID=%d\n", client->ID()));
+
+    // notify modules before other clients
+    IPC_NotifyModulesClientDown(client);
+
+    for (int i=0; i<ipcClientCount; ++i) {
+        if (&ipcClients[i] != client)
+            IPC_SendMsg(&ipcClients[i],
+                new ipcmMessageClientState(client->ID(), IPCM_CLIENT_STATE_DOWN));
+    }
+}
+
+//-----------------------------------------------------------------------------
+// IPC daemon methods
+//-----------------------------------------------------------------------------
+
+PRStatus
+IPC_SendMsg(ipcClient *client, const nsID &target, const void *data, PRUint32 dataLen)
+{
+    return IPC_SendMsg(client, new ipcMessage(target, (const char *) data, dataLen));
+}
+
+ipcClient *
+IPC_GetClientByID(PRUint32 clientID)
+{
+    // linear search OK since number of clients should be small
+    for (int i = 0; i < ipcClientCount; ++i) {
+        if (ipcClients[i].ID() == clientID)
+            return &ipcClients[i];
+    }
+    return NULL;
+}
+
+ipcClient *
+IPC_GetClientByName(const char *name)
+{
+    // linear search OK since number of clients should be small
+    for (int i = 0; i < ipcClientCount; ++i) {
+        if (ipcClients[i].HasName(name))
+            return &ipcClients[i];
+    }
+    return NULL;
+}
+
+void
+IPC_EnumClients(ipcClientEnumFunc func, void *closure)
+{
+    PR_ASSERT(func);
+    for (int i = 0; i < ipcClientCount; ++i) {
+        if (func(closure, &ipcClients[i], ipcClients[i].ID()) == PR_FALSE)
+            break;
+    }
+}
+
+PRUint32
+IPC_GetClientID(ipcClient *client)
+{
+    PR_ASSERT(client);
+    return client->ID();
+}
+
+PRBool
+IPC_ClientHasName(ipcClient *client, const char *name)
+{
+    PR_ASSERT(client);
+    PR_ASSERT(name);
+    return client->HasName(name);
+}
+
+PRBool
+IPC_ClientHasTarget(ipcClient *client, const nsID &target)
+{
+    PR_ASSERT(client);
+    return client->HasTarget(target);
+}
+
+void
+IPC_EnumClientNames(ipcClient *client, ipcClientNameEnumFunc func, void *closure)
+{
+    PR_ASSERT(client);
+    PR_ASSERT(func);
+    const ipcStringNode *node = client->Names();
+    while (node) {
+        if (func(closure, client, node->Value()) == PR_FALSE)
+            break;
+        node = node->mNext;
+    }
+}
+
+void
+IPC_EnumClientTargets(ipcClient *client, ipcClientTargetEnumFunc func, void *closure)
+{
+    PR_ASSERT(client);
+    PR_ASSERT(func);
+    const ipcIDNode *node = client->Targets();
+    while (node) {
+        if (func(closure, client, node->Value()) == PR_FALSE)
+            break;
+        node = node->mNext;
+    }
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcd.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcd.h
new file mode 100644
index 00000000..5a0f2c2a
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcd.h
@@ -0,0 +1,82 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef IPCD_H__
+#define IPCD_H__
+
+#include "ipcModule.h"
+#include "ipcMessage.h"
+
+//-----------------------------------------------------------------------------
+// IPC daemon methods (see struct ipcDaemonMethods)
+//
+// these functions may only be called directly from within the daemon.  plug-in
+// modules must access these through the ipcDaemonMethods structure.
+//-----------------------------------------------------------------------------
+
+PRStatus        IPC_DispatchMsg          (ipcClientHandle client, const nsID &target, const void *data, PRUint32 dataLen);
+PRStatus        IPC_SendMsg              (ipcClientHandle client, const nsID &target, const void *data, PRUint32 dataLen);
+ipcClientHandle IPC_GetClientByID        (PRUint32 id);
+ipcClientHandle IPC_GetClientByName      (const char *name);
+void            IPC_EnumClients          (ipcClientEnumFunc func, void *closure);
+PRUint32        IPC_GetClientID          (ipcClientHandle client);
+PRBool          IPC_ClientHasName        (ipcClientHandle client, const char *name);
+PRBool          IPC_ClientHasTarget      (ipcClientHandle client, const nsID &target);
+void            IPC_EnumClientNames      (ipcClientHandle client, ipcClientNameEnumFunc func, void *closure);
+void            IPC_EnumClientTargets    (ipcClientHandle client, ipcClientTargetEnumFunc func, void *closure);
+
+//-----------------------------------------------------------------------------
+// other internal IPCD methods
+//-----------------------------------------------------------------------------
+
+//
+// dispatch message
+//
+PRStatus IPC_DispatchMsg(ipcClientHandle client, const ipcMessage *msg);
+
+//
+// send message, takes ownership of |msg|.
+//
+PRStatus IPC_SendMsg(ipcClientHandle client, ipcMessage *msg);
+
+//
+// dispatch notifications about client connects and disconnects
+//
+void IPC_NotifyClientUp(ipcClientHandle client);
+void IPC_NotifyClientDown(ipcClientHandle client);
+
+#endif // !IPCD_H__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdPrivate.h b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdPrivate.h
new file mode 100644
index 00000000..023b3a03
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdPrivate.h
@@ -0,0 +1,65 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcdPrivate_h__
+#define ipcdPrivate_h__
+
+class ipcClient;
+
+//
+// upper limit on the number of active connections
+// XXX may want to make this more dynamic
+//
+#define IPC_MAX_CLIENTS 10000
+
+//
+// array of connected clients
+//
+extern ipcClient *ipcClients;
+extern int        ipcClientCount;
+
+//
+// platform specific send message function, takes ownership of |msg|.
+//
+PRStatus IPC_PlatformSendMsg(ipcClient  *client, ipcMessage *msg);
+
+//
+// notify parent that it can connect to the daemon.
+//
+void IPC_NotifyParent();
+
+#endif // !ipcdPrivate_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdStub.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdStub.cpp
new file mode 100644
index 00000000..10618110
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdStub.cpp
@@ -0,0 +1,77 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by IBM Corporation are Copyright (C) 2003
+ * IBM Corporation. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcd.h"
+#include "ipcdPrivate.h"
+#include "ipcLog.h"
+
+#include "prerror.h"
+
+//-----------------------------------------------------------------------------
+// use this file as a template to add server-side IPC connectivity.
+// 
+// NOTE: if your platform supports local domain TCP sockets, then you should
+//       be able to make use of ipcConnectionUnix.cpp.
+//-----------------------------------------------------------------------------
+
+// these variables are declared in ipcdPrivate.h and must be initialized by
+// when the daemon starts up.
+ipcClient *ipcClients = NULL;
+int        ipcClientCount = 0;
+
+PRStatus
+IPC_PlatformSendMsg(ipcClient  *client, ipcMessage *msg)
+{
+    const char notimplemented[] = "IPC_PlatformSendMsg not implemented";
+    PR_SetErrorText(sizeof(notimplemented), notimplemented);
+    return PR_FAILURE;
+}
+
+int main(int argc, char **argv)
+{
+    IPC_InitLog("###");
+
+    LOG(("daemon started...\n"));
+
+    /*
+    IPC_InitModuleReg(argv[0]);
+    IPC_ShutdownModuleReg();
+    */
+
+    // let the parent process know that we are up-and-running
+    IPC_NotifyParent();
+    return 0;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdUnix.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdUnix.cpp
new file mode 100644
index 00000000..026e9e52
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdUnix.cpp
@@ -0,0 +1,600 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if defined(VBOX) && !defined(XP_OS2)
+# include <sys/resource.h>
+# include <errno.h>
+#endif
+
+#ifdef VBOX
+# include <iprt/initterm.h>
+#endif
+
+#include "prio.h"
+#include "prerror.h"
+#include "prthread.h"
+#include "prinrval.h"
+#include "plstr.h"
+#include "prprf.h"
+
+#include "ipcConfig.h"
+#include "ipcLog.h"
+#include "ipcMessage.h"
+#include "ipcClient.h"
+#include "ipcModuleReg.h"
+#include "ipcdPrivate.h"
+#include "ipcd.h"
+
+#if 0
+static void
+IPC_Sleep(int seconds)
+{
+    while (seconds > 0) {
+        LOG(("\rsleeping for %d seconds...", seconds));
+        PR_Sleep(PR_SecondsToInterval(1));
+        --seconds;
+    }
+    LOG(("\ndone sleeping\n"));
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// ipc directory and locking...
+//-----------------------------------------------------------------------------
+
+//
+// advisory file locking is used to ensure that only one IPC daemon is active
+// and bound to the local domain socket at a time.
+//
+// XXX this code does not work on OS/2.
+//
+#if !defined(XP_OS2)
+#define IPC_USE_FILE_LOCK
+#endif
+
+#ifdef IPC_USE_FILE_LOCK
+
+enum Status
+{
+    EOk = 0,
+    ELockFileOpen = -1,
+    ELockFileLock = -2,
+    ELockFileOwner = -3,
+};
+
+static int ipcLockFD = 0;
+
+static Status AcquireDaemonLock(const char *baseDir)
+{
+    const char lockName[] = "lock";
+
+    int dirLen = strlen(baseDir);
+    int len = dirLen            // baseDir
+            + 1                 // "/"
+            + sizeof(lockName); // "lock"
+
+    char *lockFile = (char *) malloc(len);
+    memcpy(lockFile, baseDir, dirLen);
+    lockFile[dirLen] = '/';
+    memcpy(lockFile + dirLen + 1, lockName, sizeof(lockName));
+
+#ifdef VBOX
+    //
+    // Security checks for the directory
+    //
+    struct stat st;
+    if (stat(baseDir, &st) == -1)
+    {
+        printf("Cannot stat '%s'.\n", baseDir);
+        return ELockFileOwner;
+    }
+
+    if (st.st_uid != getuid() && st.st_uid != geteuid())
+    {
+        printf("Wrong owner (%d) of '%s'", st.st_uid, baseDir);
+        if (   !stat("/tmp", &st)
+            && (st.st_mode & 07777) != 01777)
+            printf(" -- check /tmp permissions (%o should be 1777)\n",
+                    st.st_mode & 07777);
+        printf(".\n");
+        return ELockFileOwner;
+    }
+
+    if (st.st_mode != (S_IRUSR | S_IWUSR | S_IXUSR | S_IFDIR))
+    {
+        printf("Wrong mode (%o) of '%s'", st.st_mode, baseDir);
+        if (   !stat("/tmp", &st)
+            && (st.st_mode & 07777) != 01777)
+            printf(" -- check /tmp permissions (%o should be 1777)\n",
+                    st.st_mode & 07777);
+        printf(".\n");
+        return ELockFileOwner;
+    }
+#endif
+
+    //
+    // open lock file.  it remains open until we shutdown.
+    //
+    ipcLockFD = open(lockFile, O_WRONLY|O_CREAT, S_IWUSR|S_IRUSR);
+
+#ifndef VBOX
+    free(lockFile);
+#endif
+
+    if (ipcLockFD == -1)
+        return ELockFileOpen;
+
+#ifdef VBOX
+    //
+    // Security checks for the lock file
+    //
+    if (fstat(ipcLockFD, &st) == -1)
+    {
+        printf("Cannot stat '%s'.\n", lockFile);
+        free(lockFile);
+        return ELockFileOwner;
+    }
+
+    if (st.st_uid != getuid() && st.st_uid != geteuid())
+    {
+        printf("Wrong owner (%d) of '%s'.\n", st.st_uid, lockFile);
+        free(lockFile);
+        return ELockFileOwner;
+    }
+
+    if (st.st_mode != (S_IRUSR | S_IWUSR | S_IFREG))
+    {
+        printf("Wrong mode (%o) of '%s'.\n", st.st_mode, lockFile);
+        free(lockFile);
+        return ELockFileOwner;
+    }
+
+    free(lockFile);
+#endif
+
+    //
+    // we use fcntl for locking.  assumption: filesystem should be local.
+    // this API is nice because the lock will be automatically released
+    // when the process dies.  it will also be released when the file
+    // descriptor is closed.
+    //
+    struct flock lock;
+    lock.l_type = F_WRLCK;
+    lock.l_start = 0;
+    lock.l_len = 0;
+    lock.l_whence = SEEK_SET;
+    if (fcntl(ipcLockFD, F_SETLK, &lock) == -1)
+        return ELockFileLock;
+
+    //
+    // truncate lock file once we have exclusive access to it.
+    //
+    ftruncate(ipcLockFD, 0);
+
+    //
+    // write our PID into the lock file (this just seems like a good idea...
+    // no real purpose otherwise).
+    //
+    char buf[32];
+    int nb = PR_snprintf(buf, sizeof(buf), "%u\n", (unsigned long) getpid());
+    write(ipcLockFD, buf, nb);
+
+    return EOk;
+}
+
+static Status InitDaemonDir(const char *socketPath)
+{
+    LOG(("InitDaemonDir [sock=%s]\n", socketPath));
+
+    char *baseDir = PL_strdup(socketPath);
+
+    //
+    // make sure IPC directory exists (XXX this should be recursive)
+    //
+    char *p = strrchr(baseDir, '/');
+    if (p)
+        p[0] = '\0';
+    mkdir(baseDir, 0700);
+
+    //
+    // if we can't acquire the daemon lock, then another daemon
+    // must be active, so bail.
+    //
+    Status status = AcquireDaemonLock(baseDir);
+
+    PL_strfree(baseDir);
+
+    if (status == EOk) {
+        // delete an existing socket to prevent bind from failing.
+        unlink(socketPath);
+    }
+    return status;
+}
+
+static void ShutdownDaemonDir()
+{
+    LOG(("ShutdownDaemonDir\n"));
+
+    // deleting directory and files underneath it allows another process
+    // to think it has exclusive access.  better to just leave the hidden
+    // directory in /tmp and let the OS clean it up via the usual tmpdir
+    // cleanup cron job.
+
+    // this removes the advisory lock, allowing other processes to acquire it.
+    if (ipcLockFD) {
+        close(ipcLockFD);
+        ipcLockFD = 0;
+    }
+}
+
+#endif // IPC_USE_FILE_LOCK
+
+//-----------------------------------------------------------------------------
+// poll list
+//-----------------------------------------------------------------------------
+
+//
+// declared in ipcdPrivate.h
+//
+ipcClient *ipcClients = NULL;
+int        ipcClientCount = 0;
+
+//
+// the first element of this array is always zero; this is done so that the
+// k'th element of ipcClientArray corresponds to the k'th element of
+// ipcPollList.
+//
+static ipcClient ipcClientArray[IPC_MAX_CLIENTS + 1];
+
+//
+// element 0 contains the "server socket"
+//
+static PRPollDesc ipcPollList[IPC_MAX_CLIENTS + 1];
+
+//-----------------------------------------------------------------------------
+
+static int AddClient(PRFileDesc *fd)
+{
+    if (ipcClientCount == IPC_MAX_CLIENTS) {
+        LOG(("reached maximum client limit\n"));
+        return -1;
+    }
+
+    int pollCount = ipcClientCount + 1;
+
+    ipcClientArray[pollCount].Init();
+
+    ipcPollList[pollCount].fd = fd;
+    ipcPollList[pollCount].in_flags = PR_POLL_READ;
+    ipcPollList[pollCount].out_flags = 0;
+
+    ++ipcClientCount;
+    return 0;
+}
+
+static int RemoveClient(int clientIndex)
+{
+    PRPollDesc *pd = &ipcPollList[clientIndex];
+
+    PR_Close(pd->fd);
+
+    ipcClientArray[clientIndex].Finalize();
+
+    //
+    // keep the clients and poll_fds contiguous; move the last one into
+    // the spot held by the one that is going away.
+    //
+    int toIndex = clientIndex;
+    int fromIndex = ipcClientCount;
+    if (fromIndex != toIndex) {
+        memcpy(&ipcClientArray[toIndex], &ipcClientArray[fromIndex], sizeof(ipcClient));
+        memcpy(&ipcPollList[toIndex], &ipcPollList[fromIndex], sizeof(PRPollDesc));
+    }
+
+    //
+    // zero out the old entries.
+    //
+    memset(&ipcClientArray[fromIndex], 0, sizeof(ipcClient));
+    memset(&ipcPollList[fromIndex], 0, sizeof(PRPollDesc));
+
+    --ipcClientCount;
+    return 0;
+}
+
+//-----------------------------------------------------------------------------
+
+static void PollLoop(PRFileDesc *listenFD)
+{
+    // the first element of ipcClientArray is unused.
+    memset(ipcClientArray, 0, sizeof(ipcClientArray));
+    ipcClients = ipcClientArray + 1;
+    ipcClientCount = 0;
+
+    ipcPollList[0].fd = listenFD;
+    ipcPollList[0].in_flags = PR_POLL_EXCEPT | PR_POLL_READ;
+
+    while (1) {
+        PRInt32 rv;
+        PRIntn i;
+
+        int pollCount = ipcClientCount + 1;
+
+        ipcPollList[0].out_flags = 0;
+
+        //
+        // poll
+        //
+        // timeout after 5 minutes.  if no connections after timeout, then
+        // exit.  this timeout ensures that we don't stay resident when no
+        // clients are interested in connecting after spawning the daemon.
+        //
+        // XXX add #define for timeout value
+        //
+        LOG(("calling PR_Poll [pollCount=%d]\n", pollCount));
+        rv = PR_Poll(ipcPollList, pollCount, PR_SecondsToInterval(60 * 5));
+        if (rv == -1) {
+            LOG(("PR_Poll failed [%d]\n", PR_GetError()));
+            return;
+        }
+
+        if (rv > 0) {
+            //
+            // process clients that are ready
+            //
+            for (i = 1; i < pollCount; ++i) {
+                if (ipcPollList[i].out_flags != 0) {
+                    ipcPollList[i].in_flags =
+                        ipcClientArray[i].Process(ipcPollList[i].fd,
+                                                  ipcPollList[i].out_flags);
+                    ipcPollList[i].out_flags = 0;
+                }
+            }
+
+            //
+            // cleanup any dead clients (indicated by a zero in_flags)
+            //
+            for (i = pollCount - 1; i >= 1; --i) {
+                if (ipcPollList[i].in_flags == 0)
+                    RemoveClient(i);
+            }
+
+            //
+            // check for new connection
+            //
+            if (ipcPollList[0].out_flags & PR_POLL_READ) {
+                LOG(("got new connection\n"));
+
+                PRNetAddr clientAddr;
+                memset(&clientAddr, 0, sizeof(clientAddr));
+                PRFileDesc *clientFD;
+
+                // @todo : We need to handle errors from accept() especially something like
+                //          EMFILE, which happens when we run out of file descriptors.
+                //          and puts XPCOMIPCD in a poll/accept endless loop!
+                clientFD = PR_Accept(listenFD, &clientAddr, PR_INTERVAL_NO_WAIT);
+                if (clientFD == NULL) {
+                    // ignore this error... perhaps the client disconnected.
+                    LOG(("PR_Accept failed [%d]\n", PR_GetError()));
+                }
+                else {
+                    // make socket non-blocking
+                    PRSocketOptionData opt;
+                    opt.option = PR_SockOpt_Nonblocking;
+                    opt.value.non_blocking = PR_TRUE;
+                    PR_SetSocketOption(clientFD, &opt);
+
+                    if (AddClient(clientFD) != 0)
+                        PR_Close(clientFD);
+                }
+            }
+        }
+
+        //
+        // shutdown if no clients
+        //
+        if (ipcClientCount == 0) {
+            LOG(("shutting down\n"));
+            break;
+        }
+    }
+}
+
+//-----------------------------------------------------------------------------
+
+PRStatus
+IPC_PlatformSendMsg(ipcClient  *client, ipcMessage *msg)
+{
+    LOG(("IPC_PlatformSendMsg\n"));
+
+    //
+    // must copy message onto send queue.
+    //
+    client->EnqueueOutboundMsg(msg);
+
+    //
+    // since our Process method may have already been called, we must ensure
+    // that the PR_POLL_WRITE flag is set.
+    //
+    int clientIndex = client - ipcClientArray;
+    ipcPollList[clientIndex].in_flags |= PR_POLL_WRITE;
+
+    return PR_SUCCESS;
+}
+
+//-----------------------------------------------------------------------------
+
+int main(int argc, char **argv)
+{
+    PRFileDesc *listenFD = NULL;
+    PRNetAddr addr;
+
+#ifdef VBOX
+    /* Set up the runtime without loading the support driver. */
+    RTR3InitExe(argc, &argv, 0);
+#endif
+
+    //
+    // ignore SIGINT so <ctrl-c> from terminal only kills the client
+    // which spawned this daemon.
+    //
+    signal(SIGINT, SIG_IGN);
+    // XXX block others?  check cartman
+
+    // ensure strict file permissions
+    umask(0077);
+
+    IPC_InitLog("###");
+
+    LOG(("daemon started...\n"));
+
+    //XXX uncomment these lines to test slow starting daemon
+    //IPC_Sleep(2);
+
+    // set socket address
+    addr.local.family = PR_AF_LOCAL;
+    if (argc < 2)
+        IPC_GetDefaultSocketPath(addr.local.path, sizeof(addr.local.path));
+    else
+        PL_strncpyz(addr.local.path, argv[1], sizeof(addr.local.path));
+
+#ifdef IPC_USE_FILE_LOCK
+    Status status = InitDaemonDir(addr.local.path);
+    if (status != EOk) {
+        if (status == ELockFileLock) {
+            LOG(("Another daemon is already running, exiting.\n"));
+            // send a signal to the blocked parent to indicate success
+            IPC_NotifyParent();
+            return 0;
+        }
+        else {
+            LOG(("InitDaemonDir failed (status=%d)\n", status));
+            // don't notify the parent to cause it to fail in PR_Read() after
+            // we terminate
+#ifdef VBOX
+            if (status != ELockFileOwner)
+                printf("Cannot create a lock file for '%s'.\n"
+                        "Check permissions.\n", addr.local.path);
+#endif
+            return 0;
+        }
+    }
+#endif
+
+    listenFD = PR_OpenTCPSocket(PR_AF_LOCAL);
+    if (!listenFD) {
+        LOG(("PR_OpenTCPSocket failed [%d]\n", PR_GetError()));
+    }
+    else if (PR_Bind(listenFD, &addr) != PR_SUCCESS) {
+        LOG(("PR_Bind failed [%d]\n", PR_GetError()));
+    }
+    else {
+        IPC_InitModuleReg(argv[0]);
+
+#ifdef VBOX
+        // Use large backlog, as otherwise local sockets can reject connection
+        // attempts. Usually harmless, but causes an unnecessary start attempt
+        // of IPCD (which will terminate straight away), and the next attempt
+        // usually succeeds. But better avoid unnecessary activities.
+        if (PR_Listen(listenFD, 128) != PR_SUCCESS) {
+#else /* !VBOX */
+        if (PR_Listen(listenFD, 5) != PR_SUCCESS) {
+#endif /* !VBOX */
+            LOG(("PR_Listen failed [%d]\n", PR_GetError()));
+        }
+        else {
+#ifndef VBOX
+            // redirect all standard file descriptors to /dev/null for
+            // proper daemonizing
+            PR_Close(PR_STDIN);
+            PR_Open("/dev/null", O_RDONLY, 0);
+            PR_Close(PR_STDOUT);
+            PR_Open("/dev/null", O_WRONLY, 0);
+            PR_Close(PR_STDERR);
+            PR_Open("/dev/null", O_WRONLY, 0);
+#endif
+
+            IPC_NotifyParent();
+
+#if defined(VBOX) && !defined(XP_OS2)
+            // Increase the file table size to 10240 or as high as possible.
+            struct rlimit lim;
+            if (getrlimit(RLIMIT_NOFILE, &lim) == 0)
+            {
+                if (    lim.rlim_cur < 10240
+                    &&  lim.rlim_cur < lim.rlim_max)
+                {
+                    lim.rlim_cur = lim.rlim_max <= 10240 ? lim.rlim_max : 10240;
+                    if (setrlimit(RLIMIT_NOFILE, &lim) == -1)
+                        printf("WARNING: failed to increase file descriptor limit. (%d)\n", errno);
+                }
+            }
+            else
+                printf("WARNING: failed to obtain per-process file-descriptor limit (%d).\n", errno);
+#endif
+
+            PollLoop(listenFD);
+        }
+
+        IPC_ShutdownModuleReg();
+    }
+
+    //IPC_Sleep(5);
+
+#ifdef IPC_USE_FILE_LOCK
+    // it is critical that we release the lock before closing the socket,
+    // otherwise, a client might launch another daemon that would be unable
+    // to acquire the lock and would then leave the client without a daemon.
+
+    ShutdownDaemonDir();
+#endif
+
+    if (listenFD) {
+        LOG(("closing socket\n"));
+        PR_Close(listenFD);
+    }
+
+    return 0;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdWin.cpp b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdWin.cpp
new file mode 100644
index 00000000..f89fba06
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/daemon/src/ipcdWin.cpp
@@ -0,0 +1,408 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <windows.h>
+
+#include "prthread.h"
+
+#include "ipcConfig.h"
+#include "ipcLog.h"
+#include "ipcMessage.h"
+#include "ipcClient.h"
+#include "ipcModuleReg.h"
+#include "ipcdPrivate.h"
+#include "ipcd.h"
+#include "ipcm.h"
+
+//
+// declared in ipcdPrivate.h
+//
+ipcClient *ipcClients = NULL;
+int        ipcClientCount = 0;
+
+static ipcClient ipcClientArray[IPC_MAX_CLIENTS];
+
+static HWND   ipcHwnd = NULL;
+static PRBool ipcShutdown = PR_FALSE;
+
+#define IPC_PURGE_TIMER_ID 1
+#define IPC_WM_SENDMSG  (WM_USER + 1)
+#define IPC_WM_SHUTDOWN (WM_USER + 2)
+
+//-----------------------------------------------------------------------------
+// client array manipulation
+//-----------------------------------------------------------------------------
+
+static void
+RemoveClient(ipcClient *client)
+{
+    LOG(("RemoveClient\n"));
+
+    int clientIndex = client - ipcClientArray;
+
+    client->Finalize();
+
+    //
+    // move last ipcClient object down into the spot occupied by this client.
+    //
+    int fromIndex = ipcClientCount - 1;
+    int toIndex = clientIndex;
+    if (toIndex != fromIndex)
+        memcpy(&ipcClientArray[toIndex], &ipcClientArray[fromIndex], sizeof(ipcClient));
+
+    memset(&ipcClientArray[fromIndex], 0, sizeof(ipcClient));
+
+    --ipcClientCount;
+    LOG(("  num clients = %u\n", ipcClientCount));
+
+    if (ipcClientCount == 0) {
+        LOG(("  shutting down...\n"));
+        KillTimer(ipcHwnd, IPC_PURGE_TIMER_ID);
+        PostQuitMessage(0);
+        ipcShutdown = PR_TRUE;
+    }
+}
+
+static void
+PurgeStaleClients()
+{
+    if (ipcClientCount == 0)
+        return;
+
+    LOG(("PurgeStaleClients [num-clients=%u]\n", ipcClientCount));
+    //
+    // walk the list of supposedly active clients, and verify the existance of
+    // their respective message windows.
+    //
+    char wName[IPC_CLIENT_WINDOW_NAME_MAXLEN];
+    for (int i=ipcClientCount-1; i>=0; --i) {
+        ipcClient *client = &ipcClientArray[i];
+
+        LOG(("  checking client at index %u [client-id=%u pid=%u]\n", 
+            i, client->ID(), client->PID()));
+
+        IPC_GetClientWindowName(client->PID(), wName);
+
+        // XXX dougt has ideas about how to make this better
+
+        HWND hwnd = FindWindow(IPC_CLIENT_WINDOW_CLASS, wName);
+        if (!hwnd) {
+            LOG(("  client window not found; removing client!\n"));
+            RemoveClient(client);
+        }
+    }
+}
+
+static ipcClient *
+AddClient(HWND hwnd, PRUint32 pid)
+{
+    LOG(("AddClient\n"));
+
+    //
+    // before adding a new client, verify that all existing clients are
+    // still up and running.  remove any stale clients.
+    //
+    PurgeStaleClients();
+
+    if (ipcClientCount == IPC_MAX_CLIENTS) {
+        LOG(("  reached maximum client count!\n"));
+        return NULL;
+    }
+
+    ipcClient *client = &ipcClientArray[ipcClientCount];
+    client->Init();
+    client->SetHwnd(hwnd);
+    client->SetPID(pid);    // XXX one function instead of 3
+
+    ++ipcClientCount;
+    LOG(("  num clients = %u\n", ipcClientCount));
+
+    if (ipcClientCount == 1)
+        SetTimer(ipcHwnd, IPC_PURGE_TIMER_ID, 1000, NULL);
+
+    return client;
+}
+
+static ipcClient *
+GetClientByPID(PRUint32 pid)
+{
+    for (int i=0; i<ipcClientCount; ++i) {
+        if (ipcClientArray[i].PID() == pid)
+            return &ipcClientArray[i];
+    }
+    return NULL;
+}
+
+//-----------------------------------------------------------------------------
+// message processing
+//-----------------------------------------------------------------------------
+
+static void
+ProcessMsg(HWND hwnd, PRUint32 pid, const ipcMessage *msg)
+{
+    LOG(("ProcessMsg [pid=%u len=%u]\n", pid, msg->MsgLen()));
+
+    ipcClient *client = GetClientByPID(pid);
+
+    if (client) {
+        //
+        // if this is an IPCM "client hello" message, then reset the client
+        // instance object.
+        //
+        if (msg->Target().Equals(IPCM_TARGET) &&
+            IPCM_GetType(msg) == IPCM_MSG_REQ_CLIENT_HELLO) {
+            RemoveClient(client);
+            client = NULL;
+        }
+    }
+
+    if (client == NULL) {
+        client = AddClient(hwnd, pid);
+        if (!client)
+            return;
+    }
+
+    IPC_DispatchMsg(client, msg);
+}
+
+//-----------------------------------------------------------------------------
+
+PRStatus
+IPC_PlatformSendMsg(ipcClient  *client, ipcMessage *msg)
+{
+    LOG(("IPC_PlatformSendMsg [clientID=%u clientPID=%u]\n",
+        client->ID(), client->PID()));
+
+    // use PostMessage to make this asynchronous; otherwise we might get
+    // some wierd SendMessage recursion between processes.
+
+    WPARAM wParam = (WPARAM) client->Hwnd();
+    LPARAM lParam = (LPARAM) msg;
+    if (!PostMessage(ipcHwnd, IPC_WM_SENDMSG, wParam, lParam)) {
+        LOG(("PostMessage failed\n"));
+        delete msg;
+        return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+}
+
+//-----------------------------------------------------------------------------
+// windows message loop
+//-----------------------------------------------------------------------------
+
+static LRESULT CALLBACK
+WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    LOG(("got message [msg=%x wparam=%x lparam=%x]\n", uMsg, wParam, lParam));
+
+    if (uMsg == WM_COPYDATA) {
+        if (ipcShutdown) {
+            LOG(("ignoring message b/c daemon is shutting down\n"));
+            return TRUE;
+        }
+        COPYDATASTRUCT *cd = (COPYDATASTRUCT *) lParam;
+        if (cd && cd->lpData) {
+            ipcMessage msg;
+            PRUint32 bytesRead;
+            PRBool complete;
+            // XXX avoid extra malloc
+            PRStatus rv = msg.ReadFrom((const char *) cd->lpData, cd->cbData,
+                                       &bytesRead, &complete);
+            if (rv == PR_SUCCESS && complete) {
+                //
+                // grab client PID and hwnd.
+                //
+                ProcessMsg((HWND) wParam, (PRUint32) cd->dwData, &msg);
+            }
+            else
+                LOG(("ignoring malformed message\n"));
+        }
+        return TRUE;
+    }
+
+    if (uMsg == IPC_WM_SENDMSG) {
+        HWND hWndDest = (HWND) wParam;
+        ipcMessage *msg = (ipcMessage *) lParam;
+
+        COPYDATASTRUCT cd;
+        cd.dwData = GetCurrentProcessId();
+        cd.cbData = (DWORD) msg->MsgLen();
+        cd.lpData = (PVOID) msg->MsgBuf();
+
+        LOG(("calling SendMessage...\n"));
+        SendMessage(hWndDest, WM_COPYDATA, (WPARAM) hWnd, (LPARAM) &cd);
+        LOG(("  done.\n"));
+
+        delete msg;
+        return 0;
+    }
+
+    if (uMsg == WM_TIMER) {
+        PurgeStaleClients();
+        return 0;
+    }
+
+#if 0
+    if (uMsg == IPC_WM_SHUTDOWN) {
+        //
+        // since this message is handled asynchronously, it is possible
+        // that other clients may have come online since this was issued.
+        // in which case, we need to ignore this message.
+        //
+        if (ipcClientCount == 0) {
+            ipcShutdown = PR_TRUE;
+            PostQuitMessage(0);
+        }
+        return 0;
+    }
+#endif
+
+    return DefWindowProc(hWnd, uMsg, wParam, lParam);
+}
+
+//-----------------------------------------------------------------------------
+// daemon startup synchronization
+//-----------------------------------------------------------------------------
+
+static HANDLE ipcSyncEvent;
+
+static PRBool
+AcquireLock()
+{
+    ipcSyncEvent = CreateEvent(NULL, FALSE, FALSE,
+                               IPC_SYNC_EVENT_NAME);
+    if (!ipcSyncEvent) {
+        LOG(("CreateEvent failed [%u]\n", GetLastError()));
+        return PR_FALSE;
+    }
+
+    // check to see if event already existed prior to this call.
+    if (GetLastError() == ERROR_ALREADY_EXISTS) {
+        LOG(("  lock already set; exiting...\n"));
+        return PR_FALSE;
+    }
+    
+    LOG(("  acquired lock\n"));
+    return PR_TRUE;
+}
+
+static void
+ReleaseLock()
+{
+    if (ipcSyncEvent) {
+        LOG(("releasing lock...\n"));
+        CloseHandle(ipcSyncEvent);
+        ipcSyncEvent = NULL;
+    }
+}
+
+//-----------------------------------------------------------------------------
+// main
+//-----------------------------------------------------------------------------
+
+#ifdef DEBUG
+int
+main()
+#else
+int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
+#endif
+{
+    IPC_InitLog("###");
+
+    LOG(("daemon started...\n"));
+
+    if (!AcquireLock()) {
+        // unblock the parent; it should be able to find the IPC window of the
+        // other daemon process.
+        IPC_NotifyParent();
+        return 0;
+    }
+
+    // initialize global data
+    memset(ipcClientArray, 0, sizeof(ipcClientArray));
+    ipcClients = ipcClientArray;
+    ipcClientCount = 0;
+
+    // create message window up front...
+    WNDCLASS wc;
+    memset(&wc, 0, sizeof(wc));
+    wc.lpfnWndProc = WindowProc;
+    wc.lpszClassName = IPC_WINDOW_CLASS;
+
+    RegisterClass(&wc);
+
+    ipcHwnd = CreateWindow(IPC_WINDOW_CLASS, IPC_WINDOW_NAME,
+                           0, 0, 0, 10, 10, NULL, NULL, NULL, NULL);
+
+    // unblock the parent process; it should now look for the IPC window.
+    IPC_NotifyParent();
+
+    if (!ipcHwnd)
+        return -1;
+
+    // load modules relative to the location of the executable...
+    {
+        char path[MAX_PATH];
+        GetModuleFileName(NULL, path, sizeof(path));
+        IPC_InitModuleReg(path);
+    }
+
+    LOG(("entering message loop...\n"));
+    MSG msg;
+    while (GetMessage(&msg, ipcHwnd, 0, 0))
+        DispatchMessage(&msg);
+
+    // unload modules
+    IPC_ShutdownModuleReg();
+
+    //
+    // we release the daemon lock before destroying the window because the
+    // absence of our window is what will cause clients to try to spawn the
+    // daemon.
+    //
+    ReleaseLock();
+
+    //LOG(("sleeping 5 seconds...\n"));
+    //PR_Sleep(PR_SecondsToInterval(5));
+
+    LOG(("destroying message window...\n"));
+    DestroyWindow(ipcHwnd);
+    ipcHwnd = NULL;
+
+    LOG(("exiting\n"));
+    return 0;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/Makefile.in
new file mode 100644
index 00000000..e258946b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/Makefile.in
@@ -0,0 +1,49 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+DIRS        = lock transmngr dconnect
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/Makefile.kup b/src/libs/xpcom18a4/ipc/ipcd/extensions/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/Makefile.kup
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/Makefile.in
new file mode 100644
index 00000000..e6a89153
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/Makefile.in
@@ -0,0 +1,52 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+DIRS        = public src
+
+ifdef ENABLE_TESTS
+DIRS		+= test
+endif
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/Makefile.kup b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/Makefile.kup
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/public/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/public/Makefile.in
new file mode 100644
index 00000000..b2b3dbaa
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/public/Makefile.in
@@ -0,0 +1,53 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+XPIDL_MODULE= ipcd_dconnect
+
+XPIDLSRCS	= \
+			ipcIDConnectService.idl \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/public/ipcIDConnectService.idl b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/public/ipcIDConnectService.idl
new file mode 100644
index 00000000..6ca16a2d
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/public/ipcIDConnectService.idl
@@ -0,0 +1,79 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsISupports.idl"
+
+/**
+ * This service provides methods similar to nsIComponentManager and
+ * nsIServiceManager.  A ClientID parameter specifies the remote process
+ * in which the object should live.
+ *
+ * ipcIService can be used to determine the ClientID of a remote process.
+ *
+ * It is assumed that both processes have access to the same typelibs.
+ */
+[scriptable, uuid(fe07ed16-2710-4a1e-a4e2-81302b62bf0e)]
+interface ipcIDConnectService : nsISupports
+{
+  void createInstance(
+    in unsigned long aClientID,
+    in nsCIDRef aClass,
+    in nsIIDRef aIID,
+    [iid_is(aIID),retval] out nsQIResult result
+  );
+
+  void createInstanceByContractID(
+    in unsigned long aClientID,
+    in string aContractID,
+    in nsIIDRef aIID,
+    [iid_is(aIID),retval] out nsQIResult result
+  );
+
+  void getService(
+    in unsigned long aClientID,
+    in nsCIDRef aClass,
+    in nsIIDRef aIID,
+    [iid_is(aIID),retval] out nsQIResult result
+  );
+
+  void getServiceByContractID(
+    in unsigned long aClientID,
+    in string aContractID,
+    in nsIIDRef aIID,
+    [iid_is(aIID),retval] out nsQIResult result
+  );
+};
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/Makefile.in
new file mode 100644
index 00000000..a9efaadf
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/Makefile.in
@@ -0,0 +1,66 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE				= ipcd
+LIBRARY_NAME		= ipcddconnect_s
+FORCE_STATIC_LIB	= 1
+MODULE_NAME			= ipcd
+
+FORCE_USE_PIC	= 1
+
+REQUIRES	= \
+			xpcom \
+			string \
+			$(NULL)
+
+CPPSRCS		= \
+			ipcDConnectService.cpp \
+			$(NULL)
+
+LOCAL_INCLUDES = \
+			-I$(srcdir)/../../../shared/src \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/Makefile.kup b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/Makefile.kup
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp
new file mode 100644
index 00000000..32565df2
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp
@@ -0,0 +1,4210 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *   Dmitry A. Kuminov <dmik@innotek.de>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcDConnectService.h"
+#include "ipcMessageWriter.h"
+#include "ipcMessageReader.h"
+#include "ipcLog.h"
+
+#include "nsIServiceManagerUtils.h"
+#include "nsIInterfaceInfo.h"
+#include "nsIInterfaceInfoManager.h"
+#include "nsIExceptionService.h"
+#include "nsString.h"
+#include "nsVoidArray.h"
+#include "nsCRT.h"
+#include "nsDeque.h"
+#include "xptcall.h"
+
+#ifdef VBOX
+# include <map>
+# include <list>
+# include <iprt/err.h>
+# include <iprt/req.h>
+# include <iprt/mem.h>
+# include <iprt/time.h>
+# include <iprt/thread.h>
+#endif /* VBOX */
+
+#if defined(DCONNECT_MULTITHREADED)
+
+#if !defined(DCONNECT_WITH_IPRT_REQ_POOL)
+#include "nsIThread.h"
+#include "nsIRunnable.h"
+#endif
+
+#if defined(DEBUG) && !defined(DCONNECT_STATS)
+#define DCONNECT_STATS
+#endif
+
+#if defined(DCONNECT_STATS)
+#include <stdio.h>
+#endif
+
+#endif
+
+// XXX TODO:
+//  1. add thread affinity field to SETUP messages
+
+//-----------------------------------------------------------------------------
+
+#define DCONNECT_IPC_TARGETID                      \
+{ /* 43ca47ef-ebc8-47a2-9679-a4703218089f */       \
+  0x43ca47ef,                                      \
+  0xebc8,                                          \
+  0x47a2,                                          \
+  {0x96, 0x79, 0xa4, 0x70, 0x32, 0x18, 0x08, 0x9f} \
+}
+static const nsID kDConnectTargetID = DCONNECT_IPC_TARGETID;
+
+//-----------------------------------------------------------------------------
+
+#define DCON_WAIT_TIMEOUT PR_INTERVAL_NO_TIMEOUT
+
+//-----------------------------------------------------------------------------
+
+//
+// +--------------------------------------+
+// | major opcode : 1 byte                |
+// +--------------------------------------+
+// | minor opcode : 1 byte                |
+// +--------------------------------------+
+// | flags        : 2 bytes               |
+// +--------------------------------------+
+// .                                      .
+// . variable payload                     .
+// .                                      .
+// +--------------------------------------+
+//
+
+// dconnect major opcodes
+#define DCON_OP_SETUP   1
+#define DCON_OP_RELEASE 2
+#define DCON_OP_INVOKE  3
+
+#define DCON_OP_SETUP_REPLY  4
+#define DCON_OP_INVOKE_REPLY 5
+
+// dconnect minor opcodes for DCON_OP_SETUP
+#define DCON_OP_SETUP_NEW_INST_CLASSID    1
+#define DCON_OP_SETUP_NEW_INST_CONTRACTID 2
+#define DCON_OP_SETUP_GET_SERV_CLASSID    3
+#define DCON_OP_SETUP_GET_SERV_CONTRACTID 4
+#define DCON_OP_SETUP_QUERY_INTERFACE     5
+
+// dconnect minor opcodes for RELEASE
+// dconnect minor opcodes for INVOKE
+
+// DCON_OP_SETUP_REPLY and DCON_OP_INVOKE_REPLY flags
+#define DCON_OP_FLAGS_REPLY_EXCEPTION   0x0001
+
+// Within this time all the worker threads must be terminated.
+#define VBOX_XPCOM_SHUTDOWN_TIMEOUT_MS  (5000)
+
+#pragma pack(1)
+
+struct DConnectOp
+{
+  PRUint8  opcode_major;
+  PRUint8  opcode_minor;
+  PRUint16 flags;
+  PRUint32 request_index; // initialized with NewRequestIndex
+};
+
+// SETUP structs
+
+struct DConnectSetup : DConnectOp
+{
+  nsID iid;
+};
+
+struct DConnectSetupClassID : DConnectSetup
+{
+  nsID classid;
+};
+
+struct DConnectSetupContractID : DConnectSetup
+{
+  char contractid[1]; // variable length
+};
+
+struct DConnectSetupQueryInterface : DConnectSetup
+{
+  DConAddr instance;
+};
+
+// SETUP_REPLY struct
+
+struct DConnectSetupReply : DConnectOp
+{
+  DConAddr instance;
+  nsresult status;
+  // optionally followed by a specially serialized nsIException instance (see
+  // ipcDConnectService::SerializeException) if DCON_OP_FLAGS_REPLY_EXCEPTION is
+  // present in flags
+};
+
+// RELEASE struct
+
+struct DConnectRelease : DConnectOp
+{
+  DConAddr instance;
+};
+
+// INVOKE struct
+
+struct DConnectInvoke : DConnectOp
+{
+  DConAddr instance;
+  PRUint16 method_index;
+  // followed by an array of in-param blobs
+};
+
+// INVOKE_REPLY struct
+
+struct DConnectInvokeReply : DConnectOp
+{
+  nsresult result;
+  // followed by an array of out-param blobs if NS_SUCCEEDED(result), and
+  // optionally by a specially serialized nsIException instance (see
+  // ipcDConnectService::SerializeException) if DCON_OP_FLAGS_REPLY_EXCEPTION is
+  // present in flags
+};
+
+#pragma pack()
+
+//-----------------------------------------------------------------------------
+
+struct DConAddrPlusPtr
+{
+  DConAddr addr;
+  void *p;
+};
+
+//-----------------------------------------------------------------------------
+
+ipcDConnectService *ipcDConnectService::mInstance = nsnull;
+
+//-----------------------------------------------------------------------------
+
+static nsresult
+SetupPeerInstance(PRUint32 aPeerID, DConnectSetup *aMsg, PRUint32 aMsgLen,
+                  void **aInstancePtr);
+
+//-----------------------------------------------------------------------------
+
+// A wrapper class holding an instance to an in-process XPCOM object.
+
+class DConnectInstance
+{
+public:
+  DConnectInstance(PRUint32 peer, nsIInterfaceInfo *iinfo, nsISupports *instance)
+    : mPeer(peer)
+    , mIInfo(iinfo)
+    , mInstance(instance)
+  {}
+
+  nsISupports      *RealInstance()  { return mInstance; }
+  nsIInterfaceInfo *InterfaceInfo() { return mIInfo; }
+  PRUint32          Peer()          { return mPeer; }
+
+  DConnectInstanceKey::Key GetKey() {
+    const nsID *iid;
+    mIInfo->GetIIDShared(&iid);
+    return DConnectInstanceKey::Key(mPeer, mInstance, iid);
+  }
+
+  NS_IMETHODIMP_(nsrefcnt) AddRef(void)
+  {
+    NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "illegal refcnt");
+    nsrefcnt count;
+    count = PR_AtomicIncrement((PRInt32*)&mRefCnt);
+    return count;
+  }
+
+  NS_IMETHODIMP_(nsrefcnt) Release(void)
+  {
+    nsrefcnt count;
+    NS_PRECONDITION(0 != mRefCnt, "dup release");
+    count = PR_AtomicDecrement((PRInt32 *)&mRefCnt);
+    if (0 == count) {
+      NS_PRECONDITION(PRInt32(mRefCntIPC) == 0, "non-zero IPC refcnt");
+      mRefCnt = 1; /* stabilize */
+      delete this;
+      return 0;
+    }
+    return count;
+  }
+
+  // this gets called after calling AddRef() on an instance passed to the
+  // client over IPC in order to have a count of IPC client-related references
+  // separately from the overall reference count
+  NS_IMETHODIMP_(nsrefcnt) AddRefIPC(void)
+  {
+    NS_PRECONDITION(PRInt32(mRefCntIPC) >= 0, "illegal refcnt");
+    nsrefcnt count = PR_AtomicIncrement((PRInt32*)&mRefCntIPC);
+    return count;
+  }
+
+  // this gets called before calling Release() when DCON_OP_RELEASE is
+  // received from the IPC client and in other cases to balance AddRefIPC()
+  NS_IMETHODIMP_(nsrefcnt) ReleaseIPC(PRBool locked = PR_FALSE)
+  {
+    NS_PRECONDITION(0 != mRefCntIPC, "dup release");
+    nsrefcnt count = PR_AtomicDecrement((PRInt32 *)&mRefCntIPC);
+    if (0 == count) {
+      // If the last IPC reference is released, remove this instance from the map.
+      // ipcDConnectService is guaranteed to still exist here
+      // (DConnectInstance lifetime is bound to ipcDConnectService)
+      nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+      if (dConnect)
+        dConnect->DeleteInstance(this, locked);
+      else
+        NS_NOTREACHED("ipcDConnectService has gone before DConnectInstance");
+    }
+    return count;
+  }
+
+private:
+  nsAutoRefCnt               mRefCnt;
+  nsAutoRefCnt               mRefCntIPC;
+  PRUint32                   mPeer;  // peer process "owning" this instance
+  nsCOMPtr<nsIInterfaceInfo> mIInfo;
+  nsCOMPtr<nsISupports>      mInstance;
+};
+
+void
+ipcDConnectService::ReleaseWrappers(nsVoidArray &wrappers, PRUint32 peer)
+{
+  nsAutoLock lock (mLock);
+
+  for (PRInt32 i=0; i<wrappers.Count(); ++i)
+  {
+    DConnectInstance *wrapper = (DConnectInstance *)wrappers[i];
+    if (mInstanceSet.Contains(wrapper) && wrapper->Peer() == peer)
+    {
+      wrapper->ReleaseIPC(PR_TRUE /* locked */);
+      wrapper->Release();
+    }
+  }
+}
+
+//-----------------------------------------------------------------------------
+
+static nsresult
+SerializeParam(ipcMessageWriter &writer, const nsXPTType &t, const nsXPTCMiniVariant &v)
+{
+  switch (t.TagPart())
+  {
+    case nsXPTType::T_I8:
+    case nsXPTType::T_U8:
+      writer.PutInt8(v.val.u8);
+      break;
+
+    case nsXPTType::T_I16:
+    case nsXPTType::T_U16:
+      writer.PutInt16(v.val.u16);
+      break;
+
+    case nsXPTType::T_I32:
+    case nsXPTType::T_U32:
+      writer.PutInt32(v.val.u32);
+      break;
+
+    case nsXPTType::T_I64:
+    case nsXPTType::T_U64:
+      writer.PutBytes(&v.val.u64, sizeof(PRUint64));
+      break;
+
+    case nsXPTType::T_FLOAT:
+      writer.PutBytes(&v.val.f, sizeof(float));
+      break;
+
+    case nsXPTType::T_DOUBLE:
+      writer.PutBytes(&v.val.d, sizeof(double));
+      break;
+
+    case nsXPTType::T_BOOL:
+      writer.PutBytes(&v.val.b, sizeof(PRBool));
+      break;
+
+    case nsXPTType::T_CHAR:
+      writer.PutBytes(&v.val.c, sizeof(char));
+      break;
+
+    case nsXPTType::T_WCHAR:
+      writer.PutBytes(&v.val.wc, sizeof(PRUnichar));
+      break;
+
+    case nsXPTType::T_IID:
+      {
+        AssertReturn(v.val.p, NS_ERROR_INVALID_POINTER);
+        writer.PutBytes(v.val.p, sizeof(nsID));
+      }
+      break;
+
+    case nsXPTType::T_CHAR_STR:
+      {
+        if (v.val.p)
+        {
+          int len = strlen((const char *) v.val.p);
+          writer.PutInt32(len);
+          writer.PutBytes(v.val.p, len);
+        }
+        else
+        {
+          // put -1 to indicate null string
+          writer.PutInt32((PRUint32) -1);
+        }
+      }
+      break;
+
+    case nsXPTType::T_WCHAR_STR:
+      {
+        if (v.val.p)
+        {
+          int len = 2 * nsCRT::strlen((const PRUnichar *) v.val.p);
+          writer.PutInt32(len);
+          writer.PutBytes(v.val.p, len);
+        }
+        else
+        {
+          // put -1 to indicate null string
+          writer.PutInt32((PRUint32) -1);
+        }
+      }
+      break;
+
+    case nsXPTType::T_INTERFACE:
+    case nsXPTType::T_INTERFACE_IS:
+      NS_NOTREACHED("this should be handled elsewhere");
+      return NS_ERROR_UNEXPECTED;
+
+    case nsXPTType::T_ASTRING:
+    case nsXPTType::T_DOMSTRING:
+      {
+        const nsAString *str = (const nsAString *) v.val.p;
+
+        PRUint32 len = 2 * str->Length();
+        nsAString::const_iterator begin;
+        const PRUnichar *data = str->BeginReading(begin).get();
+
+        writer.PutInt32(len);
+        writer.PutBytes(data, len);
+      }
+      break;
+
+    case nsXPTType::T_UTF8STRING:
+    case nsXPTType::T_CSTRING:
+      {
+        const nsACString *str = (const nsACString *) v.val.p;
+
+        PRUint32 len = str->Length();
+        nsACString::const_iterator begin;
+        const char *data = str->BeginReading(begin).get();
+
+        writer.PutInt32(len);
+        writer.PutBytes(data, len);
+      }
+      break;
+
+    case nsXPTType::T_ARRAY:
+      // arrays are serialized after all other params outside this routine
+      break;
+
+    case nsXPTType::T_VOID:
+    case nsXPTType::T_PSTRING_SIZE_IS:
+    case nsXPTType::T_PWSTRING_SIZE_IS:
+    default:
+      LOG(("unexpected parameter type: %d\n", t.TagPart()));
+      return NS_ERROR_UNEXPECTED;
+  }
+  return NS_OK;
+}
+
+static nsresult
+DeserializeParam(ipcMessageReader &reader, const nsXPTType &t, nsXPTCVariant &v)
+{
+  // defaults
+  v.ptr = nsnull;
+  v.type = t;
+  v.flags = 0;
+
+  switch (t.TagPart())
+  {
+    case nsXPTType::T_I8:
+    case nsXPTType::T_U8:
+      v.val.u8 = reader.GetInt8();
+      break;
+
+    case nsXPTType::T_I16:
+    case nsXPTType::T_U16:
+      v.val.u16 = reader.GetInt16();
+      break;
+
+    case nsXPTType::T_I32:
+    case nsXPTType::T_U32:
+      v.val.u32 = reader.GetInt32();
+      break;
+
+    case nsXPTType::T_I64:
+    case nsXPTType::T_U64:
+      reader.GetBytes(&v.val.u64, sizeof(v.val.u64));
+      break;
+
+    case nsXPTType::T_FLOAT:
+      reader.GetBytes(&v.val.f, sizeof(v.val.f));
+      break;
+
+    case nsXPTType::T_DOUBLE:
+      reader.GetBytes(&v.val.d, sizeof(v.val.d));
+      break;
+
+    case nsXPTType::T_BOOL:
+      reader.GetBytes(&v.val.b, sizeof(v.val.b));
+      break;
+
+    case nsXPTType::T_CHAR:
+      reader.GetBytes(&v.val.c, sizeof(v.val.c));
+      break;
+
+    case nsXPTType::T_WCHAR:
+      reader.GetBytes(&v.val.wc, sizeof(v.val.wc));
+      break;
+
+    case nsXPTType::T_IID:
+      {
+        nsID *buf = (nsID *) nsMemory::Alloc(sizeof(nsID));
+        reader.GetBytes(buf, sizeof(nsID));
+        v.val.p = buf;
+        v.SetValIsAllocated();
+      }
+      break;
+
+    case nsXPTType::T_CHAR_STR:
+      {
+        PRUint32 len = reader.GetInt32();
+        if (len == (PRUint32) -1)
+        {
+          // it's a null string
+          v.val.p = nsnull;
+        }
+        else
+        {
+          char *buf = (char *) nsMemory::Alloc(len + 1);
+          reader.GetBytes(buf, len);
+          buf[len] = char(0);
+
+          v.val.p = buf;
+          v.SetValIsAllocated();
+        }
+      }
+      break;
+
+    case nsXPTType::T_WCHAR_STR:
+      {
+        PRUint32 len = reader.GetInt32();
+        if (len == (PRUint32) -1)
+        {
+          // it's a null string
+          v.val.p = nsnull;
+        }
+        else
+        {
+          PRUnichar *buf = (PRUnichar *) nsMemory::Alloc(len + 2);
+          reader.GetBytes(buf, len);
+          buf[len / 2] = PRUnichar(0);
+
+          v.val.p = buf;
+          v.SetValIsAllocated();
+        }
+      }
+      break;
+
+    case nsXPTType::T_INTERFACE:
+    case nsXPTType::T_INTERFACE_IS:
+      {
+        reader.GetBytes(&v.val.u64, sizeof(DConAddr));
+        // stub creation will be handled outside this routine.  we only
+        // deserialize the DConAddr into v.val.u64 temporarily.
