70 lines
2.4 KiB
C++
70 lines
2.4 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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#pragma once
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#if ENABLE(SCROLLING_THREAD)
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#include <functional>
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#include <wtf/Condition.h>
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#include <wtf/Forward.h>
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#include <wtf/Function.h>
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#include <wtf/Lock.h>
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#include <wtf/Noncopyable.h>
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#include <wtf/RunLoop.h>
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#include <wtf/Threading.h>
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#include <wtf/Vector.h>
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namespace WebCore {
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class ScrollingThread {
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WTF_MAKE_NONCOPYABLE(ScrollingThread);
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public:
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WEBCORE_EXPORT static bool isCurrentThread();
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WEBCORE_EXPORT static void dispatch(Function<void ()>&&);
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// Will dispatch the given function on the main thread once all pending functions
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// on the scrolling thread have finished executing. Used for synchronization purposes.
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WEBCORE_EXPORT static void dispatchBarrier(Function<void ()>&&);
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private:
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friend LazyNeverDestroyed<ScrollingThread>;
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static ScrollingThread& singleton();
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ScrollingThread();
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void dispatchFunctionsFromScrollingThread();
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RunLoop& runLoop() { return *m_runLoop; }
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RefPtr<Thread> m_thread;
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RunLoop* m_runLoop { nullptr };
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};
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} // namespace WebCore
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#endif // ENABLE(SCROLLING_THREAD)
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