1 files changed, 457 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp b/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp
new file mode 100644
index 00000000..b4cc15f4
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/threads/nsThread.cpp
@@ -0,0 +1,457 @@
+/* -*- 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.org 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):
+ *
+ * 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 "nsThread.h"
+#include "prmem.h"
+#include "prlog.h"
+#include "nsAutoLock.h"
+
+PRUintn nsThread::kIThreadSelfIndex = 0;
+static nsIThread *gMainThread = 0;
+
+#if defined(PR_LOGGING)
+//
+// Log module for nsIThread logging...
+//
+// To enable logging (see prlog.h for full details):
+//
+//    set NSPR_LOG_MODULES=nsIThread:5
+//    set NSPR_LOG_FILE=nspr.log
+//
+// this enables PR_LOG_DEBUG level information and places all output in
+// the file nspr.log
+//
+// gSocketLog is defined in nsSocketTransport.cpp
+//
+PRLogModuleInfo* nsIThreadLog = nsnull;
+
+#endif /* PR_LOGGING */
+
+////////////////////////////////////////////////////////////////////////////////
+
+nsThread::nsThread()
+    : mThread(nsnull), mDead(PR_FALSE), mStartLock(nsnull)
+{
+#if defined(PR_LOGGING)
+    //
+    // Initialize the global PRLogModule for nsIThread logging 
+    // if necessary...
+    //
+    if (nsIThreadLog == nsnull) {
+        nsIThreadLog = PR_NewLogModule("nsIThread");
+    }
+#endif /* PR_LOGGING */
+
+    // enforce matching of constants to enums in prthread.h
+    NS_ASSERTION(int(nsIThread::PRIORITY_LOW)     == int(PR_PRIORITY_LOW) &&
+                 int(nsIThread::PRIORITY_NORMAL)  == int(PRIORITY_NORMAL) &&
+                 int(nsIThread::PRIORITY_HIGH)    == int(PRIORITY_HIGH) &&
+                 int(nsIThread::PRIORITY_URGENT)  == int(PRIORITY_URGENT) &&
+                 int(nsIThread::SCOPE_LOCAL)      == int(PR_LOCAL_THREAD) &&
+                 int(nsIThread::SCOPE_GLOBAL)     == int(PR_GLOBAL_THREAD) &&
+                 int(nsIThread::STATE_JOINABLE)   == int(PR_JOINABLE_THREAD) &&
+                 int(nsIThread::STATE_UNJOINABLE) == int(PR_UNJOINABLE_THREAD),
+                 "Bad constant in nsIThread!");
+}
+
+nsThread::~nsThread()
+{
+    if (mStartLock)
+        PR_DestroyLock(mStartLock);
+
+    PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+           ("nsIThread %p destroyed\n", this));
+
+    // This code used to free the nsIThreadLog loginfo stuff
+    // Don't do that; loginfo structures are owned by nspr
+    // and would be freed if we ever called PR_Cleanup()
+    // see bug 142072
+}
+
+void
+nsThread::Main(void* arg)
+{
+    nsThread* self = (nsThread*)arg;
+
+    self->WaitUntilReadyToStartMain();
+
+    nsresult rv = NS_OK;
+    rv = self->RegisterThreadSelf();
+    NS_ASSERTION(rv == NS_OK, "failed to set thread self");
+
+    PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+           ("nsIThread %p start run %p\n", self, self->mRunnable.get()));
+    rv = self->mRunnable->Run();
+    NS_ASSERTION(NS_SUCCEEDED(rv), "runnable failed");
+
+#ifdef DEBUG
+    // Because a thread can die after gMainThread dies and takes nsIThreadLog with it,
+    // we need to check for it being null so that we don't crash on shutdown.