+      }
+      break;
+
+    case nsXPTType::T_ASTRING:
+    case nsXPTType::T_DOMSTRING:
+      {
+        PRUint32 len = reader.GetInt32();
+
+        nsString *str = new nsString();
+        str->SetLength(len / 2);
+        PRUnichar *buf = str->BeginWriting();
+        reader.GetBytes(buf, len);
+
+        v.val.p = str;
+        v.SetValIsDOMString();
+      }
+      break;
+
+    case nsXPTType::T_UTF8STRING:
+    case nsXPTType::T_CSTRING:
+      {
+        PRUint32 len = reader.GetInt32();
+
+        nsCString *str = new nsCString();
+        str->SetLength(len);
+        char *buf = str->BeginWriting();
+        reader.GetBytes(buf, len);
+
+        v.val.p = str;
+
+        // this distinction here is pretty pointless
+        if (t.TagPart() == nsXPTType::T_CSTRING)
+          v.SetValIsCString();
+        else
+          v.SetValIsUTF8String();
+      }
+      break;
+
+    case nsXPTType::T_ARRAY:
+      // arrays are deserialized after all other params outside this routine
+      break;
+
+    case nsXPTType::T_VOID:
+    case nsXPTType::T_PSTRING_SIZE_IS:
+    case nsXPTType::T_PWSTRING_SIZE_IS:
+    default:
+      LOG(("unexpected parameter type\n"));
+      return NS_ERROR_UNEXPECTED;
+  }
+  return NS_OK;
+}
+
+static nsresult
+SetupParam(const nsXPTParamInfo &p, nsXPTCVariant &v)
+{
+  const nsXPTType &t = p.GetType();
+
+  if (p.IsIn() && p.IsDipper())
+  {
+    v.ptr = nsnull;
+    v.flags = 0;
+
+    switch (t.TagPart())
+    {
+      case nsXPTType::T_ASTRING:
+      case nsXPTType::T_DOMSTRING:
+        v.val.p = new nsString();
+        if (!v.val.p)
+          return NS_ERROR_OUT_OF_MEMORY;
+        v.type = t;
+        v.SetValIsDOMString();
+        break;
+
+      case nsXPTType::T_UTF8STRING:
+      case nsXPTType::T_CSTRING:
+        v.val.p = new nsCString();
+        if (!v.val.p)
+          return NS_ERROR_OUT_OF_MEMORY;
+        v.type = t;
+        v.SetValIsCString();
+        break;
+
+      default:
+        LOG(("unhandled dipper: type=%d\n", t.TagPart()));
+        return NS_ERROR_UNEXPECTED;
+    }
+  }
+  else if (p.IsOut() || p.IsRetval())
+  {
+    memset(&v.val, 0, sizeof(v.val));
+    v.ptr = &v.val;
+    v.type = t;
+    v.flags = 0;
+    v.SetPtrIsData();
+
+    // the ownership of output nsID, string, wstring, interface pointers and
+    // arrays is transferred to the receiving party. Therefore, we need to
+    // instruct FinishParam() to perform a cleanup after serializing them.
+    switch (t.TagPart())
+    {
+      case nsXPTType::T_IID:
+      case nsXPTType::T_CHAR_STR:
+      case nsXPTType::T_WCHAR_STR:
+      case nsXPTType::T_ARRAY:
+        v.SetValIsAllocated();
+        break;
+      case nsXPTType::T_INTERFACE:
+      case nsXPTType::T_INTERFACE_IS:
+        v.SetValIsInterface();
+        break;
+      default:
+        break;
+    }
+  }
+
+  return NS_OK;
+}
+
+static void
+FinishParam(nsXPTCVariant &v)
+{
+#ifdef VBOX
+  /* make valgrind happy */
+  if (!v.MustFreeVal())
+    return;
+#endif
+  if (!v.val.p)
+    return;
+
+  if (v.IsValAllocated())
+    nsMemory::Free(v.val.p);
+  else if (v.IsValInterface())
+    ((nsISupports *) v.val.p)->Release();
+  else if (v.IsValDOMString())
+    delete (nsAString *) v.val.p;
+  else if (v.IsValUTF8String() || v.IsValCString())
+    delete (nsACString *) v.val.p;
+}
+
+static nsresult
+DeserializeResult(ipcMessageReader &reader, const nsXPTType &t, nsXPTCMiniVariant &v)
+{
+  if (v.val.p == nsnull)
+    return NS_OK;
+
+  switch (t.TagPart())
+  {
+    case nsXPTType::T_I8:
+    case nsXPTType::T_U8:
+      *((PRUint8 *) v.val.p) = reader.GetInt8();
+      break;
+
+    case nsXPTType::T_I16:
+    case nsXPTType::T_U16:
+      *((PRUint16 *) v.val.p) = reader.GetInt16();
+      break;
+
+    case nsXPTType::T_I32:
+    case nsXPTType::T_U32:
+      *((PRUint32 *) v.val.p) = reader.GetInt32();
+      break;
+
+    case nsXPTType::T_I64:
+    case nsXPTType::T_U64:
+      reader.GetBytes(v.val.p, sizeof(PRUint64));
+      break;
+
+    case nsXPTType::T_FLOAT:
+      reader.GetBytes(v.val.p, sizeof(float));
+      break;
+
+    case nsXPTType::T_DOUBLE:
+      reader.GetBytes(v.val.p, sizeof(double));
+      break;
+
+    case nsXPTType::T_BOOL:
+      reader.GetBytes(v.val.p, sizeof(PRBool));
+      break;
+
+    case nsXPTType::T_CHAR:
+      reader.GetBytes(v.val.p, sizeof(char));
+      break;
+
+    case nsXPTType::T_WCHAR:
+      reader.GetBytes(v.val.p, sizeof(PRUnichar));
+      break;
+
+    case nsXPTType::T_IID:
+      {
+        nsID *buf = (nsID *) nsMemory::Alloc(sizeof(nsID));
+        reader.GetBytes(buf, sizeof(nsID));
+        *((nsID **) v.val.p) = buf;
+      }
+      break;
+
+    case nsXPTType::T_CHAR_STR:
+      {
+        PRUint32 len = reader.GetInt32();
+        if (len == (PRUint32) -1)
+        {
+          // it's a null string
+#ifdef VBOX
+          *((char **) v.val.p) = NULL;
+#else
+          v.val.p = 0;
+#endif
+        }
+        else
+        {
+          char *buf = (char *) nsMemory::Alloc(len + 1);
+          reader.GetBytes(buf, len);
+          buf[len] = char(0);
+
+          *((char **) v.val.p) = buf;
+        }
+      }
+      break;
+
+    case nsXPTType::T_WCHAR_STR:
+      {
+        PRUint32 len = reader.GetInt32();
+        if (len == (PRUint32) -1)
+        {
+          // it's a null string
+#ifdef VBOX
+          *((PRUnichar **) v.val.p) = 0;
+#else
+          v.val.p = 0;
+#endif
+        }
+        else
+        {
+          PRUnichar *buf = (PRUnichar *) nsMemory::Alloc(len + 2);
+          reader.GetBytes(buf, len);
+          buf[len / 2] = PRUnichar(0);
+
+          *((PRUnichar **) v.val.p) = buf;
+        }
+      }
+      break;
+
+    case nsXPTType::T_INTERFACE:
+    case nsXPTType::T_INTERFACE_IS:
+      {
+        // stub creation will be handled outside this routine.  we only
+        // deserialize the DConAddr and the original value of v.val.p
+        // into v.val.p temporarily.  needs temporary memory alloc.
+        DConAddrPlusPtr *buf = (DConAddrPlusPtr *) nsMemory::Alloc(sizeof(DConAddrPlusPtr));
+        reader.GetBytes(&buf->addr, sizeof(DConAddr));
+        buf->p = v.val.p;
+        v.val.p = buf;
+      }
+      break;
+
+    case nsXPTType::T_ASTRING:
+    case nsXPTType::T_DOMSTRING:
+      {
+        PRUint32 len = reader.GetInt32();
+
+        nsAString *str = (nsAString *) v.val.p;
+
+        nsAString::iterator begin;
+        str->SetLength(len / 2);
+        str->BeginWriting(begin);
+
+        reader.GetBytes(begin.get(), len);
+      }
+      break;
+
+    case nsXPTType::T_UTF8STRING:
+    case nsXPTType::T_CSTRING:
+      {
+        PRUint32 len = reader.GetInt32();
+
+        nsACString *str = (nsACString *) v.val.p;
+
+        nsACString::iterator begin;
+        str->SetLength(len);
+        str->BeginWriting(begin);
+
+        reader.GetBytes(begin.get(), len);
+      }
+      break;
+
+    case nsXPTType::T_ARRAY:
+      // arrays are deserialized after all other params outside this routine
+      break;
+
+    case nsXPTType::T_VOID:
+    case nsXPTType::T_PSTRING_SIZE_IS:
+    case nsXPTType::T_PWSTRING_SIZE_IS:
+    default:
+      LOG(("unexpected parameter type\n"));
+      return NS_ERROR_UNEXPECTED;
+  }
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+//
+// Returns an element from the nsXPTCMiniVariant array by properly casting it to
+// nsXPTCVariant when requested
+#define GET_PARAM(params, isXPTCVariantArray, idx) \
+    (isXPTCVariantArray ? ((nsXPTCVariant *) params) [idx] : params [idx])
+
+// isResult is PR_TRUE if the size_is and length_is params are out or retval
+// so that nsXPTCMiniVariants contain pointers to their locations instead of the
+// values themselves.
+static nsresult
+GetArrayParamInfo(nsIInterfaceInfo *iinfo, uint16 methodIndex,
+                  const nsXPTMethodInfo &methodInfo, nsXPTCMiniVariant *params,
+                  PRBool isXPTCVariantArray, const nsXPTParamInfo &paramInfo,
+                  PRBool isResult, PRUint32 &size, PRUint32 &length,
+                  nsXPTType &elemType)
+{
+  // XXX multidimensional arrays are not supported so dimension is always 0 for
+  // getting the size_is argument number of the array itself and 1 for getting
+  // the type of elements stored in the array.
+
+  nsresult rv;
+
+  // get the array size
+  PRUint8 sizeArg;
+  rv = iinfo->GetSizeIsArgNumberForParam(methodIndex, &paramInfo, 0, &sizeArg);
+  if (NS_FAILED(rv))
+    return rv;
+
+  // get the number of valid elements
+  PRUint8 lenArg;
+  rv = iinfo->GetLengthIsArgNumberForParam(methodIndex, &paramInfo, 0, &lenArg);
+  if (NS_FAILED(rv))
+    return rv;
+
+  // according to XPT specs
+  // (http://www.mozilla.org/scriptable/typelib_file.html), size_is and
+  // length_is for arrays is always uint32. Check this too.
+  {
+    nsXPTParamInfo pi = methodInfo.GetParam (sizeArg);
+    if (pi.GetType().TagPart() != nsXPTType::T_U32)
+    {
+      LOG(("unexpected size_is() parameter type: $d\n",
+           pi.GetType().TagPart()));
+      return NS_ERROR_UNEXPECTED;
+    }
+
+    pi = methodInfo.GetParam (lenArg);
+    if (pi.GetType().TagPart() != nsXPTType::T_U32)
+    {
+      LOG(("unexpected length_is() parameter type: $d\n",
+           pi.GetType().TagPart()));
+      return NS_ERROR_UNEXPECTED;
+    }
+  }
+
+  if (isResult)
+  {
+    length = *((PRUint32 *) GET_PARAM(params,isXPTCVariantArray, lenArg).val.p);
+    size = *((PRUint32 *) GET_PARAM(params, isXPTCVariantArray, sizeArg).val.p);
+  }
+  else
+  {
+    length = GET_PARAM(params, isXPTCVariantArray, lenArg).val.u32;
+    size = GET_PARAM(params, isXPTCVariantArray, sizeArg).val.u32;
+  }
+
+  if (length > size)
+  {
+    NS_WARNING("length_is() value is greater than size_is() value");
+    length = size;
+  }
+
+  // get type of array elements
+  rv = iinfo->GetTypeForParam(methodIndex, &paramInfo, 1, &elemType);
+  if (NS_FAILED(rv))
+    return rv;
+
+  if (elemType.IsArithmetic() &&
+      (elemType.IsPointer() || elemType.IsUniquePointer() ||
+       elemType.IsReference()))
+  {
+    LOG(("arrays of pointers and references to arithmetic types are "
+         "not yet supported\n"));
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  if (elemType.IsArray())
+  {
+    LOG(("multidimensional arrays are not yet supported\n"));
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  return NS_OK;
+}
+
+static nsresult
+GetTypeSize(const nsXPTType &type, PRUint32 &size, PRBool &isSimple)
+{
+  // get the type size in bytes
+  size = 0;
+  isSimple = PR_TRUE;
+  switch (type.TagPart())
+  {
+    case nsXPTType::T_I8:             size = sizeof(PRInt8);      break;
+    case nsXPTType::T_I16:            size = sizeof(PRInt16);     break;
+    case nsXPTType::T_I32:            size = sizeof(PRInt32);     break;
+    case nsXPTType::T_I64:            size = sizeof(PRInt64);     break;
+    case nsXPTType::T_U8:             size = sizeof(PRUint8);     break;
+    case nsXPTType::T_U16:            size = sizeof(PRUint16);    break;
+    case nsXPTType::T_U32:            size = sizeof(PRUint32);    break;
+    case nsXPTType::T_U64:            size = sizeof(PRUint64);    break;
+    case nsXPTType::T_FLOAT:          size = sizeof(float);       break;
+    case nsXPTType::T_DOUBLE:         size = sizeof(double);      break;
+    case nsXPTType::T_BOOL:           size = sizeof(PRBool);      break;
+    case nsXPTType::T_CHAR:           size = sizeof(char);        break;
+    case nsXPTType::T_WCHAR:          size = sizeof(PRUnichar);   break;
+    case nsXPTType::T_IID:            /* fall through */
+    case nsXPTType::T_CHAR_STR:       /* fall through */
+    case nsXPTType::T_WCHAR_STR:      /* fall through */
+    case nsXPTType::T_ASTRING:        /* fall through */
+    case nsXPTType::T_DOMSTRING:      /* fall through */
+    case nsXPTType::T_UTF8STRING:     /* fall through */
+    case nsXPTType::T_CSTRING:        /* fall through */
+      size = sizeof(void *);
+      isSimple = PR_FALSE;
+      break;
+    case nsXPTType::T_INTERFACE:      /* fall through */
+    case nsXPTType::T_INTERFACE_IS:   /* fall through */
+      size = sizeof(DConAddr);
+      isSimple = PR_FALSE;
+      break;
+    default:
+      LOG(("unexpected parameter type: %d\n", type.TagPart()));
+      return NS_ERROR_UNEXPECTED;
+  }
+
+  return NS_OK;
+}
+
+static nsresult
+SerializeArrayParam(ipcDConnectService *dConnect,
+                    ipcMessageWriter &writer, PRUint32 peerID,
+                    nsIInterfaceInfo *iinfo, uint16 methodIndex,
+                    const nsXPTMethodInfo &methodInfo,
+                    nsXPTCMiniVariant *params, PRBool isXPTCVariantArray,
+                    const nsXPTParamInfo &paramInfo,
+                    void *array, nsVoidArray &wrappers)
+{
+  if (!array)
+  {
+    // put 0 to indicate null array
+    writer.PutInt8(0);
+    return NS_OK;
+  }
+
+  // put 1 to indicate non-null array
+  writer.PutInt8(1);
+
+  PRUint32 size = 0;
+  PRUint32 length = 0;
+  nsXPTType elemType;
+
+  nsresult rv = GetArrayParamInfo(iinfo, methodIndex, methodInfo, params,
+                                  isXPTCVariantArray, paramInfo, PR_FALSE,
+                                  size, length, elemType);
+  if (NS_FAILED (rv))
+      return rv;
+
+  PRUint32 elemSize = 0;
+  PRBool isSimple = PR_TRUE;
+  rv = GetTypeSize(elemType, elemSize, isSimple);
+  if (NS_FAILED (rv))
+      return rv;
+
+  if (isSimple)
+  {
+    // this is a simple arithmetic type, write the whole array at once
+    writer.PutBytes(array, length * elemSize);
+    return NS_OK;
+  }
+
+  // iterate over valid (length_is) elements of the array
+  // and serialize each of them
+  nsXPTCMiniVariant v;
+  for (PRUint32 i = 0; i < length; ++i)
+  {
+    v.val.p = ((void **) array) [i];
+
+    if (elemType.IsInterfacePointer())
+    {
+      nsID iid;
+      rv = dConnect->GetIIDForMethodParam(iinfo, &methodInfo, paramInfo, elemType,
+                                          methodIndex, params, isXPTCVariantArray,
+                                          iid);
+      if (NS_SUCCEEDED(rv))
+        rv = dConnect->SerializeInterfaceParam(writer, peerID, iid,
+                                               (nsISupports *) v.val.p,
+                                               wrappers);
+    }
+    else
+      rv = SerializeParam(writer, elemType, v);
+
+    if (NS_FAILED(rv))
+        return rv;
+  }
+
+  return NS_OK;
+}
+
+// isResult is PR_TRUE if the array param is out or retval
+static nsresult
+DeserializeArrayParam(ipcDConnectService *dConnect,
+                      ipcMessageReader &reader, PRUint32 peerID,
+                      nsIInterfaceInfo *iinfo, uint16 methodIndex,
+                      const nsXPTMethodInfo &methodInfo,
+                      nsXPTCMiniVariant *params, PRBool isXPTCVariantArray,
+                      const nsXPTParamInfo &paramInfo,
+                      PRBool isResult, void *&array)
+{
+  PRUint32 size = 0;
+  PRUint32 length = 0;
+  nsXPTType elemType;
+
+  nsresult rv = GetArrayParamInfo(iinfo, methodIndex, methodInfo, params,
+                                  isXPTCVariantArray, paramInfo, isResult,
+                                  size, length, elemType);
+  if (NS_FAILED(rv))
+    return rv;
+
+  PRUint8 prefix = reader.GetInt8();
+  if (prefix == 0)
+  {
+    // it's a null array
+    array = nsnull;
+    return NS_OK;
+  }
+  // sanity
+  if (prefix != 1)
+  {
+    LOG(("unexpected array prefix: %u\n", prefix));
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  PRUint32 elemSize = 0;
+  PRBool isSimple = PR_TRUE;
+  rv = GetTypeSize(elemType, elemSize, isSimple);
+  if (NS_FAILED (rv))
+      return rv;
+
+  // Note: for zero-sized arrays, we use the size of 1 because whether
+  // malloc(0) returns a null pointer or not (which is used in isNull())
+  // is implementation-dependent according to the C standard
+  void *arr = nsMemory::Alloc((size ? size : 1) * elemSize);
+  if (arr == nsnull)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  // initialize the unused space of the array with zeroes
+  if (length < size)
+    memset(((PRUint8 *) arr) + length * elemSize, 0,
+           (size - length) * elemSize);
+
+  if (isSimple)
+  {
+    // this is a simple arithmetic type, read the whole array at once
+    reader.GetBytes(arr, length * elemSize);
+
+    array = arr;
+    return NS_OK;
+  }
+
+  // iterate over valid (length_is) elements of the array
+  // and deserialize each of them individually
+  nsXPTCVariant v;
+  for (PRUint32 i = 0; i < length; ++i)
+  {
+    rv = DeserializeParam(reader, elemType, v);
+
+    if (NS_SUCCEEDED(rv) && elemType.IsInterfacePointer())
+    {
+      // grab the DConAddr value temporarily stored in the param
+      PtrBits bits = v.val.u64;
+
+      // DeserializeInterfaceParamBits needs IID only if it's a remote object
+      nsID iid;
+      if (bits & PTRBITS_REMOTE_BIT)
+        rv = dConnect->GetIIDForMethodParam(iinfo, &methodInfo, paramInfo,
+                                            elemType, methodIndex,
+                                            params, isXPTCVariantArray, iid);
+      if (NS_SUCCEEDED(rv))
+      {
+        nsISupports *obj = nsnull;
+        rv = dConnect->DeserializeInterfaceParamBits(bits, peerID, iid, obj);
+        if (NS_SUCCEEDED(rv))
+          v.val.p = obj;
+      }
+    }
+
+    if (NS_FAILED(rv))
+      break;
+
+    // note that we discard extended param informaton provided by nsXPTCVariant
+    // and will have to "reconstruct" it from the type tag in FinishArrayParam()
+    ((void **) arr) [i] = v.val.p;
+  }
+
+  if (NS_FAILED(rv))
+    nsMemory::Free(arr);
+  else
+    array = arr;
+
+  return rv;
+}
+
+static void
+FinishArrayParam(nsIInterfaceInfo *iinfo, uint16 methodIndex,
+                 const nsXPTMethodInfo &methodInfo, nsXPTCMiniVariant *params,
+                 PRBool isXPTCVariantArray, const nsXPTParamInfo &paramInfo,
+                 const nsXPTCMiniVariant &arrayVal)
+{
+  // nothing to do for a null array
+  void *arr = arrayVal.val.p;
+  if (!arr)
+    return;
+
+  PRUint32 size = 0;
+  PRUint32 length = 0;
+  nsXPTType elemType;
+
+  // note that FinishArrayParam is called only from OnInvoke to free memory
+  // after the call has been served. When OnInvoke sets up out and retval
+  // parameters for the real method, it passes pointers to the nsXPTCMiniVariant
+  // elements of the params array themselves so that they will eventually
+  // receive the returned values. For this reason, both in 'in' param and
+  // 'out/retaval' param cases, size_is and length_is may be read by
+  // GetArrayParamInfo() by value. Therefore, isResult is always PR_FALSE.
+  nsresult rv = GetArrayParamInfo(iinfo, methodIndex, methodInfo, params,
+                                  isXPTCVariantArray, paramInfo, PR_FALSE,
+                                  size, length, elemType);
+  if (NS_FAILED (rv))
+      return;
+
+  nsXPTCVariant v;
+  v.ptr = nsnull;
+  v.flags = 0;
+
+  // iterate over valid (length_is) elements of the array
+  // and free each of them
+  for (PRUint32 i = 0; i < length; ++i)
+  {
+    v.type = elemType.TagPart();
+
+    switch (elemType.TagPart())
+    {
+      case nsXPTType::T_I8:             /* fall through */
+      case nsXPTType::T_I16:            /* fall through */
+      case nsXPTType::T_I32:            /* fall through */
+      case nsXPTType::T_I64:            /* fall through */
+      case nsXPTType::T_U8:             /* fall through */
+      case nsXPTType::T_U16:            /* fall through */
+      case nsXPTType::T_U32:            /* fall through */
+      case nsXPTType::T_U64:            /* fall through */
+      case nsXPTType::T_FLOAT:          /* fall through */
+      case nsXPTType::T_DOUBLE:         /* fall through */
+      case nsXPTType::T_BOOL:           /* fall through */
+      case nsXPTType::T_CHAR:           /* fall through */
+      case nsXPTType::T_WCHAR:          /* fall through */
+        // nothing to free for arithmetic types
+        continue;
+      case nsXPTType::T_IID:            /* fall through */
+      case nsXPTType::T_CHAR_STR:       /* fall through */
+      case nsXPTType::T_WCHAR_STR:      /* fall through */
+        v.val.p = ((void **) arr) [i];
+        v.SetValIsAllocated();
+        break;
+      case nsXPTType::T_INTERFACE:      /* fall through */
+      case nsXPTType::T_INTERFACE_IS:   /* fall through */
+        v.val.p = ((void **) arr) [i];
+        v.SetValIsInterface();
+        break;
+      case nsXPTType::T_ASTRING:        /* fall through */
+      case nsXPTType::T_DOMSTRING:      /* fall through */
+        v.val.p = ((void **) arr) [i];
+        v.SetValIsDOMString();
+        break;
+      case nsXPTType::T_UTF8STRING:     /* fall through */
+        v.val.p = ((void **) arr) [i];
+        v.SetValIsUTF8String();
+        break;
+      case nsXPTType::T_CSTRING:        /* fall through */
+        v.val.p = ((void **) arr) [i];
+        v.SetValIsCString();
+        break;
+      default:
+        LOG(("unexpected parameter type: %d\n", elemType.TagPart()));
+        return;
+    }
+
+    FinishParam(v);
+  }
+}
+
+//-----------------------------------------------------------------------------
+
+static PRUint32
+NewRequestIndex()
+{
+  static PRInt32 sRequestIndex;
+  return (PRUint32) PR_AtomicIncrement(&sRequestIndex);
+}
+
+//-----------------------------------------------------------------------------
+
+#ifdef VBOX
+typedef struct ClientDownInfo
+{
+    ClientDownInfo(PRUint32 aClient)
+    {
+        uClient = aClient;
+        uTimestamp = PR_IntervalNow();
+    }
+
+    PRUint32 uClient;
+    PRIntervalTime uTimestamp;
+} ClientDownInfo;
+typedef std::map<PRUint32, ClientDownInfo *> ClientDownMap;
+typedef std::list<ClientDownInfo *> ClientDownList;
+
+#define MAX_CLIENT_DOWN_SIZE 10000
+
+/* Protected by the queue monitor. */
+static ClientDownMap g_ClientDownMap;
+static ClientDownList g_ClientDownList;
+
+#endif /* VBOX */
+
+class DConnectMsgSelector : public ipcIMessageObserver
+{
+public:
+  DConnectMsgSelector(PRUint32 peer, PRUint8 opCodeMajor, PRUint32 requestIndex)
+    : mPeer (peer)
+    , mOpCodeMajor(opCodeMajor)
+    , mRequestIndex(requestIndex)
+  {}
+
+  // stack based only
+  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
+  NS_IMETHOD_(nsrefcnt) Release() { return 1; }
+
+  NS_IMETHOD QueryInterface(const nsIID &aIID, void **aInstancePtr);
+
+  NS_IMETHOD OnMessageAvailable(PRUint32 aSenderID, const nsID &aTarget,
+                                const PRUint8 *aData, PRUint32 aDataLen)
+  {
+    // accept special "client dead" messages for a given peer
+    // (empty target id, zero data and data length)
+#ifndef VBOX
+    if (aSenderID == mPeer && aTarget.Equals(nsID()) && !aData && !aDataLen)
+        return NS_OK;
+#else /* VBOX */
+    if (aSenderID != IPC_SENDER_ANY && aTarget.Equals(nsID()) && !aData && !aDataLen)
+    {
+        // Insert new client down information. Start by expiring outdated
+        // entries and free one element if there's still no space (if needed).
+        PRIntervalTime now = PR_IntervalNow();
+        while (!g_ClientDownList.empty())
+        {
+            ClientDownInfo *cInfo = g_ClientDownList.back();
+            PRInt64 diff = (PRInt64)now - cInfo->uTimestamp;
+            if (diff < 0)
+                diff += (PRInt64)((PRIntervalTime)-1) + 1;
+            if (diff > PR_SecondsToInterval(15 * 60))
+            {
+                g_ClientDownMap.erase(cInfo->uClient);
+                g_ClientDownList.pop_back();
+                NS_ASSERTION(g_ClientDownMap.size() == g_ClientDownList.size(),
+                             "client down info inconsistency during expiry");
+                delete cInfo;
+            }
+            else
+                break;
+        }
+
+        ClientDownMap::iterator it = g_ClientDownMap.find(aSenderID);
+        if (it == g_ClientDownMap.end())
+        {
+            /* Getting size of a map is O(1), size of a list can be O(n). */
+            while (g_ClientDownMap.size() >= MAX_CLIENT_DOWN_SIZE)
+            {
+                ClientDownInfo *cInfo = g_ClientDownList.back();
+                g_ClientDownMap.erase(cInfo->uClient);
+                g_ClientDownList.pop_back();
+                NS_ASSERTION(g_ClientDownMap.size() == g_ClientDownList.size(),
+                             "client down info inconsistency during emergency evicting");
+                delete cInfo;
+            }
+
+            ClientDownInfo *cInfo = new ClientDownInfo(aSenderID);
+            RTMEM_MAY_LEAK(cInfo); /* tstVBoxAPIPerf leaks one allocated during ComPtr<IVirtualBoxClient>::createInprocObject(). */
+            g_ClientDownMap[aSenderID] = cInfo;
+            g_ClientDownList.push_front(cInfo);
+            NS_ASSERTION(g_ClientDownMap.size() == g_ClientDownList.size(),
+                         "client down info inconsistency after adding entry");
+        }
+        return (aSenderID == mPeer) ? NS_OK : IPC_WAIT_NEXT_MESSAGE;
+    }
+    // accept special "client up" messages for a given peer
+    // (empty target id, zero data and data length=1)
+    if (aTarget.Equals(nsID()) && !aData && aDataLen == 1)
+    {
+        ClientDownMap::iterator it = g_ClientDownMap.find(aSenderID);
+        if (it != g_ClientDownMap.end())
+        {
+            ClientDownInfo *cInfo = it->second;
+            g_ClientDownMap.erase(it);
+            g_ClientDownList.remove(cInfo);
+            NS_ASSERTION(g_ClientDownMap.size() == g_ClientDownList.size(),
+                         "client down info inconsistency in client up case");
+            delete cInfo;
+        }
+        return (aSenderID == mPeer) ? NS_OK : IPC_WAIT_NEXT_MESSAGE;
+    }
+    // accept special "client check" messages for an anonymous sender
+    // (invalid sender id, empty target id, zero data and data length
+    if (aSenderID == IPC_SENDER_ANY && aTarget.Equals(nsID()) && !aData && !aDataLen)
+    {
+        LOG(("DConnectMsgSelector::OnMessageAvailable: poll liveness for mPeer=%d\n",
+             mPeer));
+        ClientDownMap::iterator it = g_ClientDownMap.find(mPeer);
+        return (it == g_ClientDownMap.end()) ? IPC_WAIT_NEXT_MESSAGE : NS_OK;
+    }
+#endif /* VBOX */
+    const DConnectOp *op = (const DConnectOp *) aData;
+    // accept only reply messages with the given peer/opcode/index
+    // (to prevent eating replies the other thread might be waiting for)
+    // as well as any non-reply messages (to serve external requests that
+    // might arrive while we're waiting for the given reply).
+    if (aDataLen >= sizeof(DConnectOp) &&
+        ((op->opcode_major != DCON_OP_SETUP_REPLY &&
+	        op->opcode_major != DCON_OP_INVOKE_REPLY) ||
+         (aSenderID == mPeer &&
+          op->opcode_major == mOpCodeMajor &&
+          op->request_index == mRequestIndex)))
+      return NS_OK;
+    else
+      return IPC_WAIT_NEXT_MESSAGE;
+  }
+
+  const PRUint32 mPeer;
+  const PRUint8 mOpCodeMajor;
+  const PRUint32 mRequestIndex;
+};
+NS_IMPL_QUERY_INTERFACE1(DConnectMsgSelector, ipcIMessageObserver)
+
+class DConnectCompletion : public ipcIMessageObserver
+{
+public:
+  DConnectCompletion(PRUint32 peer, PRUint8 opCodeMajor, PRUint32 requestIndex)
+    : mSelector(peer, opCodeMajor, requestIndex)
+  {}
+
+  // stack based only
+  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
+  NS_IMETHOD_(nsrefcnt) Release() { return 1; }
+
+  NS_IMETHOD QueryInterface(const nsIID &aIID, void **aInstancePtr);
+
+  NS_IMETHOD OnMessageAvailable(PRUint32 aSenderID, const nsID &aTarget,
+                                const PRUint8 *aData, PRUint32 aDataLen)
+  {
+    const DConnectOp *op = (const DConnectOp *) aData;
+    LOG((
+      "DConnectCompletion::OnMessageAvailable: "
+      "senderID=%d, opcode_major=%d, index=%d (waiting for %d)\n",
+      aSenderID, op->opcode_major, op->request_index, mSelector.mRequestIndex
+    ));
+    if (aSenderID == mSelector.mPeer &&
+        op->opcode_major == mSelector.mOpCodeMajor &&
+        op->request_index == mSelector.mRequestIndex)
+    {
+      OnResponseAvailable(aSenderID, op, aDataLen);
+    }
+    else
+    {
+      // ensure ipcDConnectService is not deleted before we finish
+      nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+      if (dConnect)
+        dConnect->OnMessageAvailable(aSenderID, aTarget, aData, aDataLen);
+    }
+    return NS_OK;
+  }
+
+  virtual void OnResponseAvailable(PRUint32 sender, const DConnectOp *op, PRUint32 opLen) = 0;
+
+  DConnectMsgSelector &GetSelector()
+  {
+     return mSelector;
+  }
+
+protected:
+  DConnectMsgSelector mSelector;
+};
+NS_IMPL_QUERY_INTERFACE1(DConnectCompletion, ipcIMessageObserver)
+
+//-----------------------------------------------------------------------------
+
+class DConnectInvokeCompletion : public DConnectCompletion
+{
+public:
+  DConnectInvokeCompletion(PRUint32 peer, const DConnectInvoke *invoke)
+    : DConnectCompletion(peer, DCON_OP_INVOKE_REPLY, invoke->request_index)
+    , mReply(nsnull)
+    , mParamsLen(0)
+  {}
+
+  ~DConnectInvokeCompletion() { if (mReply) free(mReply); }
+
+  void OnResponseAvailable(PRUint32 sender, const DConnectOp *op, PRUint32 opLen)
+  {
+    mReply = (DConnectInvokeReply *) malloc(opLen);
+    memcpy(mReply, op, opLen);
+
+    // the length in bytes of the parameter blob
+    mParamsLen = opLen - sizeof(*mReply);
+  }
+
+  PRBool IsPending() const { return mReply == nsnull; }
+  nsresult GetResult() const { return mReply->result; }
+
+  const PRUint8 *Params() const { return (const PRUint8 *) (mReply + 1); }
+  PRUint32 ParamsLen() const { return mParamsLen; }
+
+  const DConnectInvokeReply *Reply() const { return mReply; }
+
+private:
+  DConnectInvokeReply *mReply;
+  PRUint32             mParamsLen;
+};
+
+//-----------------------------------------------------------------------------
+
+#define DCONNECT_STUB_ID                           \
+{ /* 132c1f14-5442-49cb-8fe6-e60214bbf1db */       \
+  0x132c1f14,                                      \
+  0x5442,                                          \
+  0x49cb,                                          \
+  {0x8f, 0xe6, 0xe6, 0x02, 0x14, 0xbb, 0xf1, 0xdb} \
+}
+static NS_DEFINE_IID(kDConnectStubID, DCONNECT_STUB_ID);
+
+// this class represents the non-local object instance.
+
+class DConnectStub : public nsXPTCStubBase
+{
+public:
+  NS_DECL_ISUPPORTS
+
+  DConnectStub(nsIInterfaceInfo *aIInfo,
+               DConAddr aInstance,
+               PRUint32 aPeerID)
+    : mIInfo(aIInfo)
+    , mInstance(aInstance)
+    , mPeerID(aPeerID)
+    , mCachedISupports(0)
+    , mRefCntLevels(0)
+    {}
+
+  NS_HIDDEN ~DConnectStub();
+
+  // return a refcounted pointer to the InterfaceInfo for this object
+  // NOTE: on some platforms this MUST not fail or we crash!
+  NS_IMETHOD GetInterfaceInfo(nsIInterfaceInfo **aInfo);
+
+  // call this method and return result
+  NS_IMETHOD CallMethod(PRUint16 aMethodIndex,
+                        const nsXPTMethodInfo *aInfo,
+                        nsXPTCMiniVariant *aParams);
+
+  DConAddr Instance() { return mInstance; }
+  PRUint32 PeerID()   { return mPeerID; }
+
+  DConnectStubKey::Key GetKey() {
+    return DConnectStubKey::Key(mPeerID, mInstance);
+  }
+
+  NS_IMETHOD_(nsrefcnt) AddRefIPC();
+
+private:
+  nsCOMPtr<nsIInterfaceInfo> mIInfo;
+
+  // uniquely identifies this object instance between peers.
+  DConAddr mInstance;
+
+  // the "client id" of our IPC peer.  this guy owns the real object.
+  PRUint32 mPeerID;
+
+  // cached nsISupports stub for this object
+  DConnectStub *mCachedISupports;
+
+  // stack of reference counter values (protected by
+  // ipcDConnectService::StubLock())
+  nsDeque mRefCntLevels;
+};
+
+NS_IMETHODIMP_(nsrefcnt)
+DConnectStub::AddRefIPC()
+{
+  // in this special version, we memorize the resulting reference count in the
+  // associated stack array. This stack is then used by Release() to determine
+  // when it is necessary to send a RELEASE request to the peer owning the
+  // object in order to balance AddRef() the peer does on DConnectInstance every
+  // time it passes an object over IPC.
+
+  // NOTE: this function is to be called from DConnectInstance::CreateStub only!
+
+  nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+  NS_ASSERTION(dConnect, "no ipcDConnectService (uninitialized?)");
+  if (!dConnect)
+    return 0;
+
+  // dConnect->StubLock() must be already locked here by
+  // DConnectInstance::CreateStub
+
+  nsrefcnt count = AddRef();
+  mRefCntLevels.Push((void *)(uintptr_t) count);
+  return count;
+}
+
+nsresult
+ipcDConnectService::CreateStub(const nsID &iid, PRUint32 peer, DConAddr instance,
+                               DConnectStub **result)
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIInterfaceInfo> iinfo;
+  rv = GetInterfaceInfo(iid, getter_AddRefs(iinfo));
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsAutoLock lock (mLock);
+
+  if (mDisconnected)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  // we also need the stub lock which protects DConnectStub::mRefCntLevels and
+  // ipcDConnectService::mStubs
+  nsAutoLock stubLock (mStubLock);
+
+  DConnectStub *stub = nsnull;
+
+  // first try to find an existing stub for a given peer and instance
+  // (we do not care about IID because every DConAddr instance represents
+  // exactly one interface of the real object on the peer's side)
+  if (!mStubs.Get(DConnectStubKey::Key(peer, instance), &stub))
+  {
+    stub = new DConnectStub(iinfo, instance, peer);
+
+    if (NS_UNLIKELY(!stub))
+      rv = NS_ERROR_OUT_OF_MEMORY;
+    else
+    {
+      rv = StoreStub(stub);
+      if (NS_FAILED(rv))
+        delete stub;
+    }
+  }
+
+  if (NS_SUCCEEDED(rv))
+  {
+    stub->AddRefIPC();
+    *result = stub;
+  }
+
+  return rv;
+}
+
+nsresult
+ipcDConnectService::SerializeInterfaceParam(ipcMessageWriter &writer,
+                                            PRUint32 peer, const nsID &iid,
+                                            nsISupports *obj,
+                                            nsVoidArray &wrappers)
+{
+  nsAutoLock lock (mLock);
+
+  if (mDisconnected)
+      return NS_ERROR_NOT_INITIALIZED;
+
+  // we create an instance wrapper, and assume that the other side will send a
+  // RELEASE message when it no longer needs the instance wrapper.  that will
+  // usually happen after the call returns.
+  //
+  // XXX a lazy scheme might be better, but for now simplicity wins.
+
+  // if the interface pointer references a DConnectStub corresponding
+  // to an object in the address space of the peer, then no need to
+  // create a new wrapper.
+
+  // if the interface pointer references an object for which we already have
+  // an existing wrapper, then we use it instead of creating a new one.  this
+  // is based on the assumption that a valid COM object always returns exactly
+  // the same pointer value in response to every
+  // QueryInterface(NS_GET_IID(nsISupports), ...).
+
+  if (!obj)
+  {
+    // write null address
+    DConAddr nullobj = 0;
+    writer.PutBytes(&nullobj, sizeof(nullobj));
+  }
+  else
+  {
+    DConnectStub *stub = nsnull;
+    nsresult rv = obj->QueryInterface(kDConnectStubID, (void **) &stub);
+    if (NS_SUCCEEDED(rv) && (stub->PeerID() == peer))
+    {
+      DConAddr p = stub->Instance();
+      writer.PutBytes(&p, sizeof(p));
+    }
+    else
+    {
+      // create instance wrapper
+
+      nsCOMPtr<nsIInterfaceInfo> iinfo;
+      rv = GetInterfaceInfo(iid, getter_AddRefs(iinfo));
+      if (NS_FAILED(rv))
+        return rv;
+
+      DConnectInstance *wrapper = nsnull;
+
+      // first try to find an existing wrapper for the given object
+      if (!FindInstanceAndAddRef(peer, obj, &iid, &wrapper))
+      {
+        wrapper = new DConnectInstance(peer, iinfo, obj);
+        if (!wrapper)
+          return NS_ERROR_OUT_OF_MEMORY;
+
+        rv = StoreInstance(wrapper);
+        if (NS_FAILED(rv))
+        {
+          delete wrapper;
+          return rv;
+        }
+
+        // reference the newly created wrapper
+        wrapper->AddRef();
+      }
+
+      // increase the second, IPC-only, reference counter (mandatory before
+      // trying wrappers.AppendElement() to make sure ReleaseIPC() will remove
+      // the wrapper from the instance map on failure)
+      wrapper->AddRefIPC();
+
+      if (!wrappers.AppendElement(wrapper))
+      {
+        wrapper->ReleaseIPC();
+        wrapper->Release();
+        return NS_ERROR_OUT_OF_MEMORY;
+      }
+
+      // wrapper remains referenced when passing it to the client
+      // (will be released upon DCON_OP_RELEASE)
+
+      // send address of the instance wrapper, and set the low bit to indicate
+      // to the remote party that this is a remote instance wrapper.
+      PtrBits bits = ((PtrBits)(uintptr_t) wrapper);
+      NS_ASSERTION((bits & PTRBITS_REMOTE_BIT) == 0, "remote bit wrong)");
+      bits |= PTRBITS_REMOTE_BIT;
+      writer.PutBytes(&bits, sizeof(bits));
+    }
+    NS_IF_RELEASE(stub);
+  }
+  return NS_OK;
+}
+
+// NOTE: peer and iid are ignored if bits doesn't contain PTRBITS_REMOTE_BIT
+nsresult
+ipcDConnectService::DeserializeInterfaceParamBits(PtrBits bits, PRUint32 peer,
+                                                  const nsID &iid,
+                                                  nsISupports *&obj)
+{
+  nsresult rv;
+
+  obj = nsnull;
+
+  if (bits & PTRBITS_REMOTE_BIT)
+  {
+    // pointer is to a remote object.  we need to build a stub.
+
+    bits &= ~PTRBITS_REMOTE_BIT;
+
+    DConnectStub *stub;
+    rv = CreateStub(iid, peer, (DConAddr) bits, &stub);
+    if (NS_SUCCEEDED(rv))
+      obj = stub;
+  }
+  else if (bits)
+  {
+    // pointer is to one of our instance wrappers. Replace it with the
+    // real instance.
+
+    DConnectInstance *wrapper = (DConnectInstance *) bits;
+    // make sure we've been sent a valid wrapper
+    if (!CheckInstanceAndAddRef(wrapper, peer))
+    {
+      NS_NOTREACHED("instance wrapper not found");
+      return NS_ERROR_INVALID_ARG;
+    }
+    obj = wrapper->RealInstance();
+    NS_ADDREF(obj);
+    NS_RELEASE(wrapper);
+  }
+  else
+  {
+    // obj is alredy nsnull
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+
+#define EXCEPTION_STUB_ID                          \
+{ /* 70578d68-b25e-4370-a70c-89bbe56e6699 */       \
+  0x70578d68,                                      \
+  0xb25e,                                          \
+  0x4370,                                          \
+  {0xa7, 0x0c, 0x89, 0xbb, 0xe5, 0x6e, 0x66, 0x99} \
+}
+static NS_DEFINE_IID(kExceptionStubID, EXCEPTION_STUB_ID);
+
+// ExceptionStub is used to cache all primitive-typed bits of a remote nsIException
+// instance (such as the error message or line number) to:
+//
+// a) reduce the number of IPC calls;
+// b) make sure exception information is available to the calling party even if
+//    the called party terminates immediately after returning an exception.
+//    To achieve this, all cacheable information is serialized together with
+//    the instance wrapper itself.
+
+class ExceptionStub : public nsIException
+{
+public:
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIEXCEPTION
+
+  ExceptionStub(const nsACString &aMessage, nsresult aResult,
+                const nsACString &aName, const nsACString &aFilename,
+                PRUint32 aLineNumber, PRUint32 aColumnNumber,
+                DConnectStub *aXcptStub)
+    : mMessage(aMessage), mResult(aResult)
+    , mName(aName), mFilename(aFilename)
+    , mLineNumber (aLineNumber), mColumnNumber (aColumnNumber)
+    , mXcptStub (aXcptStub) { NS_ASSERTION(aXcptStub, "NULL"); }
+
+  ~ExceptionStub() {}
+
+  nsIException *Exception() { return (nsIException *)(nsISupports *) mXcptStub; }
+  DConnectStub *Stub() { return mXcptStub; }
+
+private:
+
+  nsCString mMessage;
+  nsresult mResult;
+  nsCString mName;
+  nsCString mFilename;
+  PRUint32 mLineNumber;
+  PRUint32 mColumnNumber;
+  nsRefPtr<DConnectStub> mXcptStub;
+};
+
+NS_IMPL_THREADSAFE_ADDREF(ExceptionStub)
+NS_IMPL_THREADSAFE_RELEASE(ExceptionStub)
+
+NS_IMETHODIMP
+ExceptionStub::QueryInterface(const nsID &aIID, void **aInstancePtr)
+{
+  NS_ASSERTION(aInstancePtr,
+               "QueryInterface requires a non-NULL destination!");
+
+  // used to discover if this is an ExceptionStub instance.
+  if (aIID.Equals(kExceptionStubID))
+  {
+    *aInstancePtr = this;
+    NS_ADDREF_THIS();
+    return NS_OK;
+  }
+
+  // regular NS_IMPL_QUERY_INTERFACE1 sequence
+
+  nsISupports* foundInterface = 0;
+
+  if (aIID.Equals(NS_GET_IID(nsIException)))
+    foundInterface = NS_STATIC_CAST(nsIException*, this);
+  else
+  if (aIID.Equals(NS_GET_IID(nsISupports)))
+    foundInterface = NS_STATIC_CAST(nsISupports*,
+                                    NS_STATIC_CAST(nsIException *, this));
+  else
+  if (mXcptStub)
+  {
+    // ask the real nsIException object
+    return mXcptStub->QueryInterface(aIID, aInstancePtr);
+  }
+
+  nsresult status;
+  if (!foundInterface)
+    status = NS_NOINTERFACE;
+  else
+  {
+    NS_ADDREF(foundInterface);
+    status = NS_OK;
+  }
+  *aInstancePtr = foundInterface;
+  return status;
+}
+
+/* readonly attribute string message; */
+NS_IMETHODIMP ExceptionStub::GetMessage(char **aMessage)
+{
+  AssertReturn(aMessage, NS_ERROR_INVALID_POINTER);
+  *aMessage = ToNewCString(mMessage);
+  return NS_OK;
+}
+
+/* readonly attribute nsresult result; */
+NS_IMETHODIMP ExceptionStub::GetResult(nsresult *aResult)
+{
+  AssertReturn(aResult, NS_ERROR_INVALID_POINTER);
+  *aResult = mResult;
+  return NS_OK;
+}
+
+/* readonly attribute string name; */
+NS_IMETHODIMP ExceptionStub::GetName(char **aName)
+{
+  AssertReturn(aName, NS_ERROR_INVALID_POINTER);
+  *aName = ToNewCString(mName);
+  return NS_OK;
+}
+
+/* readonly attribute string filename; */
+NS_IMETHODIMP ExceptionStub::GetFilename(char **aFilename)
+{
+  AssertReturn(aFilename, NS_ERROR_INVALID_POINTER);
+  *aFilename = ToNewCString(mFilename);
+  return NS_OK;
+}
+
+/* readonly attribute PRUint32 lineNumber; */
+NS_IMETHODIMP ExceptionStub::GetLineNumber(PRUint32 *aLineNumber)
+{
+  AssertReturn(aLineNumber, NS_ERROR_INVALID_POINTER);
+  *aLineNumber = mLineNumber;
+  return NS_OK;
+}
+
+/* readonly attribute PRUint32 columnNumber; */
+NS_IMETHODIMP ExceptionStub::GetColumnNumber(PRUint32 *aColumnNumber)
+{
+  AssertReturn(aColumnNumber, NS_ERROR_INVALID_POINTER);
+  *aColumnNumber = mColumnNumber;
+  return NS_OK;
+}
+
+/* readonly attribute nsIStackFrame location; */
+NS_IMETHODIMP ExceptionStub::GetLocation(nsIStackFrame **aLocation)
+{
+  if (Exception())
+    return Exception()->GetLocation (aLocation);
+  return NS_ERROR_UNEXPECTED;
+}
+
+/* readonly attribute nsIException inner; */
+NS_IMETHODIMP ExceptionStub::GetInner(nsIException **aInner)
+{
+  if (Exception())
+    return Exception()->GetInner (aInner);
+  return NS_ERROR_UNEXPECTED;
+}
+
+/* readonly attribute nsISupports data; */
+NS_IMETHODIMP ExceptionStub::GetData(nsISupports * *aData)
+{
+  if (Exception())
+    return Exception()->GetData (aData);
+  return NS_ERROR_UNEXPECTED;
+}
+
+/* string toString (); */
+NS_IMETHODIMP ExceptionStub::ToString(char **_retval)
+{
+  if (Exception())
+    return Exception()->ToString (_retval);
+  return NS_ERROR_UNEXPECTED;
+}
+
+nsresult
+ipcDConnectService::SerializeException(ipcMessageWriter &writer,
+                                       PRUint32 peer, nsIException *xcpt,
+                                       nsVoidArray &wrappers)
+{
+  PRBool cache_fields = PR_FALSE;
+
+  // first, seralize the nsIException pointer.  The code is merely the same as
+  // in SerializeInterfaceParam() except that when the exception to serialize
+  // is an ExceptionStub instance and the real instance it stores as mXcpt
+  // is a DConnectStub corresponding to an object in the address space of the
+  // peer, we simply pass that object back instead of creating a new wrapper.
+
+  {
+    nsAutoLock lock (mLock);
+
+    if (mDisconnected)
+      return NS_ERROR_NOT_INITIALIZED;
+
+    if (!xcpt)
+    {
+      // write null address
+#ifdef VBOX
+      // see ipcDConnectService::DeserializeException()!
