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      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