Removing a bunch of unused platform code.

Source/WebCore/platform/RunLoop.cpp

-/*
- * Copyright (C) 2010 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.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 "RunLoop.h"
-
-#include <wtf/StdLibExtras.h>
-
-namespace WebCore {
-
-#if !PLATFORM(MAC)
-
-static RunLoop* s_mainRunLoop;
-
-void RunLoop::initializeMainRunLoop()
-{
-    if (s_mainRunLoop)
-        return;
-    s_mainRunLoop = RunLoop::current();
-}
-
-RunLoop* RunLoop::current()
-{
-    DEFINE_STATIC_LOCAL(WTF::ThreadSpecific<RunLoop>, runLoopData, ());
-    return &*runLoopData;
-}
-
-RunLoop* RunLoop::main()
-{
-    ASSERT(s_mainRunLoop);
-    return s_mainRunLoop;
-}
-
-void RunLoop::setUseApplicationRunLoopOnMainRunLoop()
-{
-}
-
-#endif
-
-void RunLoop::performWork()
-{
-    // It is important to handle the functions in the queue one at a time because while inside one of these
-    // functions we might re-enter RunLoop::performWork() and we need to be able to pick up where we left off.
-    // See http://webkit.org/b/89590 for more discussion.
-
-    // One possible scenario when handling the function queue is as follows:
-    // - RunLoop::performWork() is invoked with 1 function on the queue
-    // - Handling that function results in 1 more function being enqueued
-    // - Handling that one results in yet another being enqueued
-    // - And so on
-    //
-    // In this situation one invocation of performWork() never returns so all other event sources are blocked.
-    // By only handling up to the number of functions that were in the queue when performWork() is called
-    // we guarantee to occasionally return from the run loop so other event sources will be allowed to spin.
-
-    Function<void()> function;
-    size_t functionsToHandle = 0;
-
-    {
-        MutexLocker locker(m_functionQueueLock);
-        functionsToHandle = m_functionQueue.size();
-
-        if (m_functionQueue.isEmpty())
-            return;
-
-        function = m_functionQueue.takeFirst();
-    }
-
-    function();
-
-    for (size_t functionsHandled = 1; functionsHandled < functionsToHandle; ++functionsHandled) {
-        {
-            MutexLocker locker(m_functionQueueLock);
-
-            // Even if we start off with N functions to handle and we've only handled less than N functions, the queue
-            // still might be empty because those functions might have been handled in an inner RunLoop::performWork().
-            // In that case we should bail here.
-            if (m_functionQueue.isEmpty())
-                break;
-
-            function = m_functionQueue.takeFirst();
-        }
-        
-        function();
-    }
-}
-
-void RunLoop::dispatch(const Function<void()>& function)
-{
-    MutexLocker locker(m_functionQueueLock);
-    m_functionQueue.append(function);
-
-    wakeUp();
-}
-
-} // namespace WebCore