+      PtrBits bits = 0;
+      writer.PutBytes(&bits, sizeof(bits));
+#else
+      writer.PutBytes(&xcpt, sizeof(xcpt));
+#endif
+    }
+    else
+    {
+      ExceptionStub *stub = nsnull;
+      nsresult rv = xcpt->QueryInterface(kExceptionStubID, (void **) &stub);
+      if (NS_SUCCEEDED(rv) && (stub->Stub()->PeerID() == peer))
+      {
+        // send the wrapper instance back to the peer
+        DConAddr p = stub->Stub()->Instance();
+        writer.PutBytes(&p, sizeof(p));
+      }
+      else
+      {
+        // create instance wrapper
+
+        const nsID &iid = nsIException::GetIID();
+        nsCOMPtr<nsIInterfaceInfo> iinfo;
+        rv = GetInterfaceInfo(iid, getter_AddRefs(iinfo));
+        if (NS_FAILED(rv))
+          return rv;
+
+        DConnectInstance *wrapper = nsnull;
+
+        // first try to find an existing wrapper for the given object
+        if (!FindInstanceAndAddRef(peer, xcpt, &iid, &wrapper))
+        {
+          wrapper = new DConnectInstance(peer, iinfo, xcpt);
+          if (!wrapper)
+            return NS_ERROR_OUT_OF_MEMORY;
+
+          rv = StoreInstance(wrapper);
+          if (NS_FAILED(rv))
+          {
+            delete wrapper;
+            return rv;
+          }
+
+          // reference the newly created wrapper
+          wrapper->AddRef();
+        }
+
+        // increase the second, IPC-only, reference counter (mandatory before
+        // trying wrappers.AppendElement() to make sure ReleaseIPC() will remove
+        // the wrapper from the instance map on failure)
+        wrapper->AddRefIPC();
+
+        if (!wrappers.AppendElement(wrapper))
+        {
+          wrapper->ReleaseIPC();
+          wrapper->Release();
+          return NS_ERROR_OUT_OF_MEMORY;
+        }
+
+        // wrapper remains referenced when passing it to the client
+        // (will be released upon DCON_OP_RELEASE)
+
+        // send address of the instance wrapper, and set the low bit to indicate
+        // to the remote party that this is a remote instance wrapper.
+        PtrBits bits = ((PtrBits)(uintptr_t) wrapper) | PTRBITS_REMOTE_BIT;
+        writer.PutBytes(&bits, sizeof(bits));
+
+        // we want to cache fields to minimize the number of IPC calls when
+        // accessing exception data on the peer side
+        cache_fields = PR_TRUE;
+      }
+      NS_IF_RELEASE(stub);
+    }
+  }
+
+  if (!cache_fields)
+    return NS_OK;
+
+  nsresult rv;
+  nsXPIDLCString str;
+  PRUint32 num;
+
+  // message
+  rv = xcpt->GetMessage(getter_Copies(str));
+  if (NS_SUCCEEDED (rv))
+  {
+    PRUint32 len = str.Length();
+    nsACString::const_iterator begin;
+    const char *data = str.BeginReading(begin).get();
+    writer.PutInt32(len);
+    writer.PutBytes(data, len);
+  }
+  else
+    writer.PutInt32(0);
+
+  // result
+  nsresult res = 0;
+  xcpt->GetResult(&res);
+  writer.PutInt32(res);
+
+  // name
+  rv = xcpt->GetName(getter_Copies(str));
+  if (NS_SUCCEEDED (rv))
+  {
+    PRUint32 len = str.Length();
+    nsACString::const_iterator begin;
+    const char *data = str.BeginReading(begin).get();
+    writer.PutInt32(len);
+    writer.PutBytes(data, len);
+  }
+  else
+    writer.PutInt32(0);
+
+  // filename
+  rv = xcpt->GetFilename(getter_Copies(str));
+  if (NS_SUCCEEDED (rv))
+  {
+    PRUint32 len = str.Length();
+    nsACString::const_iterator begin;
+    const char *data = str.BeginReading(begin).get();
+    writer.PutInt32(len);
+    writer.PutBytes(data, len);
+  }
+  else
+    writer.PutInt32(0);
+
+  // lineNumber
+  num = 0;
+  xcpt->GetLineNumber(&num);
+  writer.PutInt32(num);
+
+  // columnNumber
+  num = 0;
+  xcpt->GetColumnNumber(&num);
+  writer.PutInt32(num);
+
+  return writer.HasError() ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
+}
+
+nsresult
+ipcDConnectService::DeserializeException(ipcMessageReader &reader,
+                                         PRUint32 peer,
+                                         nsIException **xcpt)
+{
+  NS_ASSERTION (xcpt, "NULL");
+  if (!xcpt)
+    return NS_ERROR_INVALID_POINTER;
+
+  nsresult rv;
+  PRUint32 len;
+
+  PtrBits bits = 0;
+  reader.GetBytes(&bits, sizeof(DConAddr));
+  if (reader.HasError())
+    return NS_ERROR_INVALID_ARG;
+
+  if (bits & PTRBITS_REMOTE_BIT)
+  {
+    // pointer is a peer-side exception instance wrapper,
+    // read cahced exception data and create a stub for it.
+
+    nsCAutoString message;
+    len = reader.GetInt32();
+    if (len)
+    {
+      message.SetLength(len);
+      char *buf = message.BeginWriting();
+      reader.GetBytes(buf, len);
+    }
+
+    nsresult result = reader.GetInt32();
+
+    nsCAutoString name;
+    len = reader.GetInt32();
+    if (len)
+    {
+      name.SetLength(len);
+      char *buf = name.BeginWriting();
+      reader.GetBytes(buf, len);
+    }
+
+    nsCAutoString filename;
+    len = reader.GetInt32();
+    if (len)
+    {
+      filename.SetLength(len);
+      char *buf = filename.BeginWriting();
+      reader.GetBytes(buf, len);
+    }
+
+    PRUint32 lineNumber = reader.GetInt32();
+    PRUint32 columnNumber = reader.GetInt32();
+
+    if (reader.HasError())
+      rv = NS_ERROR_INVALID_ARG;
+    else
+    {
+      DConAddr addr = (DConAddr) (bits & ~PTRBITS_REMOTE_BIT);
+      nsRefPtr<DConnectStub> stub;
+      rv = CreateStub(nsIException::GetIID(), peer, addr,
+                      getter_AddRefs(stub));
+      if (NS_SUCCEEDED(rv))
+      {
+        // create a special exception "stub" with cached error info
+        ExceptionStub *xcptStub =
+          new ExceptionStub (message, result,
+                             name, filename,
+                             lineNumber, columnNumber,
+                             stub);
+        if (xcptStub)
+        {
+          *xcpt = xcptStub;
+          NS_ADDREF(xcptStub);
+        }
+        else
+          rv = NS_ERROR_OUT_OF_MEMORY;
+      }
+    }
+  }
+  else if (bits)
+  {
+    // pointer is to our instance wrapper for nsIException we've sent before
+    // (the remote method we've called had called us back and got an exception
+    // from us that it decided to return as its own result). Replace it with
+    // the real instance.
+    DConnectInstance *wrapper = (DConnectInstance *) bits;
+    if (CheckInstanceAndAddRef(wrapper, peer))
+    {
+      *xcpt = (nsIException *) wrapper->RealInstance();
+      NS_ADDREF(wrapper->RealInstance());
+      wrapper->Release();
+      rv = NS_OK;
+    }
+    else
+    {
+      NS_NOTREACHED("instance wrapper not found");
+      rv = NS_ERROR_INVALID_ARG;
+    }
+  }
+  else
+  {
+    // the peer explicitly passed us a NULL exception to indicate that the
+    // exception on the current thread should be reset
+    *xcpt = NULL;
+    return NS_OK;
+  }
+
+
+  return rv;
+}
+
+//-----------------------------------------------------------------------------
+
+DConnectStub::~DConnectStub()
+{
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name = NULL;
+    mIInfo->GetNameShared(&name);
+    LOG(("{%p} DConnectStub::<dtor>(): peer=%d instance=0x%Lx {%s}\n",
+         this, mPeerID, mInstance, name));
+  }
+#endif
+
+  // release the cached nsISupports instance if it's not the same object
+  if (mCachedISupports != 0 && mCachedISupports != this)
+    NS_RELEASE(mCachedISupports);
+}
+
+NS_IMETHODIMP_(nsrefcnt)
+DConnectStub::AddRef()
+{
+  nsrefcnt count;
+  count = PR_AtomicIncrement((PRInt32*)&mRefCnt);
+  NS_LOG_ADDREF(this, count, "DConnectStub", sizeof(*this));
+  return count;
+}
+
+NS_IMETHODIMP_(nsrefcnt)
+DConnectStub::Release()
+{
+  nsrefcnt count;
+
+  nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+  if (dConnect)
+  {
+    // lock the stub lock on every release to make sure that once the counter
+    // drops to zero, we delete the stub from the set of stubs before a new
+    // request to create a stub on other thread tries to find the existing
+    // stub in the set (wchich could otherwise AddRef the object after it had
+    // Released to zero and pass it to the client right before its
+    // destruction).
+    nsAutoLock stubLock (dConnect->StubLock());
+
+    count = PR_AtomicDecrement((PRInt32 *)&mRefCnt);
+    NS_LOG_RELEASE(this, count, "DConnectStub");
+
+
+    #ifdef IPC_LOGGING
+    if (IPC_LOG_ENABLED())
+    {
+      const char *name;
+      mIInfo->GetNameShared(&name);
+      LOG(("{%p} DConnectStub::Release(): peer=%d instance=0x%Lx {%s}, new count=%d\n",
+          this, mPeerID, mInstance, name, count));
+    }
+    #endif
+
+    // mRefCntLevels may already be empty here (due to the "stabilize" trick below)
+    if (mRefCntLevels.GetSize() > 0)
+    {
+      nsrefcnt top = (nsrefcnt) (long) mRefCntLevels.Peek();
+      NS_ASSERTION(top <= count + 1, "refcount is beyond the top level");
+
+      if (top == count + 1)
+      {
+        // refcount dropped to a value stored in ipcDConnectService::CreateStub.
+        // Send a RELEASE request to the peer (see also AddRefIPC).
+
+        // remove the top refcount value
+        mRefCntLevels.Pop();
+
+        if (0 == count)
+        {
+          // this is the last reference, remove from the set before we leave
+          // the lock, to provide atomicity of these two operations
+          dConnect->DeleteStub (this);
+
+          NS_ASSERTION(mRefCntLevels.GetSize() == 0, "refcnt levels are still left");
+        }
+
+        // leave the lock before sending a message
+        stubLock.unlock();
+
+        nsresult rv;
+
+        DConnectRelease msg;
+        msg.opcode_major = DCON_OP_RELEASE;
+        msg.opcode_minor = 0;
+        msg.flags = 0;
+        msg.request_index = 0; // not used, set to some unused value
+        msg.instance = mInstance;
+
+        // fire off asynchronously... we don't expect any response to this message.
+        rv = IPC_SendMessage(mPeerID, kDConnectTargetID,
+                           (const PRUint8 *) &msg, sizeof(msg));
+        if (NS_FAILED(rv))
+          NS_WARNING("failed to send RELEASE event");
+      }
+    }
+  }
+  else
+  {
+    count = PR_AtomicDecrement((PRInt32 *)&mRefCnt);
+    NS_LOG_RELEASE(this, count, "DConnectStub");
+  }
+
+  if (0 == count)
+  {
+    mRefCnt = 1; /* stabilize */
+    delete this;
+    return 0;
+  }
+
+  return count;
+}
+
+NS_IMETHODIMP
+DConnectStub::QueryInterface(const nsID &aIID, void **aInstancePtr)
+{
+  // used to discover if this is a DConnectStub instance.
+  if (aIID.Equals(kDConnectStubID))
+  {
+    *aInstancePtr = this;
+    NS_ADDREF_THIS();
+    return NS_OK;
+  }
+
+  // In order to truely support the COM Identity Rule across processes,
+  // we need to make the following code work:
+  //
+  //   IFoo *foo = ...
+  //   nsISupports unk;
+  //   foo->QueryInterface(NS_GET_IID(nsISupports), (void **) &unk);
+  //   unk->Release();
+  //   nsISupports unk2;
+  //   foo->QueryInterface(NS_GET_IID(nsISupports), (void **) &unk2);
+  //   Assert (unk == unk2);
+  //
+  // I.e. querying nsISupports on the same object must always return the same
+  // pointer, even if the nsISupports object returned for the first time is
+  // released before it is requested for the second time, as long as the
+  // original object is kept alive (referenced by the client) between these
+  // two queries.
+  //
+  // This is done by remembering the nsISupports stub returned by the peer
+  // when nsISupports is queried for the first time. The remembered stub, when
+  // it is not the same as this object, is strongly referenced in order to
+  // keep it alive (and therefore have the same pointer value) as long as this
+  // object is alive.
+  //
+  // Besides supporting the Identity Rule, this also reduces the number of IPC
+  // calls, since an IPC call requesting nsISupports will be done only once
+  // per every stub object.
+
+  nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+  NS_ASSERTION(dConnect, "no ipcDConnectService (uninitialized?)");
+  if (!dConnect)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  nsresult rv;
+  PRBool needISupports = aIID.Equals(NS_GET_IID(nsISupports));
+
+  if (needISupports)
+  {
+    // XXX it would be sufficient to use cmpxchg here to protect access to
+    // mCachedISupports, but NSPR doesn't provide cross-platform cmpxchg
+    // functionality, so we have to use a shared lock instead...
+    PR_Lock(dConnect->StubQILock());
+
+    // check if we have already got a nsISupports stub for this object
+    if (mCachedISupports != 0)
+    {
+      *aInstancePtr = mCachedISupports;
+      NS_ADDREF(mCachedISupports);
+
+      PR_Unlock(dConnect->StubQILock());
+      return NS_OK;
+    }
+
+    // check if this object is nsISupports itself
+    {
+      nsIID *iid = 0;
+      rv = mIInfo->GetInterfaceIID(&iid);
+      NS_ASSERTION(NS_SUCCEEDED(rv) && iid,
+                   "nsIInterfaceInfo::GetInterfaceIID failed");
+      if (NS_SUCCEEDED(rv) && iid &&
+          iid->Equals(NS_GET_IID(nsISupports)))
+      {
+        nsMemory::Free((void*)iid);
+
+        // nsISupports is queried on nsISupports, return ourselves
+        *aInstancePtr = this;
+        NS_ADDREF_THIS();
+        // cache ourselves weakly
+        mCachedISupports = this;
+
+        PR_Unlock(dConnect->StubQILock());
+        return NS_OK;
+      }
+      if (iid)
+        nsMemory::Free((void*)iid);
+    }
+
+    // stub lock remains held until we've queried the peer
+  }
+
+  // else, we need to query the peer object by making an IPC call
+
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    mIInfo->GetNameShared(&name);
+    const char *nameQ;
+    nsCOMPtr <nsIInterfaceInfo> iinfoQ;
+    dConnect->GetInterfaceInfo(aIID, getter_AddRefs(iinfoQ));
+    if (iinfoQ) {
+        iinfoQ->GetNameShared(&nameQ);
+        LOG(("calling QueryInterface {%s} on peer object "
+             "(stub=%p, instance=0x%Lx {%s})\n",
+             nameQ, this, mInstance, name));
+    }
+  }
+#endif
+
+  DConnectSetupQueryInterface msg;
+  msg.opcode_minor = DCON_OP_SETUP_QUERY_INTERFACE;
+  msg.iid = aIID;
+  msg.instance = mInstance;
+
+  rv = SetupPeerInstance(mPeerID, &msg, sizeof(msg), aInstancePtr);
+
+  if (needISupports)
+  {
+    if (NS_SUCCEEDED(rv))
+    {
+      // cache the nsISupports object (SetupPeerInstance returns DConnectStub)
+      mCachedISupports = (DConnectStub *) *aInstancePtr;
+      // use a weak reference if nsISupports is the same object as us
+      if (this != mCachedISupports)
+        NS_ADDREF(mCachedISupports);
+    }
+
+    PR_Unlock(dConnect->StubQILock());
+  }
+
+  return rv;
+}
+
+NS_IMETHODIMP
+DConnectStub::GetInterfaceInfo(nsIInterfaceInfo **aInfo)
+{
+  NS_ADDREF(*aInfo = mIInfo);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+DConnectStub::CallMethod(PRUint16 aMethodIndex,
+                         const nsXPTMethodInfo *aInfo,
+                         nsXPTCMiniVariant *aParams)
+{
+  LOG(("DConnectStub::CallMethod [methodIndex=%hu]\n", aMethodIndex));
+
+  nsresult rv;
+
+  // reset the exception early.  this is necessary because we may return a
+  // failure from here without setting an exception (which might be expected
+  // by the caller to detect the error origin: the interface we are stubbing
+  // may indicate in some way that it always sets the exception info on
+  // failure, therefore an "infoless" failure means the origin is RPC).
+  // besides that, resetting the excetion before every IPC call is exactly the
+  // same thing as Win32 RPC does, so doing this is useful for getting
+  // similarity in behaviors.
+
+  nsCOMPtr <nsIExceptionService> es;
+  es = do_GetService (NS_EXCEPTIONSERVICE_CONTRACTID, &rv);
+  if (NS_FAILED (rv))
+    return rv;
+  nsCOMPtr <nsIExceptionManager> em;
+  rv = es->GetCurrentExceptionManager (getter_AddRefs(em));
+  if (NS_FAILED (rv))
+    return rv;
+  rv = em->SetCurrentException(NULL);
+  if (NS_FAILED (rv))
+    return rv;
+
+  // ensure ipcDConnectService is not deleted before we finish
+  nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+  if (!dConnect)
+    return NS_ERROR_FAILURE;
+
+  // dump arguments
+
+  PRUint8 i, paramCount = aInfo->GetParamCount();
+
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    nsCOMPtr<nsIInterfaceInfo> iinfo;
+    GetInterfaceInfo(getter_AddRefs(iinfo));
+    iinfo->GetNameShared(&name);
+    LOG(("  instance=0x%Lx {%s}\n", mInstance, name));
+    LOG(("  name=%s\n", aInfo->GetName()));
+    LOG(("  param-count=%u\n", (PRUint32) paramCount));
+  }
+#endif
+
+
+  ipcMessageWriter writer(16 * paramCount);
+
+  // INVOKE message header
+  DConnectInvoke invoke;
+  invoke.opcode_major = DCON_OP_INVOKE;
+  invoke.opcode_minor = 0;
+  invoke.flags = 0;
+  invoke.request_index = NewRequestIndex();
+  invoke.instance = mInstance;
+  invoke.method_index = aMethodIndex;
+
+  LOG(("  request-index=%d\n", (PRUint32) invoke.request_index));
+
+  writer.PutBytes(&invoke, sizeof(invoke));
+
+  // list of wrappers that get created during parameter serialization.  if we
+  // are unable to send the INVOKE message, then we'll clean these up.
+  nsVoidArray wrappers;
+
+  for (i=0; i<paramCount; ++i)
+  {
+    const nsXPTParamInfo &paramInfo = aInfo->GetParam(i);
+
+    if (paramInfo.IsIn() && !paramInfo.IsDipper())
+    {
+      const nsXPTType &type = paramInfo.GetType();
+
+      if (type.IsInterfacePointer())
+      {
+        nsID iid;
+        rv = dConnect->GetIIDForMethodParam(mIInfo, aInfo, paramInfo, type,
+                                             aMethodIndex, aParams, PR_FALSE, iid);
+        if (NS_SUCCEEDED(rv))
+          rv = dConnect->SerializeInterfaceParam(writer, mPeerID, iid,
+                                                 (nsISupports *) aParams[i].val.p,
+                                                 wrappers);
+      }
+      else
+        rv = SerializeParam(writer, type, aParams[i]);
+
+      AssertMsgBreak(NS_SUCCEEDED(rv), ("i=%d rv=%#x\n", i, rv));
+    }
+    else if ((paramInfo.IsOut() || paramInfo.IsRetval()) && !aParams[i].val.p)
+    {
+      // report error early if NULL pointer is passed as an output parameter
+      rv = NS_ERROR_NULL_POINTER;
+      AssertMsgFailedBreak(("i=%d IsOut=%d IsRetval=%d NS_ERROR_NULL_POINTER\n", i, paramInfo.IsOut(), paramInfo.IsRetval()));
+      break;
+    }
+  }
+
+  if (NS_FAILED(rv))
+  {
+    // INVOKE message wasn't sent; clean up wrappers
+    dConnect->ReleaseWrappers(wrappers, mPeerID);
+    return rv;
+  }
+
+  // serialize input array parameters after everything else since the
+  // deserialization procedure will need to get a size_is value which may be
+  // stored in any preceeding or following param
+  for (i=0; i<paramCount; ++i)
+  {
+    const nsXPTParamInfo &paramInfo = aInfo->GetParam(i);
+
+    if (paramInfo.GetType().IsArray() &&
+        paramInfo.IsIn() && !paramInfo.IsDipper())
+    {
+      rv = SerializeArrayParam(dConnect, writer, mPeerID, mIInfo, aMethodIndex,
+                               *aInfo, aParams, PR_FALSE, paramInfo,
+                               aParams[i].val.p, wrappers);
+      if (NS_FAILED(rv))
+      {
+        // INVOKE message wasn't sent; clean up wrappers
+        dConnect->ReleaseWrappers(wrappers, mPeerID);
+        return rv;
+      }
+    }
+  }
+
+  // temporarily disable the DConnect target observer to block normal processing
+  // of pending messages through the event queue.
+  IPC_DISABLE_MESSAGE_OBSERVER_FOR_SCOPE(kDConnectTargetID);
+
+  rv = IPC_SendMessage(mPeerID, kDConnectTargetID,
+                       writer.GetBuffer(),
+                       writer.GetSize());
+  LOG(("DConnectStub::CallMethod: IPC_SendMessage()=%08X\n", rv));
+  if (NS_FAILED(rv))
+  {
+    // INVOKE message wasn't delivered; clean up wrappers
+    dConnect->ReleaseWrappers(wrappers, mPeerID);
+    return rv;
+  }
+
+  // now, we wait for the method call to complete.  during that time, it's
+  // possible that we'll receive other method call requests.  we'll process
+  // those while waiting for out method call to complete.  it's critical that
+  // we do so since those other method calls might need to complete before
+  // out method call can complete!
+
+  DConnectInvokeCompletion completion(mPeerID, &invoke);
+
+  do
+  {
+    rv = IPC_WaitMessage(IPC_SENDER_ANY, kDConnectTargetID,
+                         &completion.GetSelector(), &completion,
+                         DCON_WAIT_TIMEOUT);
+    LOG(("DConnectStub::CallMethod: IPC_WaitMessage()=%08X\n", rv));
+    if (NS_FAILED(rv))
+    {
+      // INVOKE message wasn't received; clean up wrappers
+      dConnect->ReleaseWrappers(wrappers, mPeerID);
+      return rv;
+    }
+  }
+  while (completion.IsPending());
+
+  ipcMessageReader reader(completion.Params(), completion.ParamsLen());
+
+  rv = completion.GetResult();
+  if (NS_SUCCEEDED(rv))
+  {
+    PRUint8 i;
+
+    // handle out-params and retvals: DCON_OP_INVOKE_REPLY has the data
+    for (i=0; i<paramCount; ++i)
+    {
+      const nsXPTParamInfo &paramInfo = aInfo->GetParam(i);
+
+      if (paramInfo.IsOut() || paramInfo.IsRetval())
+        DeserializeResult(reader, paramInfo.GetType(), aParams[i]);
+    }
+
+    // fixup any interface pointers using a second pass so we can properly
+    // handle INTERFACE_IS referencing an IID that is an out param! This pass is
+    // also used to deserialize arrays (array data goes after all other params).
+    for (i=0; i<paramCount && NS_SUCCEEDED(rv); ++i)
+    {
+      const nsXPTParamInfo &paramInfo = aInfo->GetParam(i);
+      if ((paramInfo.IsOut() || paramInfo.IsRetval()) && aParams[i].val.p)
+      {
+        const nsXPTType &type = paramInfo.GetType();
+        if (type.IsInterfacePointer())
+        {
+          // grab the DConAddr value temporarily stored in the param, restore
+          // the pointer and free the temporarily allocated memory.
+          DConAddrPlusPtr *dptr = (DConAddrPlusPtr *)aParams[i].val.p;
+          PtrBits bits = dptr->addr;
+          aParams[i].val.p = dptr->p;
+          nsMemory::Free((void *)dptr);
+
+          // DeserializeInterfaceParamBits needs IID only if it's a remote object
+          nsID iid;
+          if (bits & PTRBITS_REMOTE_BIT)
+            rv = dConnect->GetIIDForMethodParam(mIInfo, aInfo, paramInfo, type,
+                                                aMethodIndex, aParams, PR_FALSE,
+                                                iid);
+          if (NS_SUCCEEDED(rv))
+          {
+            nsISupports *obj = nsnull;
+            rv = dConnect->DeserializeInterfaceParamBits(bits, mPeerID, iid, obj);
+            if (NS_SUCCEEDED(rv))
+              *(void **)aParams[i].val.p = obj;
+          }
+        }
+        else if (type.IsArray())
+        {
+          void *array = nsnull;
+          rv = DeserializeArrayParam(dConnect, reader, mPeerID, mIInfo,
+                                     aMethodIndex, *aInfo, aParams, PR_FALSE,
+                                     paramInfo, PR_TRUE, array);
+          if (NS_SUCCEEDED(rv))
+            *(void **)aParams[i].val.p = array;
+        }
+      }
+    }
+  }
+
+  if (completion.Reply()->flags & DCON_OP_FLAGS_REPLY_EXCEPTION)
+  {
+    LOG(("got nsIException instance, will create a stub\n"));
+
+    nsIException *xcpt = nsnull;
+    rv = dConnect->DeserializeException (reader, mPeerID, &xcpt);
+    if (NS_SUCCEEDED(rv))
+    {
+      rv = em->SetCurrentException(xcpt);
+      NS_IF_RELEASE(xcpt);
+    }
+    NS_ASSERTION(NS_SUCCEEDED(rv), "failed to deserialize/set exception");
+  }
+
+  return NS_SUCCEEDED(rv) ? completion.GetResult() : rv;
+}
+
+//-----------------------------------------------------------------------------
+
+class DConnectSetupCompletion : public DConnectCompletion
+{
+public:
+  DConnectSetupCompletion(PRUint32 peer, const DConnectSetup *setup)
+    : DConnectCompletion(peer, DCON_OP_SETUP_REPLY, setup->request_index)
+    , mSetup(setup)
+    , mStatus(NS_OK)
+  {}
+
+  void OnResponseAvailable(PRUint32 sender, const DConnectOp *op, PRUint32 opLen)
+  {
+    if (op->opcode_major != DCON_OP_SETUP_REPLY)
+    {
+      NS_NOTREACHED("unexpected response");
+      mStatus = NS_ERROR_UNEXPECTED;
+      return;
+    }
+
+    if (opLen < sizeof(DConnectSetupReply))
+    {
+      NS_NOTREACHED("unexpected response size");
+      mStatus = NS_ERROR_UNEXPECTED;
+      return;
+    }
+
+    const DConnectSetupReply *reply = (const DConnectSetupReply *) op;
+
+    LOG(("got SETUP_REPLY: status=%x instance=0x%Lx\n", reply->status, reply->instance));
+
+    mStatus = reply->status;
+
+    if (NS_SUCCEEDED(reply->status))
+    {
+      // ensure ipcDConnectService is not deleted before we finish
+      nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+      nsresult rv;
+      if (dConnect)
+        rv = dConnect->CreateStub(mSetup->iid, sender, reply->instance,
+                                  getter_AddRefs(mStub));
+      else
+        rv = NS_ERROR_FAILURE;
+      if (NS_FAILED(rv))
+        mStatus = rv;
+    }
+
+    if (reply->flags & DCON_OP_FLAGS_REPLY_EXCEPTION)
+    {
+      const PRUint8 *params = ((const PRUint8 *) op) + sizeof (DConnectSetupReply);
+      const PRUint32 paramsLen = opLen - sizeof (DConnectSetupReply);
+
+      ipcMessageReader reader(params, paramsLen);
+
+      LOG(("got nsIException instance, will create a stub\n"));
+
+      nsresult rv;
+      nsCOMPtr <nsIExceptionService> es;
+      es = do_GetService (NS_EXCEPTIONSERVICE_CONTRACTID, &rv);
+      if (NS_SUCCEEDED(rv))
+      {
+        nsCOMPtr <nsIExceptionManager> em;
+        rv = es->GetCurrentExceptionManager (getter_AddRefs(em));
+        if (NS_SUCCEEDED(rv))
+        {
+          // ensure ipcDConnectService is not deleted before we finish
+          nsRefPtr <ipcDConnectService> dConnect (ipcDConnectService::GetInstance());
+          if (dConnect)
+          {
+            nsIException *xcpt = nsnull;
+            rv = dConnect->DeserializeException (reader, sender, &xcpt);
+            if (NS_SUCCEEDED(rv))
+            {
+              rv = em->SetCurrentException(xcpt);
+              NS_IF_RELEASE(xcpt);
+            }
+          }
+          else
+            rv = NS_ERROR_UNEXPECTED;
+        }
+      }
+      NS_ASSERTION(NS_SUCCEEDED(rv), "failed to deserialize/set exception");
+      if (NS_FAILED(rv))
+        mStatus = rv;
+    }
+  }
+
+  nsresult GetStub(void **aInstancePtr)
+  {
+    if (NS_FAILED(mStatus))
+      return mStatus;
+
+    DConnectStub *stub = mStub;
+    NS_IF_ADDREF(stub);
+    *aInstancePtr = stub;
+    return NS_OK;
+  }
+
+private:
+  const DConnectSetup    *mSetup;
+  nsresult                mStatus;
+  nsRefPtr<DConnectStub>  mStub;
+};
+
+// static
+nsresult
+SetupPeerInstance(PRUint32 aPeerID, DConnectSetup *aMsg, PRUint32 aMsgLen,
+                  void **aInstancePtr)
+{
+  *aInstancePtr = nsnull;
+
+  aMsg->opcode_major = DCON_OP_SETUP;
+  aMsg->flags = 0;
+  aMsg->request_index = NewRequestIndex();
+
+  // temporarily disable the DConnect target observer to block normal processing
+  // of pending messages through the event queue.
+  IPC_DISABLE_MESSAGE_OBSERVER_FOR_SCOPE(kDConnectTargetID);
+
+  // send SETUP message, expect SETUP_REPLY
+
+  nsresult rv = IPC_SendMessage(aPeerID, kDConnectTargetID,
+                                (const PRUint8 *) aMsg, aMsgLen);
+  if (NS_FAILED(rv))
+    return rv;
+
+  DConnectSetupCompletion completion(aPeerID, aMsg);
+
+  // need to allow messages from other clients to be processed immediately
+  // to avoid distributed dead locks.  the completion's OnMessageAvailable
+  // will call our default OnMessageAvailable if it receives any message
+  // other than the one for which it is waiting.
+
+  do
+  {
+    rv = IPC_WaitMessage(IPC_SENDER_ANY, kDConnectTargetID,
+                         &completion.GetSelector(), &completion,
+                         DCON_WAIT_TIMEOUT);
+    if (NS_FAILED(rv))
+      break;
+
+    rv = completion.GetStub(aInstancePtr);
+  }
+  while (NS_SUCCEEDED(rv) && *aInstancePtr == nsnull);
+
+  return rv;
+}
+
+//-----------------------------------------------------------------------------
+
+#if defined(DCONNECT_MULTITHREADED)  && !defined(DCONNECT_WITH_IPRT_REQ_POOL)
+
+class DConnectWorker : public nsIRunnable
+{
+public:
+  // no reference counting
+  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
+  NS_IMETHOD_(nsrefcnt) Release() { return 1; }
+  NS_IMETHOD QueryInterface(const nsIID &aIID, void **aInstancePtr);
+
+  NS_DECL_NSIRUNNABLE
+
+  DConnectWorker(ipcDConnectService *aDConnect) : mDConnect (aDConnect), mIsRunnable (PR_FALSE) {}
+  NS_HIDDEN_(nsresult) Init();
+  NS_HIDDEN_(void) Join() { mThread->Join(); };
+  NS_HIDDEN_(bool) IsRunning() { return mIsRunnable; };
+
+private:
+  nsCOMPtr <nsIThread> mThread;
+  ipcDConnectService *mDConnect;
+
+  // Indicate if thread might be quickly joined on shutdown.
+  volatile bool mIsRunnable;
+};
+
+NS_IMPL_QUERY_INTERFACE1(DConnectWorker, nsIRunnable)
+
+nsresult
+DConnectWorker::Init()
+{
+  return NS_NewThread(getter_AddRefs(mThread), this, 0, PR_JOINABLE_THREAD);
+}
+
+NS_IMETHODIMP
+DConnectWorker::Run()
+{
+  LOG(("DConnect Worker thread started.\n"));
+
+  mIsRunnable = PR_TRUE;
+
+  nsAutoMonitor mon(mDConnect->mPendingMon);
+
+  while (!mDConnect->mDisconnected)
+  {
+    DConnectRequest *request = mDConnect->mPendingQ.First();
+    if (!request)
+    {
+      mDConnect->mWaitingWorkers++;
+      {
+        // Note: we attempt to enter mWaitingWorkersMon from under mPendingMon
+        // here, but it should be safe because it's the only place where it
+        // happens. We could exit mPendingMon first, but we need to wait on it
+        // shorltly afterwards, which in turn will require us to enter it again
+        // just to exit immediately and start waiting. This seems to me a bit
+        // stupid (exit->enter->exit->wait).
+        nsAutoMonitor workersMon(mDConnect->mWaitingWorkersMon);
+        workersMon.NotifyAll();
+      }
+
+      nsresult rv = mon.Wait();
+      mDConnect->mWaitingWorkers--;
+
+      if (NS_FAILED(rv))
+        break;
+    }
+    else
+    {
+      LOG(("DConnect Worker thread got request.\n"));
+
+      // remove the request from the queue
+      mDConnect->mPendingQ.RemoveFirst();
+
+      PRBool pendingQEmpty = mDConnect->mPendingQ.IsEmpty();
+      mon.Exit();
+
+      if (pendingQEmpty)
+      {
+        nsAutoMonitor workersMon(mDConnect->mWaitingWorkersMon);
+        workersMon.NotifyAll();
+      }
+
+      // request is processed outside the queue monitor
+      mDConnect->OnIncomingRequest(request->peer, request->op, request->opLen);
+      delete request;
+
+      mon.Enter();
+    }
+  }
+
+  mIsRunnable = PR_FALSE;
+
+  LOG(("DConnect Worker thread stopped.\n"));
+  return NS_OK;
+}
+
+// called only on DConnect message thread
+nsresult
+ipcDConnectService::CreateWorker()
+{
+  DConnectWorker *worker = new DConnectWorker(this);
+  if (!worker)
+    return NS_ERROR_OUT_OF_MEMORY;
+  nsresult rv = worker->Init();
+  if (NS_SUCCEEDED(rv))
+  {
+    nsAutoLock lock(mLock);
+    /* tracking an illegal join in Shutdown. */
+    NS_ASSERTION(!mDisconnected, "CreateWorker racing Shutdown");
+    if (!mWorkers.AppendElement(worker))
+      rv = NS_ERROR_OUT_OF_MEMORY;
+  }
+  if (NS_FAILED(rv))
+    delete worker;
+  return rv;
+}
+
+#endif // defined(DCONNECT_MULTITHREADED) && !defined(DCONNECT_WITH_IPRT_REQ_POOL)
+
+//-----------------------------------------------------------------------------
+
+ipcDConnectService::ipcDConnectService()
+ : mLock(NULL)
+ , mStubLock(NULL)
+ , mDisconnected(PR_TRUE)
+ , mStubQILock(NULL)
+#if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+ , mhReqPool(NIL_RTREQPOOL)
+#endif
+{
+}
+
+PR_STATIC_CALLBACK(PLDHashOperator)
+EnumerateInstanceMapAndDelete (const DConnectInstanceKey::Key &aKey,
+                               DConnectInstance *aData,
+                               void *userArg)
+{
+  // this method is to be called on ipcDConnectService shutdown only
+  // (after which no DConnectInstances may exist), so forcibly delete them
+  // disregarding the reference counter
+
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    aData->InterfaceInfo()->GetNameShared(&name);
+    LOG(("ipcDConnectService: WARNING: deleting unreleased "
+         "instance=%p iface=%p {%s}\n", aData, aData->RealInstance(), name));
+  }
+#endif
+
+  delete aData;
+  return PL_DHASH_NEXT;
+}
+
+ipcDConnectService::~ipcDConnectService()
+{
+  if (!mDisconnected)
+    Shutdown();
+
+  mInstance = nsnull;
+  PR_DestroyLock(mStubQILock);
+  PR_DestroyLock(mStubLock);
+  PR_DestroyLock(mLock);
+#if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+  RTReqPoolRelease(mhReqPool);
+  mhReqPool = NIL_RTREQPOOL;
+#endif
+}
+
+//-----------------------------------------------------------------------------
+
+nsresult
+ipcDConnectService::Init()
+{
+  nsresult rv;
+
+  LOG(("ipcDConnectService::Init.\n"));
+
+  rv = IPC_DefineTarget(kDConnectTargetID, this);
+  if (NS_FAILED(rv))
+    return rv;
+
+  rv = IPC_AddClientObserver(this);
+  if (NS_FAILED(rv))
+    return rv;
+
+  mLock = PR_NewLock();
+  if (!mLock)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  if (!mInstances.Init())
+    return NS_ERROR_OUT_OF_MEMORY;
+  if (!mInstanceSet.Init())
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  mStubLock = PR_NewLock();
+  if (!mStubLock)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  if (!mStubs.Init())
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  mIIM = do_GetService(NS_INTERFACEINFOMANAGER_SERVICE_CONTRACTID, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+
+  mStubQILock = PR_NewLock();
+  if (!mStubQILock)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+#if defined(DCONNECT_MULTITHREADED)
+# if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+  int vrc = RTReqPoolCreate(1024 /*cMaxThreads*/, 10*RT_MS_1SEC /*cMsMinIdle*/,
+                            8 /*cThreadsPushBackThreshold */, RT_MS_1SEC /* cMsMaxPushBack */,
+                            "DCon", &mhReqPool);
+  if (RT_FAILURE(vrc))
+  {
+    mhReqPool = NIL_RTREQPOOL;
+    return NS_ERROR_FAILURE;
+  }
+
+  mDisconnected = PR_FALSE;
+
+# else
+
+  mPendingMon = nsAutoMonitor::NewMonitor("DConnect pendingQ monitor");
+  if (!mPendingMon)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  mWaitingWorkers = 0;
+
+  mWaitingWorkersMon = nsAutoMonitor::NewMonitor("DConnect waiting workers monitor");
+  if (!mWaitingWorkersMon)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  /* The DConnectWorker::Run method checks the ipcDConnectService::mDisconnected.
+   * So mDisconnect must be set here to avoid an immediate exit of the worker thread.
+   */
+  mDisconnected = PR_FALSE;
+
+  // create a single worker thread
+  rv = CreateWorker();
+  if (NS_FAILED(rv))
+  {
+    mDisconnected = PR_TRUE;
+    return rv;
+  }
+
+# endif
+#else
+
+  mDisconnected = PR_FALSE;
+
+#endif
+
+  mInstance = this;
+
+  LOG(("ipcDConnectService::Init NS_OK.\n"));
+  return NS_OK;
+}
+
+void
+ipcDConnectService::Shutdown()
+{
+  {
+    // set the disconnected flag to make sensitive public methods
+    // unavailale from other (non worker) threads.
+    nsAutoLock lock(mLock);
+    mDisconnected = PR_TRUE;
+  }
+
+#if defined(DCONNECT_MULTITHREADED)
+# if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+
+#  if defined(DCONNECT_STATS)
+  fprintf(stderr, "ipcDConnectService Stats\n");
+  fprintf(stderr,
+          " => number of worker threads:  %llu (created %llu)\n"
+          " => requests processed:        %llu\n"
+          " => avg requests process time: %llu ns\n"
+          " => avg requests waiting time: %llu ns\n",
+          RTReqPoolGetStat(mhReqPool, RTREQPOOLSTAT_THREADS),
+          RTReqPoolGetStat(mhReqPool, RTREQPOOLSTAT_THREADS_CREATED),
+          RTReqPoolGetStat(mhReqPool, RTREQPOOLSTAT_REQUESTS_PROCESSED),
+          RTReqPoolGetStat(mhReqPool, RTREQPOOLSTAT_NS_AVERAGE_REQ_PROCESSING),
+          RTReqPoolGetStat(mhReqPool, RTREQPOOLSTAT_NS_AVERAGE_REQ_QUEUED)
+          );
+#  endif
+
+  RTReqPoolRelease(mhReqPool);
+  mhReqPool = NIL_RTREQPOOL;
+
+# else
+
+  {
+    // remove all pending messages and wake up all workers.
+    // mDisconnected is true here and they will terminate execution after
+    // processing the last request.
+    nsAutoMonitor mon(mPendingMon);
+    mPendingQ.DeleteAll();
+    mon.NotifyAll();
+  }
+
+#if defined(DCONNECT_STATS)
+  fprintf(stderr, "ipcDConnectService Stats\n");
+  fprintf(stderr, " => number of worker threads: %d\n", mWorkers.Count());
+  LOG(("ipcDConnectService Stats\n"));
+  LOG((" => number of worker threads: %d\n", mWorkers.Count()));
+#endif
+
+
+  // Iterate over currently running worker threads
+  // during VBOX_XPCOM_SHUTDOWN_TIMEOUT_MS, join() those who
+  // exited a working loop and abandon ones which have not
+  // managed to do that when timeout occurred.
+  LOG(("Worker threads: %d\n", mWorkers.Count()));
+  uint64_t tsStart = RTTimeMilliTS();
+  while ((tsStart + VBOX_XPCOM_SHUTDOWN_TIMEOUT_MS ) > RTTimeMilliTS() && mWorkers.Count() > 0)
+  {
+    // Some array elements might be deleted while iterating. Going from the last
+    // to the first array element (intentionally) in order to do not conflict with
+    // array indexing once element is deleted.
+    for (int i = mWorkers.Count() - 1; i >= 0; i--)
+    {
+      DConnectWorker *worker = NS_STATIC_CAST(DConnectWorker *, mWorkers[i]);
+      if (worker->IsRunning() == PR_FALSE)
+      {
+        LOG(("Worker %p joined.\n", worker));
+        worker->Join();
+        delete worker;
+        mWorkers.RemoveElementAt(i);
+      }
+    }
+
+    /* Double-ckeck if we already allowed to quit. */
+    if ((tsStart + VBOX_XPCOM_SHUTDOWN_TIMEOUT_MS ) < RTTimeMilliTS() || mWorkers.Count() == 0)
+        break;
+
+    // Relax a bit before the next round.
+    RTThreadSleep(10);
+  }
+
+  LOG(("There are %d thread(s) left.\n", mWorkers.Count()));
+
+  // If there are some running threads left, terminate the process.
+  if (mWorkers.Count() > 0)
+    exit(1);
+
+
+  nsAutoMonitor::DestroyMonitor(mWaitingWorkersMon);
+  nsAutoMonitor::DestroyMonitor(mPendingMon);
+
+# endif
+#endif
+
+  // make sure we have released all instances
+  mInstances.EnumerateRead(EnumerateInstanceMapAndDelete, nsnull);
+
+  mInstanceSet.Clear();
+  mInstances.Clear();
+
+  // clear the stub table
+  // (this will not release stubs -- it's the client's responsibility)
+  mStubs.Clear();
+}
+
+// this should be inlined
+nsresult
+ipcDConnectService::GetInterfaceInfo(const nsID &iid, nsIInterfaceInfo **result)
+{
+  return mIIM->GetInfoForIID(&iid, result);
+}
+
+// this is adapted from the version in xpcwrappednative.cpp
+nsresult
+ipcDConnectService::GetIIDForMethodParam(nsIInterfaceInfo *iinfo,
+                                         const nsXPTMethodInfo *methodInfo,
+                                         const nsXPTParamInfo &paramInfo,
+                                         const nsXPTType &type,
+                                         PRUint16 methodIndex,
+                                         nsXPTCMiniVariant *dispatchParams,
+                                         PRBool isXPTCVariantArray,
+                                         nsID &result)
+{
+  PRUint8 argnum, tag = type.TagPart();
+  nsresult rv;
+
+  if (tag == nsXPTType::T_INTERFACE)
+  {
+    rv = iinfo->GetIIDForParamNoAlloc(methodIndex, &paramInfo, &result);
+  }
+  else if (tag == nsXPTType::T_INTERFACE_IS)
+  {
+    rv = iinfo->GetInterfaceIsArgNumberForParam(methodIndex, &paramInfo, &argnum);
+    if (NS_FAILED(rv))
+      return rv;
+
+    const nsXPTParamInfo& arg_param = methodInfo->GetParam(argnum);
+    const nsXPTType& arg_type = arg_param.GetType();
+
+    // The xpidl compiler ensures this. We reaffirm it for safety.
+    if (!arg_type.IsPointer() || arg_type.TagPart() != nsXPTType::T_IID)
+      return NS_ERROR_UNEXPECTED;
+
+    nsID *p = (nsID *) GET_PARAM(dispatchParams, isXPTCVariantArray, argnum).val.p;
+    if (!p)
+      return NS_ERROR_UNEXPECTED;
+
+    result = *p;
+  }
+  else
+    rv = NS_ERROR_UNEXPECTED;
+  return rv;
+}
+
+nsresult
+ipcDConnectService::StoreInstance(DConnectInstance *wrapper)
+{
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    wrapper->InterfaceInfo()->GetNameShared(&name);
+    LOG(("ipcDConnectService::StoreInstance(): instance=%p iface=%p {%s}\n",
+         wrapper, wrapper->RealInstance(), name));
+  }
+#endif
+
+  nsresult rv = mInstanceSet.Put(wrapper);
+  if (NS_SUCCEEDED(rv))
+  {
+    rv = mInstances.Put(wrapper->GetKey(), wrapper)
+      ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+    if (NS_FAILED(rv))
+      mInstanceSet.Remove(wrapper);
+  }
+  return rv;
+}
+
+void
+ipcDConnectService::DeleteInstance(DConnectInstance *wrapper,
+                                   PRBool locked /* = PR_FALSE */)
+{
+  if (!locked)
+    PR_Lock(mLock);
+
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    wrapper->InterfaceInfo()->GetNameShared(&name);
+    LOG(("ipcDConnectService::DeleteInstance(): instance=%p iface=%p {%s}\n",
+         wrapper, wrapper->RealInstance(), name));
+  }
+#endif
+
+  mInstances.Remove(wrapper->GetKey());
+  mInstanceSet.Remove(wrapper);
+
+  if (!locked)
+    PR_Unlock(mLock);
+}
+
+PRBool
+ipcDConnectService::FindInstanceAndAddRef(PRUint32 peer,
+                                          const nsISupports *obj,
+                                          const nsIID *iid,
+                                          DConnectInstance **wrapper)
+{
+  PRBool result = mInstances.Get(DConnectInstanceKey::Key(peer, obj, iid), wrapper);
+  if (result)
+    (*wrapper)->AddRef();
+  return result;
+}
+
+PRBool
+ipcDConnectService::CheckInstanceAndAddRef(DConnectInstance *wrapper, PRUint32 peer)
+{
+  nsAutoLock lock (mLock);
+
+  if (mInstanceSet.Contains(wrapper) && wrapper->Peer() == peer)
+  {
+    wrapper->AddRef();
+    return PR_TRUE;
+  }
+  return PR_FALSE;
+}
+
+nsresult
+ipcDConnectService::StoreStub(DConnectStub *stub)
+{
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    nsCOMPtr<nsIInterfaceInfo> iinfo;
+    stub->GetInterfaceInfo(getter_AddRefs(iinfo));
+    iinfo->GetNameShared(&name);
+    LOG(("ipcDConnectService::StoreStub(): stub=%p instance=0x%Lx {%s}\n",
+         stub, stub->Instance(), name));
+  }
+#endif
+
+  return mStubs.Put(stub->GetKey(), stub)
+      ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+}
+
+void
+ipcDConnectService::DeleteStub(DConnectStub *stub)
+{
+#ifdef IPC_LOGGING
+  if (IPC_LOG_ENABLED())
+  {
+    const char *name;
+    nsCOMPtr<nsIInterfaceInfo> iinfo;
+    stub->GetInterfaceInfo(getter_AddRefs(iinfo));
+    iinfo->GetNameShared(&name);
+    LOG(("ipcDConnectService::DeleteStub(): stub=%p instance=0x%Lx {%s}\n",
+         stub, stub->Instance(), name));
+  }
+#endif
+
+  // this method is intended to be called only from DConnectStub::Release().
+  // the stub object is not deleted when removed from the table, because
+  // DConnectStub pointers are not owned by mStubs.
+  mStubs.Remove(stub->GetKey());
+}
+
+// not currently used
+#if 0
+PRBool
+ipcDConnectService::FindStubAndAddRef(PRUint32 peer, const DConAddr instance,
+                                      DConnectStub **stub)
+{
+  nsAutoLock stubLock (mStubLock);
+
+  PRBool result = mStubs.Get(DConnectStubKey::Key(peer, instance), stub);
+  if (result)
+    NS_ADDREF(*stub);
+  return result;
+}
+#endif
+
+NS_IMPL_THREADSAFE_ISUPPORTS3(ipcDConnectService, ipcIDConnectService,
+                                                  ipcIMessageObserver,
+                                                  ipcIClientObserver)
+
+NS_IMETHODIMP
+ipcDConnectService::CreateInstance(PRUint32 aPeerID,
+                                   const nsID &aCID,
+                                   const nsID &aIID,
+                                   void **aInstancePtr)
+{
+  DConnectSetupClassID msg;
+  msg.opcode_minor = DCON_OP_SETUP_NEW_INST_CLASSID;
+  msg.iid = aIID;
+  msg.classid = aCID;
+
+  return SetupPeerInstance(aPeerID, &msg, sizeof(msg), aInstancePtr);
+}
+
+NS_IMETHODIMP
+ipcDConnectService::CreateInstanceByContractID(PRUint32 aPeerID,
+                                               const char *aContractID,
+                                               const nsID &aIID,
+                                               void **aInstancePtr)
+{
+  size_t slen = strlen(aContractID);
+  size_t size = sizeof(DConnectSetupContractID) + slen;
+
+  DConnectSetupContractID *msg =
+      (DConnectSetupContractID *) malloc(size);
+
+  msg->opcode_minor = DCON_OP_SETUP_NEW_INST_CONTRACTID;
+  msg->iid = aIID;
+  memcpy(&msg->contractid, aContractID, slen + 1);
+
+  nsresult rv = SetupPeerInstance(aPeerID, msg, size, aInstancePtr);
+
+  free(msg);
+  return rv;
+}
+
+NS_IMETHODIMP
+ipcDConnectService::GetService(PRUint32 aPeerID,
+                               const nsID &aCID,
+                               const nsID &aIID,
+                               void **aInstancePtr)
+{
+  DConnectSetupClassID msg;
+  msg.opcode_minor = DCON_OP_SETUP_GET_SERV_CLASSID;
+  msg.iid = aIID;
+  msg.classid = aCID;
+
+  return SetupPeerInstance(aPeerID, &msg, sizeof(msg), aInstancePtr);
+}
+
+NS_IMETHODIMP
+ipcDConnectService::GetServiceByContractID(PRUint32 aPeerID,
+                                           const char *aContractID,
+                                           const nsID &aIID,
+                                           void **aInstancePtr)
+{
+  size_t slen = strlen(aContractID);
+  size_t size = sizeof(DConnectSetupContractID) + slen;
+
+  DConnectSetupContractID *msg =
+      (DConnectSetupContractID *) malloc(size);
+
+  msg->opcode_minor = DCON_OP_SETUP_GET_SERV_CONTRACTID;
+  msg->iid = aIID;
+  memcpy(&msg->contractid, aContractID, slen + 1);
+
+  nsresult rv = SetupPeerInstance(aPeerID, msg, size, aInstancePtr);
+
+  free(msg);
+  return rv;
+}
+
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+ipcDConnectService::OnMessageAvailable(PRUint32 aSenderID,
+                                       const nsID &aTarget,
+                                       const PRUint8 *aData,
+                                       PRUint32 aDataLen)
+{
+  if (mDisconnected)
+    return NS_ERROR_NOT_INITIALIZED;
+
+  const DConnectOp *op = (const DConnectOp *) aData;
+
+  LOG (("ipcDConnectService::OnMessageAvailable: "
+        "senderID=%d, opcode_major=%d, index=%d\n",
+        aSenderID, op->opcode_major, op->request_index));
+
+#if defined(DCONNECT_MULTITHREADED)
+# if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+
+  void *pvDataDup = RTMemDup(aData, aDataLen);
+  if (RT_UNLIKELY(!pvDataDup))
+    return NS_ERROR_OUT_OF_MEMORY;
+  int rc = RTReqPoolCallVoidNoWait(mhReqPool, (PFNRT)ProcessMessageOnWorkerThread, 4,
+                                   this, aSenderID, pvDataDup, aDataLen);
+  if (RT_FAILURE(rc))
+    return NS_ERROR_FAILURE;
+
+# else
+
+  nsAutoMonitor mon(mPendingMon);
+  mPendingQ.Append(new DConnectRequest(aSenderID, op, aDataLen));
+  // notify a worker
+  mon.Notify();
+  mon.Exit();
+
+  // Yield the cpu so a worker can get a chance to start working without too much fuss.
+  PR_Sleep(PR_INTERVAL_NO_WAIT);
+  mon.Enter();
+  // examine the queue
+  if (mPendingQ.Count() > mWaitingWorkers)
+  {
+    // wait a little while to let the workers empty the queue.
