Imported WebKit commit 7e538425aa020340619e927792f3d895061fb54b (http://svn.webkit.org/repository/webkit/trunk@116286)

1 files changed, 0 insertions, 292 deletions

diff --git a/Source/JavaScriptCore/wtf/MainThread.cpp b/Source/JavaScriptCore/wtf/MainThread.cpp
deleted file mode 100644
index f8686aa31..000000000
--- a/Source/JavaScriptCore/wtf/MainThread.cpp
+++ /dev/null
@@ -1,292 +0,0 @@
-/*
- * 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 "CurrentTime.h"
-#include "Deque.h"
-#include "Functional.h"
-#include "StdLibExtras.h"
-#include "Threading.h"
-#include <wtf/ThreadSpecific.h>
-
-#if PLATFORM(CHROMIUM)
-#error Chromium uses a different main thread implementation
-#endif
-
-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)
-    { 
-    }
-    bool operator == (const FunctionWithContext& o)
-    {
-        return function == o.function
-            && context == o.context
-            && syncFlag == o.syncFlag;
-    }
-};
-
-class FunctionWithContextFinder {
-public:
-    FunctionWithContextFinder(const FunctionWithContext& m) : m(m) {}
-    bool operator() (FunctionWithContext& o) { return o == m; }
-    FunctionWithContext m;
-};
-
-
-typedef Deque<FunctionWithContext> FunctionQueue;
-
-static bool callbacksPaused; // This global variable is only accessed from main thread.
-#if !PLATFORM(MAC)
-static ThreadIdentifier mainThreadIdentifier;
-#endif
-
-static Mutex& mainThreadFunctionQueueMutex()
-{
-    DEFINE_STATIC_LOCAL(Mutex, staticMutex, ());
-    return staticMutex;
-}
-
-static FunctionQueue& functionQueue()
-{
-    DEFINE_STATIC_LOCAL(FunctionQueue, staticFunctionQueue, ());
-    return staticFunctionQueue;
-}
-
-
-#if !PLATFORM(MAC)
-
-void initializeMainThread()
-{
-    static bool initializedMainThread;
-    if (initializedMainThread)
-        return;
-    initializedMainThread = true;
-
-    mainThreadIdentifier = currentThread();
-
-    mainThreadFunctionQueueMutex();
-    initializeMainThreadPlatform();
-    initializeGCThreads();
-}
-
-#else
-
-static pthread_once_t initializeMainThreadKeyOnce = PTHREAD_ONCE_INIT;
-
-static void initializeMainThreadOnce()
-{
-    mainThreadFunctionQueueMutex();
-    initializeMainThreadPlatform();
-}
-
-void initializeMainThread()
-{
-    pthread_once(&initializeMainThreadKeyOnce, initializeMainThreadOnce);
-}
-
-static void initializeMainThreadToProcessMainThreadOnce()
-{
-    mainThreadFunctionQueueMutex();
-    initializeMainThreadToProcessMainThreadPlatform();
-}
-
-void initializeMainThreadToProcessMainThread()
-{
-    pthread_once(&initializeMainThreadKeyOnce, initializeMainThreadToProcessMainThreadOnce);
-}
-#endif
-
-// 0.1 sec delays in UI is approximate threshold when they become noticeable. Have a limit that's half of that.
-static const double maxRunLoopSuspensionTime = 0.05;
-
-void dispatchFunctionsFromMainThread()
-{
-    ASSERT(isMainThread());
-
-    if (callbacksPaused)
-        return;
-
-    double startTime = currentTime();
-
-    FunctionWithContext invocation;
-    while (true) {
-        {
-            MutexLocker locker(mainThreadFunctionQueueMutex());
-            if (!functionQueue().size())
-                break;
-            invocation = functionQueue().takeFirst();
-        }
-
-        invocation.function(invocation.context);
-        if (invocation.syncFlag) {
-            MutexLocker locker(mainThreadFunctionQueueMutex());
-            invocation.syncFlag->signal();
-        }
-
-        // If we are running accumulated functions for too long so UI may become unresponsive, we need to
-        // yield so the user input can be processed. Otherwise user may not be able to even close the window.
