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
BinarySemaphore()33 BinarySemaphore::BinarySemaphore()
34 : m_isSet(false)
35 {
36 }
37
~BinarySemaphore()38 BinarySemaphore::~BinarySemaphore()
39 {
40 }
41
signal()42 void BinarySemaphore::signal()
43 {
44 MutexLocker locker(m_mutex);
45
46 m_isSet = true;
47 m_condition.signal();
48 }
49
wait(double absoluteTime)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