+    mon.Exit();
+    {
+      PRUint32 ticks = PR_MillisecondsToInterval(PR_MIN(mWorkers.Count() / 20 + 1, 10));
+      nsAutoMonitor workersMon(mWaitingWorkersMon);
+      workersMon.Wait(ticks);
+    }
+    mon.Enter();
+    // examine the queue again
+    if (mPendingQ.Count() > mWaitingWorkers)
+    {
+      // we need one more worker
+      nsresult rv = CreateWorker();
+      NS_ASSERTION(NS_SUCCEEDED(rv), "failed to create one more worker thread");
+      rv = rv;
+    }
+  }
+
+# endif
+#else
+
+  OnIncomingRequest(aSenderID, op, aDataLen);
+
+#endif
+
+  return NS_OK;
+}
+
+struct PruneInstanceMapForPeerArgs
+{
+  ipcDConnectService *that;
+  PRUint32 clientID;
+  nsVoidArray &wrappers;
+};
+
+PR_STATIC_CALLBACK(PLDHashOperator)
+PruneInstanceMapForPeer (const DConnectInstanceKey::Key &aKey,
+                         DConnectInstance *aData,
+                         void *userArg)
+{
+  PruneInstanceMapForPeerArgs *args = (PruneInstanceMapForPeerArgs *)userArg;
+  NS_ASSERTION(args, "PruneInstanceMapForPeerArgs is NULL");
+
+  if (args && args->clientID == aData->Peer())
+  {
+    nsrefcnt countIPC = aData->ReleaseIPC(PR_TRUE /* locked */);
+
+    LOG(("ipcDConnectService::PruneInstanceMapForPeer: "
+         "instance=%p: %d IPC refs to release\n",
+         aData, countIPC + 1));
+
+    // release all IPC instances of the "officially dead" client (see
+    // #OnRelease() to understand why it must be done under the lock). Note
+    // that due to true multithreading, late OnRelease() requests may still
+    // happen on other worker threads *after* OnClientStateChange() has been
+    // called, but it's OK because the instance will be removed from the map
+    // by the below code alreay and won't be deleted for the second time.
+    while (countIPC)
+    {
+      countIPC = aData->ReleaseIPC(PR_TRUE /* locked */);
+      aData->Release();
+    }
+
+    // collect the instance for the last release
+    // (we'll do it later outside the lock)
+    if (!args->wrappers.AppendElement(aData))
+    {
+      NS_NOTREACHED("Not enough memory");
+      // bad but what to do
+      aData->Release();
+    }
+  }
+  return PL_DHASH_NEXT;
+}
+
+NS_IMETHODIMP
+ipcDConnectService::OnClientStateChange(PRUint32 aClientID,
+                                        PRUint32 aClientState)
+{
+  LOG(("ipcDConnectService::OnClientStateChange: aClientID=%d, aClientState=%d\n",
+       aClientID, aClientState));
+
+  if (aClientState == ipcIClientObserver::CLIENT_DOWN)
+  {
+    if (aClientID == IPC_SENDER_ANY)
+    {
+      // a special case: our IPC system is being shutdown, try to safely
+      // uninitialize everything...
+      Shutdown();
+    }
+    else
+    {
+      LOG(("ipcDConnectService::OnClientStateChange: "
+           "pruning all instances created for peer %d...\n", aClientID));
+
+      nsVoidArray wrappers;
+
+      {
+        nsAutoLock lock (mLock);
+
+        // make sure we have removed all instances from instance maps
+        PruneInstanceMapForPeerArgs args = { this, aClientID, wrappers };
+        mInstances.EnumerateRead(PruneInstanceMapForPeer, (void *)&args);
+      }
+
+      LOG(("ipcDConnectService::OnClientStateChange: "
+           "%d lost instances\n", wrappers.Count()));
+
+      // release all pending references left after PruneInstanceMapForPeer().
+      // this may call wrapper destructors so it's important to do that
+      // outside the lock because destructors will release the real objects
+      // which may need to make asynchronous use our service
+      for (PRInt32 i = 0; i < wrappers.Count(); ++i)
+        ((DConnectInstance *) wrappers[i])->Release();
+    }
+  }
+
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+
+#if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+/**
+ * Function called by the request thread pool to process a incoming request in
+ * the context of a worker thread.
+ */
+/* static */ DECLCALLBACK(void)
+ipcDConnectService::ProcessMessageOnWorkerThread(ipcDConnectService *aThis, PRUint32 aSenderID, void *aData, PRUint32 aDataLen)
+{
+  if (!aThis->mDisconnected)
+    aThis->OnIncomingRequest(aSenderID, (const DConnectOp *)aData, aDataLen);
+  RTMemFree(aData);
+}
+#endif
+
+void
+ipcDConnectService::OnIncomingRequest(PRUint32 peer, const DConnectOp *op, PRUint32 opLen)
+{
+  switch (op->opcode_major)
+  {
+    case DCON_OP_SETUP:
+      OnSetup(peer, (const DConnectSetup *) op, opLen);
+      break;
+    case DCON_OP_RELEASE:
+      OnRelease(peer, (const DConnectRelease *) op);
+      break;
+    case DCON_OP_INVOKE:
+      OnInvoke(peer, (const DConnectInvoke *) op, opLen);
+      break;
+    default:
+      NS_NOTREACHED("unknown opcode major");
+  }
+}
+
+void
+ipcDConnectService::OnSetup(PRUint32 peer, const DConnectSetup *setup, PRUint32 opLen)
+{
+  nsISupports *instance = nsnull;
+  nsresult rv = NS_ERROR_FAILURE;
+
+  switch (setup->opcode_minor)
+  {
+    // CreateInstance
+    case DCON_OP_SETUP_NEW_INST_CLASSID:
+    {
+      const DConnectSetupClassID *setupCI = (const DConnectSetupClassID *) setup;
+
+      nsCOMPtr<nsIComponentManager> compMgr;
+      rv = NS_GetComponentManager(getter_AddRefs(compMgr));
+      if (NS_SUCCEEDED(rv))
+        rv = compMgr->CreateInstance(setupCI->classid, nsnull, setupCI->iid, (void **) &instance);
+
+      break;
+    }
+
+    // CreateInstanceByContractID
+    case DCON_OP_SETUP_NEW_INST_CONTRACTID:
+    {
+      const DConnectSetupContractID *setupCI = (const DConnectSetupContractID *) setup;
+
+      nsCOMPtr<nsIComponentManager> compMgr;
+      rv = NS_GetComponentManager(getter_AddRefs(compMgr));
+      if (NS_SUCCEEDED(rv))
+        rv = compMgr->CreateInstanceByContractID(setupCI->contractid, nsnull, setupCI->iid, (void **) &instance);
+
+      break;
+    }
+
+    // GetService
+    case DCON_OP_SETUP_GET_SERV_CLASSID:
+    {
+      const DConnectSetupClassID *setupCI = (const DConnectSetupClassID *) setup;
+
+      nsCOMPtr<nsIServiceManager> svcMgr;
+      rv = NS_GetServiceManager(getter_AddRefs(svcMgr));
+      if (NS_SUCCEEDED(rv))
+        rv = svcMgr->GetService(setupCI->classid, setupCI->iid, (void **) &instance);
+      break;
+    }
+
+    // GetServiceByContractID
+    case DCON_OP_SETUP_GET_SERV_CONTRACTID:
+    {
+      const DConnectSetupContractID *setupCI = (const DConnectSetupContractID *) setup;
+
+      nsCOMPtr<nsIServiceManager> svcMgr;
+      rv = NS_GetServiceManager(getter_AddRefs(svcMgr));
+      if (NS_SUCCEEDED(rv))
+        rv = svcMgr->GetServiceByContractID(setupCI->contractid, setupCI->iid, (void **) &instance);
+
+      break;
+    }
+
+    // QueryInterface
+    case DCON_OP_SETUP_QUERY_INTERFACE:
+    {
+      const DConnectSetupQueryInterface *setupQI = (const DConnectSetupQueryInterface *) setup;
+      DConnectInstance *QIinstance = (DConnectInstance *)setupQI->instance;
+
+      // make sure we've been sent a valid wrapper
+      if (!CheckInstanceAndAddRef(QIinstance, peer))
+      {
+        NS_NOTREACHED("instance wrapper not found");
+        rv = NS_ERROR_INVALID_ARG;
+      }
+      else
+      {
+        rv = QIinstance->RealInstance()->QueryInterface(setupQI->iid, (void **) &instance);
+        QIinstance->Release();
+      }
+      break;
+    }
+
+    default:
+      NS_NOTREACHED("unexpected minor opcode");
+      rv = NS_ERROR_UNEXPECTED;
+      break;
+  }
+
+  nsVoidArray wrappers;
+
+  // now, create instance wrapper, and store it in our instances set.
+  // this allows us to keep track of object references held on behalf of a
+  // particular peer.  we can use this information to cleanup after a peer
+  // that disconnects without sending RELEASE messages for its objects.
+  DConnectInstance *wrapper = nsnull;
+  if (NS_SUCCEEDED(rv))
+  {
+    nsCOMPtr<nsIInterfaceInfo> iinfo;
+    rv = GetInterfaceInfo(setup->iid, getter_AddRefs(iinfo));
+    if (NS_SUCCEEDED(rv))
+    {
+      nsAutoLock lock (mLock);
+
+      // first try to find an existing wrapper for the given object
+      if (!FindInstanceAndAddRef(peer, instance, &setup->iid, &wrapper))
+      {
+        wrapper = new DConnectInstance(peer, iinfo, instance);
+        if (!wrapper)
+          rv = NS_ERROR_OUT_OF_MEMORY;
+        else
+        {
+          rv = StoreInstance(wrapper);
+          if (NS_FAILED(rv))
+          {
+            delete wrapper;
+            wrapper = nsnull;
+          }
+          else
+          {
+            // reference the newly created wrapper
+            wrapper->AddRef();
+          }
+        }
+      }
+
+      if (wrapper)
+      {
+        // increase the second, IPC-only, reference counter (mandatory before
+        // trying wrappers.AppendElement() to make sure ReleaseIPC() will remove
+        // the wrapper from the instance map on failure)
+        wrapper->AddRefIPC();
+
+        if (!wrappers.AppendElement(wrapper))
+        {
+          wrapper->ReleaseIPC();
+          wrapper->Release();
+          rv = NS_ERROR_OUT_OF_MEMORY;
+        }
+      }
+
+      // wrapper remains referenced when passing it to the client
+      // (will be released upon DCON_OP_RELEASE)
+    }
+  }
+
+  NS_IF_RELEASE(instance);
+
+  nsCOMPtr <nsIException> exception;
+  PRBool got_exception = PR_FALSE;
+
+  if (rv != NS_OK)
+  {
+    // try to fetch an nsIException possibly set by one of the setup methods
+    nsresult rv2;
+    nsCOMPtr <nsIExceptionService> es;
+    es = do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID, &rv2);
+    if (NS_SUCCEEDED(rv2))
+    {
+      nsCOMPtr <nsIExceptionManager> em;
+      rv2 = es->GetCurrentExceptionManager (getter_AddRefs (em));
+      if (NS_SUCCEEDED(rv2))
+      {
+        rv2 = em->GetCurrentException (getter_AddRefs (exception));
+        if (NS_SUCCEEDED(rv2))
+        {
+          LOG(("got nsIException instance, will serialize\n"));
+          got_exception = PR_TRUE;
+        }
+      }
+    }
+    NS_ASSERTION(NS_SUCCEEDED(rv2), "failed to get/serialize exception");
+    if (NS_FAILED(rv2))
+      rv = rv2;
+  }
+
+  ipcMessageWriter writer(64);
+
+  DConnectSetupReply msg;
+  msg.opcode_major = DCON_OP_SETUP_REPLY;
+  msg.opcode_minor = 0;
+  msg.flags = 0;
+  msg.request_index = setup->request_index;
+  msg.instance = (DConAddr)(uintptr_t)wrapper;
+  msg.status = rv;
+
+  if (got_exception)
+    msg.flags |= DCON_OP_FLAGS_REPLY_EXCEPTION;
+
+  writer.PutBytes(&msg, sizeof(msg));
+
+  if (got_exception)
+  {
+    rv = SerializeException(writer, peer, exception, wrappers);
+    NS_ASSERTION(NS_SUCCEEDED(rv), "failed to get/serialize exception");
+  }
+
+  // fire off SETUP_REPLY, don't wait for a response
+  if (NS_FAILED(rv))
+    rv = IPC_SendMessage(peer, kDConnectTargetID,
+                         (const PRUint8 *) &msg, sizeof(msg));
+  else
+    rv = IPC_SendMessage(peer, kDConnectTargetID,
+                         writer.GetBuffer(), writer.GetSize());
+
+  if (NS_FAILED(rv))
+  {
+    LOG(("unable to send SETUP_REPLY: rv=%x\n", rv));
+    ReleaseWrappers(wrappers, peer);
+  }
+}
+
+void
+ipcDConnectService::OnRelease(PRUint32 peer, const DConnectRelease *release)
+{
+  LOG(("ipcDConnectService::OnRelease [peer=%u instance=0x%Lx]\n",
+       peer, release->instance));
+
+  DConnectInstance *wrapper = (DConnectInstance *)release->instance;
+
+  nsAutoLock lock (mLock);
+
+  // make sure we've been sent a valid wrapper from the same peer we created
+  // this wrapper for
+  if (mInstanceSet.Contains(wrapper) && wrapper->Peer() == peer)
+  {
+    // release the IPC reference from under the lock to ensure atomicity of
+    // the "check + possible delete" sequence ("delete" is remove this wrapper
+    // from the instance map when the IPC reference counter drops to zero)
+    wrapper->ReleaseIPC(PR_TRUE /* locked */);
+    // leave the lock before Release() because it may call the destructor
+    // which will release the real object which may need to make asynchronous
+    // use our service
+    lock.unlock();
+    wrapper->Release();
+  }
+  else
+  {
+    // it is possible that the client disconnection event handler has released
+    // all client instances before the DCON_OP_RELEASE message sent by the
+    // client gets processed here (because of true multithreading). Just log
+    // a debug warning
+    LOG(("ipcDConnectService::OnRelease: WARNING: "
+         "instance wrapper %p for peer %d not found", wrapper, peer));
+  }
+}
+
+void
+ipcDConnectService::OnInvoke(PRUint32 peer, const DConnectInvoke *invoke, PRUint32 opLen)
+{
+  LOG(("ipcDConnectService::OnInvoke [peer=%u instance=0x%Lx method=%u]\n",
+      peer, invoke->instance, invoke->method_index));
+
+  DConnectInstance *wrapper = (DConnectInstance *)invoke->instance;
+
+  ipcMessageReader reader((const PRUint8 *) (invoke + 1), opLen - sizeof(*invoke));
+
+  const nsXPTMethodInfo *methodInfo;
+  nsXPTCVariant *params = nsnull;
+  nsCOMPtr<nsIInterfaceInfo> iinfo = nsnull;
+  PRUint8 i, paramCount = 0, paramUsed = 0;
+  nsresult rv;
+
+  nsCOMPtr <nsIException> exception;
+  PRBool got_exception = PR_FALSE;
+
+  // make sure we've been sent a valid wrapper
+  if (!CheckInstanceAndAddRef(wrapper, peer))
+  {
+    NS_NOTREACHED("instance wrapper not found");
+    wrapper = nsnull;
+    rv = NS_ERROR_INVALID_ARG;
+    goto end;
+  }
+
+  iinfo = wrapper->InterfaceInfo();
+
+  rv = iinfo->GetMethodInfo(invoke->method_index, &methodInfo);
+  if (NS_FAILED(rv))
+    goto end;
+
+  paramCount = methodInfo->GetParamCount();
+
+  LOG(("  iface=%p\n", wrapper->RealInstance()));
+  LOG(("  name=%s\n", methodInfo->GetName()));
+  LOG(("  param-count=%u\n", (PRUint32) paramCount));
+  LOG(("  request-index=%d\n", (PRUint32) invoke->request_index));
+
+  params = new nsXPTCVariant[paramCount];
+  if (!params)
+  {
+    rv = NS_ERROR_OUT_OF_MEMORY;
+    goto end;
+  }
+
+  // setup |params| for xptcall
+
+  for (i=0; i<paramCount; ++i, ++paramUsed)
+  {
+    const nsXPTParamInfo &paramInfo = methodInfo->GetParam(i);
+
+    // XXX are inout params an issue?
+    // yes, we will need to do v.ptr = &v.val for them (DeserializeParam doesn't
+    // currently do that) to let the callee correctly pick it up and change.
+
+    if (paramInfo.IsIn() && !paramInfo.IsDipper())
+      rv = DeserializeParam(reader, paramInfo.GetType(), params[i]);
+    else
+      rv = SetupParam(paramInfo, params[i]);
+
+    if (NS_FAILED(rv))
+      goto end;
+  }
+
+  // fixup any interface pointers.  we do this with a second pass so that
+  // we can properly handle INTERFACE_IS. This pass is also used to deserialize
+  // arrays (array data goes after all other params).
+  for (i=0; i<paramCount; ++i)
+  {
+    const nsXPTParamInfo &paramInfo = methodInfo->GetParam(i);
+    if (paramInfo.IsIn())
+    {
+      const nsXPTType &type = paramInfo.GetType();
+      if (type.IsInterfacePointer())
+      {
+        // grab the DConAddr value temporarily stored in the param
+#ifdef VBOX
+        PtrBits bits = params[i].val.u64;
+#else
+        PtrBits bits = (PtrBits)(uintptr_t) params[i].val.p;
+#endif
+
+        // DeserializeInterfaceParamBits needs IID only if it's a remote object
+        nsID iid;
+        if (bits & PTRBITS_REMOTE_BIT)
+        {
+          rv = GetIIDForMethodParam(iinfo, methodInfo, paramInfo, type,
+                                    invoke->method_index, params, PR_TRUE, iid);
+          if (NS_FAILED(rv))
+            goto end;
+        }
+
+        nsISupports *obj = nsnull;
+        rv = DeserializeInterfaceParamBits(bits, peer, iid, obj);
+        if (NS_FAILED(rv))
+          goto end;
+
+        params[i].val.p = obj;
+        // mark as interface to let FinishParam() release this param
+        params[i].SetValIsInterface();
+      }
+      else if (type.IsArray())
+      {
+        void *array = nsnull;
+        rv = DeserializeArrayParam(this, reader, peer, iinfo,
+                                   invoke->method_index, *methodInfo, params,
+                                   PR_TRUE, paramInfo, PR_FALSE, array);
+        if (NS_FAILED(rv))
+          goto end;
+
+        params[i].val.p = array;
+        // mark to let FinishParam() free this param
+        params[i].SetValIsAllocated();
+      }
+    }
+  }
+
+  rv = XPTC_InvokeByIndex(wrapper->RealInstance(),
+                          invoke->method_index,
+                          paramCount,
+                          params);
+
+  if (rv != NS_OK)
+  {
+    // try to fetch an nsIException possibly set by the method
+    nsresult rv2;
+    nsCOMPtr <nsIExceptionService> es;
+    es = do_GetService(NS_EXCEPTIONSERVICE_CONTRACTID, &rv2);
+    if (NS_SUCCEEDED(rv2))
+    {
+      nsCOMPtr <nsIExceptionManager> em;
+      rv2 = es->GetCurrentExceptionManager (getter_AddRefs (em));
+      if (NS_SUCCEEDED(rv2))
+      {
+        rv2 = em->GetCurrentException (getter_AddRefs (exception));
+        if (NS_SUCCEEDED(rv2))
+        {
+          LOG(("got nsIException instance, will serialize\n"));
+          got_exception = PR_TRUE;
+        }
+      }
+    }
+    NS_ASSERTION(NS_SUCCEEDED(rv2), "failed to get/serialize exception");
+    if (NS_FAILED(rv2))
+      rv = rv2;
+  }
+
+end:
+  LOG(("sending INVOKE_REPLY: rv=%x\n", rv));
+
+  // balance CheckInstanceAndAddRef()
+  if (wrapper)
+    wrapper->Release();
+
+  ipcMessageWriter writer(64);
+
+  DConnectInvokeReply reply;
+  reply.opcode_major = DCON_OP_INVOKE_REPLY;
+  reply.opcode_minor = 0;
+  reply.flags = 0;
+  reply.request_index = invoke->request_index;
+  reply.result = rv;
+
+  if (got_exception)
+    reply.flags |= DCON_OP_FLAGS_REPLY_EXCEPTION;
+
+  writer.PutBytes(&reply, sizeof(reply));
+
+  nsVoidArray wrappers;
+
+  if (NS_SUCCEEDED(rv) && params)
+  {
+    // serialize out-params and retvals
+    for (i=0; i<paramCount; ++i)
+    {
+      const nsXPTParamInfo paramInfo = methodInfo->GetParam(i);
+
+      if (paramInfo.IsRetval() || paramInfo.IsOut())
+      {
+        const nsXPTType &type = paramInfo.GetType();
+
+        if (type.IsInterfacePointer())
+        {
+          nsID iid;
+          rv = GetIIDForMethodParam(iinfo, methodInfo, paramInfo, type,
+                                    invoke->method_index, params, PR_TRUE, iid);
+          if (NS_SUCCEEDED(rv))
+            rv = SerializeInterfaceParam(writer, peer, iid,
+                                         (nsISupports *) params[i].val.p, wrappers);
+        }
+        else
+          rv = SerializeParam(writer, type, params[i]);
+
+        if (NS_FAILED(rv))
+        {
+          reply.result = rv;
+          break;
+        }
+      }
+    }
+
+    if (NS_SUCCEEDED(rv))
+    {
+      // serialize output array parameters after everything else since the
+      // deserialization procedure will need to get a size_is value which may be
+      // stored in any preceeding or following param
+      for (i=0; i<paramCount; ++i)
+      {
+        const nsXPTParamInfo &paramInfo = methodInfo->GetParam(i);
+
+        if (paramInfo.GetType().IsArray() &&
+            (paramInfo.IsRetval() || paramInfo.IsOut()))
+        {
+          rv = SerializeArrayParam(this, writer, peer, iinfo, invoke->method_index,
+                                   *methodInfo, params, PR_TRUE, paramInfo,
+                                   params[i].val.p, wrappers);
+          if (NS_FAILED(rv))
+          {
+            reply.result = rv;
+            break;
+          }
+        }
+      }
+    }
+  }
+
+  if (got_exception)
+  {
+    rv = SerializeException(writer, peer, exception, wrappers);
+    NS_ASSERTION(NS_SUCCEEDED(rv), "failed to get/serialize exception");
+  }
+
+  if (NS_FAILED(rv))
+    rv = IPC_SendMessage(peer, kDConnectTargetID, (const PRUint8 *) &reply, sizeof(reply));
+  else
+    rv = IPC_SendMessage(peer, kDConnectTargetID, writer.GetBuffer(), writer.GetSize());
+  if (NS_FAILED(rv))
+  {
+    LOG(("unable to send INVOKE_REPLY: rv=%x\n", rv));
+    ReleaseWrappers(wrappers, peer);
+  }
+
+  if (params)
+  {
+    // free individual elements of arrays (note: before freeing arrays
+    // themselves in FinishParam())
+    for (i=0; i<paramUsed; ++i)
+    {
+      const nsXPTParamInfo &paramInfo = methodInfo->GetParam(i);
+      if (paramInfo.GetType().IsArray())
+        FinishArrayParam(iinfo, invoke->method_index, *methodInfo,
+                         params, PR_TRUE, paramInfo, params[i]);
+    }
+
+    for (i=0; i<paramUsed; ++i)
+      FinishParam(params[i]);
+    delete[] params;
+  }
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.h
new file mode 100644
index 00000000..517b2650
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.h
@@ -0,0 +1,365 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *   Dmitry A. Kuminov <dmik@innotek.de>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// DConnect service is multithreaded by default...
+#if !defined(DCONNECT_SINGLETHREADED) && !defined(DCONNECT_MULTITHREADED)
+#define DCONNECT_MULTITHREADED
+# ifdef VBOX
+//#  define DCONNECT_WITH_IPRT_REQ_POOL
+# endif
+#endif
+
+#include "ipcIDConnectService.h"
+#include "ipcdclient.h"
+
+#include "nsIInterfaceInfo.h"
+#include "nsIInterfaceInfoManager.h"
+
+#include "nsCOMPtr.h"
+#include "nsAutoPtr.h"
+#include "nsDataHashtable.h"
+#include "nsHashKeys.h"
+#include "nsHashSets.h"
+#include "nsVoidArray.h"
+#include "nsAutoLock.h"
+#include "xptcall.h"
+#include "xptinfo.h"
+
+#if defined(DCONNECT_MULTITHREADED)
+# if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+
+#  include <iprt/req.h>
+
+# else /* !DCONNECT_WITH_IPRT_REQ_POOL*/
+
+#include "ipcList.h"
+
+struct DConnectOp;
+
+struct DConnectRequest : public ipcListNode<DConnectRequest>
+{
+  DConnectRequest (PRUint32 aPeer, const DConnectOp *aOp, PRUint32 aOpLen)
+    : peer(aPeer)
+    , opLen(aOpLen)
+  {
+    op = (const DConnectOp *) malloc(aOpLen);
+    memcpy ((void *) op, aOp, aOpLen);
+  }
+  ~DConnectRequest() { free((void *) op); }
+
+  const PRUint32 peer;
+  const DConnectOp *op;
+  const PRUint32 opLen;
+};
+
+# endif // !DCONNECT_WITH_IPRT_REQ_POOL
+#endif // DCONNECT_MULTITHREADED
+
+class nsIException;
+class ipcMessageReader;
+class ipcMessageWriter;
+
+// a key class used to identify DConnectInstance objects stored in a hash table
+// by a composite of peer ID, XPCOM object pointer and IID this pointer represents
+
+class DConnectInstanceKey : public PLDHashEntryHdr
+{
+public:
+  struct Key
+  {
+    Key(PRUint32 aPeer, const nsISupports *aObj, const nsID *aIID)
+      : mPeer (aPeer), mObj (aObj), mIID (aIID) {}
+    const PRUint32 mPeer;
+    const nsISupports *mObj;
+    const nsIID *mIID;
+  };
+
+  typedef const Key &KeyType;
+  typedef const Key *KeyTypePointer;
+
+  DConnectInstanceKey(const Key *aKey) : mKey (*aKey) {}
+  DConnectInstanceKey(const DConnectInstanceKey &toCopy) : mKey (toCopy.mKey) {}
+  ~DConnectInstanceKey() {}
+
+  KeyType GetKey() const { return mKey; }
+  KeyTypePointer GetKeyPointer() const { return &mKey; }
+
+  PRBool KeyEquals(KeyTypePointer aKey) const {
+    return mKey.mPeer == aKey->mPeer &&
+           mKey.mObj == aKey->mObj &&
+           mKey.mIID->Equals(*aKey->mIID);
+  }
+
+  static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
+  static PLDHashNumber HashKey(KeyTypePointer aKey) {
+    return aKey->mPeer ^
+           (NS_PTR_TO_INT32(aKey->mObj) >> 2) ^
+           nsIDHashKey::HashKey(aKey->mIID);
+  }
+  enum { ALLOW_MEMMOVE = PR_TRUE };
+
+private:
+  const Key mKey;
+};
+
+class DConnectInstance;
+typedef nsDataHashtable<DConnectInstanceKey, DConnectInstance *> DConnectInstanceMap;
+
+// extend nsVoidHashSet for compatibility with some nsTHashtable methods
+class DConnectInstanceSet : public nsVoidHashSet
+{
+public:
+  PRBool Init(PRUint32 initSize = PL_DHASH_MIN_SIZE) {
+    return nsVoidHashSet::Init(initSize) == NS_OK;
+  }
+  void Clear() {
+    PL_DHashTableEnumerate(&mHashTable, PL_DHashStubEnumRemove, nsnull);
+  }
+};
+
+typedef PRUint64 DConAddr;
+
+// a key class used to identify DConnectStub objects stored in a hash table
+// by a composite of peer ID and DConAddr
+
+class DConnectStubKey : public PLDHashEntryHdr
+{
+public:
+  struct Key
+  {
+    Key(PRUint32 aPeer, const DConAddr aInstance)
+      : mPeer (aPeer), mInstance (aInstance) {}
+    const PRUint32 mPeer;
+    const DConAddr mInstance;
+  };
+
+  typedef const Key &KeyType;
+  typedef const Key *KeyTypePointer;
+
+  DConnectStubKey(const Key *aKey) : mKey (*aKey) {}
+  DConnectStubKey(const DConnectStubKey &toCopy) : mKey (toCopy.mKey) {}
+  ~DConnectStubKey() {}
+
+  KeyType GetKey() const { return mKey; }
+  KeyTypePointer GetKeyPointer() const { return &mKey; }
+
+  PRBool KeyEquals(KeyTypePointer aKey) const {
+    return mKey.mPeer == aKey->mPeer &&
+           mKey.mInstance == aKey->mInstance;
+  }
+
+  static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
+  static PLDHashNumber HashKey(KeyTypePointer aKey) {
+    return aKey->mPeer ^
+           (NS_PTR_TO_INT32(aKey->mInstance) >> 2);
+  }
+  enum { ALLOW_MEMMOVE = PR_TRUE };
+
+private:
+  const Key mKey;
+};
+
+// used elsewhere like nsAtomTable to safely represent the integral value
+// of an address.
+typedef PRUint64 PtrBits;
+
+// bit flag that defines if a PtrBits value represents a remote object
+#define PTRBITS_REMOTE_BIT 0x1
+
+class DConnectStub;
+typedef nsDataHashtable<DConnectStubKey, DConnectStub *> DConnectStubMap;
+
+class ipcDConnectService : public ipcIDConnectService
+                         , public ipcIMessageObserver
+                         , public ipcIClientObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_IPCIDCONNECTSERVICE
+  NS_DECL_IPCIMESSAGEOBSERVER
+  NS_DECL_IPCICLIENTOBSERVER
+
+  ipcDConnectService();
+
+  NS_HIDDEN_(nsresult) Init();
+  NS_HIDDEN_(void) Shutdown();
+
+  NS_HIDDEN_(nsresult) GetInterfaceInfo(const nsID &iid, nsIInterfaceInfo **);
+  NS_HIDDEN_(nsresult) GetIIDForMethodParam(nsIInterfaceInfo *iinfo,
+                                            const nsXPTMethodInfo *methodInfo,
+                                            const nsXPTParamInfo &paramInfo,
+                                            const nsXPTType &type,
+                                            PRUint16 methodIndex,
+                                            nsXPTCMiniVariant *dispatchParams,
+                                            PRBool isXPTCVariantArray,
+                                            nsID &result);
+
+  NS_HIDDEN_(nsresult) SerializeInterfaceParam(ipcMessageWriter &writer,
+                                               PRUint32 peer, const nsID &iid,
+                                               nsISupports *obj,
+                                               nsVoidArray &wrappers);
+  NS_HIDDEN_(nsresult) DeserializeInterfaceParamBits(PtrBits bits, PRUint32 peer,
+                                                     const nsID &iid,
+                                                     nsISupports *&obj);
+
+  NS_HIDDEN_(nsresult) SerializeException(ipcMessageWriter &writer,
+                                          PRUint32 peer, nsIException *xcpt,
+                                          nsVoidArray &wrappers);
+  NS_HIDDEN_(nsresult) DeserializeException(ipcMessageReader &reader,
+                                            PRUint32 peer, nsIException **xcpt);
+
+  NS_HIDDEN_(void)     ReleaseWrappers(nsVoidArray &wrappers,  PRUint32 peer);
+
+  NS_HIDDEN_(nsresult) CreateStub(const nsID &, PRUint32, DConAddr, DConnectStub **);
+#if 0
+  NS_HIDDEN_(PRBool)   FindStubAndAddRef(PRUint32, const DConAddr, DConnectStub **);
+#endif
+  // public only for DConnectStub::~DConnectStub()
+  NS_HIDDEN_(void)     DeleteStub(DConnectStub *);
+
+  // public only for DConnectInstance::Release()
+  NS_HIDDEN_(void)     DeleteInstance(DConnectInstance *, PRBool locked = PR_FALSE);
+  // public only for DConnectStub::CallMethod()
+  NS_HIDDEN_(PRBool)   CheckInstanceAndAddRef(DConnectInstance *, PRUint32);
+
+  PRLock *StubLock() { return mStubLock; }
+  PRLock *StubQILock() { return mStubQILock; }
+
+  static nsRefPtr <ipcDConnectService> GetInstance() {
+    return nsRefPtr <ipcDConnectService> (mInstance);
+  }
+
+private:
+
+  NS_HIDDEN ~ipcDConnectService();
+
+  NS_HIDDEN_(nsresult) StoreInstance(DConnectInstance *);
+  NS_HIDDEN_(PRBool)   FindInstanceAndAddRef(PRUint32,
+                                             const nsISupports *,
+                                             const nsIID *,
+                                             DConnectInstance **);
+
+  NS_HIDDEN_(nsresult) StoreStub(DConnectStub *);
+
+  NS_HIDDEN_(void) OnIncomingRequest(PRUint32 peer, const struct DConnectOp *op, PRUint32 opLen);
+
+  NS_HIDDEN_(void) OnSetup(PRUint32 peer, const struct DConnectSetup *, PRUint32 opLen);
+  NS_HIDDEN_(void) OnRelease(PRUint32 peer, const struct DConnectRelease *);
+  NS_HIDDEN_(void) OnInvoke(PRUint32 peer, const struct DConnectInvoke *, PRUint32 opLen);
+
+#if defined(DCONNECT_MULTITHREADED)
+# if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+  static DECLCALLBACK(void) ProcessMessageOnWorkerThread(ipcDConnectService *aThis, PRUint32 aSenderID, void *aData, PRUint32 aDataLen);
+# else
+  NS_HIDDEN_(nsresult) CreateWorker();
+# endif
+#endif
+
+private:
+  nsCOMPtr<nsIInterfaceInfoManager> mIIM;
+
+  // lock to protect access to instance sets and the disconnected flag
+  PRLock *mLock;
+
+  // table of local object instances allocated on behalf of a peer
+  // (keys are interface pointers of real objects these instances represent)
+  DConnectInstanceMap mInstances;
+  // hashset containing the same instances as above
+  // (used for quick parameter validity checks)
+  DConnectInstanceSet mInstanceSet;
+
+  // lock to protect access to mStubs and DConnectStub::mRefCntLevels
+  // (also guards every DConnectStub::Release call to provide atomicity)
+  PRLock *mStubLock;
+
+  // table of remote object stubs allocated to communicate with peer's instances
+  DConnectStubMap mStubs;
+
+  // this is true after IPC_Shutdown() has been called
+  PRBool mDisconnected;
+
+// member is never initialized or used, no point in wasting memory or making
+// someone believe it contains anything relevant
+#ifndef VBOX
+  // our IPC client ID
+  PRUint32 mSelfID;
+#endif
+
+  // global lock to protect access to protect DConnectStub::QueryInterface()
+  // (we cannot use mStubLock because it isn't supposed to be held long,
+  // like in case of an IPC call and such)
+  PRLock *mStubQILock;
+
+#if defined(DCONNECT_MULTITHREADED)
+# if defined(DCONNECT_WITH_IPRT_REQ_POOL)
+
+  /** Request pool. */
+  RTREQPOOL mhReqPool;
+
+# else
+
+  friend class DConnectWorker;
+
+  // pool of worker threads to serve incoming requests
+  nsVoidArray mWorkers;
+  // queue of pending requests
+  ipcList<DConnectRequest> mPendingQ;
+  // monitor to protect mPendingQ
+  PRMonitor *mPendingMon;
+  // number of waiting workers
+  PRUint32 mWaitingWorkers;
+  // monitor used to wait on changes in mWaitingWorkers.
+  PRMonitor *mWaitingWorkersMon;
+# endif
+#endif
+
+  // global ipcDConnectService instance for internal usage
+  static ipcDConnectService *mInstance;
+};
+
+#define IPC_DCONNECTSERVICE_CLASSNAME \
+  "ipcDConnectService"
+#define IPC_DCONNECTSERVICE_CONTRACTID \
+  "@mozilla.org/ipc/dconnect-service;1"
+#define IPC_DCONNECTSERVICE_CID                    \
+{ /* 63a5d9dc-4828-425a-bd50-bd10a4b26f2c */       \
+  0x63a5d9dc,                                      \
+  0x4828,                                          \
+  0x425a,                                          \
+  {0xbd, 0x50, 0xbd, 0x10, 0xa4, 0xb2, 0x6f, 0x2c} \
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/Makefile.in
new file mode 100644
index 00000000..2d511de2
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/Makefile.in
@@ -0,0 +1,33 @@
+# vim:set ts=8 sw=8 noet:
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = dconnect
+
+REQUIRES	= ipcd \
+		  nspr \
+		  string \
+		  xpcom \
+		  $(NULL)
+
+CPPSRCS = \
+  TestDConnect.cpp \
+  $(NULL)
+
+SIMPLE_PROGRAMS	= $(CPPSRCS:.cpp=$(BIN_SUFFIX))
+
+include $(topsrcdir)/config/config.mk
+
+LIBS = \
+  $(EXTRA_DSO_LIBS) \
+  $(XPCOM_LIBS) \
+  $(NSPR_LIBS) \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestClient.js b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestClient.js
new file mode 100644
index 00000000..8403fcdd
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestClient.js
@@ -0,0 +1,106 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/**
+ * This file contains code that mirrors the code in TestDConnect.cpp:DoTest
+ */
+
+const ipcIService          = Components.interfaces.ipcIService;
+const ipcIDConnectService  = Components.interfaces.ipcIDConnectService;
+const nsIFile              = Components.interfaces.nsIFile;
+const nsILocalFile         = Components.interfaces.nsILocalFile;
+const nsIEventQueueService = Components.interfaces.nsIEventQueueService;
+
+// XXX use directory service for this
+const TEST_PATH = "/tmp";
+
+var serverID = 0;
+
+function findServer()
+{
+  var ipc = Components.classes["@mozilla.org/ipc/service;1"].getService(ipcIService); 
+  serverID = ipc.resolveClientName("test-server");
+}
+
+function doTest()
+{
+  var dcon = Components.classes["@mozilla.org/ipc/dconnect-service;1"]
+                       .getService(ipcIDConnectService); 
+
+  var file = dcon.createInstanceByContractID(serverID, "@mozilla.org/file/local;1", nsIFile);
+
+  var localFile = file.QueryInterface(nsILocalFile);
+
+  localFile.initWithPath(TEST_PATH);
+
+  if (file.path != TEST_PATH)
+  {
+    dump("*** path test failed [path=" + file.path + "]\n");
+    return;
+  }
+
+  dump("file exists: " + file.exists() + "\n");
+
+  var clone = file.clone();
+
+  const node = "hello.txt";
+  clone.append(node);
+  dump("files are equal: " + file.equals(clone) + "\n");
+
+  if (!clone.exists())
+    clone.create(nsIFile.NORMAL_FILE_TYPE, 0600);
+
+  clone.moveTo(null, "helloworld.txt");
+
+  var localObj = Components.classes["@mozilla.org/file/local;1"].createInstance(nsILocalFile);
+  localObj.initWithPath(TEST_PATH);
+  dump("file.equals(localObj) = " + file.equals(localObj) + "\n");
+  dump("localObj.equals(file) = " + localObj.equals(file) + "\n");
+}
+
+function setupEventQ()
+{
+  var eqs = Components.classes["@mozilla.org/event-queue-service;1"]
+                      .getService(nsIEventQueueService);  
+  eqs.createMonitoredThreadEventQueue();
+}
+
+setupEventQ();
+findServer();
+dump("\n---------------------------------------------------\n");
+doTest();
+dump("---------------------------------------------------\n\n");
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestDConnect.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestDConnect.cpp
new file mode 100644
index 00000000..8eabe13c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestDConnect.cpp
@@ -0,0 +1,268 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcIService.h"
+#include "ipcIDConnectService.h"
+#include "ipcCID.h"
+
+#include "nsIEventQueueService.h"
+#include "nsIServiceManager.h"
+#include "nsIComponentRegistrar.h"
+
+#include "nsXPCOMCID.h"
+#include "nsILocalFile.h"
+
+#include "nsString.h"
+#include "prmem.h"
+
+#if defined( XP_WIN ) || defined( XP_OS2 )
+#define TEST_PATH "c:"
+#else
+#define TEST_PATH "/tmp"
+#endif
+
+#define RETURN_IF_FAILED(rv, step) \
+    PR_BEGIN_MACRO \
+    if (NS_FAILED(rv)) { \
+        printf("*** %s failed: rv=%x\n", step, rv); \
+        return rv;\
+    } \
+    PR_END_MACRO
+
+static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
+static nsIEventQueue* gEventQ = nsnull;
+static PRBool gKeepRunning = PR_TRUE;
+
+static ipcIService *gIpcServ = nsnull;
+
+static nsresult DoTest()
+{
+  nsresult rv;
+
+  nsCOMPtr<ipcIDConnectService> dcon = do_GetService("@mozilla.org/ipc/dconnect-service;1", &rv);
+  RETURN_IF_FAILED(rv, "getting dconnect service");
+
+  PRUint32 remoteClientID = 1;
+
+  nsCOMPtr<nsIFile> file;
+  rv = dcon->CreateInstanceByContractID(remoteClientID,
+                                        NS_LOCAL_FILE_CONTRACTID,
+                                        NS_GET_IID(nsIFile),
+                                        getter_AddRefs(file)); 
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsCOMPtr<nsISupports> sup = do_QueryInterface(file, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  printf("*** calling QueryInterface\n");
+  nsCOMPtr<nsILocalFile> localFile = do_QueryInterface(file, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoString path;
+  path.AssignLiteral(TEST_PATH);
+
+  printf("*** calling InitWithNativePath\n");
+  rv = localFile->InitWithPath(path);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  nsAutoString buf;
+  rv = file->GetPath(buf);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (!buf.Equals(path))
+  {
+    NS_ConvertUTF16toUTF8 temp(buf);
+    printf("*** GetPath erroneously returned [%s]\n", temp.get());
+    return NS_ERROR_FAILURE;
+  }
+
+  PRBool exists;
+  rv = file->Exists(&exists);
+  if (NS_FAILED(rv))
+  {
+    printf("*** Exists test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+  printf("File exists? [%d]\n", exists);
+
+  nsCOMPtr<nsIFile> clone;
+  rv = file->Clone(getter_AddRefs(clone));
+  if (NS_FAILED(rv))
+  {
+    printf("*** Clone test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+
+  nsAutoString node;
+  node.AssignLiteral("hello.txt");
+
+  rv = clone->Append(node);
+  if (NS_FAILED(rv))
+  {
+    printf("*** Append test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+
+  PRBool match;
+  rv = file->Equals(clone, &match);
+  if (NS_FAILED(rv))
+  {
+    printf("*** Equals test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+  printf("Files are equals? [%d]\n", match);
+
+  // now test passing null for interface pointer
+
+  rv = clone->Exists(&exists);
+  if (NS_FAILED(rv))
+  {
+    printf("*** Exists test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+  if (!exists)
+  {
+    rv = clone->Create(nsIFile::NORMAL_FILE_TYPE, 0600);
+    if (NS_FAILED(rv))
+    {
+      printf("*** Create test failed [rv=%x]\n", rv);
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  rv = clone->MoveTo(nsnull, NS_LITERAL_STRING("helloworld.txt"));
+  if (NS_FAILED(rv))
+  {
+    printf("*** MoveTo test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+
+  // now test passing local objects to a remote object
+
+  nsCOMPtr<nsILocalFile> myLocalFile;
+  rv = NS_NewLocalFile(path, PR_TRUE, getter_AddRefs(myLocalFile));
+  if (NS_FAILED(rv))
+  {
+    printf("*** NS_NewLocalFile failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+
+  rv = file->Equals(myLocalFile, &match);
+  if (NS_FAILED(rv))
+  {
+    printf("*** second Equals test failed [rv=%x]\n", rv);
+    return NS_ERROR_FAILURE;
+  }
+  printf("Files are equals? [%d]\n", match);
+
+  printf("*** DoTest completed successfully :-)\n");
+  return NS_OK;
+}
+
+int main(int argc, char **argv)
+{
+  nsresult rv;
+
+  PRBool serverMode = PR_FALSE;
+  if (argc > 1)
+  {
+    if (strcmp(argv[1], "-server") == 0)
+    {
+      serverMode = PR_TRUE;
+    }
+    else
+    {
+      printf("usage: %s [-server]\n", argv[0]);
+      return -1;
+    }
+  }
+
+  {
+    nsCOMPtr<nsIServiceManager> servMan;
+    NS_InitXPCOM2(getter_AddRefs(servMan), nsnull, nsnull);
+    nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(servMan);
+    NS_ASSERTION(registrar, "Null nsIComponentRegistrar");
+    if (registrar)
+        registrar->AutoRegister(nsnull);
+
+    // Create the Event Queue for this thread...
+    nsCOMPtr<nsIEventQueueService> eqs =
+             do_GetService(kEventQueueServiceCID, &rv);
+    RETURN_IF_FAILED(rv, "do_GetService(EventQueueService)");
+
+    rv = eqs->CreateMonitoredThreadEventQueue();
+    RETURN_IF_FAILED(rv, "CreateMonitoredThreadEventQueue");
+
+    rv = eqs->GetThreadEventQueue(NS_CURRENT_THREAD, &gEventQ);
+    RETURN_IF_FAILED(rv, "GetThreadEventQueue");
+
+    nsCOMPtr<ipcIService> ipcServ(do_GetService(IPC_SERVICE_CONTRACTID, &rv));
+    RETURN_IF_FAILED(rv, "do_GetService(ipcServ)");
+    NS_ADDREF(gIpcServ = ipcServ);
+
+    if (!serverMode)
+    {
+      rv = DoTest();
+      RETURN_IF_FAILED(rv, "DoTest()");
+    }
+    else
+    {
+      gIpcServ->AddName("DConnectServer");
+    }
+
+    PLEvent *ev;
+    while (gKeepRunning)
+    {
+      gEventQ->WaitForEvent(&ev);
+      gEventQ->HandleEvent(ev);
+    }
+
+    NS_RELEASE(gIpcServ);
+
+    printf("*** processing remaining events\n");
+
+    // process any remaining events
+    while (NS_SUCCEEDED(gEventQ->GetEvent(&ev)) && ev)
+        gEventQ->HandleEvent(ev);
+
+    printf("*** done\n");
+  } // this scopes the nsCOMPtrs
+
+  // no nsCOMPtrs are allowed to be alive when you call NS_ShutdownXPCOM
+  rv = NS_ShutdownXPCOM(nsnull);
+  NS_ASSERTION(NS_SUCCEEDED(rv), "NS_ShutdownXPCOM failed");
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestServer.js b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestServer.js
new file mode 100644
index 00000000..a72e133b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/test/TestServer.js
@@ -0,0 +1,66 @@
+/* vim:set ts=2 sw=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/**
+ * This file contains code for a "server" that does nothing more
+ * than set a name for itself on the IPC system so that the client
+ * can connect and control this process.
+ */
+
+const ipcIService          = Components.interfaces.ipcIService;
+const nsIEventQueueService = Components.interfaces.nsIEventQueueService;
+const nsIEventQueue        = Components.interfaces.nsIEventQueue;
+
+function registerServer()
+{
+  var ipc = Components.classes["@mozilla.org/ipc/service;1"].getService(ipcIService); 
+  ipc.addName("test-server");
+}
+
+function runEventQ()
+{
+  var eqs = Components.classes["@mozilla.org/event-queue-service;1"]
+                      .getService(nsIEventQueueService);  
+  eqs.createMonitoredThreadEventQueue();
+  var queue = eqs.getSpecialEventQueue(eqs.CURRENT_THREAD_EVENT_QUEUE);
+
+  // this never returns
+  queue.eventLoop(); 
+}
+
+registerServer();
+runEventQ();
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/Makefile.in
new file mode 100644
index 00000000..4b94a31f
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/Makefile.in
@@ -0,0 +1,52 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+DIRS        = public src
+
+ifdef ENABLE_TESTS
+DIRS += test
+endif
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/Makefile.in
new file mode 100644
index 00000000..9a08abdb
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/Makefile.in
@@ -0,0 +1,58 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+XPIDL_MODULE = ipcd_lock
+
+EXPORTS		= \
+			ipcLockCID.h \
+			$(NULL)
+
+XPIDLSRCS	= \
+			ipcILockService.idl \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/ipcILockService.idl b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/ipcILockService.idl
new file mode 100644
index 00000000..1cbf8651
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/ipcILockService.idl
@@ -0,0 +1,65 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsISupports.idl"
+
+/**
+ * This service provides named interprocess locking.
+ */
+[scriptable, uuid(9f6dbe15-d851-4b00-912a-5ac0be88a409)]
+interface ipcILockService : nsISupports
+{
+    /**
+     * Call this method to acquire a named interprocess lock.
+     *
+     * @param aLockName
+     *        specifies the name of the lock
+     * @param aWaitIfBusy
+     *        wait for the lock to become available; otherwise, fail if lock
+     *        is already held by some other process.
+     */
+    void acquireLock(in string aLockName,
+                     in boolean aWaitIfBusy);
+
+    /**
+     * Call this method to release a named lock.
+     *
+     * @param aLockName
+     *        specifies the name of the lock
+     */
+    void releaseLock(in string aLockName);
+};
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/ipcLockCID.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/ipcLockCID.h
new file mode 100644
index 00000000..ba756d9b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/public/ipcLockCID.h
@@ -0,0 +1,53 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcLockCID_h__
+#define ipcLockCID_h__
+
+#define IPC_LOCKSERVICE_CLASSNAME \
+    "ipcLockService"
+#define IPC_LOCKSERVICE_CONTRACTID \
+    "@mozilla.org/ipc/lock-service;1"
+#define IPC_LOCKSERVICE_CID                          \
+{ /* d9e56bf8-e32e-4b6d-87f1-06d73b0ce7ca */         \
+    0xd9e56bf8,                                      \
+    0xe32e,                                          \
+    0x4b6d,                                          \
+    {0x87, 0xf1, 0x06, 0xd7, 0x3b, 0x0c, 0xe7, 0xca} \
+}
+
+#endif // !ipcLockCID_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/Makefile.in
new file mode 100644
index 00000000..26d943a8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/Makefile.in
@@ -0,0 +1,69 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+DIRS		= module
+
+MODULE				= ipcd
+LIBRARY_NAME		= ipcdlock_s
+FORCE_STATIC_LIB	= 1
+MODULE_NAME			= ipcd
+
+FORCE_USE_PIC	= 1
+
+REQUIRES	= \
+			xpcom \
+			string \
+			$(NULL)
+
+CPPSRCS		= \
+			ipcLockProtocol.cpp \
+			ipcLockService.cpp \
+			$(NULL)
+
+LOCAL_INCLUDES = \
+			-I$(srcdir)/../../../shared/src \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockProtocol.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockProtocol.cpp
new file mode 100644
index 00000000..5a7e7755
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockProtocol.cpp
@@ -0,0 +1,87 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include <string.h>
+#include "prlog.h"
+#include "ipcLockProtocol.h"
+
+//-----------------------------------------------------------------------------
+
+static inline PRUint8 get_opcode(const PRUint8 *buf)
+{
+    return (buf[0] & 0x0f);
+}
+
+static inline PRUint8 get_flags(const PRUint8 *buf)
+{
+    return (buf[0] & 0xf0) >> 4;
+}
+
+static inline const char *get_key(const PRUint8 *buf)
+{
+    return ((const char *) buf) + 1;
+}
+
+//-----------------------------------------------------------------------------
+
+PRUint8 *
+IPC_FlattenLockMsg(const ipcLockMsg *msg, PRUint32 *bufLen)
+{
+    PRUint32 len = 1                 // header byte
+                 + strlen(msg->key)  // key
+                 + 1;                // null terminator
+
+    PRUint8 *buf = (PRUint8 *) ::operator new(len);
+    if (!buf)
+        return NULL;
+
+    buf[0] = (msg->opcode | (msg->flags << 4));
+
+    memcpy(&buf[1], msg->key, len - 1);
+    *bufLen = len;
+    return buf;
+}
+
+void
+IPC_UnflattenLockMsg(const PRUint8 *buf, PRUint32 bufLen, ipcLockMsg *msg)
+{
+    PR_ASSERT(bufLen > 2); // malformed buffer otherwise
+    msg->opcode = get_opcode(buf);
+    msg->flags = get_flags(buf);
+    msg->key = get_key(buf);
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockProtocol.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockProtocol.h
new file mode 100644
index 00000000..b74b5cde
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockProtocol.h
@@ -0,0 +1,98 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcLockProtocol_h__
+#define ipcLockProtocol_h__
+
+#include "prtypes.h"
+
+//
+// ipc lock message format:
+//
+//   +----------------------------------+
+//   | opcode : 4 bits                  |
+//   +----------------------------------+
+//   | flags  : 4 bits                  |
+//   +----------------------------------+
+//   | key    : null terminated string  |
+//   +----------------------------------+
+//
+
+// lock opcodes
+#define IPC_LOCK_OP_ACQUIRE          1
+#define IPC_LOCK_OP_RELEASE          2
+#define IPC_LOCK_OP_STATUS_ACQUIRED  3
+#define IPC_LOCK_OP_STATUS_FAILED    4
+#define IPC_LOCK_OP_STATUS_BUSY      5
+
+// lock flags
+#define IPC_LOCK_FL_NONBLOCKING 1
+
+// data structure for representing lock request message
+struct ipcLockMsg
+{
+    PRUint8      opcode;
+    PRUint8      flags;
+    const char * key;
+};
+
+//
+// flatten a lock message
+//
+// returns a malloc'd buffer containing the flattened message.  on return,
+// bufLen contains the length of the flattened message.
