82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
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* Copyright (C) 2012, 2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ScrollingThread.h"
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#if ENABLE(SCROLLING_THREAD)
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#include <mutex>
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#include <wtf/MainThread.h>
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#include <wtf/NeverDestroyed.h>
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#include <wtf/threads/BinarySemaphore.h>
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namespace WebCore {
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ScrollingThread& ScrollingThread::singleton()
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{
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static LazyNeverDestroyed<ScrollingThread> scrollingThread;
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static std::once_flag onceFlag;
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std::call_once(onceFlag, [] {
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scrollingThread.construct();
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});
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return scrollingThread;
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}
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ScrollingThread::ScrollingThread()
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{
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BinarySemaphore semaphore;
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m_thread = Thread::create("WebCore: Scrolling", [this, &semaphore] {
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WTF::Thread::setCurrentThreadIsUserInteractive();
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m_runLoop = &RunLoop::current();
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semaphore.signal();
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m_runLoop->run();
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});
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semaphore.wait();
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}
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bool ScrollingThread::isCurrentThread()
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{
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return ScrollingThread::singleton().m_thread == &Thread::current();
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}
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void ScrollingThread::dispatch(Function<void ()>&& function)
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{
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ScrollingThread::singleton().runLoop().dispatch(WTFMove(function));
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}
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void ScrollingThread::dispatchBarrier(Function<void ()>&& function)
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{
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dispatch([function = WTFMove(function)]() mutable {
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callOnMainThread(WTFMove(function));
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});
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}
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} // namespace WebCore
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#endif // ENABLE(SCROLLING_THREAD)
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