/* * Copyright (C) 2017 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. */ #pragma once #include <wtf/Forward.h> #include <wtf/Threading.h> namespace WKQCA { class CVDisplayLinkClient; // This class is a stand-in for CoreVideo's CVDisplayLinkRef until that class is usable on Windows. // FIXME 8769181: Replace this with CVDisplayLinkRef class CVDisplayLink : public ThreadSafeRefCounted<CVDisplayLink> { public: static RefPtr<CVDisplayLink> create(CVDisplayLinkClient*); ~CVDisplayLink(); void start(); void stop(); void setPaused(bool); private: CVDisplayLink(CVDisplayLinkClient*); void runIOThread(); CVDisplayLinkClient* m_client; HANDLE m_wakeupEvent; RefPtr<Thread> m_ioThread; volatile bool m_isRunning { false }; volatile bool m_isPaused { false }; }; } // namespace WKQCA