+//
+PRUint8 *IPC_FlattenLockMsg(const ipcLockMsg *msg, PRUint32 *bufLen);
+
+//
+// unflatten a lock message.  upon return, msg->key points into buf, so
+// buf must not be deallocated until after msg is no longer needed.
+//
+void IPC_UnflattenLockMsg(const PRUint8 *buf, PRUint32 bufLen, ipcLockMsg *msg);
+
+//
+// TargetID for message passing
+//
+#define IPC_LOCK_TARGETID \
+{ /* 703ada8a-2d38-4d5d-9d39-03d1ccceb567 */         \
+    0x703ada8a,                                      \
+    0x2d38,                                          \
+    0x4d5d,                                          \
+    {0x9d, 0x39, 0x03, 0xd1, 0xcc, 0xce, 0xb5, 0x67} \
+}
+
+#endif // !ipcLockProtocol_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockService.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockService.cpp
new file mode 100644
index 00000000..771aa787
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockService.cpp
@@ -0,0 +1,168 @@
+/* vim:set ts=4 sw=4 sts=4 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include "nsDependentString.h"
+#include "nsHashKeys.h"
+#include "nsAutoPtr.h"
+#include "ipcLockService.h"
+#include "ipcLockProtocol.h"
+#include "ipcLog.h"
+#include "prthread.h"
+
+static const nsID kLockTargetID = IPC_LOCK_TARGETID;
+
+//-----------------------------------------------------------------------------
+
+struct ipcPendingLock
+{
+    const char *name;
+    nsresult    status;
+    PRBool      complete;
+};
+
+//-----------------------------------------------------------------------------
+
+nsresult
+ipcLockService::Init()
+{
+    if (PR_NewThreadPrivateIndex(&mTPIndex, nsnull) != PR_SUCCESS)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    // Configure OnMessageAvailable to be called on the IPC thread.  This is
+    // done to allow us to proxy OnAcquireLockComplete events to the right
+    // thread immediately even if the main thread is blocked waiting to acquire
+    // some other lock synchronously.
+
+    return IPC_DefineTarget(kLockTargetID, this, PR_FALSE);
+}
+
+NS_IMPL_THREADSAFE_ISUPPORTS2(ipcLockService, ipcILockService, ipcIMessageObserver)
+
+NS_IMETHODIMP
+ipcLockService::AcquireLock(const char *lockName, PRBool waitIfBusy)
+{
+    LOG(("ipcLockService::AcquireLock [lock=%s wait=%u]\n", lockName, waitIfBusy));
+
+    ipcLockMsg msg;
+    msg.opcode = IPC_LOCK_OP_ACQUIRE;
+    msg.flags = (waitIfBusy ? 0 : IPC_LOCK_FL_NONBLOCKING);
+    msg.key = lockName;
+
+    PRUint32 bufLen;
+    nsAutoPtr<PRUint8> buf( IPC_FlattenLockMsg(&msg, &bufLen) );
+    if (!buf)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    ipcPendingLock pendingLock;
+    pendingLock.name = lockName;
+    pendingLock.status = 0xDEADBEEF; // something bogus
+    pendingLock.complete = PR_FALSE;
+    if (PR_SetThreadPrivate(mTPIndex, &pendingLock) != PR_SUCCESS)
+        return NS_ERROR_UNEXPECTED;
+
+    // prevent our OnMessageAvailable from being called until we explicitly ask
+    // for it to be called via IPC_WaitMessage.
+    IPC_DISABLE_MESSAGE_OBSERVER_FOR_SCOPE(kLockTargetID);
+
+    nsresult rv = IPC_SendMessage(0, kLockTargetID, buf, bufLen);
+    if (NS_SUCCEEDED(rv)) {
+        do {
+            // block the calling thread until we get a response from the daemon
+            rv = IPC_WaitMessage(0, kLockTargetID, this, nsnull, PR_INTERVAL_NO_TIMEOUT);
+        }
+        while (NS_SUCCEEDED(rv) && !pendingLock.complete);
+
+        if (NS_SUCCEEDED(rv))
+            rv = pendingLock.status;
+    }
+
+    // we could clear the TPD, but that isn't really necessary.
+
+    return rv;
+}
+
+NS_IMETHODIMP
+ipcLockService::ReleaseLock(const char *lockName)
+{
+    LOG(("ipcLockService::ReleaseLock [lock=%s]\n", lockName));
+
+    ipcLockMsg msg;
+    msg.opcode = IPC_LOCK_OP_RELEASE;
+    msg.flags = 0;
+    msg.key = lockName;
+
+    PRUint32 bufLen;
+    PRUint8 *buf = IPC_FlattenLockMsg(&msg, &bufLen);
+    if (!buf)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    nsresult rv = IPC_SendMessage(0, kLockTargetID, buf, bufLen);
+    delete buf;
+
+    if (NS_FAILED(rv))
+        return rv;
+
+    return NS_OK;
+}
+
+// called on the same thread that called IPC_WaitMessage
+NS_IMETHODIMP
+ipcLockService::OnMessageAvailable(PRUint32 unused, const nsID &target,
+                                   const PRUint8 *data, PRUint32 dataLen)
+{
+    ipcLockMsg msg;
+    IPC_UnflattenLockMsg(data, dataLen, &msg);
+
+    LOG(("ipcLockService::OnMessageAvailable [lock=%s opcode=%u]\n", msg.key, msg.opcode));
+
+    ipcPendingLock *pendingLock = (ipcPendingLock *) PR_GetThreadPrivate(mTPIndex);
+    if (strcmp(pendingLock->name, msg.key) == 0) {
+        pendingLock->complete = PR_TRUE;
+        if (msg.opcode == IPC_LOCK_OP_STATUS_ACQUIRED)
+            pendingLock->status = NS_OK;
+        else
+            pendingLock->status = NS_ERROR_FAILURE;
+        return NS_OK;
+    }
+
+    LOG(("message does not match; waiting for another...\n"));
+
+    // else, we got a message that another thread is waiting to receive.
+    return IPC_WAIT_NEXT_MESSAGE;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockService.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockService.h
new file mode 100644
index 00000000..6014172b
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/ipcLockService.h
@@ -0,0 +1,63 @@
+/* vim:set ts=4 sw=4 sts=4 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcLockService_h__
+#define ipcLockService_h__
+
+#include "ipcILockService.h"
+#include "ipcdclient.h"
+
+//-----------------------------------------------------------------------------
+
+class ipcLockService : public ipcILockService
+                     , public ipcIMessageObserver
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_IPCILOCKSERVICE
+    NS_DECL_IPCIMESSAGEOBSERVER
+
+    NS_HIDDEN_(nsresult) Init();
+
+private:
+    PRUintn mTPIndex;
+};
+
+//-----------------------------------------------------------------------------
+
+#endif // !ipcLockService_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/Makefile.in
new file mode 100644
index 00000000..b35db1bc
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/Makefile.in
@@ -0,0 +1,92 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE			= ipcd
+LIBRARY_NAME	= lockmodule
+ifeq ($(OS_ARCH), OS2)
+SHORT_LIBNAME = lockmod
+endif
+MODULE_NAME		= ipcd
+
+FORCE_SHARED_LIB	= 1
+NO_DIST_INSTALL	= 1
+NO_INSTALL = 1
+
+ifeq ($(OS_ARCH),Darwin)
+NO_COMPONENT_LINK_MAP = 1
+MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS =
+endif
+
+# required for #include "nsID.h"
+REQUIRES	= \
+			xpcom \
+			$(NULL)
+
+CPPSRCS		= ipcLockModule.cpp
+
+LOCAL_INCLUDES	= \
+			-I$(srcdir)/.. \
+			$(NULL)
+
+EXTRA_OBJS	= ../ipcLockProtocol.$(OBJ_SUFFIX)
+
+EXTRA_DSO_LDOPTS = \
+			$(LIBS_DIR) \
+			$(NSPR_LIBS) \
+			$(EXTRA_DSO_LIBS) \
+			$(EXTRA_OBJS) \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
+_IPC_FILES = \
+    $(DLL_PREFIX)$(LIBRARY_NAME)$(DLL_SUFFIX) \
+    $(NULL)
+
+libs:: $(_IPC_FILES)
+	$(INSTALL) $^ $(DIST)/bin/ipc/modules
+
+install:: $(_IPC_FILES)
+	$(SYSINSTALL) $(IFLAGS1) $^ $(DESTDIR)$(mozappdir)/ipc/modules
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/ipcLockModule.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/ipcLockModule.cpp
new file mode 100644
index 00000000..151c0f89
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/src/module/ipcLockModule.cpp
@@ -0,0 +1,337 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "ipcModuleUtil.h"
+#include "ipcLockProtocol.h"
+#include "plhash.h"
+#include "plstr.h"
+
+#ifdef DEBUG
+#define LOG(args) printf args
+#else
+#define LOG(args)
+#endif
+
+static const nsID kLockTargetID = IPC_LOCK_TARGETID;
+
+static void
+ipcLockModule_Send(PRUint32 cid, const char *key, PRUint8 opcode)
+{
+    ipcLockMsg msg = { opcode, 0, key };
+    PRUint32 bufLen;
+    PRUint8 *buf = IPC_FlattenLockMsg(&msg, &bufLen);
+    if (!buf)
+        return;
+    IPC_SendMsg(cid, kLockTargetID, buf, bufLen);
+    free(buf);
+}
+
+//-----------------------------------------------------------------------------
+
+//
+// gLockTable stores mapping from lock name to ipcLockContext
+//
+static PLHashTable *gLockTable = NULL;
+
+//-----------------------------------------------------------------------------
+
+struct ipcLockContext
+{
+    PRUint32               mOwnerID;     // client ID of this lock's owner
+    struct ipcLockContext *mNextPending; // pointer to client next in line to
+                                         // acquire this lock.
+
+    ipcLockContext(PRUint32 ownerID)
+        : mOwnerID(ownerID)
+        , mNextPending(NULL) {}
+};
+
+//-----------------------------------------------------------------------------
+
+PR_STATIC_CALLBACK(void *)
+ipcLockModule_AllocTable(void *pool, PRSize size)
+{
+    return malloc(size);
+}
+
+PR_STATIC_CALLBACK(void)
+ipcLockModule_FreeTable(void *pool, void *item)
+{
+    free(item);
+}
+
+PR_STATIC_CALLBACK(PLHashEntry *)
+ipcLockModule_AllocEntry(void *pool, const void *key)
+{
+    return (PLHashEntry *) malloc(sizeof(PLHashEntry));
+}
+
+PR_STATIC_CALLBACK(void)
+ipcLockModule_FreeEntry(void *pool, PLHashEntry *he, PRUintn flag)
+{
+    PL_strfree((char *) he->key);
+    free(he);
+}
+
+static const PLHashAllocOps ipcLockModule_AllocOps = {
+    ipcLockModule_AllocTable,
+    ipcLockModule_FreeTable,
+    ipcLockModule_AllocEntry,
+    ipcLockModule_FreeEntry
+};
+
+//-----------------------------------------------------------------------------
+
+static void
+ipcLockModule_AcquireLock(PRUint32 cid, PRUint8 flags, const char *key)
+{
+    LOG(("$$$ acquiring lock [key=%s]\n", key));
+
+    if (!gLockTable)
+        return;
+
+    ipcLockContext *ctx;
+    
+    ctx = (ipcLockContext *) PL_HashTableLookup(gLockTable, key);
+    if (ctx) {
+        //
+        // lock is already acquired, add this client to the queue.  make
+        // sure this client doesn't already own the lock or live on the queue.
+        //
+        while (ctx->mOwnerID != cid && ctx->mNextPending)
+            ctx = ctx->mNextPending;
+        if (ctx->mOwnerID != cid) {
+            //
+            // if nonblocking, then send busy status message.  otherwise,
+            // proceed to add this client to the pending queue.
+            //
+            if (flags & IPC_LOCK_FL_NONBLOCKING)
+                ipcLockModule_Send(cid, key, IPC_LOCK_OP_STATUS_BUSY);
+            else
+                ctx->mNextPending = new ipcLockContext(cid);
+        }
+    }
+    else {
+        //
+        // ok, add this lock to the table, and notify client that it now owns
+        // the lock!
+        //
+        ctx = new ipcLockContext(cid);
+        if (!ctx)
+            return;
+
+        PL_HashTableAdd(gLockTable, PL_strdup(key), ctx);
+
+        ipcLockModule_Send(cid, key, IPC_LOCK_OP_STATUS_ACQUIRED);
+    }
+}
+
+static PRBool
+ipcLockModule_ReleaseLockHelper(PRUint32 cid, const char *key, ipcLockContext *ctx)
+{
+    LOG(("$$$ releasing lock [key=%s]\n", key));
+
+    PRBool removeEntry = PR_FALSE;
+
+    //
+    // lock is already acquired _or_ maybe client is on the pending list.
+    //
+    if (ctx->mOwnerID == cid) {
+        if (ctx->mNextPending) {
+            //
+            // remove this element from the list.  since this is the
+            // first element in the list, instead of removing it we
+            // shift the data from the next context into this one and
+            // delete the next context.
+            //
+            ipcLockContext *next = ctx->mNextPending;
+            ctx->mOwnerID = next->mOwnerID;
+            ctx->mNextPending = next->mNextPending;
+            delete next;
+            //
+            // notify client that it now owns the lock
+            //
+            ipcLockModule_Send(ctx->mOwnerID, key, IPC_LOCK_OP_STATUS_ACQUIRED);
+        }
+        else {
+            delete ctx;
+            removeEntry = PR_TRUE;
+        }
+    }
+    else {
+        ipcLockContext *prev;
+        for (;;) {
+            prev = ctx;
+            ctx = ctx->mNextPending;
+            if (!ctx)
+                break;
+            if (ctx->mOwnerID == cid) {
+                // remove ctx from list
+                prev->mNextPending = ctx->mNextPending;
+                delete ctx;
+                break;
+            }
+        }
+    }
+
+    return removeEntry;
+}
+
+static void
+ipcLockModule_ReleaseLock(PRUint32 cid, const char *key)
+{
+    if (!gLockTable)
+        return;
+
+    ipcLockContext *ctx;
+
+    ctx = (ipcLockContext *) PL_HashTableLookup(gLockTable, key);
+    if (ctx && ipcLockModule_ReleaseLockHelper(cid, key, ctx))
+        PL_HashTableRemove(gLockTable, key);
+}
+
+PR_STATIC_CALLBACK(PRIntn)
+ipcLockModule_ReleaseByCID(PLHashEntry *he, PRIntn i, void *arg)
+{
+    PRUint32 cid = *(PRUint32 *) arg;
+
+    ipcLockContext *ctx = (ipcLockContext *) he->value;
+    if (ctx->mOwnerID != cid)
+        return HT_ENUMERATE_NEXT;
+
+    LOG(("$$$ ipcLockModule_ReleaseByCID [cid=%u key=%s he=%p]\n",
+        cid, (char*)he->key, (void*)he));
+
+    if (ipcLockModule_ReleaseLockHelper(cid, (const char *) he->key, ctx))
+        return HT_ENUMERATE_REMOVE;
+
+    return HT_ENUMERATE_NEXT;
+}
+
+//-----------------------------------------------------------------------------
+
+static void
+ipcLockModule_Init()
+{
+    LOG(("$$$ ipcLockModule_Init\n"));
+
+    gLockTable = PL_NewHashTable(32,
+                                 PL_HashString,
+                                 PL_CompareStrings,
+                                 PL_CompareValues,
+                                 &ipcLockModule_AllocOps,
+                                 NULL);
+}
+
+static void
+ipcLockModule_Shutdown()
+{
+    LOG(("$$$ ipcLockModule_Shutdown\n"));
+    
+    if (gLockTable) {
+        // XXX walk table destroying all ipcLockContext objects
+ 
+        PL_HashTableDestroy(gLockTable);
+        gLockTable = NULL;
+    }
+}
+
+static void
+ipcLockModule_HandleMsg(ipcClientHandle client,
+                        const nsID     &target,
+                        const void     *data,
+                        PRUint32        dataLen)
+{
+    PRUint32 cid = IPC_GetClientID(client);
+
+    LOG(("$$$ ipcLockModule_HandleMsg [cid=%u]\n", cid));
+
+    ipcLockMsg msg;
+    IPC_UnflattenLockMsg((const PRUint8 *) data, dataLen, &msg);
+
+    switch (msg.opcode) {
+    case IPC_LOCK_OP_ACQUIRE:
+        ipcLockModule_AcquireLock(cid, msg.flags, msg.key);
+        break;
+    case IPC_LOCK_OP_RELEASE:
+        ipcLockModule_ReleaseLock(cid, msg.key);
+        break;
+    default:
+        PR_NOT_REACHED("invalid opcode");
+    }
+}
+
+static void
+ipcLockModule_ClientUp(ipcClientHandle client)
+{
+    LOG(("$$$ ipcLockModule_ClientUp [%u]\n", IPC_GetClientID(client)));
+}
+
+static void
+ipcLockModule_ClientDown(ipcClientHandle client)
+{
+    PRUint32 cid = IPC_GetClientID(client);
+
+    LOG(("$$$ ipcLockModule_ClientDown [%u]\n", cid));
+
+    //
+    // enumerate lock table, release any locks held by this client.
+    //
+
+    PL_HashTableEnumerateEntries(gLockTable, ipcLockModule_ReleaseByCID, &cid);
+}
+
+//-----------------------------------------------------------------------------
+
+static ipcModuleMethods gLockMethods =
+{
+    IPC_MODULE_METHODS_VERSION,
+    ipcLockModule_Init,
+    ipcLockModule_Shutdown,
+    ipcLockModule_HandleMsg,
+    ipcLockModule_ClientUp,
+    ipcLockModule_ClientDown
+};
+
+static ipcModuleEntry gLockModuleEntry[] =
+{
+    { IPC_LOCK_TARGETID, &gLockMethods }
+};
+
+IPC_IMPL_GETMODULES(ipcLockModule, gLockModuleEntry)
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/test/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/test/Makefile.in
new file mode 100644
index 00000000..bcf9299a
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/test/Makefile.in
@@ -0,0 +1,67 @@
+# vim:set ts=8 sw=8 noet:
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is IBM Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2004
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@meer.net>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = dconnect
+
+REQUIRES	= ipcd \
+		  nspr \
+		  string \
+		  xpcom \
+		  $(NULL)
+
+CPPSRCS = \
+  TestIPCLocks.cpp \
+  $(NULL)
+
+SIMPLE_PROGRAMS	= $(CPPSRCS:.cpp=$(BIN_SUFFIX))
+
+include $(topsrcdir)/config/config.mk
+
+LIBS = \
+  $(EXTRA_DSO_LIBS) \
+  $(XPCOM_LIBS) \
+  $(NSPR_LIBS) \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/test/TestIPCLocks.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/test/TestIPCLocks.cpp
new file mode 100644
index 00000000..f35e8434
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/lock/test/TestIPCLocks.cpp
@@ -0,0 +1,244 @@
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is IBM Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2004
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// This test program spawns N copies of itself, and each copy spawns M threads.
+// Each thread acquires and releases a named, interprocess lock.
+// Randomized delays are injected at various points to exercise the system, and
+// help expose any race conditions that may exist.
+//
+// Usage: TestIPCLocks [-N]
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "ipcILockService.h"
+#include "ipcLockCID.h"
+#include "nsIServiceManagerUtils.h"
+#include "nsIEventQueueService.h"
+#include "nsCOMPtr.h"
+#include "nsXPCOM.h"
+#include "prproces.h"
+#include "prprf.h"
+
+#if defined(XP_UNIX) || defined(XP_OS2) || defined(XP_BEOS)
+#include <unistd.h>
+static unsigned GetPID()
+{
+  return (unsigned) getpid();
+}
+#elif defined(XP_WIN)
+#include <windows.h>
+static unsigned GetPID()
+{
+  return (unsigned) GetCurrentProcessId();  
+}
+#else
+static unsigned int GetPID()
+{
+  return 0; // implement me!
+}
+#endif
+
+static void LOG(const char *fmt, ... )
+{
+  va_list ap;
+  va_start(ap, fmt);
+  PRUint32 nb = 0;
+  char buf[512];
+
+  nb = PR_snprintf(buf, sizeof(buf), "[%u:%p] ", GetPID(), PR_GetCurrentThread());
+
+  PR_vsnprintf(buf + nb, sizeof(buf) - nb, fmt, ap);
+  buf[sizeof(buf) - 1] = '\0';
+
+  fwrite(buf, strlen(buf), 1, stdout);
+  fflush(stdout);
+
+  va_end(ap);
+}
+
+static void RandomSleep(PRUint32 fromMS, PRUint32 toMS)
+{
+  PRUint32 ms = fromMS + (PRUint32) ((toMS - fromMS) * ((double) rand() / RAND_MAX));
+  //LOG("putting thread to sleep for %u ms\n", ms);
+  PR_Sleep(PR_MillisecondsToInterval(ms));
+}
+
+static ipcILockService *gLockService;
+
+PR_STATIC_CALLBACK(void) TestThread(void *arg)
+{
+  const char *lockName = (const char *) arg;
+
+  LOG("entering TestThread [lock=%s]\n", lockName);
+
+  nsresult rv;
+
+  RandomSleep(1000, 1100);
+
+  //LOG("done sleeping\n");
+
+  rv = gLockService->AcquireLock(lockName, PR_TRUE);
+  if (NS_SUCCEEDED(rv))
+  {
+    //LOG("acquired lock \"%s\"\n", lockName);
+    RandomSleep(500, 1000);
+    //LOG("releasing lock \"%s\"\n", lockName);
+    rv = gLockService->ReleaseLock(lockName);
+    if (NS_FAILED(rv))
+    {
+      LOG("failed to release lock [rv=%x]\n", rv);
+      NS_ERROR("failed to release lock");
+    }
+  }
+  else
+  {
+    LOG("failed to acquire lock [rv=%x]\n", rv);
+    NS_NOTREACHED("failed to acquire lock");
+  }
+
+  LOG("exiting TestThread [lock=%s rv=%x]\n", lockName, rv);
+}
+
+static const char *kLockNames[] = {
+  "foopy",
+  "test",
+  "1",
+  "xyz",
+  "moz4ever",
+  nsnull
+};
+
+static nsresult DoTest()
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIEventQueueService> eqs =
+      do_GetService(NS_EVENTQUEUESERVICE_CONTRACTID, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+
+  rv = eqs->CreateMonitoredThreadEventQueue();
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsCOMPtr<nsIEventQueue> eq;
+  rv = eqs->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(eq));
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsCOMPtr<ipcILockService> lockService =
+      do_GetService(IPC_LOCKSERVICE_CONTRACTID);
+
+  gLockService = lockService;
+
+  PRThread *threads[10] = {0};
+  int i = 0;
+
+  for (const char **lockName = kLockNames; *lockName; ++lockName, ++i)
+  {
+    threads[i] = PR_CreateThread(PR_USER_THREAD,
+                                 TestThread,
+                                 (void *) *lockName,
+                                 PR_PRIORITY_NORMAL,
+                                 PR_GLOBAL_THREAD,
+                                 PR_JOINABLE_THREAD,
+                                 0);
+  }
+
+  for (i=0; threads[i]; ++i)
+  {
+    PR_JoinThread(threads[i]);
+    threads[i] = nsnull;
+  }
+
+  gLockService = nsnull;
+
+  LOG("joined with all threads; exiting DoTest\n");
+  return NS_OK;
+}
+
+int main(int argc, char **argv)
+{
+  LOG("entering main\n");
+
+  int numProcs = 10;
+
+  // if this is a child process, then just run the test
+  if (argc > 1)
+  {
+    if (strcmp(argv[1], "-child") == 0)
+    {
+      RandomSleep(1000, 1000);
+      LOG("running child test\n");
+      NS_InitXPCOM2(nsnull, nsnull, nsnull);
+      DoTest();
+      NS_ShutdownXPCOM(nsnull);
+      return 0;
+    }
+    else if (argv[1][0] == '-')
+    {
+      // argument is a number
+      numProcs = atoi(argv[1] + 1);
+      if (numProcs == 0)
+      {
+        printf("### usage: TestIPCLocks [-N]\n"
+               "where, N is the number of test processes to spawn.\n");
+        return -1;
+      }
+    }
+  }
+
+  LOG("sleeping for 1 second\n");
+  PR_Sleep(PR_SecondsToInterval(1));
+
+  PRProcess **procs = (PRProcess **) malloc(sizeof(PRProcess*) * numProcs);
+  int i;
+
+  // else, spawn the child processes
+  for (i=0; i<numProcs; ++i)
+  {
+    char *const argv[] = {"./TestIPCLocks", "-child", nsnull};
+    LOG("spawning child test\n");
+    procs[i] = PR_CreateProcess("./TestIPCLocks", argv, nsnull, nsnull);
+  }
+
+  PRInt32 exitCode;
+  for (i=0; i<numProcs; ++i)
+    PR_WaitProcess(procs[i], &exitCode);
+  
+  return 0;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/Makefile.in
new file mode 100644
index 00000000..5f80740d
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/Makefile.in
@@ -0,0 +1,52 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+DIRS = common module public src
+
+ifdef ENABLE_TESTS
+DIRS += test
+endif
+
+include $(topsrcdir)/config/rules.mk
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/.cvsignore
new file mode 100644
index 00000000..b292dd21
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/.cvsignore
@@ -0,0 +1,9 @@
+Makefile
+module.rc
+module.res
+tmModule.obj
+transmngr_client.dll
+transmngr_client.pdb
+transmngr_client.exp
+transmngr_client.lib
+transmngr_client.ilk
\ No newline at end of file
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/Makefile.in
new file mode 100644
index 00000000..87277839
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/Makefile.in
@@ -0,0 +1,75 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = transmngr
+LIBRARY_NAME = transmngr_client
+EXPORT_LIBRARY = 1
+IS_COMPONENT = 1
+MODULE_NAME = transmngr
+
+REQUIRES	= ipcd \
+		  string \
+		  xpcom \
+		  $(NULL)
+
+CPPSRCS = tmModule.cpp
+EXPORTS = tmCID.h
+
+SHARED_LIBRARY_LIBS = \
+		$(DIST)/lib/$(LIB_PREFIX)transmngr_s.$(LIB_SUFFIX) \
+		$(DIST)/lib/$(LIB_PREFIX)transmngrcom_s.$(LIB_SUFFIX) \
+		$(NULL)
+
+LOCAL_INCLUDES	= \
+		-I$(srcdir)/../src \
+		-I$(srcdir)/../common \
+		$(NULL)
+
+EXTRA_DSO_LDOPTS = \
+		$(LIBS_DIR) \
+		$(EXTRA_DSO_LIBS) \
+		$(MOZ_COMPONENT_LIBS) \
+		$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/tmCID.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/tmCID.h
new file mode 100644
index 00000000..8ca23b84
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/tmCID.h
@@ -0,0 +1,53 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef tmCID_h__
+#define tmCID_h__
+
+#define TRANSACTION_SERVICE_CLASSNAME \
+    "tmTransactionService"
+#define TRANSACTION_SERVICE_CONTRACTID \
+    "@mozilla.org/transaction/service;1"
+#define TRANSACTION_SERVICE_CID                      \
+{ /* 1403adf4-94d1-4c67-a8ae-d9f86972d378 */         \
+  0x1403adf4,                                        \
+  0x94d1,                                            \
+  0x4c67,                                            \
+  {0xa8, 0xae, 0xd9, 0xf8, 0x69, 0x72, 0xd3, 0x78}   \
+}
+
+#endif // !tmCID_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/tmModule.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/tmModule.cpp
new file mode 100644
index 00000000..2853ba0a
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/build/tmModule.cpp
@@ -0,0 +1,71 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsICategoryManager.h"
+#include "nsIGenericFactory.h"
+#include "nsIServiceManager.h"
+#include "tmCID.h"
+#include "tmTransactionService.h"
+
+//-----------------------------------------------------------------------------
+// Define the contructor function for the objects
+//
+// NOTE: This creates an instance of objects by using the default constructor
+//-----------------------------------------------------------------------------
+NS_GENERIC_FACTORY_CONSTRUCTOR(tmTransactionService)
+
+//-----------------------------------------------------------------------------
+// Define a table of CIDs implemented by this module along with other
+// information like the function to create an instance, contractid, and
+// class name.
+//-----------------------------------------------------------------------------
+static const nsModuleComponentInfo components[] = {
+  { TRANSACTION_SERVICE_CLASSNAME,
+    TRANSACTION_SERVICE_CID,
+    TRANSACTION_SERVICE_CONTRACTID,
+    tmTransactionServiceConstructor },
+    /*
+    tmTransactionServiceRegisterProc,
+    tmTransactionServiceUnregisterProc },
+    */
+};
+
+//-----------------------------------------------------------------------------
+// Implement the NSGetModule() exported function for your module
+// and the entire implementation of the module object.
+//-----------------------------------------------------------------------------
+NS_IMPL_NSGETMODULE(transmngr, components)
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/.cvsignore
new file mode 100644
index 00000000..df8a43a2
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/.cvsignore
@@ -0,0 +1,5 @@
+Makefile
+tmTransaction.obj
+tmVector.obj
+transmgrcom_s.pdb
+transmgrcom_s.lib
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/Makefile.in
new file mode 100644
index 00000000..4521c39a
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/Makefile.in
@@ -0,0 +1,61 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH = ../../../../..
+topsrcdir = @top_srcdir@
+srcdir = @srcdir@
+VPATH = @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = ipcd
+LIBRARY_NAME = transmgrcom_s
+FORCE_STATIC_LIB = 1
+MODULE_NAME	= ipcd
+
+FORCE_USE_PIC	= 1
+
+REQUIRES = \
+  xpcom \
+  $(NULL)
+
+CPPSRCS = \
+  tmTransaction.cpp \
+  tmVector.cpp \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmTransaction.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmTransaction.cpp
new file mode 100644
index 00000000..5fb7e5bf
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmTransaction.cpp
@@ -0,0 +1,107 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include "tmTransaction.h"
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+# include <iprt/mem.h>
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// Constructor(s) & Destructor
+
+tmTransaction::~tmTransaction() {
+  if (mHeader)
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    RTMemFree(mHeader);
+#else
+    free(mHeader);
+#endif
+}
+
+// call only once per lifetime of object. does not reclaim the
+//    raw message, only sets it.
+nsresult
+tmTransaction::Init(PRUint32 aOwnerID,
+                    PRInt32  aQueueID,
+                    PRUint32 aAction,
+                    PRInt32  aStatus,
+                    const PRUint8 *aMessage,
+                    PRUint32 aLength) {
+  nsresult rv = NS_OK;
+  tmHeader *header = nsnull;
+
+  // indicates the message is the entire raw message
+  if (aQueueID == TM_INVALID_ID) {
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    header = (tmHeader*) RTMemAlloc(aLength);
+#else
+    header = (tmHeader*) malloc(aLength);
+#endif
+    if (header) {
+      mRawMessageLength = aLength;
+      memcpy(header, aMessage, aLength);
+    }
+    else
+      rv = NS_ERROR_OUT_OF_MEMORY;
+  }
+  else {   // need to create the tmHeader and concat the message
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    header = (tmHeader*) RTMemAlloc (sizeof(tmHeader) + aLength);
+#else
+    header = (tmHeader*) malloc (sizeof(tmHeader) + aLength);
+#endif
+    if (header) {
+      mRawMessageLength = sizeof(tmHeader) + aLength;
+      header->action = aAction;
+      header->queueID = aQueueID;
+      header->status = aStatus;
+      header->reserved = 0x00000000;
+      if (aLength > 0)     // add the message if it exists
+        memcpy((header + 1), aMessage, aLength);
+    }
+    else
+      rv = NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (NS_SUCCEEDED(rv)) {
+    mOwnerID = aOwnerID;
+    mHeader = header;
+  }
+
+  return rv;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmTransaction.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmTransaction.h
new file mode 100644
index 00000000..b86f20f0
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmTransaction.h
@@ -0,0 +1,234 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmTransaction_H_
+#define _tmTransaction_H_
+
+#include "tmUtils.h"
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// Message format
+//
+// |------------------------------------|--
+// |QueueID                             |  |
+// |------------------------------------|  |
+// | Action - Post/Flush/Attach etc     |  |- this is the tmHeader struct
+// |------------------------------------|  |
+// |Status                              |  | 
+// |------------------------------------|  |
+// |Padding                             |  |
+// |------------------------------------|--
+// |Message Data (payload)              |
+// |------------------------------------|
+//
+// The Attach call is a special case in that it doesn't have a QueueID yet. A
+//   QueueID will be 0's. The message Data will be the Queue Name String which
+//   will be the profile name with a domain attached, a domain being 
+//   [prefs|cookies|etc]
+//
+//////////////////////////////////////////////////////////////////////////////
+
+/**
+  * tmHeader contains various flags identifying 
+  */
+struct tmHeader {
+  PRInt32  queueID;     // will be the index of the queue in the TM, can be < 0
+  PRUint32 action;      // defined by tmUtils.h will be > 0
+  PRInt32  status;      // return values from methods, could be < 0
+  PRUint32 reserved;    // not currently used, maintaining word alignment
+};
+
+/**
+  * Using tmTransaction:
+  *
+  *   After creating a tmTransaction either through new or as a member 
+  *   or local variable a process must call Init() with the proper set of
+  *   arguements to initialize the state of the transaction. tmTransaction is
+  *   set up to accept 3 types of initialization.
+  *
+  *   1) Raw message - All data is carried in the byte pointer aMessage,
+  *      args 2,3,4 should be set to TM_NO_ID and aLength 
+  *      must be set to the full length of aMessage, including null
+  *      termination if the payload is a null-term string and the size of the
+  *      tmHeader struct preceeding the message. Currently this
+  *      format is used at the IPC boundary, where we receive a byte pointer
+  *      from the IPC Daemon.
+  *
+  *   2) Flags only - aQueueID, aAction and aStatus are all set. aMessage
+  *      should be set to nsnull and aLength to 0. This format is used when
+  *      sending reply messages (except for ATTACH_REPLY) and when the TS
+  *      Transaction Service is sending "control" messages to the Manager -
+  *      flush, detach, etc...
+  *
+  *   3) Flags and message - All arguements are set. The aMessage is only
+  *      the message for the client app. aLength should be set to the length
+  *      of aMessage and not include the length of the tmHeader struct.
+  *   
+  *   The only data member you can set post initialization is the QueueID.
+  *      You should only call Init() once in the lifetime of a tmTransaction
+  *      as it doesn't clean up the exisiting data before assigning the new
+  *      data. Therefore it would leak most heinously if Init() were to be
+  *      called twice.
+  *
+  *   mOwnerID only has relevance on the IPC daemon side of things. The 
+  *      Transaction Service has no knowledge of this ID and makes no use
+  *      of it.
+  */
+class tmTransaction
+{
+
+public:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Constructor(s) & Destructor
+
+  tmTransaction(): mHeader(nsnull), mRawMessageLength(0), mOwnerID(0) { }
+
+  virtual ~tmTransaction();
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Public Member Functions
+
+  // Initializer ////////////
+
+  /**
+    * Sets up the internal data of the transaction. Allows for 3 basic ways
+    *   to call this function: No flags and just one big raw message, Just
+    *   flags and no message, and finally flags and message. If the message
+    *   exists it is copied into the transaction.
+    *
+    * @param aOwnerID is given to us by the IPC Daemon and is specific
+    *        to that transport layer. It is only set when transactions
+    *        are sent from the TM to the TS.
+    *
+    * @param aQueueID is the either the destination queue, or the queue from
+    *        where this transaction is eminating
+    *
+    * @param aAction is the action that occured to generate this transaction
+    *
+    * @param aStatus is the success state of the action.
+    *
+    * @param aMessage can be a raw message including the 3 flags above or it
+    *        can be just the "payload" of the transaction that the destination
+    *        process is going deal with.
+    *
+    * @param aLength is the length of the message. If there is a null
+    *        terminated string in the message make sure the length includes
+    *        the null termination.
+    *
+    * @returns NS_OK if everything was successful
+    * @returns NS_ERROR_OUT_OF_MEMORY if allocation of space for the
+    *          copy of the message fails.
+    */
+  nsresult Init(PRUint32 aOwnerID,
+                PRInt32 aQueueID,
+                PRUint32 aAction,
+                PRInt32 aStatus,
+                const PRUint8 *aMessage, 
+                PRUint32 aLength);
+
+  // Data Accessors /////////
+
+  /**
+    * @returns a const byte pointer to the message
+    */
+  const PRUint8* GetMessage() const { return (PRUint8*)(mHeader + 1); }
+
+  /**
+    * @returns the length of the message
+    */
+  PRUint32 GetMessageLength() const { 
+    return (mRawMessageLength > sizeof(tmHeader)) ?
+      (mRawMessageLength - sizeof(tmHeader)) : 0;
+  }
+
+  /**
+    * @returns a const pointer to the memory containing the
+    *          flag information followed immediately by the message
+    *          data.
+    */
+  const PRUint8* GetRawMessage() const { return (PRUint8*) mHeader; }
+
+  /**
+    * @returns the length of the flags and message combined
+    */
+  PRUint32 GetRawMessageLength() const { return mRawMessageLength; }
+
+  /**
+    * @returns the id of the destination or sending queue, depending on the
+    *          direction of the transaction.
+    */
+  PRInt32 GetQueueID() const { return mHeader->queueID; }
+
+  /**
+    * @returns the action represented by this transaction
+    */
+  PRUint32 GetAction() const { return mHeader->action; }
+
+  /**
+    * @returns the success state, if applicable of the action leading
+    *          up to this message
+    */
+  PRInt32 GetStatus() const { return mHeader->status; }
+
+  /**
+    * @returns the client ID (in IPC daemon terms) of the client who initiated
+    *          the exchange that generated this transaction.
+    */
+  PRUint32 GetOwnerID() const { return mOwnerID; }
+
+  // Data Mutator ///////////
+
+  /**
+    * Sets the ID of the destination or source queue. Init should have been
+    *   called before the call to this function.
+    */
+  void SetQueueID(PRInt32 aID) { mHeader->queueID = aID; }
+
+protected:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Variables
+
+  tmHeader* mHeader;            // points to beginning of entire message
+  PRUint32  mRawMessageLength;  // length of entire message, incl tmHeader
+  PRUint32  mOwnerID;           // client who sent this trans. - a IPC ClientID
+
+};
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmUtils.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmUtils.h
new file mode 100644
index 00000000..f85184d3
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmUtils.h
@@ -0,0 +1,93 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmUtils_H_
+#define _tmUtils_H_
+
+#include "nscore.h"
+#include "nsError.h"
+#include "nsID.h"
+#include "prlog.h"
+#include <stdio.h>
+
+// UUID used to identify the Transaction Module in both daemon and client
+// not part of the XPCOM hooks, but rather a means of identifying
+// modules withing the IPC daemon.
+#define TRANSACTION_MODULE_ID                         \
+{ /* c3dfbcd5-f51d-420b-abf4-3bae445b96a9 */          \
+    0xc3dfbcd5,                                       \
+    0xf51d,                                           \
+    0x420b,                                           \
+    {0xab, 0xf4, 0x3b, 0xae, 0x44, 0x5b, 0x96, 0xa9}  \
+}
+
+//static const nsID kTransModuleID = TRANSACTION_MODULE_ID;
+
+///////////////////////////////////////////////////////////////////////////////
+// match NS_ERROR_FOO error code formats
+//
+// only create new errors for those errors that are specific to TM
+
+#define NS_ERROR_MODULE_TM       27   /* XXX goes in nserror.h -- integrating with ns error codes */
+
+#define TM_ERROR                          NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_TM, 1)
+#define TM_ERROR_WRONG_QUEUE              NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_TM, 2)
+#define TM_ERROR_NOT_POSTED               NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_TM, 3)
+#define TM_ERROR_QUEUE_EXISTS             NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_TM, 4)
+#define TM_SUCCESS_DELETE_QUEUE           NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_TM, 6)
+
+
+// XXX clean up:
+#define TM_INVALID_ID 0xFFFFFFFF
+#define TM_INVALID 0xFFFFFFFF
+#define TM_NO_ID 0xFFFFFFFE
+
+// Transaction Actions
+enum {
+  TM_ATTACH = 0, 
+  TM_ATTACH_REPLY,
+  TM_POST,
+  TM_POST_REPLY,
+  TM_NOTIFY,
+  TM_FLUSH,
+  TM_FLUSH_REPLY,
+  TM_DETACH,
+  TM_DETACH_REPLY 
+};
+
+#endif
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmVector.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmVector.cpp
new file mode 100644
index 00000000..99213f27
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmVector.cpp
@@ -0,0 +1,179 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include "tmVector.h"
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+# include <iprt/mem.h>
+#endif
+
+////////////////////////////////////////////////////////////////////////////
+// Constructor(s) & Destructor
+
+// can not be responsible for reclaiming memory pointed to by the void*s in
+//   the collection - how would we reclaim, don't know how they were allocated
+tmVector::~tmVector() {
+  if (mElements)
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    RTMemFree((void*)mElements);
+#else
+    free((void*)mElements);
+#endif
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Public Member Functions
+
+nsresult
+tmVector::Init() {
+
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+  mElements = (void**) RTMemAllocZ (mCapacity * sizeof(void*));
+#else
+  mElements = (void**) calloc (mCapacity, sizeof(void*));
+#endif
+  if (!mElements)
+    return NS_ERROR_OUT_OF_MEMORY;
+  return NS_OK;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// mutators
+
+PRInt32
+tmVector::Append(void *aElement){
+  PR_ASSERT(aElement);
+
+  // make sure there is room
+  if (mNext == mCapacity)
+    if (NS_FAILED(Grow()))
+      return -1;
+
+  // put the element in the array
+  mElements[mNext] = aElement;
+  mCount++;
+
+  // encapsulates the index into a success value
+  return mNext++; // post increment.
+}
+
+void
+tmVector::Remove(void *aElement) {
+  PR_ASSERT(aElement);
+
+  for (PRUint32 index = 0; index < mNext; index++) {
+    if (mElements[index] == aElement) {
+      mElements[index] = nsnull;
+      mCount--;
+      if (index == mNext-1) {   // if we removed the last element
+        mNext--;
+        // don't test for success of the shrink
+        Shrink();
+      }
+    }
+  }
+}
+
+void
+tmVector::RemoveAt(PRUint32 aIndex) {
+  PR_ASSERT(aIndex < mNext);
+
+  // remove the element if it isn't already nsnull
+  if (mElements[aIndex] != nsnull) {
+    mElements[aIndex] = nsnull;
+    mCount--;
+    if (aIndex == mNext-1) {   // if we removed the last element
+      mNext--;
+      // don't test for success of the shrink
+      Shrink();
+    }
+  }
+}
+
+//void*
+//tmVector::operator[](int index) {
+//  if (index < mNext && index >= 0)
+//    return mElements[index];
+//  return nsnull;
+//}
+
+// Does not delete any of the data, merely removes references to them
+void
+tmVector::Clear(){
+  memset(mElements, 0, mCapacity);
+  mCount = 0;
+  mNext = 0;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// Protected Member Functions
+
+// increases the capacity by the growth increment
+nsresult
+tmVector::Grow() {
+
+  PRUint32 newcap = mCapacity + GROWTH_INC;
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+  mElements = (void**) RTMemRealloc(mElements, (newcap * sizeof(void*)));
+#else
+  mElements = (void**) realloc(mElements, (newcap * sizeof(void*)));
+#endif
+  if (mElements) {
+    mCapacity = newcap;
+    return NS_OK;
+  }
+  return NS_ERROR_FAILURE;
+}
+
+// reduces the capacity by the growth increment. leaves room
+//   for one more add before needing to Grow().
+nsresult
+tmVector::Shrink() {
+
+  PRUint32 newcap = mCapacity - GROWTH_INC;
+  if (mNext < newcap) {
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    mElements = (void**) RTMemRealloc(mElements, newcap * sizeof(void*));
+#else
+    mElements = (void**) realloc(mElements, newcap * sizeof(void*));
+#endif
+    if (!mElements)
+      return NS_ERROR_OUT_OF_MEMORY;
+    mCapacity = newcap;
+  }
+  return NS_OK;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmVector.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmVector.h
new file mode 100644
index 00000000..4ddb68ef
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/common/tmVector.h
@@ -0,0 +1,160 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmVector_H_
+#define _tmVector_H_
+
+#include "tmUtils.h"
+
+#define GROWTH_INC 5
+
+/**
+  * A simple, clear, self-growing, collection of objects. typed independant
+  *   basically a growing array. Useful in situations where you need an
+  *   indexed collection but do not know the size in advance and need the
+  *   ability for increase and decrease in size. Not optimized for anything
+  *   in particular, or any size in particular.
+  *
+  * Is able to guarantee the index of an item will
+  *   not change due to removals of a lower indexed item. The growing,
+  *   and shrinking all happens to the end of the collection
+  *
+  * Does not backfill, adds to the end. At some point this should be 
+  *   changed to make best use of space.
+  */
+class tmVector
+{
+public:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Constructor(s) & Destructor
+
+  /**
+    * Set some sane default values to set up the internal storage. Init()
+    *   must be called after construction of the object to allcate the
+    *   backing store.
+    */
+  tmVector() : mNext(0), mCount(0), mCapacity(10), mElements(nsnull) {;}
+
+  /**
+    * Reclaim the memory allocated in the Init() method. 
+    */
+  virtual ~tmVector();
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Public Member Functions
+
+  /**
+    * Allocates the storage back-end
+    *
+    * @returns NS_OK if allocation succeeded
+    * @returns NS_ERROR_OUT_OF_MEMORY if the allocation failed
+    */
+  nsresult Init();
+
+  // mutators
+
+  /**
+    * @returns the index of the element added, if successful
+    * @returns -1 if an error occured during allocation of space
+    */
+  PRInt32 Append(void *aElement);
+
+  /**
+    * This does not collapse the collection, it leaves holes. Note, it also
+    *   doesn't delete the element, it merely removes it from the collection
+    */
+  void Remove(void *aElement);
+
+  /**
+    * This does not collapse the collection, it leaves holes. Note, it also
+    *   doesn't delete the element, it merely removes it from the collection
+    */
+  void RemoveAt(PRUint32 aIndex);
+
+  /**
+    * Does not call delete on the elements since we have no idea how to
+    *   reclaim the memory. Sets all array slots to 0.
+    */
+  void Clear();
+
+  /**
+    * @returns the element at the index indicated, including nsnull if the
+    *          slot is empty.
+    */
+  void* operator[](PRUint32 index) { 
+    PR_ASSERT(index < mNext);
+    return mElements[index]; 
+  }
+
+  /**
+    * @returns the number of elements stored
+    */
+  PRUint32 Count() { return mCount; }
+
+  /**
+    * Meant to be used as the conditional in a loop. |index < size| should
+    *   reach all elements of the collection and not run out of bounds. If
+    *   slots 0,1,4,5,6 contain elements Size() will return 7, Count() will
+    *   return 5.
+    *
+    * @returns the number of slots in the array taken, irrespective of 
+    *          holes in the collection.
+    */
+  PRUint32 Size() { return mNext; }
+
+protected:
+
+  nsresult Grow();     // mCapacity += GROWTH_INC - realloc()s
+  nsresult Shrink();   // mCapacity -= GROWTH_INC - dumb, free, malloc
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Variables
+
+  // bookkeeping variables
+  PRUint32 mNext;             // next element insertion slot (0 based)
+  PRUint32 mCount;            // how many elements in the Vector (1 based)
+  PRUint32 mCapacity;         // current capacity of the Vector (1 based)
+
+  // the actual array of objects being stored
+  void **mElements;
+
+private:
+
+};
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/.cvsignore
new file mode 100644
index 00000000..ccfb2bc3
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/.cvsignore
@@ -0,0 +1,11 @@
+Makefile
+module.rc
+module.res
+tmIPCModule.obj
+tmQueue.obj
+tmTransactionManager.obj
+transmgr.dll
+transmgr.exp
+transmgr.ilk
+transmgr.lib
+transmgr.pdb
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/Makefile.in
new file mode 100644
index 00000000..b8baa225
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/Makefile.in
@@ -0,0 +1,100 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH = ../../../../..
+topsrcdir = @top_srcdir@
+srcdir = @srcdir@
+VPATH = @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = ipcd
+LIBRARY_NAME = transmgr
+MODULE_NAME = ipcd
+
+FORCE_SHARED_LIB	= 1
+NO_DIST_INSTALL	= 1
+NO_INSTALL = 1
+
+ifeq ($(OS_ARCH),Darwin)
+NO_COMPONENT_LINK_MAP = 1
+MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS =
+endif
+
+REQUIRES	= nspr \
+		  xpcom \
+		  $(NULL)
+
+CPPSRCS = \
+  tmIPCModule.cpp \
+  tmQueue.cpp \
+  tmTransactionManager.cpp \
+  $(NULL)
+
+EXPORTS = \
+  tmIPCModule.h \
+  $(NULL)
+
+LOCAL_INCLUDES = \
+  -I$(srcdir)/../common \
+  $(NULL)
+
+include $(topsrcdir)/config/config.mk
+
+LIBS = \
+  $(EXTRA_DSO_LIBS) \
+  $(NSPR_LIBS) \
+  $(NULL)
+
+EXTRA_DSO_LDOPTS = \
+  $(LIBS_DIR) \
+  $(NSPR_LIBS) \
+  $(DIST)/lib/$(LIB_PREFIX)transmgrcom_s.$(LIB_SUFFIX) \
+  $(EXTRA_DSO_LIBS) \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
+_IPC_FILES = \
+  $(DLL_PREFIX)$(LIBRARY_NAME)$(DLL_SUFFIX) \
+  $(NULL)
+
+libs:: $(_IPC_FILES)
+	$(INSTALL) $^ $(DIST)/bin/ipc/modules
+
+install:: $(_IPC_FILES)
+	$(SYSINSTALL) $(IFLAGS1) $^ $(DESTDIR)$(mozappdir)/ipc/modules
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmIPCModule.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmIPCModule.cpp
new file mode 100644
index 00000000..3982c93c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmIPCModule.cpp
@@ -0,0 +1,137 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "tmIPCModule.h"
+#include "tmTransaction.h"
+#include "tmTransactionManager.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// IPC Daemon hookup stuff
+
+// functionpointer array giving access to this module from the IPC daemon
+static ipcModuleMethods gTransMethods =
+{
+    IPC_MODULE_METHODS_VERSION,
+    tmIPCModule::Init,
+    tmIPCModule::Shutdown,
+    tmIPCModule::HandleMsg
+};
+
+static ipcModuleEntry gTransModuleEntry[] =
+{
+    { TRANSACTION_MODULE_ID, &gTransMethods }
+};
+
+IPC_IMPL_GETMODULES(TransactionModule, gTransModuleEntry)
+
+static const nsID kTransModuleID = TRANSACTION_MODULE_ID;
+
+///////////////////////////////////////////////////////////////////////////////
+// Define global variable
+
+tmTransactionManager *tmIPCModule::tm;
+
+///////////////////////////////////////////////////////////////////////////////
+// IPC Module API
+
+void
+tmIPCModule::Init() {
+  if (!tm)
+    InitInternal();
+}
+
+void
+tmIPCModule::Shutdown() {
+  if (tm) {
+    delete tm;
+    tm = nsnull;
+  }
+}
+
+// straight pass-through, don't check args, let the TM do it.
+void
+tmIPCModule::HandleMsg(ipcClientHandle client, const nsID &target, 
+                       const void *data, PRUint32 dataLen) {
+
+  // make sure the trans mngr is there
+  if (!tm && (InitInternal() < 0))
+    return;
+
+  // create the transaction
+  tmTransaction *trans = new tmTransaction();
+
+  // initialize it
+  if (trans) {
+    if(NS_SUCCEEDED(trans->Init(IPC_GetClientID(client),  // who owns it
+                                TM_INVALID_ID,            // in data
+                                TM_INVALID,               // in data
+                                TM_INVALID,               // in data
+                                (PRUint8 *)data,          // raw message
+                                dataLen))) {              // length of message
+      // pass it on to the trans mngr
+      tm->HandleTransaction(trans);
+    }
+    else
+      delete trans;
+  }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// tmIPCModule API
+
+// straight pass-through, don't check args, let the TS & TM do it.
+void
+tmIPCModule::SendMsg(PRUint32 aDestClientIPCID, tmTransaction *aTransaction) {
+
+  IPC_SendMsg(aDestClientIPCID,
+              kTransModuleID,
+              (void *)aTransaction->GetRawMessage(),
+              aTransaction->GetRawMessageLength());
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Protected Methods
+
+PRInt32
+tmIPCModule::InitInternal() {
+
+  tm = new tmTransactionManager();
+  if (tm)
+    return tm->Init();
+  return -1;
+}
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmIPCModule.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmIPCModule.h
new file mode 100644
index 00000000..d4623b1e
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmIPCModule.h
@@ -0,0 +1,109 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmIPCModule_H_
+#define _tmIPCModule_H_
+
+#include "ipcModuleUtil.h"
+#include "tmUtils.h"
+
+// forward declarations
+class tmTransaction;
+class tmTransactionManager;
+
+/**
+  * Basically an interface between the tmTransactionManager and the IPC
+  *   daemon. Does little else than format the data from one party into
+  *   a format understandable to the other.
+  *
+  * The reason for this class is to try and abstract the transportation 
+  *   layer the transaction service uses. By using this class the Transaction
+  *   Manager itself only needs to know that clients are identified by 
+  *   PRUint32 IDs. 
+  */
+class tmIPCModule
+{
+public:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // ipcModule API - called from IPC daemon
+
+  /**
+    * Clean up the TM
+    */
+  static void Shutdown();
+
+  /**
+    * Check the TM, create it if neccessary.