-        // This code has effect only in case the scheduleDispatchFunctionsOnMainThread() is implemented in a way that
-        // allows input events to be processed before we are back here.
-        if (currentTime() - startTime > maxRunLoopSuspensionTime) {
-            scheduleDispatchFunctionsOnMainThread();
-            break;
-        }
-    }
-}
-
-void callOnMainThread(MainThreadFunction* function, void* context)
-{
-    ASSERT(function);
-    bool needToSchedule = false;
-    {
-        MutexLocker locker(mainThreadFunctionQueueMutex());
-        needToSchedule = functionQueue().size() == 0;
-        functionQueue().append(FunctionWithContext(function, context));
-    }
-    if (needToSchedule)
-        scheduleDispatchFunctionsOnMainThread();
-}
-
-void callOnMainThreadAndWait(MainThreadFunction* function, void* context)
-{
-    ASSERT(function);
-
-    if (isMainThread()) {
-        function(context);
-        return;
-    }
-
-    ThreadCondition syncFlag;
-    Mutex& functionQueueMutex = mainThreadFunctionQueueMutex();
-    MutexLocker locker(functionQueueMutex);
-    functionQueue().append(FunctionWithContext(function, context, &syncFlag));
-    if (functionQueue().size() == 1)
-        scheduleDispatchFunctionsOnMainThread();
-    syncFlag.wait(functionQueueMutex);
-}
-
-void cancelCallOnMainThread(MainThreadFunction* function, void* context)
-{
-    ASSERT(function);
-
-    MutexLocker locker(mainThreadFunctionQueueMutex());
-
-    FunctionWithContextFinder pred(FunctionWithContext(function, context));
-
-    while (true) {
-        // We must redefine 'i' each pass, because the itererator's operator= 
-        // requires 'this' to be valid, and remove() invalidates all iterators
-        FunctionQueue::iterator i(functionQueue().findIf(pred));
-        if (i == functionQueue().end())
-            break;
-        functionQueue().remove(i);
-    }
-}
-
-static void callFunctionObject(void* context)
-{
-    Function<void ()>* function = static_cast<Function<void ()>*>(context);
-    (*function)();
-    delete function;
-}
-
-void callOnMainThread(const Function<void ()>& function)
-{
-    callOnMainThread(callFunctionObject, new Function<void ()>(function));
-}
-
-void setMainThreadCallbacksPaused(bool paused)
-{
-    ASSERT(isMainThread());
-
-    if (callbacksPaused == paused)
-        return;
-
-    callbacksPaused = paused;
-
-    if (!callbacksPaused)
-        scheduleDispatchFunctionsOnMainThread();
-}
-
-#if !PLATFORM(MAC)
-bool isMainThread()
-{
-    return currentThread() == mainThreadIdentifier;
-}
-#endif
-
-#if ENABLE(PARALLEL_GC)
-static ThreadSpecific<bool>* isGCThread;
-#endif
-
-void initializeGCThreads()
-{
-#if ENABLE(PARALLEL_GC)
-    isGCThread = new ThreadSpecific<bool>();
-#endif
-}
-
-#if ENABLE(PARALLEL_GC)
-void registerGCThread()
-{
-    if (!isGCThread) {
-        // This happens if we're running in a process that doesn't care about
-        // MainThread.
-        return;
-    }
-
-    **isGCThread = true;
-}
-
-bool isMainThreadOrGCThread()
-{
-    if (isGCThread->isSet() && **isGCThread)
-        return true;
-
-    return isMainThread();
-}
-#elif PLATFORM(MAC)
-// This is necessary because JavaScriptCore.exp doesn't support preprocessor macros.
-bool isMainThreadOrGCThread()
-{
-    return isMainThread();
-}
-#endif
-
-} // namespace WTF