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 #include "config.h" 27 #include "BinarySemaphore.h" 28 29 namespace CoreIPC { 30 31 #if !PLATFORM(WIN) 32 33 BinarySemaphore::BinarySemaphore() 34 : m_isSet(false) 35 { 36 } 37 38 BinarySemaphore::~BinarySemaphore() 39 { 40 } 41 42 void BinarySemaphore::signal() 43 { 44 MutexLocker locker(m_mutex); 45 46 m_isSet = true; 47 m_condition.signal(); 48 } 49 50 bool BinarySemaphore::wait(double absoluteTime) 51 { 52 MutexLocker locker(m_mutex); 53 54 bool timedOut = false; 55 while (!m_isSet) { 56 timedOut = !m_condition.timedWait(m_mutex, absoluteTime); 57 if (timedOut) 58 return false; 59 } 60 61 // Reset the semaphore. 62 m_isSet = false; 63 return true; 64 } 65 66 #endif // !PLATFORM(WIN) 67 68 } // namespace CoreIPC 69