+    */
+  static void Init();
+
+  /**
+    * Receives a message from the IPC daemon, creates a transaction and sends
+    *   it to the TM to deal with.
+    */
+  static void HandleMsg(ipcClientHandle client,
+                        const nsID     &target,
+                        const void     *data,
+                        PRUint32        dataLen);
+
+  ////////////////////////////////////////////////////////////////////////////
+  // tmIPCModule API - called from tmTransactionManager
+
+  /**
+    * Sends the message to the IPC daemon to be deliverd to the client arg.
+    */
+  static void SendMsg(PRUint32 aDestClientIPCID, tmTransaction *aTransaction);
+
+protected:
+
+  /**
+    * tm should be null coming into this method. This does NOT delete tm
+    *   first. 
+    *
+    * @returns NS_OK if everything succeeds
+    * @returns -1 if initialization fails
+    */
+  static PRInt32 InitInternal();
+
+  static tmTransactionManager *tm;
+
+};
+
+#endif
+
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmQueue.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmQueue.cpp
new file mode 100644
index 00000000..5164446f
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmQueue.cpp
@@ -0,0 +1,223 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "plstr.h"
+#include "tmQueue.h"
+#include "tmTransaction.h"
+#include "tmTransactionManager.h"
+#include "tmUtils.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// Constructors & Destructor
+
+tmQueue::~tmQueue() {
+
+  // empty the vectors
+  PRUint32 index = 0;
+  PRUint32 size = mTransactions.Size();
+  for ( ; index < size ; index++) {
+    if (mTransactions[index])
+      delete (tmTransaction *)mTransactions[index];
+  }
+
+  // don't need to delete the mListeners because 
+  // we just insert PRUint32s, no allocation
+
+  mTM = nsnull;
+  mID = 0;
+  if (mName)
+    PL_strfree(mName);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Public Methods
+
+PRInt32
+tmQueue::Init(const char* aName, PRUint32 aID, tmTransactionManager *aTM) {
+  PR_ASSERT(mTM == nsnull);
+
+  if (NS_SUCCEEDED(mTransactions.Init()) &&
+      NS_SUCCEEDED(mListeners.Init()) &&
+      ((mName = PL_strdup(aName)) != nsnull) ) {
+    mTM = aTM;
+    mID = aID;
+    return NS_OK;
+  }
+  return -1;
+}
+
+PRInt32
+tmQueue::AttachClient(PRUint32 aClientID) {
+
+  PRInt32 status = NS_OK;                 // success of adding client
+
+  if (!IsAttached(aClientID)) {
+    // add the client to the listener list -- null safe call
+    status = mListeners.Append((void*) aClientID);
+  }
+  else
+    status = -2;
+
+  // create & init a reply transaction
+  tmTransaction trans;
+  if (NS_SUCCEEDED(trans.Init(aClientID,        // owner's ipc ID
+                              mID,              // client gets our ID
+                              TM_ATTACH_REPLY,  // action
+                              status,           // success of the add
+                              (PRUint8*)mName,  // client matches name to ID
+                              PL_strlen(mName)+1))) {
+    // send the reply
+    mTM->SendTransaction(aClientID, &trans);
+  }
+
+  // if we successfully added the client - send all current transactions
+  if (status >= 0) { // append returns the index of the added element
+    
+    PRUint32 size = mTransactions.Size();
+    for (PRUint32 index = 0; index < size; index++) {
+      if (mTransactions[index])
+        mTM->SendTransaction(aClientID, (tmTransaction*) mTransactions[index]);
+    }
+  }
+  return status;
+}
+
+PRInt32
+tmQueue::DetachClient(PRUint32 aClientID) {
+
+  PRUint32 size = mListeners.Size();
+  PRUint32 id = 0;
+  PRInt32 status = -1;
+
+  for (PRUint32 index = 0; index < size; index++) {
+    id = (PRUint32)NS_PTR_TO_INT32(mListeners[index]);
+    if(id == aClientID) {
+      mListeners.RemoveAt(index);
+      status = NS_OK;
+      break;
+    }
+  }
+
+  tmTransaction trans;
+  if (NS_SUCCEEDED(trans.Init(aClientID,
+                               mID,
+                               TM_DETACH_REPLY,
+                               status,
+                               nsnull,
+                               0))) {
+    // send the reply
+    mTM->SendTransaction(aClientID, &trans);
+  }
+
+  // if we've removed all the listeners, remove the queue.
+  if (mListeners.Size() == 0)
+    return TM_SUCCESS_DELETE_QUEUE;
+  return status;
+}
+
+void
+tmQueue::FlushQueue(PRUint32 aClientID) {
+
+  if(!IsAttached(aClientID))
+    return;
+
+  PRUint32 size = mTransactions.Size();
+  for (PRUint32 index = 0; index < size; index++)
+    if (mTransactions[index])
+      delete (tmTransaction*)mTransactions[index];
+
+  mTransactions.Clear();
+
+  tmTransaction trans;
+  if (NS_SUCCEEDED(trans.Init(aClientID,
+                               mID, 
+                               TM_FLUSH_REPLY, 
+                               NS_OK,
+                               nsnull,
+                               0))) {
+    mTM->SendTransaction(aClientID, &trans);
+  }
+}
+
+PRInt32
+tmQueue::PostTransaction(tmTransaction *aTrans) {
+
+  PRInt32 status = -1;
+  PRUint32 ownerID = aTrans->GetOwnerID();
+
+  // if we are attached, have the right queue and have successfully
+  //    appended the transaction to the queue, send the transaction
+  //    to all the listeners.
+
+  if (IsAttached(ownerID) && aTrans->GetQueueID() == mID)
+    status = mTransactions.Append(aTrans);
+
+  if (status >= 0) {
+    // send the transaction to all members of mListeners except the owner
+    PRUint32 size = mListeners.Size();
+    PRUint32 id = 0;
+    for (PRUint32 index = 0; index < size; index++) {
+      id = (PRUint32)NS_PTR_TO_INT32(mListeners[index]);
+      if (ownerID != id)
+        mTM->SendTransaction(id, aTrans);
+    }
+  }
+
+  tmTransaction trans;
+  if (NS_SUCCEEDED(trans.Init(ownerID,
+                              mID,
+                              TM_POST_REPLY,
+                              status,
+                              nsnull,
+                              0))) {
+    // send the reply
+    mTM->SendTransaction(ownerID, &trans);
+  }
+  return status;
+}
+
+PRBool
+tmQueue::IsAttached(PRUint32 aClientID) {
+  // XXX could be an issue if the aClientID is 0 and there
+  // is a "hole" in the mListeners vector. - may NEED to store PRUint32*s
+  PRUint32 size = mListeners.Size();
+  for (PRUint32 index = 0; index < size; index++) {
+    if (aClientID == (PRUint32)NS_PTR_TO_INT32(mListeners[index]))
+      return PR_TRUE;
+  }
+  return PR_FALSE;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmQueue.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmQueue.h
new file mode 100644
index 00000000..1c680084
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmQueue.h
@@ -0,0 +1,186 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmQueue_H_
+#define _tmQueue_H_
+
+#include "tmUtils.h"
+#include "tmVector.h"
+
+class tmClient;
+class tmTransaction;
+class tmTransactionManager;
+
+/**
+  * This class isn't so much a queue as it is storage for transactions. It
+  *   is set up to recieve and store transactions in a growing collection
+  *   (using tmVectors). Different messages can be recieved from the 
+  *   Transaction Manager(TM) the queue belongs to which can add and remove
+  *   listeners, empty the queue (flush), and add messages to the queue.
+  *
+  * See the documentation in tmTransactionService.h for details on the
+  *   messages you can send to and recieve from the queues in the TM
+  */
+class tmQueue
+{
+
+public:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Constructor & Destructor
+
+  /**
+    * Set the internal state to default values. Init() must be called 
+    *   after construction to allocate the storage and set the name and ID.
+    */
+  tmQueue(): mID(0), mName(nsnull), mTM(nsnull) { }
+
+  /**
+    * Reclaim the memory allocated in Init(). Destroys the transactions in
+    *   the transaction storage and the ids in the listener storage
+    */
+  virtual ~tmQueue();
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Public Member Functions
+
+  /**
+    * Initialize internal storage vectors and set the name of the queue
+    *   and the pointer to the TM container.
+    *
+    * @returns NS_OK if everything succeeds
+    * @returns -1 if initialization fails
+    */
+  PRInt32 Init(const char* aName, PRUint32 aID, tmTransactionManager *aTM);
+
+  // Queue Operations
+
+  /**
+    * Adds the clientID to the list of queue listeners. A reply is created
+    *   and sent to the client. The reply contains both the name of the
+    *   queue and the id, so the client can match the id to the name and
+    *   then use the id in all further communications to the queue. All
+    *   current transactions in the queue are then sent to the client.
+    *
+    * If the client was already attached the reply is sent, but not the
+    *   outstanding transactions, the assumption being made that all 
+    *   transactions have already been sent to the client.
+    *
+    * The reply is sent for all cases, with the return value in the status
+    *   field.
+    *
+    * @returns >= 0 if the client was attached successfully
+    * @returns -1 if the client was not attached
+    * @returns -2 if the client was already attached
+    */
+  PRInt32 AttachClient(PRUint32 aClientID);
+
+  /**
+    * Removes the client from the list of queue listeners. A reply is created
+    *   and sent to the client to indicate the success of the removal.
+    *
+    * The reply is sent for all cases, with the status field set to either
+    *   -1 or NS_OK.
+    *
+    * @returns NS_OK on success
+    * @returns -1 if client is not attached to this queue
+    * @returns TM_SUCCESS_DELETE_QUEUE if there are no more listeners,
+    *          instructing the Transaction Mangaer to delete the queue.
+    */
+  PRInt32 DetachClient(PRUint32 aClientID);
+
+  /**
+    * Removes all the transactions being held in the queue.
+    *   A reply is created and sent to the client to indicate the
+    *   completion of the operation.
+    */
+  void FlushQueue(PRUint32 aClientID);
+
+  /**
+    * Places the transaction passed in on the queue. Takes ownership of the
+    *   transaction, deletes it in the destructor. A reply is created and
+    *   sent to the client to indicate the success of the posting of the
+    *   transaction.
+    *
+    * The reply is sent for all cases, with the status field containing the
+    *   return value.
+    *
+    * @returns >= 0 if the message was posted properly. 
+    * @returns -1 if the client posting is not attached to this queue,
+    *          if the transaction has been posted to the wrong queue or
+    *          if an error occured when trying to add the post to the 
+    *          internal storage.
+    */
+  PRInt32 PostTransaction(tmTransaction *aTrans);
+
+  // Accessors
+
+  /**
+    * @returns the ID of the queue
+    */
+  PRUint32 GetID() const { return mID; }
+
+  /**
+    * @returns the name of the queue
+    */
+  const char* GetName() const { return mName; }
+
+protected:
+
+  /**
+    * Helper method to determine if the client has already attached.
+    *
+    * @returns PR_TRUE if the client is attached to the queue.
+    * @returns PR_FALSE if the client is not attached to the queue.
+    */
+  PRBool IsAttached(PRUint32 aClientID);
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Variables
+
+  // storage
+  tmVector mTransactions;     // transactions that have been posted
+  tmVector mListeners;        // programs listening to this queue
+
+  // bookkeeping
+  PRUint32 mID;               // a number linked to the name in the mTM
+  char *mName;                // format: [namespace][domainname(ie prefs)]
+  tmTransactionManager *mTM;  // the container that holds the queue
+
+};
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmTransactionManager.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmTransactionManager.cpp
new file mode 100644
index 00000000..9d6cc98e
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmTransactionManager.cpp
@@ -0,0 +1,162 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "plstr.h"
+#include <stdlib.h>
+#include "tmQueue.h"
+#include "tmTransactionManager.h"
+#include "tmTransaction.h"
+#include "tmUtils.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// Constructors & Destructor & Initializer
+
+tmTransactionManager::~tmTransactionManager() {
+
+  PRUint32 size = mQueues.Size();
+  tmQueue *queue = nsnull;
+  for (PRUint32 index = 0; index < size; index++) {
+     queue = (tmQueue *)mQueues[index];
+     if (queue) {
+       delete queue;
+     }
+  }
+}
+
+PRInt32
+tmTransactionManager::Init() {
+  return mQueues.Init();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// public transaction module methods
+
+void
+tmTransactionManager::HandleTransaction(tmTransaction *aTrans) {
+
+  PRUint32 action = aTrans->GetAction();
+  PRUint32 ownerID = aTrans->GetOwnerID();
+  tmQueue *queue = nsnull;
+
+  // get the right queue -- attaches do it differently
+  if (action == TM_ATTACH) {
+    const char *name = (char*) aTrans->GetMessage(); // is qName for Attaches
+    queue = GetQueue(name);  
+    if (!queue) {
+      PRInt32 index = AddQueue(name);
+      if (index >= 0)
+        queue = GetQueue(index); // GetQueue may return nsnull
+    }
+  }
+  else  // all other trans should have a valid queue ID already
+    queue = GetQueue(aTrans->GetQueueID());
+
+  if (queue) {
+    // All possible actions should have a case, default is not valid
+    //   delete trans when done with them, let the queue own the trans
+    //   that are posted to them.
+    PRInt32 result = 0;
+    switch (action) {
+    case TM_ATTACH:
+      queue->AttachClient(ownerID);
+      break;
+    case TM_POST:
+      result = queue->PostTransaction(aTrans);
+      if (result >= 0) // post failed, aTrans cached in a tmQueue
+        return;
+      break;
+    case TM_FLUSH:
+      queue->FlushQueue(ownerID);
+      break;
+    case TM_DETACH:
+      if (queue->DetachClient(ownerID) == TM_SUCCESS_DELETE_QUEUE) {
+        // the last client has been removed, remove the queue
+        RemoveQueue(aTrans->GetQueueID()); // this _could_ be out of bounds
+      }
+      break;
+    default:
+      PR_NOT_REACHED("bad action in the transaction");
+    }
+  }
+  delete aTrans;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// Protected member functions
+
+//
+// Queue Handling
+//
+
+tmQueue*
+tmTransactionManager::GetQueue(const char *aQueueName) {
+
+  PRUint32 size = mQueues.Size();
+  tmQueue *queue = nsnull;
+  for (PRUint32 index = 0; index < size; index++) {
+    queue = (tmQueue*) mQueues[index];
+    if (queue && strcmp(queue->GetName(), aQueueName) == 0)
+      return queue;
+  }
+  return nsnull;
+}
+
+// if successful the nsresult contains the index of the added queue
+PRInt32
+tmTransactionManager::AddQueue(const char *aQueueName) {
+
+  tmQueue* queue = new tmQueue();
+  if (!queue)
+    return -1;
+  PRInt32 index = mQueues.Append(queue);
+  if (index < 0)
+    delete queue;
+  else
+    queue->Init(aQueueName, index, this);
+  return index;
+}
+
+void
+tmTransactionManager::RemoveQueue(PRUint32 aQueueID) {
+  PR_ASSERT(aQueueID <= mQueues.Size());
+
+  tmQueue *queue = (tmQueue*)mQueues[aQueueID];
+  if (queue) {
+    mQueues.RemoveAt(aQueueID);
+    delete queue;
+  }
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmTransactionManager.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmTransactionManager.h
new file mode 100644
index 00000000..a03ba528
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/module/tmTransactionManager.h
@@ -0,0 +1,147 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmTransactionManager_H_
+#define _tmTransactionManager_H_
+
+#include "plhash.h"
+#include "tmUtils.h"
+#include "tmVector.h"
+#include "tmIPCModule.h"
+
+// forward declarations
+class tmQueue;
+class tmClient;
+class tmTransaction;
+
+/**
+  * This class manages the flow of messages from the IPC daemon (coming to
+  *   it through the tmIPCModule) that ultimately come from a Transaction
+  *   Service (TS) in a mozilla based client somewhere. The message is
+  *   delivered to the proper queue, where it is dealt with.
+  *
+  * New queues get created here as clients request them.
+  */
+class tmTransactionManager
+{
+
+public:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Constructor(s) & Destructor & Initializer
+
+  /**
+    * reclaim the memory allcoated during initialization
+    */
+  virtual ~tmTransactionManager();
+
+  /**
+    * Set up the storage of the queues - initialize the vector
+    *
+    * @returns NS_OK if successful
+    * @returns -1 if initialization fails
+    */
+  PRInt32 Init();
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Public Member Functions
+
+  /**
+    * Called from the tmIPCModule. Decide where to send the message and
+    *   dispatch it. 
+    */
+  void HandleTransaction(tmTransaction *aTrans);
+
+  /**
+    * Called by the queues when they need to get a message back out to a 
+    *   client.
+    */
+  void SendTransaction(PRUint32 aDestClientIPCID, tmTransaction *aTrans) {
+    PR_ASSERT(aTrans);
+    tmIPCModule::SendMsg(aDestClientIPCID, aTrans);
+  }
+
+protected:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Functions
+
+  // Queue management
+
+  /**
+    * @returns the queue indexed by the ID passed in, which could be nsnull
+    */
+  tmQueue* GetQueue(PRUint32 aQueueID) {
+    return (tmQueue*) mQueues[aQueueID];
+  }
+
+  /**
+    * @returns the queue with the name passed in
+    * @returns nsnull if there is no queue with that name
+    */
+  tmQueue* GetQueue(const char *aQueueName);
+
+  /**
+    * If all is successful a new queue with the name provided will be created,
+    *   and added to the collection of queues. It will be initialized and ready
+    *   to have transactions added.
+    *
+    * This doesn't check for the existance of a queue with this name. IF
+    *   there is already a queue with this name then you will
+    *   get that when using GetQueue(qName) and never get the new queue
+    *   created here. A call to GetQueue(qID) will be able to get at the new
+    *   queue, however you had better cache the ID.
+    *
+    * @returns -1 if the queue can't be created, or is not added
+    * @returns >= 0 if the queue was added successfully
+    */
+  PRInt32 AddQueue(const char *aQueueType);
+
+  /**
+    */
+  void RemoveQueue(PRUint32 aQueueID);
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Variables
+
+  tmVector mQueues;
+
+private:
+
+};
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/Makefile.in
new file mode 100644
index 00000000..65b126e9
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/Makefile.in
@@ -0,0 +1,53 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH = ../../../../..
+topsrcdir = @top_srcdir@
+srcdir = @srcdir@
+VPATH = @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = ipcd
+XPIDL_MODULE = ipcd_transmngr
+
+XPIDLSRCS = \
+  ipcITransactionService.idl \
+  ipcITransactionObserver.idl \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/ipcITransactionObserver.idl b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/ipcITransactionObserver.idl
new file mode 100644
index 00000000..c7df965d
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/ipcITransactionObserver.idl
@@ -0,0 +1,100 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsISupports.idl"
+
+[scriptable, uuid(656c0a6a-5cb3-45ec-8cb6-e7678897f937)]
+interface ipcITransactionObserver : nsISupports
+{
+  /**
+    * This gets called when a Transaction has been sent from the 
+    *   TransactionManager. If the data passed in needs to be stored
+    *   for longer than the life of the method the observer needs
+    *   to make a copy.
+    *
+    * @param aQueueID
+    *        The queue from which the transaction originated
+    *
+    * @param aData
+    *        The data to be sent.
+    *
+    * @param aDataLen
+    *        The length of the data argument
+    */
+  void onTransactionAvailable(in unsigned long aQueueID,
+                              [array, const, size_is(aDataLen)]
+                              in octet aData,
+                              in unsigned long aDataLen);
+
+  /**
+    * Called after an application sends an Attach message to the
+    *   Transaction Manager.
+    *
+    * @param aQueueID
+    *        The client has been attached to the queue with this ID
+    *
+    * @param aStatus
+    *        The status of the operation, as defined in tmUtils.h
+    */
+  void onAttachReply(in unsigned long aQueueID, in unsigned long aStatus);
+
+  /**
+    * Called after an application sends a Detach message. Indicates 
+    *   to the client that no more messages will be coming from the
+    *   the TM to this client. Also, no messages posted from this
+    *   client to the indicated queue will be accepted.
+    *
+    * @param aQueueID
+    *        The client has been detached from the queue with this ID
+    *
+    * @param aStatus
+    *        The status of the operation, as defined in tmUtils.h
+    */
+  void onDetachReply(in unsigned long aQueueID, in unsigned long aStatus);
+
+  /**
+    * The reply from the TM indicating all messages have been removed
+    *   from the queue indicated.
+    *
+    * @param aQueueID
+    *        The queue that has been flushed.
+    *
+    * @param aStatus
+    *        The status of the operation, as defined in tmUtils.h
+    */
+  void onFlushReply(in unsigned long aQueueID, in unsigned long aStatus);
+};
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/ipcITransactionService.idl b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/ipcITransactionService.idl
new file mode 100644
index 00000000..0bcbc453
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/public/ipcITransactionService.idl
@@ -0,0 +1,239 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// from tmTransactionManager.h
+//
+// XXX documentation needs work
+//////////////////////////////////////////////////////////////////////////////
+//  Overview of TransactionManager IPC Module
+//
+// Classes:
+//    tmIPCModule - From the tmTransactionManager's point of view, this
+//        is a proxy for the IPC daemon itself. The reverse is true
+//        from the daemon's point of view. This is an interface for the
+//        Transaction system to work with the IPC daemon as its transport
+//        layer.
+//    tmTransactionManager (TM) - Manages the different queues. Maintains
+//        the queues neccessary for different clients. Receives messages
+//        from the tmIPCModule and passes message to the IPC daemon through
+//        the tmIPCModule.
+//    tmQueue - this class manages the transactions for the different areas
+//        of the profiles being shared. Broken down by functional area there
+//        will be  a queue for prefs, cookies etc, but not for profileA and 
+//        profileB, and not for pref_delete, pref_create, pref_change etc...
+//    tmTransaction - the actual transaction being shared with the different
+//        tmClients. It contains the type of transaction, which will equate with
+//        a type of queue in existance, the owner of the transaction (an IPC daemon ID)
+//        and the actual text message to be shared. 
+//
+//////////////////////////////////////////////////////////////////////////////
+
+/// XXX some docs that need to be put somewhere:
+//
+// from tmqueue.cpp
+// Docs - note that the status of the TM_ATTACH_REPLY is only for checking
+//            for TM_ERROR_FAILURE. Other numbers have no importance
+// success of the status means the NS_ERROR_GET_CODE(status) will 
+//     yield the index of the listener.
+//
+// move to documentation page - from tmqueue.h
+//
+// a queue is specific to profile
+//
+// UUID going out from the module is a handler in the client 
+//          (will go to the XPCOM service impling that UUID)
+//   -- does it make sense to have different UUIDs for cookies/prefs/etc
+//
+
+#include "nsISupports.idl"
+
+interface ipcITransactionObserver;
+
+[scriptable, uuid(15561efb-8c58-4a47-813a-fa91cf730895)]
+interface ipcITransactionService : nsISupports
+{
+  /** 
+    * Connects the application to the transaction manager, defines the
+    *   namespace and initializes internal storage
+    *
+    * @param aNamespace
+    *        A string defining the scope of the transaction domains. It is
+    *        used internally to seperate process listening to the same domain
+    *        (ie. preferences) but for two different namespaces (ie. profile1 vs
+    *        profile2).
+    *
+    * @returns NS_OK if all memory allocated properly and the IPC service was
+    *          reached and attached to successfully.
+    *
+    * @returns an NS_ERROR_<foo> code specific to the failure otherwise
+    */
+  void init(in ACString aNamespace);
+
+  /** 
+    * Links the observer passed in with the domain specified. This will allow
+    *   the observer to post transactions dealing with this domain as well as
+    *   receive transactions posted by other applications observing this
+    *   domain.
+    *
+    * Return codes for this method confer information about the success of
+    *   this call, not of the actual attaching of the observer to the domain.
+    *   (except the TM_ERROR code - which means the observer can not attach)
+    *   If the attach is successful the observer will have its OnAttachReply
+    *   method called before this method returns.
+    *
+    * Note: This call is synchronous and will not return until the call to
+    *       OnAttachReply is made.
+    * 
+    * @param aDomainName
+    *        the name of the domain, in the current namespace, to listen for
+    *        transactions from. i.e. cookies
+    *
+    * @param aObserver
+    *        this will be used to notify the application when transactions
+    *        and messages come in.
+    *
+    * @param aLockingCall
+    *        Have the Transaction Sevice acquire a lock based on the domain
+    *        before attaching. This should be used when persistant storage
+    *        is being used to prevent data corruption.
+    *
+    * @returns NS_OK if the attach message was sent to the Transaction Manager.
+    *
+    * @returns an NS_ERROR_<foo> code specific to the failure otherwise
+    *
+    * @returns TM_ERROR_QUEUE_EXISTS if the queue already exists which means
+    *          someone has already attached to it.
+    */
+  void attach(in ACString aDomainName, 
+              in ipcITransactionObserver aObserver, 
+              in PRBool aLockingCall);
+
+  /**
+    * Sends a detach message to the Transaction Manager to unlink the observer
+    *   associated with the domain passed in. 
+    *
+    * As in attach, return codes do not indicate success of detachment. The
+    *   observer will have it's OnDetach method called if it is successfully
+    *   detached.
+    *
+    * Note: This call is an asynchronous call.
+    *
+    * @param aDomainName
+    *        the domain, in the current namespace, from which the client
+    *        should be removed.
+    *
+    * @returns NS_OK if the detach message is sent to the Transaction Manager
+    *
+    * @returns NS_ERROR_FAILURE is something goes wrong
+    *
+    * @returns NS_ERRROR_UNEXPECTD if the domain does not have an observer 
+    *          attached
+    */
+  void detach(in ACString aDomainName);
+
+  /**
+    * Sends a flush message to the Transaction Manager to remove all
+    *   transactions for the domain. After this call there will be no
+    *   transactions in the Transaction Manager for the namespace/domain
+    *   pairing. It is up to the application to coordinate the flushing
+    *   of the Transaction Manager with the writing of data to files,
+    *   if needed.
+    *
+    * Note: This call is synchronous and will not return until the call to
+    *       OnFlushReply is made.
+    *
+    * @param aDomainName
+    *        The domain, in the current namespace, to flush.
+    *
+    * @param aLockingCall
+    *        Have the Transaction Sevice acquire a lock based on the domain
+    *        before flushing. This should be used when persistant storage
+    *        is being used to prevent data corruption.
+    *
+    * @returns NS_OK if the flush message is sent to the Transaction Manager
+    *
+    * @returns NS_ERROR_FAILURE is something goes wrong
+    *
+    * @returns NS_ERRROR_UNEXPECTD if the domain does not have an observer 
+    *          attached
+    */
+  void flush(in ACString aDomainName, in PRBool aLockingCall);
+
+  /**
+    * Send the data to the Transaction Manager to be broadcast to any
+    *   applications that have registered as observers of this particular
+    *   namespace/domain pairing.
+    *
+    * If this domain is not being observed (attach has not been called for
+    *   this domain) the message is queued until the attach is made and then
+    *   the message is sent to the Transaction Manager with the proper domain
+    *   information. 
+    *
+    *   XXXjg - this may not be neccessary with the synch attach call.
+    *
+    * Note: This call is an asynchronous call.
+    *
+    * @param aDomainName
+    *        the domain, in the current namespace, to which the data will be
+    *        sent.
+    *
+    * @param aData
+    *        The actual data to be sent.
+    *
+    * @param aDataLen
+    *        The length of the data argument
+    */
+  void postTransaction(in ACString aDomainName, 
+                       [array, const, size_is(aDataLen)]
+                       in octet aData,
+                       in unsigned long aDataLen);
+};
+
+%{C++
+// singleton implementing ipcITransactionService
+#define IPC_TRANSACTIONSERVICE_CLASSNAME \
+    "tmTransactionService"
+#define IPC_TRANSACTIONSERVICE_CONTRACTID \
+    "@mozilla.org/ipc/transaction-service;1"
+#define IPC_TRANSACTIONSERVICE_CID \
+{ /* 1403adf4-94d1-4c67-a8ae-d9f86972d378 */         \
+  0x1403adf4,                                        \
+  0x94d1,                                            \
+  0x4c67,                                            \
+  {0xa8, 0xae, 0xd9, 0xf8, 0x69, 0x72, 0xd3, 0x78}   \
+}
+%}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/.cvsignore
new file mode 100644
index 00000000..7726b497
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/.cvsignore
@@ -0,0 +1,4 @@
+Makefile
+tmTransactionService.obj
+transmgr_s.lib
+transmgr_s.pdb
\ No newline at end of file
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/Makefile.in
new file mode 100644
index 00000000..6510e489
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/Makefile.in
@@ -0,0 +1,64 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH = ../../../../..
+topsrcdir = @top_srcdir@
+srcdir = @srcdir@
+VPATH = @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = ipcd
+LIBRARY_NAME = transmgr_s
+FORCE_STATIC_LIB = 1
+MODULE_NAME = ipcd
+
+REQUIRES	= string \
+		  xpcom \
+		  $(NULL)
+
+CPPSRCS = \
+  tmTransactionService.cpp \
+  $(NULL)
+
+include $(topsrcdir)/config/config.mk
+
+LOCAL_INCLUDES = \
+  -I$(srcdir)/../common \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/tmTransactionService.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/tmTransactionService.cpp
new file mode 100644
index 00000000..e53d6aa7
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/tmTransactionService.cpp
@@ -0,0 +1,504 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "nsCOMPtr.h"
+#include "nsIServiceManager.h"
+#include "nsReadableUtils.h"
+#include "plstr.h"
+#include "ipcITransactionObserver.h"
+#include "tmTransaction.h"
+#include "tmTransactionService.h"
+#include "tmUtils.h"
+
+static const nsID kTransModuleID = TRANSACTION_MODULE_ID;
+
+struct tm_waiting_msg {
+  tmTransaction trans;      // a transaction waiting to be sent to a queue
+  char*         domainName; // the short queue name
+
+  ~tm_waiting_msg();
+};
+
+tm_waiting_msg::~tm_waiting_msg() {
+  if (domainName)
+    PL_strfree(domainName);
+}
+
+struct tm_queue_mapping {
+  PRInt32 queueID;          // the ID in the TM
+  char*   domainName;       // used by the consumers of this service
+  char*   joinedQueueName;  // used by the service -- namespace + domain name
+
+  ~tm_queue_mapping();
+};
+
+tm_queue_mapping::~tm_queue_mapping() {
+  if (domainName)
+    PL_strfree(domainName);
+  if (joinedQueueName)
+    PL_strfree(joinedQueueName);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// Constructor and Destructor
+
+tmTransactionService::~tmTransactionService() {
+
+  // just destroy this, it contains 2 pointers it doesn't own.
+  if (mObservers)
+    PL_HashTableDestroy(mObservers);
+
+  PRUint32 index = 0;
+  PRUint32 size = mWaitingMessages.Size();
+  tm_waiting_msg *msg = nsnull;
+  for ( ; index < size; index ++) {
+    msg = (tm_waiting_msg*) mWaitingMessages[index];
+    delete msg;
+  }
+
+  size = mQueueMaps.Size();
+  tm_queue_mapping *qmap = nsnull;
+  for (index = 0; index < size; index++) {
+    qmap = (tm_queue_mapping*) mQueueMaps[index];
+    if (qmap)
+      delete qmap;
+  }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// ISupports
+
+NS_IMPL_ISUPPORTS2(tmTransactionService,
+                   ipcITransactionService,
+                   ipcIMessageObserver)
+
+//////////////////////////////////////////////////////////////////////////////
+// ipcITransactionService
+
+NS_IMETHODIMP
+tmTransactionService::Init(const nsACString & aNamespace) {
+
+  nsresult rv;
+  
+  rv = IPC_DefineTarget(kTransModuleID, this, PR_TRUE);
+  if (NS_FAILED(rv))
+    return rv;
+
+  // get the lock service
+  lockService = do_GetService("@mozilla.org/ipc/lock-service;1");
+  if (!lockService)
+    return NS_ERROR_FAILURE;
+
+  // create some internal storage
+  mObservers = PL_NewHashTable(20, 
+                               PL_HashString, 
+                               PL_CompareStrings, 
+                               PL_CompareValues, 0, 0);
+  if (!mObservers)
+    return NS_ERROR_FAILURE;
+
+  // init some internal storage
+  mQueueMaps.Init();
+  mWaitingMessages.Init();
+
+  // store the namespace
+  mNamespace.Assign(aNamespace);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+tmTransactionService::Attach(const nsACString & aDomainName, 
+                             ipcITransactionObserver *aObserver,
+                             PRBool aLockingCall) {
+
+  // if the queue already exists, then someone else is attached to it. must
+  //   return an error here. Only one module attached to a queue per app.
+  if (GetQueueID(aDomainName) != TM_NO_ID)
+    return TM_ERROR_QUEUE_EXISTS;
+
+  // create the full queue name: namespace + queue
+  nsCString jQName;
+  jQName.Assign(mNamespace);
+  jQName.Append(aDomainName);
+
+  // this char* has two homes, make sure it gets PL_free()ed properly
+  char* joinedQueueName = ToNewCString(jQName);
+  if (!joinedQueueName)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  // link the observer to the joinedqueuename.  home #1 for joinedQueueName
+  // these currently don't get removed until the destructor on this is called.
+  PL_HashTableAdd(mObservers, joinedQueueName, aObserver);
+
+  // store the domainName and JoinedQueueName, create a place to store the ID
+  tm_queue_mapping *qm = new tm_queue_mapping();
+  if (!qm)
+    return NS_ERROR_OUT_OF_MEMORY;
+  qm->queueID = TM_NO_ID;                   // initially no ID for the queue
+  qm->joinedQueueName = joinedQueueName;    // home #2, owner of joinedQueueName
+  qm->domainName = ToNewCString(aDomainName);
+  if (!qm->domainName) {
+    PL_HashTableRemove(mObservers, joinedQueueName);
+    delete qm;
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  mQueueMaps.Append(qm);
+
+  nsresult rv = NS_ERROR_FAILURE;
+  tmTransaction trans;
+
+  // acquire a lock if neccessary
+  if (aLockingCall)
+    lockService->AcquireLock(joinedQueueName, PR_TRUE);
+  // XXX need to handle lock failures
+
+  if (NS_SUCCEEDED(trans.Init(0,                             // no IPC client
+                              TM_NO_ID,                      // qID gets returned to us
+                              TM_ATTACH,                     // action
+                              NS_OK,                         // default status
+                              (PRUint8 *)joinedQueueName,    // qName gets copied
+                              PL_strlen(joinedQueueName)+1))) { // message length
+    // send the attach msg
+    SendMessage(&trans, PR_TRUE);  // synchronous
+    rv = NS_OK;
+  }
+
+  // drop the lock if neccessary
+  if (aLockingCall)
+    lockService->ReleaseLock(joinedQueueName);
+
+  return rv;
+}
+
+// actual removal of the observer takes place when we get the detach reply
+NS_IMETHODIMP
+tmTransactionService::Detach(const nsACString & aDomainName) {
+
+  // asynchronous detach
+  return SendDetachOrFlush(GetQueueID(aDomainName), TM_DETACH, PR_FALSE);
+
+}
+
+NS_IMETHODIMP
+tmTransactionService::Flush(const nsACString & aDomainName,
+                            PRBool aLockingCall) {
+  // acquire a lock if neccessary
+  if (aLockingCall)
+    lockService->AcquireLock(GetJoinedQueueName(aDomainName), PR_TRUE);
+
+  // synchronous flush
+  nsresult rv = SendDetachOrFlush(GetQueueID(aDomainName), TM_FLUSH, PR_TRUE);
+
+  // drop the lock if neccessary
+  if (aLockingCall)
+    lockService->ReleaseLock(GetJoinedQueueName(aDomainName));
+
+  return rv;
+
+}
+
+NS_IMETHODIMP
+tmTransactionService::PostTransaction(const nsACString & aDomainName, 
+                                      const PRUint8 *aData, 
+                                      PRUint32 aDataLen) {
+
+  tmTransaction trans;
+  if (NS_SUCCEEDED(trans.Init(0,                       // no IPC client
+                              GetQueueID(aDomainName), // qID returned to us
+                              TM_POST,                 // action
+                              NS_OK,                   // default status
+                              aData,                   // message data
+                              aDataLen))) {             // message length
+    if (trans.GetQueueID() == TM_NO_ID) {
+      // stack it and pack it
+      tm_waiting_msg *msg = new tm_waiting_msg(); 
+      if (!msg)
+        return NS_ERROR_OUT_OF_MEMORY;
+      msg->trans = trans;
+      msg->domainName = ToNewCString(aDomainName);
+      if (!msg->domainName) {
+        delete msg;
+        return NS_ERROR_OUT_OF_MEMORY;
+      }
+      mWaitingMessages.Append(msg);
+    }
+    else {
+      // send it
+      SendMessage(&trans, PR_FALSE);
+    }
+    return NS_OK;
+  }
+  return NS_ERROR_FAILURE;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// ipcIMessageObserver
+
+NS_IMETHODIMP
+tmTransactionService::OnMessageAvailable(const PRUint32 aSenderID,
+                                         const nsID & aTarget, 
+                                         const PRUint8 *aData, 
+                                         PRUint32 aDataLength) {
+
+  nsresult rv = NS_ERROR_OUT_OF_MEMORY; // prime the return value
+
+  tmTransaction *trans = new tmTransaction();
+  if (trans) {
+    rv = trans->Init(0,                      // no IPC client ID
+                     TM_INVALID_ID,          // in aData
+                     TM_INVALID_ID,          // in aData
+                     TM_INVALID_ID,          // in aData
+                     aData,                  // message data
+                     aDataLength);           // message length
+
+    if (NS_SUCCEEDED(rv)) {
+      switch(trans->GetAction()) {
+      case TM_ATTACH_REPLY:
+        OnAttachReply(trans);
+        break;
+      case TM_POST_REPLY:
+        // OnPostReply() would be called here
+        //   isn't neccessary at the current time 2/19/03
+        break;
+      case TM_DETACH_REPLY:
+        OnDetachReply(trans);
+        break;
+      case TM_FLUSH_REPLY:
+        OnFlushReply(trans);
+        break;
+      case TM_POST:
+        OnPost(trans);
+        break;
+      default: // error, should not happen
+        NS_NOTREACHED("Recieved a TM reply outside of mapped messages");
+        break;
+      }
+    }
+    delete trans;
+  }
+  return rv;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// Protected Member Functions
+
+void
+tmTransactionService::SendMessage(tmTransaction *aTrans, PRBool aSync) {
+
+  NS_ASSERTION(aTrans, "tmTransactionService::SendMessage called with null transaction");
+
+  IPC_SendMessage(0, kTransModuleID, 
+                  aTrans->GetRawMessage(), 
+                  aTrans->GetRawMessageLength());
+  if (aSync)
+    IPC_WaitMessage(0, kTransModuleID, nsnull, nsnull, PR_INTERVAL_NO_TIMEOUT);
+}
+
+void
+tmTransactionService::OnAttachReply(tmTransaction *aTrans) {
+
+  // if we attached, store the queue's ID
+  if (aTrans->GetStatus() >= 0) {
+
+    PRUint32 size = mQueueMaps.Size();
+    tm_queue_mapping *qmap = nsnull;
+    for (PRUint32 index = 0; index < size; index++) {
+      qmap = (tm_queue_mapping*) mQueueMaps[index];
+      if (qmap && 
+          PL_strcmp(qmap->joinedQueueName, (char*) aTrans->GetMessage()) == 0) {
+
+        // set the ID in the mapping
+        qmap->queueID = aTrans->GetQueueID();
+        // send any stored messges to the queue
+        DispatchStoredMessages(qmap);
+      }
+    }
+  }
+
+  // notify the observer we have attached (or didn't)
+  ipcITransactionObserver *observer = 
+    (ipcITransactionObserver *)PL_HashTableLookup(mObservers, 
+                                                 (char*)aTrans->GetMessage());
+  if (observer)
+    observer->OnAttachReply(aTrans->GetQueueID(), aTrans->GetStatus());
+}
+
+void
+tmTransactionService::OnDetachReply(tmTransaction *aTrans) {
+
+  tm_queue_mapping *qmap = GetQueueMap(aTrans->GetQueueID());
+
+  // get the observer before we release the hashtable entry
+  ipcITransactionObserver *observer = 
+    (ipcITransactionObserver *)PL_HashTableLookup(mObservers, 
+                                                 qmap->joinedQueueName);
+
+  // if it was removed, clean up
+  if (aTrans->GetStatus() >= 0) {
+
+    // remove the link between observer and queue
+    PL_HashTableRemove(mObservers, qmap->joinedQueueName);
+
+    // remove the mapping of queue names and id
+    mQueueMaps.Remove(qmap);
+    delete qmap;
+  }
+
+
+  // notify the observer -- could be didn't detach
+  if (observer)
+    observer->OnDetachReply(aTrans->GetQueueID(), aTrans->GetStatus());
+}
+
+void
+tmTransactionService::OnFlushReply(tmTransaction *aTrans) {
+
+  ipcITransactionObserver *observer = 
+    (ipcITransactionObserver *)PL_HashTableLookup(mObservers, 
+                              GetJoinedQueueName(aTrans->GetQueueID()));
+  if (observer)
+    observer->OnFlushReply(aTrans->GetQueueID(), aTrans->GetStatus());
+}
+
+void
+tmTransactionService::OnPost(tmTransaction *aTrans) {
+
+  ipcITransactionObserver *observer = 
+    (ipcITransactionObserver*) PL_HashTableLookup(mObservers, 
+                              GetJoinedQueueName(aTrans->GetQueueID()));
+  if (observer)
+    observer->OnTransactionAvailable(aTrans->GetQueueID(), 
+                                     aTrans->GetMessage(), 
+                                     aTrans->GetMessageLength());
+}
+
+void
+tmTransactionService::DispatchStoredMessages(tm_queue_mapping *aQMapping) {
+
+  PRUint32 size = mWaitingMessages.Size();
+  tm_waiting_msg *msg = nsnull;
+  for (PRUint32 index = 0; index < size; index ++) {
+    msg = (tm_waiting_msg*) mWaitingMessages[index];
+    // if the message is waiting on the queue passed in
+    if (msg && strcmp(aQMapping->domainName, msg->domainName) == 0) {
+
+      // found a match, send it and remove
+      msg->trans.SetQueueID(aQMapping->queueID);
+      SendMessage(&(msg->trans), PR_FALSE);
+
+      // clean up
+      mWaitingMessages.Remove(msg);
+      delete msg;
+    }
+  }
+}
+
+// searches against the short queue name
+PRInt32
+tmTransactionService::GetQueueID(const nsACString & aDomainName) {
+
+  PRUint32 size = mQueueMaps.Size();
+  tm_queue_mapping *qmap = nsnull;
+  for (PRUint32 index = 0; index < size; index++) {
+    qmap = (tm_queue_mapping*) mQueueMaps[index];
+    if (qmap && aDomainName.Equals(qmap->domainName))
+      return qmap->queueID;
+  }
+  return TM_NO_ID;
+}
+
+char*
+tmTransactionService::GetJoinedQueueName(PRUint32 aQueueID) {
+
+  PRUint32 size = mQueueMaps.Size();
+  tm_queue_mapping *qmap = nsnull;
+  for (PRUint32 index = 0; index < size; index++) {
+    qmap = (tm_queue_mapping*) mQueueMaps[index];
+    if (qmap && qmap->queueID == aQueueID)
+      return qmap->joinedQueueName;
+  }
+  return nsnull;
+}
+
+char*
+tmTransactionService::GetJoinedQueueName(const nsACString & aDomainName) {
+
+  PRUint32 size = mQueueMaps.Size();
+  tm_queue_mapping *qmap = nsnull;
+  for (PRUint32 index = 0; index < size; index++) {
+    qmap = (tm_queue_mapping*) mQueueMaps[index];
+    if (qmap && aDomainName.Equals(qmap->domainName))
+      return qmap->joinedQueueName;
+  }
+  return nsnull;
+}
+
+tm_queue_mapping*
+tmTransactionService::GetQueueMap(PRUint32 aQueueID) {
+
+  PRUint32 size = mQueueMaps.Size();
+  tm_queue_mapping *qmap = nsnull;
+  for (PRUint32 index = 0; index < size; index++) {
+    qmap = (tm_queue_mapping*) mQueueMaps[index];
+    if (qmap && qmap->queueID == aQueueID)
+      return qmap;
+  }
+  return nsnull;
+}
+
+nsresult
+tmTransactionService::SendDetachOrFlush(PRUint32 aQueueID,
+                                        PRUint32 aAction, 
+                                        PRBool aSync) {
+
+  // if the queue isn't attached to, just return
+  if (aQueueID == TM_NO_ID)
+    return NS_ERROR_UNEXPECTED;
+
+  tmTransaction trans;
+  if (NS_SUCCEEDED(trans.Init(0,         // no IPC client
+                              aQueueID,  // qID to detach from
+                              aAction,   // action
+                              NS_OK,     // default status
+                              nsnull,    // no message
+                              0))) {      // no message
+    // send it
+    SendMessage(&trans, aSync);
+    return NS_OK;
+  }
+  return NS_ERROR_FAILURE;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/tmTransactionService.h b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/tmTransactionService.h
new file mode 100644
index 00000000..cd9310fe
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/src/tmTransactionService.h
@@ -0,0 +1,196 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef _tmTransactionService_H_
+#define _tmTransactionService_H_
+
+#include "ipcdclient.h"
+#include "ipcILockService.h"
+#include "ipcIMessageObserver.h"
+#include "ipcITransactionService.h"
+#include "nsString.h"
+#include "nsVoidArray.h"
+#include "plhash.h"
+#include "tmTransaction.h"
+#include "tmVector.h"
+
+struct tm_queue_mapping;
+
+/**
+  * The tmTransactionService shares packets of information
+  *   (transactions) with other Gecko based applications interested in the same
+  *   namespace and domain. An application registers with the Transaction Service
+  *   for a particular namespace and domain and then can post transactions to the
+  *   service and receive transactions from the service. 
+  *
+  * For applications using the Transaction Service to share changes in state that
+  *   get reflected in files on disk there are certain pattersn to follow to ensure
+  *   data loss does not occur. 
+  *
+  *   Startup: XXX docs needed
+  *
+  *   Shutdown/writing to disk: XXX docs needed
+  *
+  *
+  */
+class tmTransactionService : public ipcITransactionService,
+                             public ipcIMessageObserver
+{
+
+public:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Constructor & Destructor
+  tmTransactionService() : mObservers(0) {};
+
+  /**
+    * Reclaim all the memory allocated: PL_hashtable, tmVectors
+    */
+  virtual ~tmTransactionService();
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Interface Declarations
+
+  // for API docs, see the respective *.idl files
+  NS_DECL_ISUPPORTS
+  NS_DECL_IPCITRANSACTIONSERVICE
+  NS_DECL_IPCIMESSAGEOBSERVER
+
+protected:
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Functions
+
+  /**
+    * Pulls the raw message out of the transaction and sends it to the IPC
+    *   service to be delivered to the TM.
+    *
+    * @param aTrans
+    *        The transaction to send to the TM
+    *
+    * @param aSync 
+    *        If TRUE, calling thread will be blocked until a reply is
+    *        received.
+    */
+  void SendMessage(tmTransaction *aTrans, PRBool aSync);
+
+  // handlers for reply messages from TransactionManager
+
+  /**
+    * Pulls the queueID out of the ATTACH_REPLY message and stores it in the
+    *   proper tm_queue_mapping object. Calls DispatchStoredMessages() to make
+    *   sure we send any messages that have been waiting on the ATTACH_REPLY.
+    *   Also calls the OnAttachReply() method for the observer of the queue.
+    */
+  void OnAttachReply(tmTransaction *aTrans);
+
+  /**
+    * Removes the tm_queue_mapping object and calls the OnDetachReply() method
+    *   on the observer of the queue detached.
+    */
+  void OnDetachReply(tmTransaction *aTrans);
+
+  /**
+    * Calls the OnFlushReply method of the observer of the queue.
+    */
+  void OnFlushReply(tmTransaction *aTrans);
+
+  /**
+    * Calls the OnPost method of the observer of the queue.
+    */
+  void OnPost(tmTransaction *aTrans);
+
+  // other helper functions
+
+  /**
+    * Cycle through the collection of transactions waiting to go out and
+    *   send any that are waiting on an ATTACH_REPLY from the queue
+    *   specified by the tm_queue_mapping passed in.
+    */
+  void DispatchStoredMessages(tm_queue_mapping *aQMapping);
+
+  // helper methods for accessing the void arrays
+
+  /**
+    * @returns the ID corresponding to the domain name passed in
+    * @returns TM_NO_ID if the name is not found.
+    */
+  PRInt32 GetQueueID(const nsACString & aDomainName);
+
+  /**
+    * @returns the joined queue name - namespace + domain 
+    *          (prefs, cookies etc) corresponding to the ID passed in.
+    * @returns nsnull if the ID is not found.
+    */
+  char* GetJoinedQueueName(PRUint32 aQueueID);
+
+  /**
+    * @returns the joined queue name - namespace + domain 
+    *          (prefs, cookies etc) corresponding to the ID passed in.
+    * @returns nsnull if the ID is not found.
+    */
+  char* GetJoinedQueueName(const nsACString & aDomainName);
+
+  /**
+    * @returns the tm_queue_mapping object that contains the ID passed in.
+    * @returns nsnull if the ID is not found.
+    */
+  tm_queue_mapping* GetQueueMap(PRUint32 aQueueID);
+
+  /**
+    * Helper method for Detach and Flush requests.
+    */
+  nsresult SendDetachOrFlush(PRUint32 aQueueID,
+                             PRUint32 aAction,
+                             PRBool aSync);
+
+  ////////////////////////////////////////////////////////////////////////////
+  // Protected Member Variables
+
+  nsCString mNamespace;               // limit domains to the namespace
+  PLHashTable *mObservers;            // maps qName -> ipcITransactionObserver
+
+  tmVector mQueueMaps;                // queue - name - domain mappings
+  tmVector mWaitingMessages;          // messages sent before ATTACH_REPLY
+
+  nsCOMPtr<ipcILockService> lockService;  // cache the lock service
+
+private:
+
+};
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/.cvsignore
new file mode 100644
index 00000000..e3c610be
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/.cvsignore
@@ -0,0 +1,6 @@
+Makefile
+tmModuleTest.exe
+tmModuleTest.ilk
+tmModuleTest.pdb
+tmModuleTest.obj
+tmModuleTest
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/Makefile.in
new file mode 100644
index 00000000..385751a3
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/Makefile.in
@@ -0,0 +1,68 @@
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla Transaction Manager.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corp.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   John Gaunt <jgaunt@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE = tm_test
+
+REQUIRES	= ipcd \
+		  nspr \
+		  string \
+		  xpcom \
+		  $(NULL)
+
+CPPSRCS = \
+  tmModuleTest.cpp \
+  $(NULL)
+
+SIMPLE_PROGRAMS	= $(CPPSRCS:.cpp=$(BIN_SUFFIX))
+
+include $(topsrcdir)/config/config.mk
+
+LIBS = \
+  $(EXTRA_DSO_LIBS) \
+  $(XPCOM_LIBS) \
+  $(NSPR_LIBS) \
+  $(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
diff --git a/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/tmModuleTest.cpp b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/tmModuleTest.cpp
new file mode 100644
index 00000000..5d1dccd4
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/extensions/transmngr/test/tmModuleTest.cpp
@@ -0,0 +1,323 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Transaction Manager.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corp.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   John Gaunt <jgaunt@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// transaction manager includes
+#include "ipcITransactionService.h"
+#include "ipcITransactionObserver.h"
+
+// ipc daemon includes
+#include "ipcIService.h"
+
+// core & xpcom ns includes
+#include "nsDebug.h"
+#include "nsIEventQueueService.h"
+#include "nsIServiceManager.h"
+#include "nsIComponentRegistrar.h"
+#include "nsString.h"
+
+// nspr includes
+#include "prmem.h"
+#include "plgetopt.h"
+#include "nspr.h"
+#include "prlog.h"
+
+//////////////////////////////////////////////////////////////////////////////
+// Testing/Debug/Logging BEGIN
+
+const int NameSize = 1024;
+
+/* command line options */
+PRIntn      optDebug = 0;
+char        optMode = 's';
+char        *profileName = new char[NameSize];
+char        *queueName = new char[NameSize];
+
+char        *data = new char[NameSize];
+PRUint32    dataLen = 10;         // includes the null terminator for "test data"
+
+// Testing/Debug/Logging END
+//////////////////////////////////////////////////////////////////////////////
+
+#define RETURN_IF_FAILED(rv, step) \
+    PR_BEGIN_MACRO \
+    if (NS_FAILED(rv)) { \
+        printf("*** %s failed: rv=%x\n", step, rv); \
+        return rv;\
+    } \
+    PR_END_MACRO
+
+static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
+static nsIEventQueue* gEventQ = nsnull;
+static PRBool gKeepRunning = PR_TRUE;
+//static PRInt32 gMsgCount = 0;
+static ipcIService *gIpcServ = nsnull;
+static ipcITransactionService *gTransServ = nsnull;
+
+//-----------------------------------------------------------------------------
+
+class myTransactionObserver : public ipcITransactionObserver
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_IPCITRANSACTIONOBSERVER
+
+    myTransactionObserver() { }
+};
+
+NS_IMPL_ISUPPORTS1(myTransactionObserver, ipcITransactionObserver)
+
+NS_IMETHODIMP myTransactionObserver::OnTransactionAvailable(PRUint32 aQueueID, const PRUint8 *aData, PRUint32 aDataLen)
+{
+    printf("tmModuleTest: myTransactionObserver::OnTransactionAvailable [%s]\n", aData);
+    return NS_OK;
+}
+
+NS_IMETHODIMP myTransactionObserver::OnAttachReply(PRUint32 aQueueID, PRUint32 aStatus)
+{
+    printf("tmModuleTest: myTransactionObserver::OnAttachReply [%d]\n", aStatus);
+    return NS_OK;
+}
+
+NS_IMETHODIMP myTransactionObserver::OnDetachReply(PRUint32 aQueueID, PRUint32 aStatus)
+{
+    printf("tmModuleTest: myTransactionObserver::OnDetachReply [%d]\n", aStatus);
+    return NS_OK;
+}
+
+NS_IMETHODIMP myTransactionObserver::OnFlushReply(PRUint32 aQueueID, PRUint32 aStatus)
+{
+    printf("tmModuleTest: myTransactionObserver::OnFlushReply [%d]\n", aStatus);
+    return NS_OK;
+}
+
+
+//-----------------------------------------------------------------------------
+
+int main(PRInt32 argc, char *argv[])
+{
+  nsresult rv;
+
+  // default string values
+  strcpy(profileName, "defaultProfile");
+  strcpy(queueName, "defaultQueue");
+  strcpy(data, "test data");
+
+  { // scope the command line option gathering (needed for some reason)
+
+    // Get command line options
+    PLOptStatus os;
+    PLOptState *opt = PL_CreateOptState(argc, argv, "bdfhlp:q:");
+
+    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
+    {
+	    if (PL_OPT_BAD == os) continue;
+      switch (opt->option)
+      {
+        case 'b':  /* broadcast a bunch of messages */
+          printf("tmModuleTest: broadcaster\n");
+          optMode = 'b';
+          break;
+        case 'd':  /* debug mode */
+          printf("tmModuleTest: debugging baby\n");
+          optDebug = 1;
+          break;
+        case 'f':  /* broadcast and flush */
+          printf("tmModuleTest: flusher\n");
+          optMode = 'f';
+          break;
+        case 'h':  /* broadcast and detach */
+          printf("tmModuleTest: hit-n-run\n");
+          optMode = 'h';
+          break;
+        case 'l':  /* don't broadcast, just listen */
+          printf("tmModuleTest: listener\n");
+          optMode = 'l';
+          break;
+        case 'p':  /* set the profile name */
+          strcpy(profileName, opt->value);
+          printf("tmModuleTest: profilename:%s\n",profileName);
+          break;
+        case 'q':  /* set the queue name */
+          strcpy(queueName, opt->value);
+          printf("tmModuleTest: queuename:%s\n",queueName);
+          break;
+        default:
+          printf("tmModuleTest: default\n");
+          break;
+      }
+    }
+    PL_DestroyOptState(opt);
+  } // scope the command line option gathering (needed for some reason)
+
+  { // scope the nsCOMPtrs
+
+    printf("tmModuleTest: Starting xpcom\n");
+   
+    // xpcom startup stuff
+    nsCOMPtr<nsIServiceManager> servMan;
+    NS_InitXPCOM2(getter_AddRefs(servMan), nsnull, nsnull);
+    nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(servMan);
+    NS_ASSERTION(registrar, "Null nsIComponentRegistrar");
+    if (registrar)
+      registrar->AutoRegister(nsnull);
+
+    // Create the Event Queue for this thread...
