WebKit merge 40668:40722 part 1.

third_party/WebKit/JavaScriptCore/wtf/MainThread.cpp

Index: third_party/WebKit/JavaScriptCore/wtf/MainThread.cpp
===================================================================
--- third_party/WebKit/JavaScriptCore/wtf/MainThread.cpp	(revision 9310)
+++ third_party/WebKit/JavaScriptCore/wtf/MainThread.cpp	(working copy)
@@ -1,143 +1,143 @@
-/*
- * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "MainThread.h"
-
-#include "StdLibExtras.h"
-#include "Threading.h"
-#include "Vector.h"
-
-namespace WTF {
-
-struct FunctionWithContext {
-    MainThreadFunction* function;
-    void* context;
-    ThreadCondition* syncFlag;
-
-    FunctionWithContext(MainThreadFunction* function = 0, void* context = 0, ThreadCondition* syncFlag = 0)
-        : function(function)
-        , context(context)
-        , syncFlag(syncFlag)
-    { 
-    }
-};
-
-typedef Vector<FunctionWithContext> FunctionQueue;
-
-static bool callbacksPaused; // This global variable is only accessed from main thread.
-
-Mutex& mainThreadFunctionQueueMutex()
-{
-    DEFINE_STATIC_LOCAL(Mutex, staticMutex, ());
-    return staticMutex;
-}
-
-static FunctionQueue& functionQueue()
-{
-    DEFINE_STATIC_LOCAL(FunctionQueue, staticFunctionQueue, ());
-    return staticFunctionQueue;
-}
-
-#if !PLATFORM(WIN)
-void initializeMainThread()
-{
-    mainThreadFunctionQueueMutex();
-}
-#endif
-
-void dispatchFunctionsFromMainThread()
-{
-    ASSERT(isMainThread());
-
-    if (callbacksPaused)
-        return;
-
-    FunctionQueue queueCopy;
-    {
-        MutexLocker locker(mainThreadFunctionQueueMutex());
-        queueCopy.swap(functionQueue());
-    }
-
-    for (unsigned i = 0; i < queueCopy.size(); ++i) {
-        FunctionWithContext& invocation = queueCopy[i];
-        invocation.function(invocation.context);
-        if (invocation.syncFlag)
-            invocation.syncFlag->signal();
-    }
-}
-
-void callOnMainThread(MainThreadFunction* function, void* context)
-{
-    ASSERT(function);
-
-    {
-        MutexLocker locker(mainThreadFunctionQueueMutex());
-        functionQueue().append(FunctionWithContext(function, context));
-    }
-
-    scheduleDispatchFunctionsOnMainThread();
-}
-
-void callOnMainThreadAndWait(MainThreadFunction* function, void* context)
-{
-    ASSERT(function);
-
-    if (isMainThread()) {
-        function(context);
-        return;
-    }
-
-    ThreadCondition syncFlag;
-    Mutex conditionMutex;
-
-    {
-        MutexLocker locker(mainThreadFunctionQueueMutex());
-        functionQueue().append(FunctionWithContext(function, context, &syncFlag));
-        conditionMutex.lock();
-    }
-
-    scheduleDispatchFunctionsOnMainThread();
-    syncFlag.wait(conditionMutex);
-}
-
-void setMainThreadCallbacksPaused(bool paused)
-{
-    ASSERT(isMainThread());
-
-    if (callbacksPaused == paused)
-        return;
-
-    callbacksPaused = paused;
-
-    if (!callbacksPaused)
-        scheduleDispatchFunctionsOnMainThread();
-}
-
-} // namespace WTF
-
+/*
+ * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "MainThread.h"
+
+#include "StdLibExtras.h"
+#include "Threading.h"
+#include "Vector.h"
+
+namespace WTF {
+
+struct FunctionWithContext {
+    MainThreadFunction* function;
+    void* context;
+    ThreadCondition* syncFlag;
+
+    FunctionWithContext(MainThreadFunction* function = 0, void* context = 0, ThreadCondition* syncFlag = 0)
+        : function(function)
+        , context(context)
+        , syncFlag(syncFlag)
+    { 
+    }
+};
+
+typedef Vector<FunctionWithContext> FunctionQueue;
+
+static bool callbacksPaused; // This global variable is only accessed from main thread.
+
+Mutex& mainThreadFunctionQueueMutex()
+{
+    DEFINE_STATIC_LOCAL(Mutex, staticMutex, ());
+    return staticMutex;
+}
+
+static FunctionQueue& functionQueue()
+{
+    DEFINE_STATIC_LOCAL(FunctionQueue, staticFunctionQueue, ());
+    return staticFunctionQueue;
+}
+
+#if !PLATFORM(WIN) && !PLATFORM(CHROMIUM)
+void initializeMainThread()
+{
+    mainThreadFunctionQueueMutex();
+}
+#endif
+
+void dispatchFunctionsFromMainThread()
+{
+    ASSERT(isMainThread());
+
+    if (callbacksPaused)
+        return;
+
+    FunctionQueue queueCopy;
+    {
+        MutexLocker locker(mainThreadFunctionQueueMutex());
+        queueCopy.swap(functionQueue());
+    }
+
+    for (unsigned i = 0; i < queueCopy.size(); ++i) {
+        FunctionWithContext& invocation = queueCopy[i];
+        invocation.function(invocation.context);
+        if (invocation.syncFlag)
+            invocation.syncFlag->signal();
+    }
+}
+
+void callOnMainThread(MainThreadFunction* function, void* context)
+{
+    ASSERT(function);
+
+    {
+        MutexLocker locker(mainThreadFunctionQueueMutex());
+        functionQueue().append(FunctionWithContext(function, context));
+    }
+
+    scheduleDispatchFunctionsOnMainThread();
+}
+
+void callOnMainThreadAndWait(MainThreadFunction* function, void* context)
+{
+    ASSERT(function);
+
+    if (isMainThread()) {
+        function(context);
+        return;
+    }
+
+    ThreadCondition syncFlag;
+    Mutex conditionMutex;
+
+    {
+        MutexLocker locker(mainThreadFunctionQueueMutex());
+        functionQueue().append(FunctionWithContext(function, context, &syncFlag));
+        conditionMutex.lock();
+    }
+
+    scheduleDispatchFunctionsOnMainThread();
+    syncFlag.wait(conditionMutex);
+}
+
+void setMainThreadCallbacksPaused(bool paused)
+{
+    ASSERT(isMainThread());
+
+    if (callbacksPaused == paused)
+        return;
+
+    callbacksPaused = paused;
+
+    if (!callbacksPaused)
+        scheduleDispatchFunctionsOnMainThread();
+}
+
+} // namespace WTF
+