1 files changed, 89 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/threads/nsEventQueue.h b/src/libs/xpcom18a4/xpcom/threads/nsEventQueue.h
new file mode 100644
index 00000000..51f33e47
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/threads/nsEventQueue.h
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** 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 Communicator client code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Pierre Phaneuf <pp@ludusdesign.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of 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 "prmon.h"
+#include "nsIEventQueue.h"
+#include "nsPIEventQueueChain.h"
+
+class nsEventQueueImpl : public nsIEventQueue,
+                         public nsPIEventQueueChain
+{
+public:
+    nsEventQueueImpl();
+
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSIEVENTTARGET
+    NS_DECL_NSIEVENTQUEUE
+
+    // Helpers
+    static NS_METHOD Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr);
+
+    static const nsCID& CID() { static nsCID cid = NS_EVENTQUEUE_CID; return cid; }
+
+    // nsPIEventQueueChain interface
+    NS_IMETHOD AppendQueue(nsIEventQueue *aQueue);
+    NS_IMETHOD Unlink();
+    NS_IMETHOD GetYoungest(nsIEventQueue **aQueue);
+    NS_IMETHOD GetYoungestActive(nsIEventQueue **aQueue);
+    NS_IMETHOD SetYounger(nsPIEventQueueChain *aQueue);
+    NS_IMETHOD GetYounger(nsIEventQueue **aQueue);
+    NS_IMETHOD SetElder(nsPIEventQueueChain *aQueue);
+    NS_IMETHOD GetElder(nsIEventQueue **aQueue);
+
+private:
+    ~nsEventQueueImpl();
+
+  PLEventQueue  *mEventQueue;
+  PRBool        mAcceptingEvents, // accept new events or pass them on?
+                mCouldHaveEvents; // accepting new ones, or still have old ones?
+  nsCOMPtr<nsPIEventQueueChain> mElderQueue; // younger can hold on to elder
+  nsPIEventQueueChain *mYoungerQueue; // but elder can't hold on to younger
+
+  void NotifyObservers(const char *aTopic);
+
+  void CheckForDeactivation() {
+    if (mCouldHaveEvents && !mAcceptingEvents && !PL_EventAvailable(mEventQueue)) {
+      if (PL_IsQueueOnCurrentThread(mEventQueue)) {
+        mCouldHaveEvents = PR_FALSE;
+        NS_RELEASE_THIS(); // balance ADDREF from the constructor
+      } else
+        NS_ERROR("CheckForDeactivation called from wrong thread!");
+    }
+  }
+};
+