+    nsCOMPtr<nsIEventQueueService> eqs = do_GetService(kEventQueueServiceCID, &rv);
+    RETURN_IF_FAILED(rv, "do_GetService(EventQueueService)");
+
+    rv = eqs->CreateMonitoredThreadEventQueue();
+    RETURN_IF_FAILED(rv, "CreateMonitoredThreadEventQueue");
+
+    rv = eqs->GetThreadEventQueue(NS_CURRENT_THREAD, &gEventQ);
+    RETURN_IF_FAILED(rv, "GetThreadEventQueue");
+
+    // Need to make sure the ipc system has been started
+    printf("tmModuleTest: getting ipc service\n");
+    nsCOMPtr<ipcIService> ipcServ(do_GetService("@mozilla.org/ipc/service;1", &rv));
+    RETURN_IF_FAILED(rv, "do_GetService(ipcServ)");
+    NS_ADDREF(gIpcServ = ipcServ);
+
+    // Get the transaction service
+    printf("tmModuleTest: getting transaction service\n");
+    nsCOMPtr<ipcITransactionService> transServ(do_GetService("@mozilla.org/ipc/transaction-service;1", &rv));
+    RETURN_IF_FAILED(rv, "do_GetService(transServ)");
+    NS_ADDREF(gTransServ = transServ);
+
+    // transaction specifc startup stuff, done for all cases
+
+    nsCOMPtr<ipcITransactionObserver> observ = new myTransactionObserver();
+
+    // initialize the transaction service with a specific profile
+    gTransServ->Init(nsDependentCString(profileName));
+    printf("tmModuleTest: using profileName [%s]\n", profileName);
+
+    // attach to the queue in the transaction manager
+    gTransServ->Attach(nsDependentCString(queueName), observ, PR_TRUE);
+    printf("tmModuleTest: observing queue [%s]\n", queueName);
+
+
+    // run specific patterns based on the mode 
+    int i = 0;       // wasn't working inside the cases
+    switch (optMode)
+    {
+      case 's':
+        printf("tmModuleTest: start standard\n");
+        // post a couple events
+        for (; i < 5 ; i++) {
+          gTransServ->PostTransaction(nsDependentCString(queueName), (PRUint8 *)data, dataLen);
+        }
+        // listen for events
+        while (gKeepRunning)
+          gEventQ->ProcessPendingEvents();
+        printf("tmModuleTest: end standard\n");
+        break;
+      case 'b':
+        printf("tmModuleTest: start broadcast\n");
+        // post a BUNCH of messages
+        for (; i < 50; i++) {
+          gTransServ->PostTransaction(nsDependentCString(queueName), (PRUint8 *)data, dataLen);
+        }
+        // listen for events
+        while (gKeepRunning)
+          gEventQ->ProcessPendingEvents();
+        printf("tmModuleTest: end broadcast\n");
+        break;
+      case 'f':
+        printf("tmModuleTest: start flush\n");
+        // post a couple events
+        for (; i < 5; i++) {
+          gTransServ->PostTransaction(nsDependentCString(queueName), (PRUint8 *)data, dataLen);
+        }
+        // flush the queue
+        gTransServ->Flush(nsDependentCString(queueName), PR_TRUE);
+        // post a couple events
+        for (i=0; i < 8; i++) {
+          gTransServ->PostTransaction(nsDependentCString(queueName), (PRUint8 *)data, dataLen);
+        }
+        // listen for events
+        while (gKeepRunning)
+          gEventQ->ProcessPendingEvents();
+        // detach
+        gTransServ->Detach(nsDependentCString(queueName));
+        printf("tmModuleTest: end flush\n");
+        break;
+      case 'h':
+        printf("tmModuleTest: start hit-n-run\n");
+        // post a couple events
+        for (; i < 5; i++) {
+          gTransServ->PostTransaction(nsDependentCString(queueName), (PRUint8 *)data, dataLen);
+        }
+        // detach
+        gTransServ->Detach(nsDependentCString(queueName));
+        printf("tmModuleTest: end hit-n-run\n");
+        break;
+      case 'l':
+        printf("tmModuleTest: start listener\n");
+        // listen for events
+        while (gKeepRunning)
+          gEventQ->ProcessPendingEvents();
+        printf("tmModuleTest: end listener\n");
+        break;
+      default :
+        printf("tmModuleTest: start & end default\n");
+        break;
+    }
+
+    // shutdown process
+
+    NS_RELEASE(gTransServ);
+    NS_RELEASE(gIpcServ);
+
+    printf("tmModuleTest: processing remaining events\n");
+
+    // process any remaining events
+    PLEvent *ev;
+    while (NS_SUCCEEDED(gEventQ->GetEvent(&ev)) && ev)
+      gEventQ->HandleEvent(ev);
+
+    printf("tmModuleTest: done\n");
+  } // this scopes the nsCOMPtrs
+
+  // helps with shutdown on some cases
+  PR_Sleep(PR_SecondsToInterval(4));
+
+  // no nsCOMPtrs are allowed to be alive when you call NS_ShutdownXPCOM
+  rv = NS_ShutdownXPCOM(nsnull);
+  NS_ASSERTION(NS_SUCCEEDED(rv), "NS_ShutdownXPCOM failed");
+
+  return 0;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/ipc.pkg b/src/libs/xpcom18a4/ipc/ipcd/ipc.pkg
new file mode 100644
index 00000000..a2171122
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/ipc.pkg
@@ -0,0 +1,21 @@
+[gecko]
+dist/bin/mozipcd@BINS@
+#if OS_ARCH==OS2
+dist/bin/ipc/modules/@DLLP@lockmod@DLLS@
+#else
+dist/bin/ipc/modules/@DLLP@lockmodule@DLLS@
+#endif
+dist/bin/ipc/modules/@DLLP@transmgr@DLLS@
+dist/bin/components/@DLLP@ipcdc@DLLS@
+!xpt dist/bin/components/ipcd.xpt
+
+#if ENABLE_TESTS
+[gecko-tests]
+dist/bin/TestIPC@BINS@
+dist/bin/tmModuleTest@BINS@
+#if USE_SHORT_LIBNAME
+dist/bin/ipc/modules/@DLLP@testmod@DLLS@
+#else
+dist/bin/ipc/modules/@DLLP@testmodule@DLLS@
+#endif
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/shared/src/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/shared/src/Makefile.in
new file mode 100644
index 00000000..ffcaa10c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/Makefile.in
@@ -0,0 +1,65 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE				= ipcd
+LIBRARY_NAME		= ipcdshared_s
+FORCE_STATIC_LIB 	= 1
+MODULE_NAME			= ipcd
+
+# required for #include "nsID.h"
+REQUIRES	= \
+			xpcom \
+			$(NULL)
+
+CPPSRCS		= \
+			ipcLog.cpp \
+			ipcConfig.cpp \
+			ipcMessage.cpp \
+			ipcMessagePrimitives.cpp \
+			ipcStringList.cpp \
+			ipcIDList.cpp \
+			ipcm.cpp
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcConfig.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcConfig.cpp
new file mode 100644
index 00000000..5f829626
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcConfig.cpp
@@ -0,0 +1,104 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#if defined(XP_WIN)
+#elif defined(XP_OS2) && defined(XP_OS2_NATIVEIPC)
+#else
+#include <string.h>
+#ifdef XP_UNIX
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#endif
+#include "ipcConfig.h"
+#include "ipcLog.h"
+#include "prenv.h"
+#include "plstr.h"
+
+#if defined(XP_OS2) && !defined(XP_OS2_NATIVEIPC)
+#ifdef VBOX
+static const char kDefaultSocketPrefix[] = "\\socket\\vbox-";
+#else
+static const char kDefaultSocketPrefix[] = "\\socket\\mozilla-";
+#endif
+static const char kDefaultSocketSuffix[] = "-ipc\\ipcd";
+#else
+#ifdef VBOX
+static const char kDefaultSocketPrefix[] = "/tmp/.vbox-";
+#else
+static const char kDefaultSocketPrefix[] = "/tmp/.mozilla-";
+#endif
+static const char kDefaultSocketSuffix[] = "-ipc/ipcd";
+#endif
+
+void IPC_GetDefaultSocketPath(char *buf, PRUint32 bufLen)
+{
+    const char *logName;
+    int len;
+
+    PL_strncpyz(buf, kDefaultSocketPrefix, bufLen);
+    buf    += (sizeof(kDefaultSocketPrefix) - 1);
+    bufLen -= (sizeof(kDefaultSocketPrefix) - 1);
+
+    logName = PR_GetEnv("VBOX_IPC_SOCKETID");
+#if defined(VBOX) && defined(XP_UNIX)
+    if (!logName || !logName[0]) {
+        struct passwd *passStruct = getpwuid(getuid());
+        if (passStruct)
+            logName = passStruct->pw_name;
+    }
+#endif
+    if (!logName || !logName[0]) {
+        logName = PR_GetEnv("LOGNAME");
+        if (!logName || !logName[0]) {
+            logName = PR_GetEnv("USER");
+            if (!logName || !logName[0]) {
+                LOG(("could not determine username from environment\n"));
+                goto end;
+            }
+        }
+    }
+    PL_strncpyz(buf, logName, bufLen);
+    len = strlen(logName);
+    buf    += len;
+    bufLen -= len;
+
+end:
+    PL_strncpyz(buf, kDefaultSocketSuffix, bufLen);
+}
+
+#endif
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcConfig.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcConfig.h
new file mode 100644
index 00000000..ab8b10e5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcConfig.h
@@ -0,0 +1,98 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcProto_h__
+#define ipcProto_h__
+
+#if defined(XP_WIN)
+//
+// use WM_COPYDATA messages
+//
+#include "prprf.h"
+
+#define IPC_WINDOW_CLASS              "Mozilla:IPCWindowClass"
+#define IPC_WINDOW_NAME               "Mozilla:IPCWindow"
+#define IPC_CLIENT_WINDOW_CLASS       "Mozilla:IPCAppWindowClass"
+#define IPC_CLIENT_WINDOW_NAME_PREFIX "Mozilla:IPCAppWindow:"
+#define IPC_SYNC_EVENT_NAME           "Local\\MozillaIPCSyncEvent"
+#ifndef IPC_DAEMON_APP_NAME
+#define IPC_DAEMON_APP_NAME           "mozilla-ipcd.exe"
+#endif
+#define IPC_PATH_SEP_CHAR             '\\'
+#define IPC_MODULES_DIR               "ipc\\modules"
+
+#define IPC_CLIENT_WINDOW_NAME_MAXLEN (sizeof(IPC_CLIENT_WINDOW_NAME_PREFIX) + 20)
+
+// writes client name into buf.  buf must be at least
+// IPC_CLIENT_WINDOW_NAME_MAXLEN bytes in length.
+inline void IPC_GetClientWindowName(PRUint32 pid, char *buf)
+{
+    PR_snprintf(buf, IPC_CLIENT_WINDOW_NAME_MAXLEN, "%s%u",
+                IPC_CLIENT_WINDOW_NAME_PREFIX, pid);
+}
+
+#else
+#include "nscore.h"
+//
+// use UNIX domain socket
+//
+#define IPC_PORT                0
+#define IPC_SOCKET_TYPE         "ipc"
+#if defined(XP_OS2)
+#ifndef IPC_DAEMON_APP_NAME
+#define IPC_DAEMON_APP_NAME     "mozilla-ipcd.exe"
+#endif
+#define IPC_PATH_SEP_CHAR       '\\'
+#define IPC_MODULES_DIR         "ipc\\modules"
+#else
+#ifndef IPC_DAEMON_APP_NAME
+#define IPC_DAEMON_APP_NAME     "mozilla-ipcd"
+#endif
+#define IPC_PATH_SEP_CHAR       '/'
+#define IPC_MODULES_DIR         "ipc/modules"
+#endif
+
+NS_HIDDEN_(void) IPC_GetDefaultSocketPath(char *buf, PRUint32 bufLen);
+
+#endif
+
+// common shared configuration values
+
+#define IPC_STARTUP_PIPE_NAME   "ipc:startup-pipe"
+#define IPC_STARTUP_PIPE_MAGIC  0x1C
+
+#endif // !ipcProto_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcIDList.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcIDList.cpp
new file mode 100644
index 00000000..0f64a3a0
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcIDList.cpp
@@ -0,0 +1,62 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcIDList.h"
+
+ipcIDNode *
+ipcIDList::FindNode(ipcIDNode *node, const nsID &id)
+{
+    while (node) {
+        if (node->Equals(id))
+            return node;
+        node = node->mNext;
+    }
+    return NULL;
+}
+
+ipcIDNode *
+ipcIDList::FindNodeBefore(ipcIDNode *node, const nsID &id)
+{
+    ipcIDNode *prev = NULL;
+    while (node) {
+        if (node->Equals(id))
+            return prev;
+        prev = node;
+        node = node->mNext;
+    }
+    return NULL;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcIDList.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcIDList.h
new file mode 100644
index 00000000..b4fd1512
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcIDList.h
@@ -0,0 +1,108 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcIDList_h__
+#define ipcIDList_h__
+
+#include "nsID.h"
+#include "ipcList.h"
+
+//-----------------------------------------------------------------------------
+// nsID node
+//-----------------------------------------------------------------------------
+
+class ipcIDNode
+{
+public:
+    ipcIDNode(const nsID &id)
+        : mID(id)
+        { }
+
+    const nsID &Value() const { return mID; }
+
+    PRBool Equals(const nsID &id) const { return mID.Equals(id); }
+
+    class ipcIDNode *mNext;
+private:
+    nsID mID;
+};
+
+//-----------------------------------------------------------------------------
+// singly-linked list of nsIDs
+//-----------------------------------------------------------------------------
+
+class ipcIDList : public ipcList<ipcIDNode>
+{
+public:
+    typedef ipcList<ipcIDNode> Super;
+
+    void Prepend(const nsID &id)
+    {
+        Super::Prepend(new ipcIDNode(id));
+    }
+
+    void Append(const nsID &id)
+    {
+        Super::Append(new ipcIDNode(id));
+    }
+
+    const ipcIDNode *Find(const nsID &id) const
+    {
+        return FindNode(mHead, id);
+    }
+
+    PRBool FindAndDelete(const nsID &id)
+    {
+        ipcIDNode *node = FindNodeBefore(mHead, id);
+        if (node) {
+            DeleteAfter(node);
+            return PR_TRUE;
+        }
+        else if (!IsEmpty()) {
+            DeleteFirst();
+            return PR_TRUE;
+        }
+
+        return PR_FALSE;
+    }
+
+private:
+    static NS_HIDDEN_(ipcIDNode *) FindNode      (ipcIDNode *head, const nsID &id);
+    static NS_HIDDEN_(ipcIDNode *) FindNodeBefore(ipcIDNode *head, const nsID &id);
+};
+
+#endif // !ipcIDList_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcList.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcList.h
new file mode 100644
index 00000000..a9b9c959
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcList.h
@@ -0,0 +1,211 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcList_h__
+#define ipcList_h__
+
+#include "prtypes.h"
+
+//-----------------------------------------------------------------------------
+// simple list of singly-linked objects.  class T must have the following
+// structure:
+//
+//   class T {
+//   ...
+//   public:
+//     T *mNext;
+//   };
+//
+// objects added to the list must be allocated with operator new.  class T may
+// optionally inherit from ipcListNode<T> if it doesn't wish to define mNext
+// explicitly.
+//-----------------------------------------------------------------------------
+
+template<class T>
+class ipcList
+{
+public:
+    ipcList()
+        : mHead(NULL)
+        , mTail(NULL)
+        { }
+   ~ipcList() { DeleteAll(); }
+
+    //
+    // prepends obj at the beginning of the list.
+    //
+    void Prepend(T *obj)
+    {
+        obj->mNext = mHead;
+        mHead = obj;
+        if (!mTail)
+            mTail = mHead;
+    }
+
+    //
+    // appends obj to the end of the list.
+    //
+    void Append(T *obj)
+    {
+        obj->mNext = NULL;
+        if (mTail) {
+            mTail->mNext = obj;
+            mTail = obj;
+        }
+        else
+            mTail = mHead = obj;
+    }
+
+    //
+    // inserts b into the list after a.
+    //
+    void InsertAfter(T *a, T *b)
+    {
+        b->mNext = a->mNext;
+        a->mNext = b;
+        if (mTail == a)
+            mTail = b;
+    }
+
+    // 
+    // removes first element w/o deleting it
+    //
+    void RemoveFirst()
+    {
+        if (mHead)
+            AdvanceHead();
+    }
+
+    //
+    // removes element after the given element w/o deleting it
+    //
+    void RemoveAfter(T *obj)
+    {
+        T *rej = obj->mNext;
+        if (rej) {
+            obj->mNext = rej->mNext;
+            if (rej == mTail)
+                mTail = obj;
+        }
+    }
+
+    //
+    // deletes first element
+    //
+    void DeleteFirst()
+    {
+        T *first = mHead;
+        if (first) {
+            AdvanceHead();
+            delete first;
+        }
+    }
+
+    //
+    // deletes element after the given element
+    //
+    void DeleteAfter(T *obj)
+    {
+        T *rej = obj->mNext;
+        if (rej) {
+            RemoveAfter(obj);
+            delete rej;
+        }
+    }
+
+    //
+    // deletes all elements
+    //
+    void DeleteAll()
+    {
+        while (mHead)
+            DeleteFirst();
+    }
+
+    const T *First() const { return mHead; }
+    T       *First()       { return mHead; }
+    const T *Last() const  { return mTail; }
+    T       *Last()        { return mTail; }
+
+    PRBool  IsEmpty() const { return mHead == NULL; }
+
+    //
+    // moves contents of list to another list
+    //
+    void MoveTo(ipcList<T> &other)
+    {
+        other.mHead = mHead;
+        other.mTail = mTail;
+        mHead = NULL;
+        mTail = NULL;
+    }
+
+    // gets count of list elements
+    PRUint32 Count()
+    {
+        T *obj = mHead;
+        PRUint32 count = 0;
+        while (obj) {
+            count++;
+            obj = obj->mNext;
+        }
+
+        return count;
+    }
+
+protected:
+    void AdvanceHead()
+    {
+        mHead = mHead->mNext;
+        if (!mHead)
+            mTail = NULL;
+    }
+
+    T *mHead;
+    T *mTail;
+};
+
+template<class T>
+class ipcListNode
+{
+public:
+    ipcListNode() : mNext(nsnull) {}
+
+    T *mNext;
+};
+
+#endif // !ipcList_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcLog.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcLog.cpp
new file mode 100644
index 00000000..340b211c
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcLog.cpp
@@ -0,0 +1,181 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcLog.h"
+
+#ifdef IPC_LOGGING
+
+#include <string.h>
+#include <ctype.h>
+
+#include "prenv.h"
+#include "prprf.h"
+#include "prthread.h"
+#include "plstr.h"
+
+#ifdef VBOX
+# if defined(__OS2__) && defined(PAGE_SIZE)
+#  undef PAGE_SIZE
+# endif
+# include <iprt/initterm.h> // for RTR3InitDll
+#else // !VBOX
+PRBool ipcLogEnabled = PR_FALSE;
+#endif // !VBOX
+
+char ipcLogPrefix[10] = {0};
+
+#ifndef VBOX
+
+//-----------------------------------------------------------------------------
+// UNIX
+//-----------------------------------------------------------------------------
+#if defined(XP_UNIX) || defined(XP_OS2) || defined(XP_BEOS)
+
+#include <sys/types.h>
+#include <unistd.h>
+
+static inline PRUint32
+WritePrefix(char *buf, PRUint32 bufLen)
+{
+    return PR_snprintf(buf, bufLen, "[%u:%p] %s ",
+                       (unsigned) getpid(),
+                       PR_GetCurrentThread(),
+                       ipcLogPrefix);
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// WIN32
+//-----------------------------------------------------------------------------
+#ifdef XP_WIN
+#include <windows.h>
+
+static inline PRUint32
+WritePrefix(char *buf, PRUint32 bufLen)
+{
+    return PR_snprintf(buf, bufLen, "[%u:%p] %s ",
+                       GetCurrentProcessId(),
+                       PR_GetCurrentThread(),
+                       ipcLogPrefix);
+}
+#endif
+
+#endif // !VBOX
+
+//-----------------------------------------------------------------------------
+// logging API impl
+//-----------------------------------------------------------------------------
+
+void
+IPC_InitLog(const char *prefix)
+{
+#ifdef VBOX
+    // initialize VBox Runtime
+    RTR3InitDll(RTR3INIT_FLAGS_UNOBTRUSIVE);
+
+    PL_strncpyz(ipcLogPrefix, prefix, sizeof(ipcLogPrefix));
+#else
+    if (PR_GetEnv("IPC_LOG_ENABLE")) {
+        ipcLogEnabled = PR_TRUE;
+        PL_strncpyz(ipcLogPrefix, prefix, sizeof(ipcLogPrefix));
+    }
+#endif
+}
+
+void
+IPC_Log(const char *fmt, ... )
+{
+    va_list ap;
+    va_start(ap, fmt);
+    PRUint32 nb = 0;
+    char buf[512];
+
+#ifdef VBOX
+    if (ipcLogPrefix[0]) {
+        nb = strlen(ipcLogPrefix);
+        if (nb > sizeof(buf) - 2)
+            nb = sizeof(buf) - 2;
+        PL_strncpy(buf, ipcLogPrefix, nb);
+        buf[nb++] = ' ';
+    }
+#else
+    if (ipcLogPrefix[0])
+        nb = WritePrefix(buf, sizeof(buf));
+#endif
+
+    PR_vsnprintf(buf + nb, sizeof(buf) - nb, fmt, ap);
+    buf[sizeof(buf) - 1] = '\0';
+
+#ifdef VBOX
+    LogFlow(("%s", buf));
+#else
+    fwrite(buf, strlen(buf), 1, stdout);
+#endif
+
+    va_end(ap);
+}
+
+void
+IPC_LogBinary(const PRUint8 *data, PRUint32 len)
+{
+    PRUint32 i, j, ln;
+    for (i=0; i<len; ) {
+        char line[100] = "";
+        const PRUint8 *p;
+
+        ln = 0;
+
+        p = &data[i];
+        for (j=0; j<PR_MIN(8, len - i); ++j, ++p)
+            ln += PR_snprintf(line + ln, sizeof(line) - ln, "%02x  ", *p);
+
+        for (; ln < 32; ++ln)
+            line[ln] = ' ';
+
+        p = &data[i];
+        for (j=0; j<PR_MIN(8, len - i); ++j, ++p)
+            ln += PR_snprintf(line + ln, sizeof(line) - ln, "%c", isprint(*p) ? *p : '.');
+
+        line[ln] = '\0';
+
+        i += (p - &data[i]);
+
+        LOG(("%s\n", line));
+    }
+}
+
+#endif // IPC_LOGGING
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcLog.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcLog.h
new file mode 100644
index 00000000..e21f6211
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcLog.h
@@ -0,0 +1,111 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcLog_h__
+#define ipcLog_h__
+
+#include "nscore.h"
+#include "prtypes.h"
+
+#ifndef VBOX
+#ifdef DEBUG
+#define IPC_LOGGING
+#endif
+#endif
+
+#ifdef IPC_LOGGING
+
+#ifdef VBOX
+
+/* Redefine logging group to IPC */
+# ifdef LOG_GROUP
+#  undef LOG_GROUP
+# endif
+# define LOG_GROUP LOG_GROUP_IPC
+
+/* Ensure log macros are enabled */
+# ifndef LOG_ENABLED
+#  define LOG_ENABLED
+# endif
+
+#include <VBox/log.h>
+
+extern NS_HIDDEN_(void) IPC_InitLog(const char *prefix);
+extern NS_HIDDEN_(void) IPC_Log(const char *fmt, ...);
+extern NS_HIDDEN_(void) IPC_LogBinary(const PRUint8 *data, PRUint32 len);
+
+# define IPC_LOG(_args) \
+    PR_BEGIN_MACRO \
+        if (IPC_LOG_ENABLED()) \
+            IPC_Log _args; \
+    PR_END_MACRO
+
+/* IPC_Log() internally uses LogFlow() so use LogIsFlowEnabled() below */
+# define IPC_LOG_ENABLED() (LogIsFlowEnabled())
+
+# define LOG(args)     IPC_LOG(args)
+
+#else  /* !VBOX */
+
+extern PRBool ipcLogEnabled;
+extern NS_HIDDEN_(void) IPC_InitLog(const char *prefix);
+extern NS_HIDDEN_(void) IPC_Log(const char *fmt, ...);
+extern NS_HIDDEN_(void) IPC_LogBinary(const PRUint8 *data, PRUint32 len);
+
+#define IPC_LOG(_args)         \
+    PR_BEGIN_MACRO             \
+        if (ipcLogEnabled)     \
+            IPC_Log _args;     \
+    PR_END_MACRO
+
+#define IPC_LOG_ENABLED() ipcLogEnabled
+    
+#define LOG(args)     IPC_LOG(args)
+
+#endif /* !VBOX */
+
+#else // IPC_LOGGING
+
+#define IPC_InitLog(prefix) PR_BEGIN_MACRO PR_END_MACRO
+#define IPC_LogBinary(data, len) PR_BEGIN_MACRO PR_END_MACRO
+#define IPC_LOG(_args) PR_BEGIN_MACRO PR_END_MACRO
+#define IPC_LOG_ENABLED() (0)
+#define LOG(args) PR_BEGIN_MACRO PR_END_MACRO
+
+#endif // IPC_LOGGING
+
+#endif // !ipcLog_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessage.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessage.cpp
new file mode 100644
index 00000000..bfdc7efe
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessage.cpp
@@ -0,0 +1,280 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include <string.h>
+#include "prlog.h"
+#include "ipcMessage.h"
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+# include <iprt/mem.h>
+#endif
+
+ipcMessage::~ipcMessage()
+{
+    if (mMsgHdr)
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+        RTMemFree(mMsgHdr);
+#else
+        free(mMsgHdr);
+#endif
+}
+
+void
+ipcMessage::Reset()
+{
+    if (mMsgHdr) {
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+        RTMemFree(mMsgHdr);
+#else
+        free(mMsgHdr);
+#endif
+        mMsgHdr = NULL;
+    }
+
+    mMsgOffset = 0;
+    mMsgComplete = PR_FALSE;
+}
+
+ipcMessage *
+ipcMessage::Clone() const
+{
+    ipcMessage *clone = new ipcMessage();
+    if (!clone)
+        return NULL;
+
+    // copy buf if non-null
+    if (mMsgHdr) {
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+        clone->mMsgHdr = (ipcMessageHeader *) RTMemDup(mMsgHdr, mMsgHdr->mLen);
+#else
+        clone->mMsgHdr = (ipcMessageHeader *) malloc(mMsgHdr->mLen);
+        memcpy(clone->mMsgHdr, mMsgHdr, mMsgHdr->mLen);
+#endif
+    }
+    else
+        clone->mMsgHdr = NULL;
+
+    clone->mMsgOffset = mMsgOffset;
+    clone->mMsgComplete = mMsgComplete;
+
+    return clone;
+}
+
+PRStatus
+ipcMessage::Init(const nsID &target, const char *data, PRUint32 dataLen)
+{
+    if (mMsgHdr)
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+        RTMemFree(mMsgHdr);
+#else
+        free(mMsgHdr);
+#endif
+    mMsgComplete = PR_FALSE;
+
+    // allocate message data
+    PRUint32 msgLen = IPC_MSG_HEADER_SIZE + dataLen;
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    mMsgHdr = (ipcMessageHeader *) RTMemAlloc(msgLen);
+#else
+    mMsgHdr = (ipcMessageHeader *) malloc(msgLen);
+#endif
+    if (!mMsgHdr) {
+        mMsgHdr = NULL;
+        return PR_FAILURE;
+    }
+
+    // fill in message data
+    mMsgHdr->mLen = msgLen;
+    mMsgHdr->mVersion = IPC_MSG_VERSION;
+    mMsgHdr->mFlags = 0;
+    mMsgHdr->mTarget = target;
+
+    if (data)
+        SetData(0, data, dataLen);
+
+    mMsgComplete = PR_TRUE;
+    return PR_SUCCESS;
+}
+
+PRStatus
+ipcMessage::SetData(PRUint32 offset, const char *data, PRUint32 dataLen)
+{
+    PR_ASSERT(mMsgHdr != NULL);
+
+    if (offset + dataLen > DataLen())
+        return PR_FAILURE;
+
+    memcpy((char *) Data() + offset, data, dataLen);
+    return PR_SUCCESS;
+}
+
+PRBool
+ipcMessage::Equals(const nsID &target, const char *data, PRUint32 dataLen) const
+{
+    return mMsgComplete &&
+           mMsgHdr->mTarget.Equals(target) &&
+           DataLen() == dataLen &&
+           memcmp(Data(), data, dataLen) == 0;
+}
+
+PRBool
+ipcMessage::Equals(const ipcMessage *msg) const
+{
+    PRUint32 msgLen = MsgLen();
+    return mMsgComplete && msg->mMsgComplete &&
+           msgLen == msg->MsgLen() &&
+           memcmp(MsgBuf(), msg->MsgBuf(), msgLen) == 0;
+}
+
+PRStatus
+ipcMessage::WriteTo(char     *buf,
+                    PRUint32  bufLen,
+                    PRUint32 *bytesWritten,
+                    PRBool   *complete)
+{
+    if (!mMsgComplete)
+        return PR_FAILURE;
+
+    if (mMsgOffset == MsgLen()) {
+        *bytesWritten = 0;
+        *complete = PR_TRUE;
+        return PR_SUCCESS;
+    }
+
+    PRUint32 count = MsgLen() - mMsgOffset;
+    if (count > bufLen)
+        count = bufLen;
+
+    memcpy(buf, MsgBuf() + mMsgOffset, count);
+    mMsgOffset += count;
+
+    *bytesWritten = count;
+    *complete = (mMsgOffset == MsgLen());
+
+    return PR_SUCCESS;
+}
+
+PRStatus
+ipcMessage::ReadFrom(const char *buf,
+                     PRUint32    bufLen,
+                     PRUint32   *bytesRead,
+                     PRBool     *complete)
+{
+    *bytesRead = 0;
+
+    if (mMsgComplete) {
+        *complete = PR_TRUE;
+        return PR_SUCCESS;
+    }
+
+    if (mMsgHdr) {
+        // appending data to buffer
+        if (mMsgOffset < sizeof(PRUint32)) {
+            // we haven't learned the message length yet
+            if (mMsgOffset + bufLen < sizeof(PRUint32)) {
+                // we still don't know the length of the message!
+                memcpy((char *) mMsgHdr + mMsgOffset, buf, bufLen);
+                mMsgOffset += bufLen;
+                *bytesRead = bufLen;
+                *complete = PR_FALSE;
+                return PR_SUCCESS;
+            }
+            else {
+                // we now have enough data to determine the message length
+                PRUint32 count = sizeof(PRUint32) - mMsgOffset;
+                memcpy((char *) MsgBuf() + mMsgOffset, buf, count);
+                mMsgOffset += count;
+                buf += count;
+                bufLen -= count;
+                *bytesRead = count;
+
+                if (MsgLen() > IPC_MSG_GUESSED_SIZE) {
+                    // realloc message buffer to the correct size
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+                    mMsgHdr = (ipcMessageHeader *) RTMemRealloc(mMsgHdr, MsgLen());
+#else
+                    mMsgHdr = (ipcMessageHeader *) realloc(mMsgHdr, MsgLen());
+#endif
+                }
+            }
+        }
+    }
+    else {
+        if (bufLen < sizeof(PRUint32)) {
+            // not enough data available in buffer to determine allocation size
+            // allocate a partial buffer
+            PRUint32 msgLen = IPC_MSG_GUESSED_SIZE;
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+            mMsgHdr = (ipcMessageHeader *) RTMemAlloc(msgLen);
+#else
+            mMsgHdr = (ipcMessageHeader *) malloc(msgLen);
+#endif
+            if (!mMsgHdr)
+                return PR_FAILURE;
+            memcpy(mMsgHdr, buf, bufLen);
+            mMsgOffset = bufLen;
+            *bytesRead = bufLen;
+            *complete = PR_FALSE;
+            return PR_SUCCESS;
+        }
+        else {
+            PRUint32 msgLen = *(PRUint32 *) buf;
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+            mMsgHdr = (ipcMessageHeader *) RTMemAlloc(msgLen);
+#else
+            mMsgHdr = (ipcMessageHeader *) malloc(msgLen);
+#endif
+            if (!mMsgHdr)
+                return PR_FAILURE;
+            mMsgHdr->mLen = msgLen;
+            mMsgOffset = 0;
+        }
+    }
+
+    // have mMsgHdr at this point
+
+    PRUint32 count = MsgLen() - mMsgOffset;
+    if (count > bufLen)
+        count = bufLen;
+
+    memcpy((char *) mMsgHdr + mMsgOffset, buf, count);
+    mMsgOffset += count;
+    *bytesRead += count;
+
+    *complete = mMsgComplete = (mMsgOffset == MsgLen());
+    return PR_SUCCESS;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessage.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessage.h
new file mode 100644
index 00000000..c9f8f184
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessage.h
@@ -0,0 +1,214 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcMessage_h__
+#define ipcMessage_h__
+
+#include "nsID.h"
+
+//
+// ipc message format:
+//
+//   +------------------------------------+
+//   | DWORD : length                     |
+//   +------------------+-----------------+
+//   | WORD  : version  | WORD : flags    |
+//   +------------------+-----------------+
+//   | nsID  : target                     |
+//   +------------------------------------+
+//   | data                               |
+//   +------------------------------------+
+//
+// header is 24 bytes.  flags are defined below.  default value of flags is
+// zero.  protocol implementations should ignore unrecognized flags.  target
+// is a 16 byte UUID indicating the intended receiver of this message.
+//
+
+struct ipcMessageHeader
+{
+    PRUint32 mLen;
+    PRUint16 mVersion;
+    PRUint16 mFlags;
+    nsID     mTarget;
+};
+
+#define IPC_MSG_VERSION       (0x1)
+#define IPC_MSG_HEADER_SIZE   (sizeof(ipcMessageHeader))
+#define IPC_MSG_GUESSED_SIZE  (IPC_MSG_HEADER_SIZE + 64)
+
+//
+// the IPC message protocol supports synchronous messages.  these messages can
+// only be sent from a client to the daemon.  a daemon module cannot send a
+// synchronous message.  the client sets the SYNC_QUERY flag to indicate that
+// it is expecting a response with the SYNC_REPLY flag set.
+//
+#define IPC_MSG_FLAG_SYNC_QUERY (0x1)
+#define IPC_MSG_FLAG_SYNC_REPLY (0x2)
+
+//
+// a special flag to prevent repeated processing of the same message by two
+// or more selectors when walking through the queue of pending messages
+// in WaitTarget().
+//
+#define IPC_MSG_FLAG_IN_PROCESS (0x4)
+
+//-----------------------------------------------------------------------------
+// ipcMessage
+//-----------------------------------------------------------------------------
+
+class ipcMessage
+{
+public:
+    ipcMessage()
+        : mNext(NULL)
+        , mMetaData(0)
+        , mMsgHdr(NULL)
+        , mMsgOffset(0)
+        , mMsgComplete(PR_FALSE)
+        { }
+    ipcMessage(const nsID &target, const char *data, PRUint32 dataLen)
+        : mNext(NULL)
+        , mMetaData(0)
+        , mMsgHdr(NULL)
+        , mMsgOffset(0)
+        { Init(target, data, dataLen); }
+   ~ipcMessage() NS_HIDDEN;
+
+    //
+    // reset message to uninitialized state
+    //
+    NS_HIDDEN_(void) Reset();
+
+    // 
+    // create a copy of this message
+    //
+    NS_HIDDEN_(ipcMessage *) Clone() const;
+
+    //
+    // initialize message
+    //
+    // param:
+    //   topic   - message topic string
+    //   data    - message data (may be null to leave data uninitialized)
+    //   dataLen - message data len
+    //
+    NS_HIDDEN_(PRStatus) Init(const nsID &target, const char *data, PRUint32 dataLen);
+
+    //
+    // copy data into the message's data section, starting from offset.  this
+    // function can be used to write any portion of the message's data.
+    //
+    // param:
+    //   offset  - destination offset
+    //   data    - data to write
+    //   dataLen - number of bytes to write
+    //
+    NS_HIDDEN_(PRStatus) SetData(PRUint32 offset, const char *data, PRUint32 dataLen);
+
+    //
+    // access message flags
+    //
+    void SetFlag(PRUint16 flag)          { mMsgHdr->mFlags |= flag; }
+    void ClearFlag(PRUint16 flag)        { mMsgHdr->mFlags &= ~flag; }
+    PRBool TestFlag(PRUint16 flag) const { return mMsgHdr->mFlags & flag; }
+
+    //
+    // if true, the message is complete and the members of the message
+    // can be accessed.
+    //
+    PRBool IsComplete() const { return mMsgComplete; }
+
+    //
+    // readonly accessors
+    //
+    const ipcMessageHeader *Header()  const { return mMsgHdr; }
+    const nsID             &Target()  const { return mMsgHdr->mTarget; }
+    const char             *Data()    const { return (char *) mMsgHdr + IPC_MSG_HEADER_SIZE; }
+    PRUint32                DataLen() const { return mMsgHdr->mLen - IPC_MSG_HEADER_SIZE; }
+    const char             *MsgBuf()  const { return (char *) mMsgHdr; }
+    PRUint32                MsgLen()  const { return mMsgHdr->mLen; }
+
+    //
+    // message comparison functions
+    //
+    // param:
+    //   topic   - message topic (may be null)
+    //   data    - message data (must not be null)
+    //   dataLen - message data length 
+    //
+    NS_HIDDEN_(PRBool) Equals(const nsID &target, const char *data, PRUint32 dataLen) const;
+    NS_HIDDEN_(PRBool) Equals(const ipcMessage *msg) const;
+
+    //
+    // write the message to a buffer segment; segment need not be large
+    // enough to hold entire message.  called repeatedly.
+    //
+    NS_HIDDEN_(PRStatus) WriteTo(char     *buf,
+                                 PRUint32  bufLen,
+                                 PRUint32 *bytesWritten,
+                                 PRBool   *complete);
+
+    //
+    // read the message from a buffer segment; segment need not contain
+    // the entire messgae.  called repeatedly.
+    //
+    NS_HIDDEN_(PRStatus) ReadFrom(const char *buf,
+                                  PRUint32    bufLen,
+                                  PRUint32   *bytesRead,
+                                  PRBool     *complete);
+
+    //
+    // a message can be added to a singly-linked list.
+    //
+    class ipcMessage *mNext;
+
+    //
+    // meta data associated with this message object.  the owner of the
+    // ipcMessage object is free to use this field for any purpose.  by
+    // default, it is initialized to 0.
+    //
+    PRUint32          mMetaData;
+
+private:
+    ipcMessageHeader *mMsgHdr;
+
+    // XXX document me
+    PRUint32          mMsgOffset;
+    PRPackedBool      mMsgComplete;
+};
+
+#endif // !ipcMessage_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessagePrimitives.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessagePrimitives.cpp
new file mode 100644
index 00000000..08753ddb
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessagePrimitives.cpp
@@ -0,0 +1,81 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <string.h>
+#include "ipcMessagePrimitives.h"
+
+ipcMessage_DWORD_STR::ipcMessage_DWORD_STR(const nsID &target,
+                                           PRUint32    first,
+                                           const char *second)
+{
+    int sLen = strlen(second);
+    Init(target, NULL, 4 + sLen + 1);
+    SetData(0, (char *) &first, 4);
+    SetData(4, second, sLen + 1);
+}
+
+ipcMessage_DWORD_DWORD_STR::ipcMessage_DWORD_DWORD_STR(const nsID &target,
+                                                       PRUint32    first,
+                                                       PRUint32    second,
+                                                       const char *third)
+{
+    int sLen = strlen(third);
+    Init(target, NULL, 8 + sLen + 1);
+    SetData(0, (char *) &first, 4);
+    SetData(4, (char *) &second, 4);
+    SetData(8, third, sLen + 1);
+}
+
+ipcMessage_DWORD_ID::ipcMessage_DWORD_ID(const nsID &target,
+                                         PRUint32    first,
+                                         const nsID &second)
+{
+    Init(target, NULL, 4 + sizeof(nsID));
+    SetData(0, (char *) &first, 4);
+    SetData(4, (char *) &second, sizeof(nsID));
+}
+
+ipcMessage_DWORD_DWORD_ID::ipcMessage_DWORD_DWORD_ID(const nsID &target,
+                                                     PRUint32    first,
+                                                     PRUint32    second,
+                                                     const nsID &third)
+{
+    Init(target, NULL, 8 + sizeof(nsID));
+    SetData(0, (char *) &first, 4);
+    SetData(4, (char *) &second, 4);
+    SetData(8, (char *) &third, sizeof(nsID));
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessagePrimitives.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessagePrimitives.h
new file mode 100644
index 00000000..abfa7d69
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessagePrimitives.h
@@ -0,0 +1,206 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcMessagePrimitives_h__
+#define ipcMessagePrimitives_h__
+
+#include "ipcMessage.h"
+
+class ipcMessage_DWORD : public ipcMessage
+{
+public:
+    ipcMessage_DWORD(const nsID &target, PRUint32 first)
+    {
+        Init(target, (char *) &first, sizeof(first));
+    }
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+};
+
+class ipcMessage_DWORD_DWORD : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_DWORD(const nsID &target, PRUint32 first, PRUint32 second)
+    {
+        PRUint32 data[2] = { first, second };
+        Init(target, (char *) data, sizeof(data));
+    }
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    PRUint32 Second() const
+    {
+        return ((PRUint32 *) Data())[1];
+    }
+};
+
+class ipcMessage_DWORD_DWORD_DWORD : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_DWORD_DWORD(const nsID &target, PRUint32 first, PRUint32 second, PRUint32 third)
+    {
+        PRUint32 data[3] = { first, second, third };
+        Init(target, (char *) data, sizeof(data));
+    }
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    PRUint32 Second() const
+    {
+        return ((PRUint32 *) Data())[1];
+    }
+
+    PRUint32 Third() const
+    {
+        return ((PRUint32 *) Data())[2];
+    }
+};
+
+class ipcMessage_DWORD_DWORD_DWORD_DWORD : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_DWORD_DWORD_DWORD(const nsID &target, PRUint32 first, PRUint32 second, PRUint32 third, PRUint32 fourth)
+    {
+        PRUint32 data[4] = { first, second, third, fourth };
+        Init(target, (char *) data, sizeof(data));
+    }
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    PRUint32 Second() const
+    {
+        return ((PRUint32 *) Data())[1];
+    }
+
+    PRUint32 Third() const
+    {
+        return ((PRUint32 *) Data())[2];
+    }
+
+    PRUint32 Fourth() const
+    {
+        return ((PRUint32 *) Data())[3];
+    }
+};
+
+class ipcMessage_DWORD_STR : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_STR(const nsID &target, PRUint32 first, const char *second) NS_HIDDEN;
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    const char *Second() const
+    {
+        return Data() + sizeof(PRUint32);
+    }
+};
+
+class ipcMessage_DWORD_DWORD_STR : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_DWORD_STR(const nsID &target, PRUint32 first, PRUint32 second, const char *third) NS_HIDDEN;
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    PRUint32 Second() const
+    {
+        return ((PRUint32 *) Data())[1];
+    }
+
+    const char *Third() const
+    {
+        return Data() + 2 * sizeof(PRUint32);
+    }
+};
+
+class ipcMessage_DWORD_ID : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_ID(const nsID &target, PRUint32 first, const nsID &second) NS_HIDDEN;
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    const nsID &Second() const
+    {
+        return * (const nsID *) (Data() + sizeof(PRUint32));
+    }
+};
+
+class ipcMessage_DWORD_DWORD_ID : public ipcMessage
+{
+public:
+    ipcMessage_DWORD_DWORD_ID(const nsID &target, PRUint32 first, PRUint32 second, const nsID &third) NS_HIDDEN;
+
+    PRUint32 First() const
+    {
+        return ((PRUint32 *) Data())[0];
+    }
+
+    PRUint32 Second() const
+    {
+        return ((PRUint32 *) Data())[1];
+    }
+
+    const nsID &Third() const
+    {
+        return * (const nsID *) (Data() + 2 * sizeof(PRUint32));
+    }
+};
+
+#endif // !ipcMessagePrimitives_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessageQ.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessageQ.h
new file mode 100644
index 00000000..d372713e
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessageQ.h
@@ -0,0 +1,46 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcMessageQ_h__
+#define ipcMessageQ_h__
+
+#include "ipcMessage.h"
+#include "ipcList.h"
+
+typedef ipcList<ipcMessage> ipcMessageQ;
+
+#endif // !ipcMessageQ_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessageUtils.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessageUtils.h
new file mode 100644
index 00000000..99e3e6b8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcMessageUtils.h
@@ -0,0 +1,66 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcMessageUtils_h__
+#define ipcMessageUtils_h__
+
+class ipcMessage;
+
+//
+// given code like this:
+//   
+//    const ipcmMessageClientID *msg = (const ipcmMessageClientID *) rawMsg;
+//
+// we can write:
+//
+//    ipcMessageCast<ipcmMessageClientID> msg(rawMsg);
+//
+// XXX ipcMessageCast is probably not the best name for this class.
+//
+template<class T>
+class ipcMessageCast
+{
+public:
+    ipcMessageCast() : mPtr(NULL) {}
+    ipcMessageCast(const ipcMessage *ptr) : mPtr((const T *) ptr) {}
+    void operator=(const ipcMessage *ptr) { mPtr = (const T *) ptr; }
+    const T *operator->() { return mPtr; }
+private:
+    const T *mPtr;
+};
+
+#endif // !ipcMessageUtils_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcStringList.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcStringList.cpp
new file mode 100644
index 00000000..5464f9a7
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcStringList.cpp
@@ -0,0 +1,80 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcStringList.h"
+
+void *
+ipcStringNode::operator new(size_t size, const char *str) CPP_THROW_NEW
+{
+    int len = strlen(str);
+
+    size += len;
+
+    ipcStringNode *node = (ipcStringNode *) ::operator new(size);
+    if (!node)
+        return NULL;
+
+    node->mNext = NULL;
+    memcpy(node->mData, str, len);
+    node->mData[len] = '\0';
+
+    return node;
+}
+
+ipcStringNode *
+ipcStringList::FindNode(ipcStringNode *node, const char *str)
+{
+    while (node) {
+        if (node->Equals(str))
+            return node;
+        node = node->mNext;
+    }
+    return NULL;
+}
+
+ipcStringNode *
+ipcStringList::FindNodeBefore(ipcStringNode *node, const char *str)
+{
+    ipcStringNode *prev = NULL;
+    while (node) {
+        if (node->Equals(str))
+            return prev;
+        prev = node;
+        node = node->mNext;
+    }
+    return NULL;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcStringList.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcStringList.h
new file mode 100644
index 00000000..2a2316b6
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcStringList.h
@@ -0,0 +1,114 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcStringList_h__
+#define ipcStringList_h__
+
+#include <string.h>
+#include "plstr.h"
+#include "nscore.h"
+#include "ipcList.h"
+
+//-----------------------------------------------------------------------------
+// string node
+//-----------------------------------------------------------------------------
+
+class ipcStringNode
+{
+public:
+    ipcStringNode() {}
+
+    const char *Value() const { return mData; }
+
+    PRBool Equals(const char *val) const { return strcmp(mData, val) == 0; }
+    PRBool EqualsIgnoreCase(const char *val) const { return PL_strcasecmp(mData, val) == 0; }
+
+    class ipcStringNode *mNext;
+private:
+    void *operator new(size_t size, const char *str) CPP_THROW_NEW;
+
+    // this is actually bigger
+    char mData[1];
+
+    friend class ipcStringList;
+};
+
+//-----------------------------------------------------------------------------
+// singly-linked list of strings
+//-----------------------------------------------------------------------------
+
+class ipcStringList : public ipcList<ipcStringNode>
+{
+public:
+    typedef ipcList<ipcStringNode> Super;
+
+    void Prepend(const char *str)
+    {
+        Super::Prepend(new (str) ipcStringNode());
+    }
+
+    void Append(const char *str)
+    {
+        Super::Append(new (str) ipcStringNode());
+    }
+
+    const ipcStringNode *Find(const char *str) const
+    {
+        return FindNode(mHead, str);
+    }
+
+    PRBool FindAndDelete(const char *str)
+    {
+        ipcStringNode *node = FindNodeBefore(mHead, str);
+        if (node) {
+            DeleteAfter(node);
+            return PR_TRUE;
+        }
+        else if (!IsEmpty()) {
+            DeleteFirst();
+            return PR_TRUE;
+        }
+
+        return PR_FALSE;
+    }
+
+private:
+    static NS_HIDDEN_(ipcStringNode *) FindNode      (ipcStringNode *head, const char *str);
+    static NS_HIDDEN_(ipcStringNode *) FindNodeBefore(ipcStringNode *head, const char *str);
+};
+
+#endif // !ipcStringList_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcm.cpp b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcm.cpp
new file mode 100644
index 00000000..7f7ed060
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcm.cpp
@@ -0,0 +1,303 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <string.h>
+#include "ipcm.h"
+#include "pratom.h"
+
+const nsID IPCM_TARGET =
+{ /* 753ca8ff-c8c2-4601-b115-8c2944da1150 */
+    0x753ca8ff,
+    0xc8c2,
+    0x4601,
+    {0xb1, 0x15, 0x8c, 0x29, 0x44, 0xda, 0x11, 0x50}
+};
+
+PRUint32
+IPCM_NewRequestIndex()
+{
+    static PRInt32 sRequestIndex;
+    return (PRUint32) PR_AtomicIncrement(&sRequestIndex);
+}
+
+#if 0
+
+//
+// MSG_TYPE values
+//
+const PRUint32 ipcmMessagePing::MSG_TYPE = IPCM_MSG_TYPE_PING;
+const PRUint32 ipcmMessageError::MSG_TYPE = IPCM_MSG_TYPE_ERROR;
+const PRUint32 ipcmMessageClientHello::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_HELLO;
+const PRUint32 ipcmMessageClientID::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_ID;
+const PRUint32 ipcmMessageClientInfo::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_INFO;
+const PRUint32 ipcmMessageClientAddName::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_ADD_NAME;
+const PRUint32 ipcmMessageClientDelName::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_DEL_NAME;
+const PRUint32 ipcmMessageClientAddTarget::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_ADD_TARGET;
+const PRUint32 ipcmMessageClientDelTarget::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_DEL_TARGET;
+const PRUint32 ipcmMessageQueryClientByName::MSG_TYPE = IPCM_MSG_TYPE_QUERY_CLIENT_BY_NAME;
+const PRUint32 ipcmMessageQueryClientInfo::MSG_TYPE = IPCM_MSG_TYPE_QUERY_CLIENT_INFO;
+const PRUint32 ipcmMessageForward::MSG_TYPE = IPCM_MSG_TYPE_FORWARD;
+const PRUint32 ipcmMessageClientStatus::MSG_TYPE = IPCM_MSG_TYPE_CLIENT_STATUS;
+
+//
+// CLIENT_INFO message
+//
+//  +-----------------------------------------+
+//  | DWORD : MSG_TYPE                        |
+//  +--------------------+--------------------+
+//  | DWORD : clientID                        |
+//  +--------------------+--------------------+
+//  | DWORD : requestIndex                    |
+//  +--------------------+--------------------+
+//  | WORD : nameStart   | WORD : nameCount   |
+//  +--------------------+--------------------+
+//  | WORD : targetStart | WORD : targetCount |
+//  +--------------------+--------------------+
+//  | name[0]            | (null byte)        |
+//  +--------------------+--------------------+
+//  .                    .                    .