+    if (nsIThreadLog) {
+      PRThreadState state;
+      rv = self->GetState(&state);
+      PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+             ("nsIThread %p end run %p\n", self, self->mRunnable.get()));
+    }
+#endif
+
+    // explicitly drop the runnable now in case there are circular references
+    // between it and the thread object
+    self->mRunnable = nsnull;
+}
+
+void
+nsThread::Exit(void* arg)
+{
+    nsThread* self = (nsThread*)arg;
+
+    if (self->mDead) {
+        NS_ERROR("attempt to Exit() thread twice");
+        return;
+    }
+
+    self->mDead = PR_TRUE;
+
+#if defined(PR_LOGGING)
+    if (nsIThreadLog) {
+      PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+             ("nsIThread %p exited\n", self));
+    }
+#endif
+    NS_RELEASE(self);
+}
+
+NS_METHOD
+nsThread::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
+{
+    nsThread* thread = new nsThread();
+    if (!thread) return NS_ERROR_OUT_OF_MEMORY;
+    nsresult rv = thread->QueryInterface(aIID, aResult);
+    if (NS_FAILED(rv)) delete thread;
+    return rv;
+}
+
+NS_IMPL_THREADSAFE_ISUPPORTS1(nsThread, nsIThread)
+
+NS_IMETHODIMP
+nsThread::Join()
+{
+    // don't check for mDead here because nspr calls Exit (cleaning up
+    // thread-local storage) before they let us join with the thread
+
+    PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+           ("nsIThread %p start join\n", this));
+    if (!mThread)
+        return NS_ERROR_NOT_INITIALIZED;
+    PRStatus status = PR_JoinThread(mThread);
+    // XXX can't use NS_RELEASE here because the macro wants to set
+    // this to null (bad c++)
+    PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+           ("nsIThread %p end join\n", this));
+    if (status == PR_SUCCESS) {
+        NS_RELEASE_THIS();   // most likely the final release of this thread 
+        return NS_OK;
+    }
+    else
+        return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsThread::GetPriority(PRThreadPriority *result)
+{
+    if (mDead)
+        return NS_ERROR_FAILURE;
+    if (!mThread)
+        return NS_ERROR_NOT_INITIALIZED;
+    *result = PR_GetThreadPriority(mThread);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsThread::SetPriority(PRThreadPriority value)
+{
+    if (mDead)
+        return NS_ERROR_FAILURE;
+    if (!mThread)
+        return NS_ERROR_NOT_INITIALIZED;
+    PR_SetThreadPriority(mThread, value);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsThread::Interrupt()
+{
+    if (mDead)
+        return NS_ERROR_FAILURE;
+    if (!mThread)
+        return NS_ERROR_NOT_INITIALIZED;
+    PRStatus status = PR_Interrupt(mThread);
+    return status == PR_SUCCESS ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsThread::GetScope(PRThreadScope *result)
+{
+    if (mDead)
+        return NS_ERROR_FAILURE;
+    if (!mThread)
+        return NS_ERROR_NOT_INITIALIZED;
+    *result = PR_GetThreadScope(mThread);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsThread::GetState(PRThreadState *result)
+{
+    if (mDead)
+        return NS_ERROR_FAILURE;
+    if (!mThread)
+        return NS_ERROR_NOT_INITIALIZED;
+    *result = PR_GetThreadState(mThread);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsThread::GetPRThread(PRThread* *result)
+{
+    if (mDead) {
+        *result = nsnull;
+        return NS_ERROR_FAILURE;
+    }    
+    *result = mThread;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsThread::Init(nsIRunnable* runnable,
+               PRUint32 stackSize,
+               PRThreadPriority priority,
+               PRThreadScope scope,
+               PRThreadState state)
+{
+    NS_ENSURE_ARG_POINTER(runnable);
+    mRunnable = runnable;
+
+    NS_ADDREF_THIS();   // released in nsThread::Exit
+    if (state == PR_JOINABLE_THREAD)
+        NS_ADDREF_THIS();   // released in nsThread::Join
+    mStartLock = PR_NewLock();
+    if (mStartLock == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    PR_Lock(mStartLock);
+    mThread = PR_CreateThread(PR_USER_THREAD, Main, this,
+                              priority, scope, state, stackSize);
+    PR_Unlock(mStartLock);
+    PR_LOG(nsIThreadLog, PR_LOG_DEBUG,
+           ("nsIThread %p created\n", this));
+
+    if (mThread == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    return NS_OK;
+}
+
+/* readonly attribute nsIThread currentThread; */
