1 /* 2 * Copyright (C) 2010 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 #ifndef BinarySemaphore_h 27 #define BinarySemaphore_h 28 29 #include <wtf/Noncopyable.h> 30 #include <wtf/ThreadingPrimitives.h> 31 32 namespace CoreIPC { 33 34 class BinarySemaphore { 35 WTF_MAKE_NONCOPYABLE(BinarySemaphore); 36 37 public: 38 BinarySemaphore(); 39 ~BinarySemaphore(); 40 41 void signal(); 42 bool wait(double absoluteTime); 43 44 #if PLATFORM(WIN) event()45 HANDLE event() const { return m_event; } 46 #endif 47 48 private: 49 #if PLATFORM(WIN) 50 HANDLE m_event; 51 #else 52 bool m_isSet; 53 54 Mutex m_mutex; 55 ThreadCondition m_condition; 56 #endif 57 }; 58 59 } // namespace CoreIPC 60 61 62 #endif // BinarySemaphore_h 63