+//  .                    .                    .
+//  +--------------------+--------------------+
+//  | name[count - 1]    | (null byte)        |
+//  +--------------------+--------------------+
+//  | target[0]                               |
+//  +-----------------------------------------+
+//  .                    .                    .
+//  .                    .                    .
+//  +-----------------------------------------+
+//  | target[count - 1]                       |
+//  +-----------------------------------------+
+//
+
+struct ipcmClientInfoHeader
+{
+    PRUint32 mType;
+    PRUint32 mID;
+    PRUint32 mRequestIndex;
+    PRUint16 mNameStart;
+    PRUint16 mNameCount;
+    PRUint16 mTargetStart;
+    PRUint16 mTargetCount;
+};
+
+ipcmMessageClientInfo::ipcmMessageClientInfo(PRUint32 cID, PRUint32 rIdx, const char *names[], const nsID *targets[])
+{
+    ipcmClientInfoHeader hdr = {0};
+
+    hdr.mType = MSG_TYPE;
+    hdr.mID = cID;
+    hdr.mRequestIndex = rIdx;
+    hdr.mNameStart = sizeof(hdr);
+
+    PRUint32 i, namesLen = 0;
+
+    i = 0;
+    while (names[i]) {
+        namesLen += (strlen(names[i]) + 1);
+        ++hdr.mNameCount;
+        ++i;
+    }
+
+    i = 0;
+    while (targets[i]) {
+        ++hdr.mTargetCount;
+        ++i;
+    }
+
+    //
+    // compute target array starting offset
+    //
+    hdr.mTargetStart = hdr.mNameStart + namesLen;
+
+    //
+    // compute message length
+    //
+    PRUint32 dataLen = sizeof(hdr) + namesLen + hdr.mTargetCount * sizeof(nsID);
+
+    Init(IPCM_TARGET, NULL, dataLen);
+    
+    //
+    // write message data
+    //
+    SetData(0, (const char *) &hdr, sizeof(hdr));
+
+    PRUint32 offset = sizeof(hdr);
+
+    for (i = 0; names[i]; ++i) {
+        PRUint32 len = strlen(names[i]) + 1;
+        SetData(offset, names[i], len);
+        offset += len;
+    }
+
+    for (i = 0; targets[i]; ++i) {
+        PRUint32 len = sizeof(nsID);
+        SetData(offset, (const char *) targets[i], len);
+        offset += len;
+    }
+}
+
+PRUint32
+ipcmMessageClientInfo::ClientID() const
+{
+    ipcmClientInfoHeader *hdr = (ipcmClientInfoHeader *) Data();
+    return hdr->mID;
+}
+
+PRUint32
+ipcmMessageClientInfo::RequestIndex() const
+{
+    ipcmClientInfoHeader *hdr = (ipcmClientInfoHeader *) Data();
+    return hdr->mRequestIndex;
+}
+
+PRUint32
+ipcmMessageClientInfo::NameCount() const
+{
+    ipcmClientInfoHeader *hdr = (ipcmClientInfoHeader *) Data();
+    return hdr->mNameCount;
+}
+
+PRUint32
+ipcmMessageClientInfo::TargetCount() const
+{
+    ipcmClientInfoHeader *hdr = (ipcmClientInfoHeader *) Data();
+    return hdr->mTargetCount;
+}
+
+const char *
+ipcmMessageClientInfo::NextName(const char *name) const
+{
+    ipcmClientInfoHeader *hdr = (ipcmClientInfoHeader *) Data();
+
+    if (!name)
+        return (const char *) hdr + hdr->mNameStart;
+
+    name += strlen(name) + 1;
+    if (name == (const char *) hdr + hdr->mTargetStart)
+        name = NULL;
+    return name;
+}
+
+const nsID *
+ipcmMessageClientInfo::NextTarget(const nsID *target) const
+{
+    ipcmClientInfoHeader *hdr = (ipcmClientInfoHeader *) Data();
+
+    if (!target)
+        return (const nsID *) (Data() + hdr->mTargetStart);
+
+    if (++target == (const nsID *) (MsgBuf() + MsgLen()))
+        target = NULL;
+    return target;
+}
+#endif
+
+//
+// FORWARD message
+//
+//  +-------------------------+
+//  | DWORD : MSG_TYPE        |
+//  +-------------------------+
+//  | clientID                |
+//  +-------------------------+
+//  | innerMsgHeader          |
+//  +-------------------------+
+//  | innerMsgData            |
+//  +-------------------------+
+//
+
+ipcmMessageForward::ipcmMessageForward(PRUint32 type,
+                                       PRUint32 cID,
+                                       const nsID &target,
+                                       const char *data,
+                                       PRUint32 dataLen)
+{
+    int len = sizeof(ipcmMessageHeader) +  // IPCM header
+              sizeof(cID) +                // cID
+              IPC_MSG_HEADER_SIZE +        // innerMsgHeader
+              dataLen;                     // innerMsgData
+
+    Init(IPCM_TARGET, NULL, len);
+
+    ipcmMessageHeader ipcmHdr =
+        { type, IPCM_NewRequestIndex() };
+
+    SetData(0, (char *) &ipcmHdr, sizeof(ipcmHdr));
+    SetData(sizeof(ipcmHdr), (char *) &cID, sizeof(cID));
+
+    ipcMessageHeader hdr;
+    hdr.mLen = IPC_MSG_HEADER_SIZE + dataLen;
+    hdr.mVersion = IPC_MSG_VERSION;
+    hdr.mFlags = 0;
+    hdr.mTarget = target;
+
+    SetData(sizeof(ipcmHdr) + sizeof(cID), (char *) &hdr, IPC_MSG_HEADER_SIZE);
+    if (data)
+        SetInnerData(0, data, dataLen);
+}
+
+void
+ipcmMessageForward::SetInnerData(PRUint32 offset, const char *data, PRUint32 dataLen)
+{
+    SetData(sizeof(ipcmMessageHeader) + 4 + IPC_MSG_HEADER_SIZE + offset, data, dataLen);
+}
+
+PRUint32
+ipcmMessageForward::ClientID() const
+{
+    return ((PRUint32 *) Data())[2];
+}
+
+const nsID &
+ipcmMessageForward::InnerTarget() const
+{
+    ipcMessageHeader *hdr = (ipcMessageHeader *) (Data() + 12);
+    return hdr->mTarget;
+}
+
+const char *
+ipcmMessageForward::InnerData() const
+{
+    return Data() + 12 + IPC_MSG_HEADER_SIZE;
+}
+
+PRUint32
+ipcmMessageForward::InnerDataLen() const
+{
+    ipcMessageHeader *hdr = (ipcMessageHeader *) (Data() + 12);
+    return hdr->mLen - IPC_MSG_HEADER_SIZE;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcm.h b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcm.h
new file mode 100644
index 00000000..a6445654
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/shared/src/ipcm.h
@@ -0,0 +1,502 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcm_h__
+#define ipcm_h__
+
+#include "ipcMessage.h"
+#include "ipcMessagePrimitives.h"
+
+//-----------------------------------------------------------------------------
+
+//
+// IPCM (IPC Manager) protocol support
+//
+
+// The IPCM message target identifier:
+extern const nsID IPCM_TARGET;
+
+//
+// Every IPCM message has the following structure:
+//
+//  +-----------------------------------------+
+//  | (ipc message header)                    |
+//  +-----------------------------------------+
+//  | DWORD : type                            |
+//  +-----------------------------------------+
+//  | DWORD : requestIndex                    |
+//  +-----------------------------------------+
+//  .                                         .
+//  . (payload)                               .
+//  .                                         .
+//  +-----------------------------------------+
+//
+// where |type| is an integer uniquely identifying the message.  the type is
+// composed of a message class identifier and a message number.  there are 3
+// message classes:
+//
+//   ACK - acknowledging a request
+//   REQ - making a request
+//   PSH - providing unrequested, "pushed" information
+//
+// The requestIndex field is initialized when a request is made.  An
+// acknowledgement's requestIndex is equal to that of its corresponding
+// request message.  This enables the requesting side of the message exchange
+// to match acknowledgements to requests.  The requestIndex field is ignored
+// for PSH messages.
+//
+
+// The IPCM message class is stored in the most significant byte.
+#define IPCM_MSG_CLASS_REQ (1 << 24)
+#define IPCM_MSG_CLASS_ACK (2 << 24)
+#define IPCM_MSG_CLASS_PSH (4 << 24)
+
+// Requests
+#define IPCM_MSG_REQ_PING                   (IPCM_MSG_CLASS_REQ | 1)
+#define IPCM_MSG_REQ_FORWARD                (IPCM_MSG_CLASS_REQ | 2)
+#define IPCM_MSG_REQ_CLIENT_HELLO           (IPCM_MSG_CLASS_REQ | 3)
+#define IPCM_MSG_REQ_CLIENT_ADD_NAME        (IPCM_MSG_CLASS_REQ | 4)
+#define IPCM_MSG_REQ_CLIENT_DEL_NAME        (IPCM_MSG_CLASS_REQ | 5)
+#define IPCM_MSG_REQ_CLIENT_ADD_TARGET      (IPCM_MSG_CLASS_REQ | 6)
+#define IPCM_MSG_REQ_CLIENT_DEL_TARGET      (IPCM_MSG_CLASS_REQ | 7)
+#define IPCM_MSG_REQ_QUERY_CLIENT_BY_NAME   (IPCM_MSG_CLASS_REQ | 8)
+#define IPCM_MSG_REQ_QUERY_CLIENT_NAMES     (IPCM_MSG_CLASS_REQ | 9)  // TODO
+#define IPCM_MSG_REQ_QUERY_CLIENT_TARGETS   (IPCM_MSG_CLASS_REQ | 10) // TODO
+
+// Acknowledgements
+#define IPCM_MSG_ACK_RESULT                 (IPCM_MSG_CLASS_ACK | 1)
+#define IPCM_MSG_ACK_CLIENT_ID              (IPCM_MSG_CLASS_ACK | 2)
+#define IPCM_MSG_ACK_CLIENT_NAMES           (IPCM_MSG_CLASS_ACK | 3)  // TODO
+#define IPCM_MSG_ACK_CLIENT_TARGETS         (IPCM_MSG_CLASS_ACK | 4)  // TODO
+
+// Push messages
+#define IPCM_MSG_PSH_CLIENT_STATE           (IPCM_MSG_CLASS_PSH | 1)
+#define IPCM_MSG_PSH_FORWARD                (IPCM_MSG_CLASS_PSH | 2)
+
+//-----------------------------------------------------------------------------
+
+//
+// IPCM header
+//
+struct ipcmMessageHeader
+{
+    PRUint32 mType;
+    PRUint32 mRequestIndex;
+};
+
+//
+// returns IPCM message type.
+//
+static inline int
+IPCM_GetType(const ipcMessage *msg)
+{
+    return ((const ipcmMessageHeader *) msg->Data())->mType;
+}
+
+//
+// return IPCM message request index.
+//
+static inline PRUint32
+IPCM_GetRequestIndex(const ipcMessage *msg)
+{
+    return ((const ipcmMessageHeader *) msg->Data())->mRequestIndex;
+}
+
+//
+// return a request index that is unique to this process.
+//
+NS_HIDDEN_(PRUint32)
+IPCM_NewRequestIndex();
+
+//-----------------------------------------------------------------------------
+
+//
+// The IPCM protocol is detailed below:
+//
+
+// REQUESTS
+
+//
+// req: IPCM_MSG_REQ_PING
+// ack: IPCM_MSG_ACK_RESULT
+//
+// A PING can be sent from either a client to the daemon, or from the daemon
+// to a client.  The expected acknowledgement is a RESULT message with a status
+// code of 0.
+//
+// This request message has no payload.
+//
+
+//
+// req: IPCM_MSG_REQ_FORWARD
+// ack: IPCM_MSG_ACK_RESULT
+//
+// A FORWARD is sent when a client wishes to send a message to another client.
+// The payload of this message is another message that should be forwarded by
+// the daemon's IPCM to the specified client.  The expected acknowledgment is
+// a RESULT message with a status code indicating success or failure.
+//
+// When the daemon receives a FORWARD message, it creates a PSH_FORWARD message
+// and sends that on to the destination client.
+//
+// This request message has as its payload:
+//
+//  +-----------------------------------------+
+//  | DWORD : clientID                        |
+//  +-----------------------------------------+
+//  | (innerMsgHeader)                        |
+//  +-----------------------------------------+
+//  | (innerMsgData)                          |
+//  +-----------------------------------------+
+//
+
+//
+// req: IPCM_MSG_REQ_CLIENT_HELLO
+// ack: IPCM_MSG_REQ_CLIENT_ID <or> IPCM_MSG_REQ_RESULT
+//
+// A CLIENT_HELLO is sent when a client connects to the IPC daemon.  The
+// expected acknowledgement is a CLIENT_ID message informing the new client of
+// its ClientID.  If for some reason the IPC daemon cannot accept the new
+// client, it returns a RESULT message with a failure status code.
+//
+// This request message has no payload.
+//
+
+//
+// req: IPCM_MSG_REQ_CLIENT_ADD_NAME
+// ack: IPCM_MSG_ACK_RESULT
+//
+// A CLIENT_ADD_NAME is sent when a client wishes to register an additional
+// name for itself.  The expected acknowledgement is a RESULT message with a
+// status code indicating success or failure.
+//
+// This request message has as its payload a null-terminated ASCII character
+// string indicating the name of the client.
+//
+
+//
+// req: IPCM_MSG_REQ_CLIENT_DEL_NAME
+// ack: IPCM_MSG_ACK_RESULT
+//
+// A CLIENT_DEL_NAME is sent when a client wishes to unregister a name that it
+// has registered.  The expected acknowledgement is a RESULT message with a
+// status code indicating success or failure.
+//
+// This request message has as its payload a null-terminated ASCII character
+// string indicating the name of the client.
+//
+
+//
+// req: IPCM_MSG_REQ_CLIENT_ADD_TARGET
+// ack: IPCM_MSG_ACK_RESULT
+//
+// A CLIENT_ADD_TARGET is sent when a client wishes to register an additional
+// target that it supports.  The expected acknowledgement is a RESULT message
+// with a status code indicating success or failure.
+//
+// This request message has as its payload a 128-bit UUID indicating the
+// target to add.
+//
+
+//
+// req: IPCM_MSG_REQ_CLIENT_DEL_TARGET
+// ack: IPCM_MSG_ACK_RESULT
+//
+// A CLIENT_DEL_TARGET is sent when a client wishes to unregister a target
+// that it has registered.  The expected acknowledgement is a RESULT message
+// with a status code indicating success or failure.
+//
+// This request message has as its payload a 128-bit UUID indicating the
+// target to remove.
+//
+
+//
+// req: IPCM_MSG_REQ_QUERY_CLIENT_BY_NAME
+// ack: IPCM_MSG_ACK_CLIENT_ID <or> IPCM_MSG_ACK_RESULT
+//
+// A QUERY_CLIENT_BY_NAME may be sent by a client to discover the client that
+// is known by a common name.  If more than one client matches the name, then
+// only the ID of the more recently registered client is returned.  The
+// expected acknowledgement is a CLIENT_ID message carrying the ID of the
+// corresponding client.  If no client matches the given name or if some error
+// occurs, then a RESULT message with a failure status code is returned.
+//
+// This request message has as its payload a null-terminated ASCII character
+// string indicating the client name to query.
+//
+
+// ACKNOWLEDGEMENTS
+
+//
+// ack: IPCM_MSG_ACK_RESULT
+//
+// This acknowledgement is returned to indicate a success or failure status.
+//
+// The payload consists of a single DWORD value.
+//
+// Possible status codes are listed below (negative values indicate failure
+// codes):
+//
+#define IPCM_OK                      0  // success: generic
+#define IPCM_ERROR_GENERIC          -1  // failure: generic
+#define IPCM_ERROR_NO_CLIENT        -2  // failure: client does not exist
+#define IPCM_ERROR_INVALID_ARG      -3  // failure: invalid request argument
+#define IPCM_ERROR_NO_SUCH_DATA     -4  // failure: requested data does not exist
+#define IPCM_ERROR_ALREADY_EXISTS   -5  // failure: data to set already exists
+
+//
+// ack: IPCM_MSG_ACK_CLIENT_ID
+//
+// This acknowledgement is returned to specify a client ID.
+//
+// The payload consists of a single DWORD value.
+//
+
+// PUSH MESSAGES
+
+//
+// psh: ICPM_MSG_PSH_CLIENT_STATE
+//
+// This message is sent to clients to indicate the status of other clients.
+//
+// The payload consists of:
+//
+//  +-----------------------------------------+
+//  | DWORD : clientID                        |
+//  +-----------------------------------------+
+//  | DWORD : clientState                     |
+//  +-----------------------------------------+
+//
+// where, clientState is one of the following values indicating whether the
+// client has recently connected (up) or disconnected (down):
+//
+#define IPCM_CLIENT_STATE_UP     1
+#define IPCM_CLIENT_STATE_DOWN   2
+
+//
+// psh: IPCM_MSG_PSH_FORWARD
+//
+// This message is sent by the daemon to a client on behalf of another client.
+// The recipient is expected to unpack the contained message and process it.
+//
+// The payload of this message matches the payload of IPCM_MSG_REQ_FORWARD,
+// with the exception that the clientID field is set to the clientID of the
+// sender of the IPCM_MSG_REQ_FORWARD message.
+//
+
+//-----------------------------------------------------------------------------
+
+//
+// NOTE: This file declares some helper classes that simplify constructing
+//       and parsing IPCM messages.  Each class subclasses ipcMessage, but
+//       adds no additional member variables.  |operator new| should be used
+//       to allocate one of the IPCM helper classes, e.g.:
+//
+//          ipcMessage *msg = new ipcmMessageClientHello("foo");
+//
+//       Given an arbitrary ipcMessage, it can be parsed using logic similar
+//       to the following:
+//
+//          void func(const ipcMessage *unknown)
+//          {
+//            if (unknown->Topic().Equals(IPCM_TARGET)) {
+//              if (IPCM_GetMsgType(unknown) == IPCM_MSG_TYPE_CLIENT_ID) {
+//                ipcMessageCast<ipcmMessageClientID> msg(unknown);
+//                printf("Client ID: %u\n", msg->ClientID());
+//              }
+//            }
+//          }
+//
+
+// REQUESTS
+
+class ipcmMessagePing : public ipcMessage_DWORD_DWORD
+{
+public:
+    ipcmMessagePing()
+        : ipcMessage_DWORD_DWORD(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_PING,
+            IPCM_NewRequestIndex()) {}
+};
+
+class ipcmMessageForward : public ipcMessage
+{
+public:
+    // @param type        the type of this message: IPCM_MSG_{REQ,PSH}_FORWARD
+    // @param clientID    the client id of the sender or receiver
+    // @param target      the message target
+    // @param data        the message data
+    // @param dataLen     the message data length
+    ipcmMessageForward(PRUint32 type,
+                       PRUint32 clientID,
+                       const nsID &target,
+                       const char *data,
+                       PRUint32 dataLen) NS_HIDDEN;
+
+    // set inner message data, constrained to the data length passed
+    // to this class's constructor.
+    NS_HIDDEN_(void) SetInnerData(PRUint32 offset, const char *data, PRUint32 dataLen);
+
+    NS_HIDDEN_(PRUint32)     ClientID() const;
+    NS_HIDDEN_(const nsID &) InnerTarget() const;
+    NS_HIDDEN_(const char *) InnerData() const;
+    NS_HIDDEN_(PRUint32)     InnerDataLen() const;
+};
+
+class ipcmMessageClientHello : public ipcMessage_DWORD_DWORD
+{
+public:
+    ipcmMessageClientHello()
+        : ipcMessage_DWORD_DWORD(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_CLIENT_HELLO,
+            IPCM_NewRequestIndex()) {}
+};
+
+class ipcmMessageClientAddName : public ipcMessage_DWORD_DWORD_STR
+{
+public:
+    ipcmMessageClientAddName(const char *name)
+        : ipcMessage_DWORD_DWORD_STR(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_CLIENT_ADD_NAME,
+            IPCM_NewRequestIndex(),
+            name) {}
+
+    const char *Name() const { return Third(); }
+};
+
+class ipcmMessageClientDelName : public ipcMessage_DWORD_DWORD_STR
+{
+public:
+    ipcmMessageClientDelName(const char *name)
+        : ipcMessage_DWORD_DWORD_STR(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_CLIENT_DEL_NAME,
+            IPCM_NewRequestIndex(),
+            name) {}
+
+    const char *Name() const { return Third(); }
+};
+
+class ipcmMessageClientAddTarget : public ipcMessage_DWORD_DWORD_ID
+{
+public:
+    ipcmMessageClientAddTarget(const nsID &target)
+        : ipcMessage_DWORD_DWORD_ID(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_CLIENT_ADD_TARGET,
+            IPCM_NewRequestIndex(),
+            target) {}
+
+    const nsID &Target() const { return Third(); }
+};
+
+class ipcmMessageClientDelTarget : public ipcMessage_DWORD_DWORD_ID
+{
+public:
+    ipcmMessageClientDelTarget(const nsID &target)
+        : ipcMessage_DWORD_DWORD_ID(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_CLIENT_ADD_TARGET,
+            IPCM_NewRequestIndex(),
+            target) {}
+
+    const nsID &Target() const { return Third(); }
+};
+
+class ipcmMessageQueryClientByName : public ipcMessage_DWORD_DWORD_STR
+{
+public:
+    ipcmMessageQueryClientByName(const char *name)
+        : ipcMessage_DWORD_DWORD_STR(
+            IPCM_TARGET,
+            IPCM_MSG_REQ_QUERY_CLIENT_BY_NAME,
+            IPCM_NewRequestIndex(),
+            name) {}
+
+    const char *Name() const { return Third(); }
+    PRUint32 RequestIndex() const { return Second(); }
+};
+
+// ACKNOWLEDGEMENTS
+
+class ipcmMessageResult : public ipcMessage_DWORD_DWORD_DWORD
+{
+public:
+    ipcmMessageResult(PRUint32 requestIndex, PRInt32 status)
+        : ipcMessage_DWORD_DWORD_DWORD(
+            IPCM_TARGET,
+            IPCM_MSG_ACK_RESULT,
+            requestIndex,
+            (PRUint32) status) {}
+
+    PRInt32 Status() const { return (PRInt32) Third(); }
+};
+
+class ipcmMessageClientID : public ipcMessage_DWORD_DWORD_DWORD
+{
+public:
+    ipcmMessageClientID(PRUint32 requestIndex, PRUint32 clientID)
+        : ipcMessage_DWORD_DWORD_DWORD(
+            IPCM_TARGET,
+            IPCM_MSG_ACK_CLIENT_ID,
+            requestIndex,
+            clientID) {}
+
+    PRUint32 ClientID() const { return Third(); }
+};
+
+// PUSH MESSAGES
+
+class ipcmMessageClientState : public ipcMessage_DWORD_DWORD_DWORD_DWORD
+{
+public:
+    ipcmMessageClientState(PRUint32 clientID, PRUint32 clientStatus)
+        : ipcMessage_DWORD_DWORD_DWORD_DWORD(
+            IPCM_TARGET,
+            IPCM_MSG_PSH_CLIENT_STATE,
+            0,
+            clientID,
+            clientStatus) {}
+
+    PRUint32 ClientID() const { return Third(); }
+    PRUint32 ClientState() const { return Fourth(); }
+};
+
+#endif // !ipcm_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/test/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/test/.cvsignore
new file mode 100644
index 00000000..d1a44d27
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/test/.cvsignore
@@ -0,0 +1,2 @@
+Makefile
+TestIPC
diff --git a/src/libs/xpcom18a4/ipc/ipcd/test/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/test/Makefile.in
new file mode 100644
index 00000000..bad636f3
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/test/Makefile.in
@@ -0,0 +1,69 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+DIRS		= module
+
+MODULE		= ipcd_test
+REQUIRES	= \
+			xpcom \
+			string \
+			ipcd \
+			$(NULL)
+
+CPPSRCS		= \
+			TestIPC.cpp \
+			$(NULL)
+
+SIMPLE_PROGRAMS	= $(CPPSRCS:.cpp=$(BIN_SUFFIX))
+
+include $(topsrcdir)/config/config.mk
+
+LIBS		= \
+			$(EXTRA_DSO_LIBS) \
+			$(XPCOM_LIBS) \
+			$(NSPR_LIBS) \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/test/TestIPC.cpp b/src/libs/xpcom18a4/ipc/ipcd/test/TestIPC.cpp
new file mode 100644
index 00000000..1100d674
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/test/TestIPC.cpp
@@ -0,0 +1,338 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Darin Fisher <darin@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcIService.h"
+#include "ipcIMessageObserver.h"
+#include "ipcILockService.h"
+#include "ipcCID.h"
+#include "ipcLockCID.h"
+
+#include "nsIEventQueueService.h"
+#include "nsIServiceManager.h"
+#include "nsIComponentRegistrar.h"
+
+#include "nsString.h"
+#include "prmem.h"
+
+static const nsID kIPCMTargetID =
+{ /* 753ca8ff-c8c2-4601-b115-8c2944da1150 */
+    0x753ca8ff,
+    0xc8c2,
+    0x4601,
+    {0xb1, 0x15, 0x8c, 0x29, 0x44, 0xda, 0x11, 0x50}
+};
+
+static const nsID kTestTargetID =
+{ /* e628fc6e-a6a7-48c7-adba-f241d1128fb8 */
+    0xe628fc6e,
+    0xa6a7,
+    0x48c7,
+    {0xad, 0xba, 0xf2, 0x41, 0xd1, 0x12, 0x8f, 0xb8}
+};
+
+#define RETURN_IF_FAILED(rv, step) \
+    PR_BEGIN_MACRO \
+    if (NS_FAILED(rv)) { \
+        printf("*** %s failed: rv=%x\n", step, rv); \
+        return rv;\
+    } \
+    PR_END_MACRO
+
+static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
+static nsIEventQueue* gEventQ = nsnull;
+static PRBool gKeepRunning = PR_TRUE;
+static ipcIService *gIpcServ = nsnull;
+static ipcILockService *gIpcLockServ = nsnull;
+
+static void
+SendMsg(ipcIService *ipc, PRUint32 cID, const nsID &target, const char *data, PRUint32 dataLen, PRBool sync = PR_FALSE)
+{
+    printf("*** sending message: [to-client=%u dataLen=%u]\n", cID, dataLen);
+
+    nsresult rv;
+
+    rv = ipc->SendMessage(cID, target, (const PRUint8 *) data, dataLen);
+    if (NS_FAILED(rv)) {
+        printf("*** sending message failed: rv=%x\n", rv);
+        return;
+    }
+
+    if (sync) {
+        rv = ipc->WaitMessage(cID, target, nsnull, PR_UINT32_MAX);
+        if (NS_FAILED(rv))
+            printf("*** waiting for message failed: rv=%x\n", rv);
+    }
+}
+
+//-----------------------------------------------------------------------------
+
+class myIpcMessageObserver : public ipcIMessageObserver
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_IPCIMESSAGEOBSERVER
+};
+NS_IMPL_ISUPPORTS1(myIpcMessageObserver, ipcIMessageObserver)
+
+NS_IMETHODIMP
+myIpcMessageObserver::OnMessageAvailable(PRUint32 sender, const nsID &target, const PRUint8 *data, PRUint32 dataLen)
+{
+    printf("*** got message: [sender=%u data=%s]\n", sender, (const char *) data);
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+
+#if 0
+class myIpcClientQueryHandler : public ipcIClientQueryHandler
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_IPCICLIENTQUERYHANDLER
+};
+
+NS_IMPL_ISUPPORTS1(myIpcClientQueryHandler, ipcIClientQueryHandler)
+
+NS_IMETHODIMP
+myIpcClientQueryHandler::OnQueryComplete(PRUint32 aQueryID,
+                                         nsresult aStatus,
+                                         PRUint32 aClientID,
+                                         const char **aNames,
+                                         PRUint32 aNameCount,
+                                         const nsID **aTargets,
+                                         PRUint32 aTargetCount)
+{
+    printf("*** query complete [queryID=%u status=0x%x clientID=%u]\n",
+            aQueryID, aStatus, aClientID);
+
+    PRUint32 i;
+    printf("***  names:\n");
+    for (i = 0; i < aNameCount; ++i)
+        printf("***    %d={%s}\n", i, aNames[i]);
+    printf("***  targets:\n");
+    for (i = 0; i < aTargetCount; ++i) {
+        const char *trailer;
+        if (aTargets[i]->Equals(kTestTargetID))
+            trailer = " (TEST_TARGET_ID)";
+        else if (aTargets[i]->Equals(kIPCMTargetID))
+            trailer = " (IPCM_TARGET_ID)";
+        else
+            trailer = " (unknown)";
+        char *str = aTargets[i]->ToString();
+        printf("***    %d=%s%s\n", i, str, trailer);
+        PR_Free(str);
+    }
+
+    if (aClientID != 0) {
+        const char hello[] = "hello friend!";
+        SendMsg(gIpcServ, aClientID, kTestTargetID, hello, sizeof(hello));
+    }
+
+    return NS_OK;
+}
+#endif
+
+//-----------------------------------------------------------------------------
+
+#if 0
+class myIpcLockNotify : public ipcILockNotify
+{
+public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_IPCILOCKNOTIFY
+};
+
+NS_IMPL_ISUPPORTS1(myIpcLockNotify, ipcILockNotify)
+
+NS_IMETHODIMP
+myIpcLockNotify::OnAcquireLockComplete(const char *lockName, nsresult status)
+{
+    printf("*** OnAcquireLockComplete [lock=%s status=%x]\n", lockName, status);
+    gIpcLockServ->ReleaseLock(lockName);
+    return NS_OK;
+}
+#endif
+
+//-----------------------------------------------------------------------------
+
+int main(int argc, char **argv)
+{
+    nsresult rv;
+
+    {
+        nsCOMPtr<nsIServiceManager> servMan;
+        NS_InitXPCOM2(getter_AddRefs(servMan), nsnull, nsnull);
+        nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(servMan);
+        NS_ASSERTION(registrar, "Null nsIComponentRegistrar");
+        if (registrar)
+            registrar->AutoRegister(nsnull);
+
+        // Create the Event Queue for this thread...
+        nsCOMPtr<nsIEventQueueService> eqs =
+                 do_GetService(kEventQueueServiceCID, &rv);
+        RETURN_IF_FAILED(rv, "do_GetService(EventQueueService)");
+
+        rv = eqs->CreateMonitoredThreadEventQueue();
+        RETURN_IF_FAILED(rv, "CreateMonitoredThreadEventQueue");
+
+        rv = eqs->GetThreadEventQueue(NS_CURRENT_THREAD, &gEventQ);
+        RETURN_IF_FAILED(rv, "GetThreadEventQueue");
+
+        printf("*** getting ipc service\n");
+        nsCOMPtr<ipcIService> ipcServ(do_GetService(IPC_SERVICE_CONTRACTID, &rv));
+        RETURN_IF_FAILED(rv, "do_GetService(ipcServ)");
+        NS_ADDREF(gIpcServ = ipcServ);
+
+        if (argc > 1) {
+            printf("*** using client name [%s]\n", argv[1]);
+            gIpcServ->AddName(argv[1]);
+        }
+
+        ipcServ->DefineTarget(kTestTargetID, new myIpcMessageObserver(), PR_TRUE);
+
+        const char data[] =
+                "01 this is a really long message.\n"
+                "02 this is a really long message.\n"
+                "03 this is a really long message.\n"
+                "04 this is a really long message.\n"
+                "05 this is a really long message.\n"
+                "06 this is a really long message.\n"
+                "07 this is a really long message.\n"
+                "08 this is a really long message.\n"
+                "09 this is a really long message.\n"
+                "10 this is a really long message.\n"
+                "11 this is a really long message.\n"
+                "12 this is a really long message.\n"
+                "13 this is a really long message.\n"
+                "14 this is a really long message.\n"
+                "15 this is a really long message.\n"
+                "16 this is a really long message.\n"
+                "17 this is a really long message.\n"
+                "18 this is a really long message.\n"
+                "19 this is a really long message.\n"
+                "20 this is a really long message.\n"
+                "21 this is a really long message.\n"
+                "22 this is a really long message.\n"
+                "23 this is a really long message.\n"
+                "24 this is a really long message.\n"
+                "25 this is a really long message.\n"
+                "26 this is a really long message.\n"
+                "27 this is a really long message.\n"
+                "28 this is a really long message.\n"
+                "29 this is a really long message.\n"
+                "30 this is a really long message.\n"
+                "31 this is a really long message.\n"
+                "32 this is a really long message.\n"
+                "33 this is a really long message.\n"
+                "34 this is a really long message.\n"
+                "35 this is a really long message.\n"
+                "36 this is a really long message.\n"
+                "37 this is a really long message.\n"
+                "38 this is a really long message.\n"
+                "39 this is a really long message.\n"
+                "40 this is a really long message.\n"
+                "41 this is a really long message.\n"
+                "42 this is a really long message.\n"
+                "43 this is a really long message.\n"
+                "44 this is a really long message.\n"
+                "45 this is a really long message.\n"
+                "46 this is a really long message.\n"
+                "47 this is a really long message.\n"
+                "48 this is a really long message.\n"
+                "49 this is a really long message.\n"
+                "50 this is a really long message.\n"
+                "51 this is a really long message.\n"
+                "52 this is a really long message.\n"
+                "53 this is a really long message.\n"
+                "54 this is a really long message.\n"
+                "55 this is a really long message.\n"
+                "56 this is a really long message.\n"
+                "57 this is a really long message.\n"
+                "58 this is a really long message.\n"
+                "59 this is a really long message.\n"
+                "60 this is a really long message.\n";
+        SendMsg(ipcServ, 0, kTestTargetID, data, sizeof(data), PR_TRUE);
+
+//        PRUint32 queryID;
+//        nsCOMPtr<ipcIClientQueryHandler> handler(new myIpcClientQueryHandler());
+//        ipcServ->QueryClientByName("foopy", handler, PR_FALSE, &queryID);
+
+        PRUint32 foopyID;
+        nsresult foopyRv = ipcServ->ResolveClientName("foopy", &foopyID);
+        printf("*** query for 'foopy' returned [rv=%x id=%u]\n", foopyRv, foopyID);
+
+        if (NS_SUCCEEDED(foopyRv)) {
+            const char hello[] = "hello friend!";
+            SendMsg(ipcServ, foopyID, kTestTargetID, hello, sizeof(hello));
+        }
+
+        //
+        // test lock service
+        //
+        nsCOMPtr<ipcILockService> lockService = do_GetService(IPC_LOCKSERVICE_CONTRACTID, &rv);
+        RETURN_IF_FAILED(rv, "do_GetService(ipcLockServ)");
+        NS_ADDREF(gIpcLockServ = lockService);
+
+        //nsCOMPtr<ipcILockNotify> notify(new myIpcLockNotify());
+        gIpcLockServ->AcquireLock("blah", PR_TRUE);
+
+        rv = gIpcLockServ->AcquireLock("foo", PR_TRUE);
+        printf("*** sync AcquireLock returned [rv=%x]\n", rv);
+
+        PLEvent *ev;
+        while (gKeepRunning) {
+            gEventQ->WaitForEvent(&ev);
+            gEventQ->HandleEvent(ev);
+        }
+
+        NS_RELEASE(gIpcServ);
+
+        printf("*** processing remaining events\n");
+
+        // process any remaining events
+        while (NS_SUCCEEDED(gEventQ->GetEvent(&ev)) && ev)
+            gEventQ->HandleEvent(ev);
+
+        printf("*** done\n");
+    } // this scopes the nsCOMPtrs
+
+    // no nsCOMPtrs are allowed to be alive when you call NS_ShutdownXPCOM
+    rv = NS_ShutdownXPCOM(nsnull);
+    NS_ASSERTION(NS_SUCCEEDED(rv), "NS_ShutdownXPCOM failed");
+
+    return 0;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/test/module/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/test/module/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/test/module/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/test/module/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/test/module/Makefile.in
new file mode 100644
index 00000000..aec7c169
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/test/module/Makefile.in
@@ -0,0 +1,81 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2002
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Darin Fisher <darin@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE			= ipcd_test
+LIBRARY_NAME	= testmodule
+SHORT_LIBNAME	= testmod
+MODULE_NAME		= ipcd_test
+
+FORCE_SHARED_LIB	= 1
+NO_DIST_INSTALL	= 1
+
+REQUIRES	= \
+			xpcom \
+			ipcd \
+			$(NULL)
+
+CPPSRCS		= TestModule.cpp
+
+LOCAL_INCLUDES	= \
+			-I$(srcdir)/../common \
+			$(NULL)
+
+EXTRA_DSO_LDOPTS = \
+			$(LIBS_DIR) \
+			$(NSPR_LIBS) \
+			$(EXTRA_DSO_LIBS) \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
+
+_IPC_FILES = \
+    $(DLL_PREFIX)$(LIBRARY_NAME)$(DLL_SUFFIX) \
+    $(NULL)
+
+libs:: $(_IPC_FILES)
+	$(INSTALL) $^ $(DIST)/bin/ipc/modules
+
+install:: $(_IPC_FILES)
+	$(SYSINSTALL) $(IFLAGS1) $^ $(DESTDIR)$(mozappdir)/ipc/modules
diff --git a/src/libs/xpcom18a4/ipc/ipcd/test/module/TestModule.cpp b/src/libs/xpcom18a4/ipc/ipcd/test/module/TestModule.cpp
new file mode 100644
index 00000000..fbd78867
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/test/module/TestModule.cpp
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include "ipcModuleUtil.h"
+
+#define TEST_MODULE_ID                                \
+{ /* e628fc6e-a6a7-48c7-adba-f241d1128fb8 */          \
+    0xe628fc6e,                                       \
+    0xa6a7,                                           \
+    0x48c7,                                           \
+    {0xad, 0xba, 0xf2, 0x41, 0xd1, 0x12, 0x8f, 0xb8}  \
+}
+static const nsID kTestModuleID = TEST_MODULE_ID;
+
+struct TestModule
+{
+    static void Init()
+    {
+        printf("*** TestModule::Init\n");
+    }
+
+    static void Shutdown()
+    {
+        printf("*** TestModule::Shutdown\n");
+    }
+
+    static void HandleMsg(ipcClientHandle client,
+                          const nsID     &target,
+                          const void     *data,
+                          PRUint32        dataLen)
+    {
+        printf("*** TestModule::HandleMsg [%s]\n", (const char *) data);
+
+        static const char buf[] = "pong";
+        IPC_SendMsg(client, kTestModuleID, buf, sizeof(buf));
+    }
+
+    static void ClientUp(ipcClientHandle client)
+    {
+        printf("*** TestModule::ClientUp [%u]\n", IPC_GetClientID(client));
+    }
+
+    static void ClientDown(ipcClientHandle client)
+    {
+        printf("*** TestModule::ClientDown [%u]\n", IPC_GetClientID(client));
+    }
+};
+
+static ipcModuleMethods gTestMethods =
+{
+    IPC_MODULE_METHODS_VERSION,
+    TestModule::Init,
+    TestModule::Shutdown,
+    TestModule::HandleMsg,
+    TestModule::ClientUp,
+    TestModule::ClientDown
+};
+
+static ipcModuleEntry gTestModuleEntry[] =
+{
+    { TEST_MODULE_ID, &gTestMethods }
+};
+
+IPC_IMPL_GETMODULES(TestModule, gTestModuleEntry)
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/util/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/util/Makefile.in
new file mode 100644
index 00000000..323f87f8
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/Makefile.in
@@ -0,0 +1,49 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Conrad Carlen <ccarlen@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+DIRS        = public src
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/public/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/util/public/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/public/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/public/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/util/public/Makefile.in
new file mode 100644
index 00000000..84d980c4
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/public/Makefile.in
@@ -0,0 +1,53 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Conrad Carlen <ccarlen@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE		= ipcd
+
+EXPORTS		= \
+			ipcMessageReader.h \
+			ipcMessageWriter.h \
+			$(NULL)
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/public/ipcMessageReader.h b/src/libs/xpcom18a4/ipc/ipcd/util/public/ipcMessageReader.h
new file mode 100644
index 00000000..f93bfa20
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/public/ipcMessageReader.h
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Conrad Carlen <ccarlen@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcMessageReader_h__
+#define ipcMessageReader_h__
+
+#include "prtypes.h"
+
+//*****************************************************************************
+// ipcMessageReader
+//
+// Reads from a const buffer supplied to it. Does not take ownership of the
+// buffer. Bytes are read in native endianess, as ipcMessageWriter writes them
+// in native endianess.
+//*****************************************************************************   
+
+class ipcMessageReader
+{
+public:
+                  ipcMessageReader(const PRUint8* inBuffer, PRUint32 bufferSize) :
+                    mBuf(inBuffer), mBufEnd(inBuffer + bufferSize),
+                    mBufPtr(mBuf),
+                    mError(PR_FALSE)
+                  { }
+                  
+                  ~ipcMessageReader()
+                  { }
+
+                  // Returns PR_TRUE if an error has occured at any point
+                  // during the lifetime of this object. Any read operation
+                  // will safely return 0 on an error condition.
+  PRBool          HasError()
+                  { return mError; }
+  
+  PRUint8         GetInt8();
+  PRUint16        GetInt16();
+  PRUint32        GetInt32();
+  PRInt32         GetBytes(void* destBuffer, PRInt32 n);
+  
+                  // Returns data at the current read position.
+  const PRUint8*  GetPtr()
+                  { return mBufPtr; }
+
+                  // Returns PR_TRUE if the new position is within the buffer.
+                  // Returns PR_FALSE and sets error state if not.
+  PRBool          AdvancePtr(PRInt32 n);
+      
+private:
+  const PRUint8   *mBuf, *mBufEnd;
+  const PRUint8   *mBufPtr;
+  PRBool          mError;
+};
+
+#endif // ipcMessageReader_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/public/ipcMessageWriter.h b/src/libs/xpcom18a4/ipc/ipcd/util/public/ipcMessageWriter.h
new file mode 100644
index 00000000..8e0a8178
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/public/ipcMessageWriter.h
@@ -0,0 +1,99 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Conrad Carlen <ccarlen@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef ipcMessageWriter_h__
+#define ipcMessageWriter_h__
+
+#include "prtypes.h"
+
+//*****************************************************************************
+// ipcMessageWriter
+//
+// Creates a block of memory and resizes it in order to hold writes. The
+// block will be freed when this object is destroyed. Bytes are written in
+// native endianess, as ipcMessageReader reads them in native endianess.
+//*****************************************************************************   
+
+class ipcMessageWriter
+{
+public:
+                  ipcMessageWriter(PRUint32 initialCapacity) :
+                    mBuf(NULL),
+                    mBufPtr(NULL), mBufEnd(NULL),
+                    mCapacity(0),
+                    mError(PR_FALSE)
+                  {
+                    EnsureCapacity(initialCapacity);
+                  }
+                  
+                  ~ipcMessageWriter();
+
+                  // Returns PR_TRUE if an error has occured at any point
+                  // during the lifetime of this object, due to the buffer
+                  // not being able to be grown to the required size.
+  PRBool          HasError()
+                  { return mError; }
+
+  void            PutInt8(PRUint8 val);
+  void            PutInt16(PRUint16 val);
+  void            PutInt32(PRUint32 val);  
+  PRUint32        PutBytes(const void* src, PRUint32 n);
+
+                  // Returns the beginning of the buffer. Do not free this.
+  PRUint8*        GetBuffer()
+                  { return mBuf; }
+
+  PRInt32         GetSize()
+                  { return mBufPtr - mBuf; }
+
+private:
+  PRBool          EnsureCapacity(PRInt32 sizeNeeded)
+                  {
+                    return (mBuf && ((mBufPtr + sizeNeeded) <= mBufEnd)) ?
+                      PR_TRUE : GrowCapacity(sizeNeeded);
+                  }
+  PRBool          GrowCapacity(PRInt32 sizeNeeded);
+
+private:
+  PRUint8         *mBuf;
+  PRUint8         *mBufPtr, *mBufEnd;
+  PRInt32         mCapacity;
+  PRBool          mError;
+};
+
+#endif // ipcMessageWriter_h__
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/src/.cvsignore b/src/libs/xpcom18a4/ipc/ipcd/util/src/.cvsignore
new file mode 100644
index 00000000..f3c7a7c5
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/src/.cvsignore
@@ -0,0 +1 @@
+Makefile
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/src/Makefile.in b/src/libs/xpcom18a4/ipc/ipcd/util/src/Makefile.in
new file mode 100644
index 00000000..6ebca736
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/src/Makefile.in
@@ -0,0 +1,56 @@
+# vim: noexpandtab ts=4 sw=4
+# ***** BEGIN LICENSE BLOCK *****
+# Version: MPL 1.1/GPL 2.0/LGPL 2.1
+#
+# The contents of this file are subject to the Mozilla Public License Version
+# 1.1 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+# http://www.mozilla.org/MPL/
+#
+# Software distributed under the License is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+# for the specific language governing rights and limitations under the
+# License.
+#
+# The Original Code is Mozilla IPC.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2003
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Conrad Carlen <ccarlen@netscape.com>
+#
+# Alternatively, the contents of this file may be used under the terms of
+# either the GNU General Public License Version 2 or later (the "GPL"), or
+# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+# in which case the provisions of the GPL or the LGPL are applicable instead
+# of those above. If you wish to allow use of your version of this file only
+# under the terms of either the GPL or the LGPL, and not to allow others to
+# use your version of this file under the terms of the MPL, indicate your
+# decision by deleting the provisions above and replace them with the notice
+# and other provisions required by the GPL or the LGPL. If you do not delete
+# the provisions above, a recipient may use your version of this file under
+# the terms of any one of the MPL, the GPL or the LGPL.
+#
+# ***** END LICENSE BLOCK *****
+
+DEPTH		= ../../../..
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MODULE				= ipcd
+LIBRARY_NAME		= ipcdutil_s
+FORCE_STATIC_LIB 	= 1
+MODULE_NAME			= ipcd
+
+
+CPPSRCS		= \
+			ipcMessageReader.cpp \
+			ipcMessageWriter.cpp
+
+include $(topsrcdir)/config/rules.mk
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/src/ipcMessageReader.cpp b/src/libs/xpcom18a4/ipc/ipcd/util/src/ipcMessageReader.cpp
new file mode 100644
index 00000000..87279df2
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/src/ipcMessageReader.cpp
@@ -0,0 +1,100 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Conrad Carlen <ccarlen@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcMessageReader.h"
+#include <string.h>
+
+//*****************************************************************************
+// ipcMessageReader
+//*****************************************************************************   
+
+PRUint8 ipcMessageReader::GetInt8()
+{
+  if (mBufPtr < mBufEnd)
+    return *mBufPtr++;
+  mError = PR_TRUE;
+  return 0;
+}
+
+// GetInt16 and GetInt32 go to pains to avoid unaligned memory accesses that
+// are larger than a byte. On some platforms, that causes a performance penalty.
+// On other platforms, Tru64 for instance, it's an error.
+
+PRUint16 ipcMessageReader::GetInt16()
+{
+  if (mBufPtr + sizeof(PRUint16) <= mBufEnd) {
+    PRUint8 temp[2] = { mBufPtr[0], mBufPtr[1] };
+    mBufPtr += sizeof(PRUint16);
+    return *(PRUint16*)temp;
+  }
+  mError = PR_TRUE;
+  return 0;
+}
+
+PRUint32 ipcMessageReader::GetInt32()
+{
+  if (mBufPtr + sizeof(PRUint32) <= mBufEnd) {
+    PRUint8 temp[4] = { mBufPtr[0], mBufPtr[1], mBufPtr[2], mBufPtr[3] };
+    mBufPtr += sizeof(PRUint32);
+    return *(PRUint32*)temp;
+  }
+  mError = PR_TRUE;
+  return 0;
+}
+
+PRInt32 ipcMessageReader::GetBytes(void* destBuffer, PRInt32 n)
+{
+  if (mBufPtr + n <= mBufEnd) {
+    memcpy(destBuffer, mBufPtr, n);
+    mBufPtr += n;
+    return n;
+  }
+  mError = PR_TRUE;
+  return 0;
+}
+
+PRBool ipcMessageReader::AdvancePtr(PRInt32 n)
+{
+  const PRUint8 *newPtr = mBufPtr + n;
+  if (newPtr >= mBuf && newPtr <= mBufEnd) {
+    mBufPtr = newPtr;
+    return PR_TRUE;
+  }
+  mError = PR_TRUE;
+  return PR_FALSE;
+}
diff --git a/src/libs/xpcom18a4/ipc/ipcd/util/src/ipcMessageWriter.cpp b/src/libs/xpcom18a4/ipc/ipcd/util/src/ipcMessageWriter.cpp
new file mode 100644
index 00000000..4af0dcba
--- /dev/null
+++ b/src/libs/xpcom18a4/ipc/ipcd/util/src/ipcMessageWriter.cpp
@@ -0,0 +1,130 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla IPC.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2003
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Conrad Carlen <ccarlen@netscape.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "ipcMessageWriter.h"
+#include "prmem.h"
+#include <string.h>
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+# include <iprt/mem.h>
+#endif
+
+//*****************************************************************************
+// ipcMessageWriter
+//*****************************************************************************
+
+ipcMessageWriter::~ipcMessageWriter()
+{
+  if (mBuf)
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+    RTMemFree(mBuf);
+#else
+    free(mBuf);
+#endif
+}
+
+void ipcMessageWriter::PutInt8(PRUint8 val)
+{
+  if (EnsureCapacity(sizeof(PRUint8)))
+    *mBufPtr++ = val;
+}
+
+// PutInt16 and PutInt32 go to pains to avoid unaligned memory accesses that
+// are larger than a byte. On some platforms, that causes a performance penalty.
+// On other platforms, Tru64 for instance, it's an error.
+
+void ipcMessageWriter::PutInt16(PRUint16 val)
+{
+  if (EnsureCapacity(sizeof(PRUint16))) {
+    PRUint8 temp[2];
+    *(PRUint16*)temp = val;
+    *mBufPtr++ = temp[0];
+    *mBufPtr++ = temp[1];
+  }
+}
+
+void ipcMessageWriter::PutInt32(PRUint32 val)
+{
+  if (EnsureCapacity(sizeof(PRUint32))) {
+    PRUint8 temp[4];
+    *(PRUint32*)temp = val;
+    *mBufPtr++ = temp[0];
+    *mBufPtr++ = temp[1];
+    *mBufPtr++ = temp[2];
+    *mBufPtr++ = temp[3];
+  }
+}
+
+PRUint32 ipcMessageWriter::PutBytes(const void* src, PRUint32 n)
+{
+  if (EnsureCapacity(n)) {
+    memcpy(mBufPtr, src, n);
+    mBufPtr += n;
+    return n;
+  }
+  return 0;
+}
+
+PRBool ipcMessageWriter::GrowCapacity(PRInt32 sizeNeeded)
+{
+  if (sizeNeeded < 0)
+    return PR_FALSE;
+  PRInt32 newCapacity = (mBufPtr - mBuf) + sizeNeeded;
+  if (mCapacity == 0)
+    mCapacity = newCapacity;
+  else
+  {
+    while (newCapacity > mCapacity && (mCapacity << 1) > 0)
+      mCapacity <<= 1;
+    if (newCapacity > mCapacity) // if we broke out because of rollover
+      return PR_FALSE;
+  }
+
+  PRInt32 curPos = mBufPtr - mBuf;
+#ifdef VBOX_USE_IPRT_IN_XPCOM
+  mBuf = (PRUint8*)RTMemRealloc(mBuf, mCapacity);
+#else
+  mBuf = (PRUint8*)realloc(mBuf, mCapacity);
+#endif
+  if (!mBuf) {
+    mError = PR_TRUE;
+    return PR_FALSE;
+  }
+  mBufPtr = mBuf + curPos;
+  mBufEnd = mBuf + mCapacity;
+  return PR_TRUE;
+}