+NS_IMETHODIMP 
+nsThread::GetCurrentThread(nsIThread * *aCurrentThread)
+{
+    return GetIThread(PR_GetCurrentThread(), aCurrentThread);
+}
+
+/* void sleep (in PRUint32 msec); */
+NS_IMETHODIMP 
+nsThread::Sleep(PRUint32 msec)
+{
+    if (PR_GetCurrentThread() != mThread)
+        return NS_ERROR_FAILURE;
+    
+    if (PR_Sleep(PR_MillisecondsToInterval(msec)) != PR_SUCCESS)
+        return NS_ERROR_FAILURE;
+
+    return NS_OK;
+}
+
+NS_COM nsresult
+NS_NewThread(nsIThread* *result, 
+             nsIRunnable* runnable,
+             PRUint32 stackSize,
+             PRThreadState state,
+             PRThreadPriority priority,
+             PRThreadScope scope)
+{
+    nsresult rv;
+    nsThread* thread = new nsThread();
+    if (thread == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    NS_ADDREF(thread);
+
+    rv = thread->Init(runnable, stackSize, priority, scope, state);
+    if (NS_FAILED(rv)) {
+        NS_RELEASE(thread);
+        return rv;
+    }
+
+    *result = thread;
+    return NS_OK;
+}
+
+NS_COM nsresult
+NS_NewThread(nsIThread* *result, 
+             PRUint32 stackSize,
+             PRThreadState state,
+             PRThreadPriority priority,
+             PRThreadScope scope)
+{
+    nsThread* thread = new nsThread();
+    if (thread == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    NS_ADDREF(thread);
+    *result = thread;
+    return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+nsresult
+nsThread::RegisterThreadSelf()
+{
+    PRStatus status;
+
+    if (kIThreadSelfIndex == 0) {
+        status = PR_NewThreadPrivateIndex(&kIThreadSelfIndex, Exit);
+        if (status != PR_SUCCESS) return NS_ERROR_FAILURE;
+    }
+
+    status = PR_SetThreadPrivate(kIThreadSelfIndex, this);
+    if (status != PR_SUCCESS) return NS_ERROR_FAILURE;
+
+    return NS_OK;
+}
+
+void 
+nsThread::WaitUntilReadyToStartMain()
+{
+    PR_Lock(mStartLock);
+    PR_Unlock(mStartLock);
+    PR_DestroyLock(mStartLock);
+    mStartLock = nsnull;
+}
+
+NS_COM nsresult
+nsIThread::GetCurrent(nsIThread* *result)
+{
+    return GetIThread(PR_GetCurrentThread(), result);
+}
+
+NS_COM nsresult
+nsIThread::GetIThread(PRThread* prthread, nsIThread* *result)
+{
+    PRStatus status;
+    nsThread* thread;
+
+    if (nsThread::kIThreadSelfIndex == 0) {
+        status = PR_NewThreadPrivateIndex(&nsThread::kIThreadSelfIndex, nsThread::Exit);
+        if (status != PR_SUCCESS) return NS_ERROR_FAILURE;
+    }
+
+    thread = (nsThread*)PR_GetThreadPrivate(nsThread::kIThreadSelfIndex);
+    if (thread == nsnull) {
+        // if the current thread doesn't have an nsIThread associated
+        // with it, make one
+        thread = new nsThread();
+        if (thread == nsnull)
+            return NS_ERROR_OUT_OF_MEMORY;
+        NS_ADDREF(thread);      // released by Exit
+        thread->SetPRThread(prthread);
+        nsresult rv = thread->RegisterThreadSelf();
+        if (NS_FAILED(rv)) return rv;
+    }
+    NS_ADDREF(thread);
+    *result = thread;
+    return NS_OK;
+}
+
+NS_COM nsresult
+nsIThread::SetMainThread()
+{
+    // strictly speaking, it could be set twice. but practically speaking,
+    // it's almost certainly an error if it is
+    if (gMainThread != 0) {
+        NS_ERROR("Setting main thread twice?");
+        return NS_ERROR_FAILURE;
+    }
+    return GetCurrent(&gMainThread);
+}
+
+NS_COM nsresult
+nsIThread::GetMainThread(nsIThread **result)
+{
+    NS_ASSERTION(result, "bad result pointer");
+    if (gMainThread == 0)
+        return NS_ERROR_FAILURE;
+    *result = gMainThread;
+    NS_ADDREF(gMainThread);
+    return NS_OK;
+}
+
+NS_COM PRBool
+nsIThread::IsMainThread()
+{
+    if (gMainThread == 0)
+        return PR_TRUE;
+    
+    PRThread *theMainThread;
+    gMainThread->GetPRThread(&theMainThread);
+    return theMainThread == PR_GetCurrentThread();
+}
+
+void 
+nsThread::Shutdown()
+{
+    if (gMainThread) {
+        // XXX nspr doesn't seem to be calling the main thread's destructor
+        // callback, so let's help it out:
+        nsThread::Exit(NS_STATIC_CAST(nsThread*, gMainThread));
+        nsrefcnt cnt;
+        NS_RELEASE2(gMainThread, cnt);
+        NS_WARN_IF_FALSE(cnt == 0, "Main thread being held past XPCOM shutdown.");
+        gMainThread = nsnull;
+        
+        kIThreadSelfIndex = 0;
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////