1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ScrollingThread.h"
28
29#if ENABLE(THREADED_SCROLLING)
30
31namespace WebCore {
32
33void ScrollingThread::initializeRunLoop()
34{
35    // Initialize the run loop.
36    {
37        MutexLocker locker(m_initializeRunLoopConditionMutex);
38
39        m_threadRunLoop = CFRunLoopGetCurrent();
40
41        CFRunLoopSourceContext context = { 0, this, 0, 0, 0, 0, 0, 0, 0, threadRunLoopSourceCallback };
42        m_threadRunLoopSource = adoptCF(CFRunLoopSourceCreate(0, 0, &context));
43        CFRunLoopAddSource(CFRunLoopGetCurrent(), m_threadRunLoopSource.get(), kCFRunLoopDefaultMode);
44
45        m_initializeRunLoopCondition.broadcast();
46    }
47
48    ASSERT(isCurrentThread());
49
50    CFRunLoopRun();
51}
52
53void ScrollingThread::wakeUpRunLoop()
54{
55    CFRunLoopSourceSignal(m_threadRunLoopSource.get());
56    CFRunLoopWakeUp(m_threadRunLoop.get());
57}
58
59void ScrollingThread::threadRunLoopSourceCallback(void* scrollingThread)
60{
61    static_cast<ScrollingThread*>(scrollingThread)->threadRunLoopSourceCallback();
62}
63
64void ScrollingThread::threadRunLoopSourceCallback()
65{
66    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
67    dispatchFunctionsFromScrollingThread();
68    [pool drain];
69}
70
71} // namespace WebCore
72
73#endif // ENABLE(THREADED_SCROLLING)
74