1/*
2 * Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved.
3 * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com)
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
15 * its contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 */
30
31#pragma once
32
33#include <wtf/FastMalloc.h>
34#include <wtf/Locker.h>
35#include <wtf/Noncopyable.h>
36#include <wtf/WallTime.h>
37
38#if OS(WINDOWS)
39#include <windows.h>
40#endif
41
42#if USE(PTHREADS)
43#include <pthread.h>
44#endif
45
46namespace WTF {
47
48using ThreadFunction = void (*)(void* argument);
49
50#if USE(PTHREADS)
51using PlatformThreadHandle = pthread_t;
52using PlatformMutex = pthread_mutex_t;
53using PlatformCondition = pthread_cond_t;
54#elif OS(WINDOWS)
55using ThreadIdentifier = uint32_t;
56using PlatformThreadHandle = HANDLE;
57using PlatformMutex = SRWLOCK;
58using PlatformCondition = CONDITION_VARIABLE;
59#else
60#error "Not supported platform"
61#endif
62
63class Mutex {
64 WTF_MAKE_NONCOPYABLE(Mutex);
65 WTF_MAKE_FAST_ALLOCATED;
66public:
67 constexpr Mutex() = default;
68 WTF_EXPORT_PRIVATE ~Mutex();
69
70 WTF_EXPORT_PRIVATE void lock();
71 WTF_EXPORT_PRIVATE bool tryLock();
72 WTF_EXPORT_PRIVATE void unlock();
73
74 PlatformMutex& impl() { return m_mutex; }
75
76private:
77#if USE(PTHREADS)
78 PlatformMutex m_mutex = PTHREAD_MUTEX_INITIALIZER;
79#elif OS(WINDOWS)
80 PlatformMutex m_mutex = SRWLOCK_INIT;
81#endif
82};
83
84typedef Locker<Mutex> MutexLocker;
85
86class ThreadCondition {
87 WTF_MAKE_NONCOPYABLE(ThreadCondition);
88 WTF_MAKE_FAST_ALLOCATED;
89public:
90 constexpr ThreadCondition() = default;
91 WTF_EXPORT_PRIVATE ~ThreadCondition();
92
93 WTF_EXPORT_PRIVATE void wait(Mutex& mutex);
94 // Returns true if the condition was signaled before absoluteTime, false if the absoluteTime was reached or is in the past.
95 WTF_EXPORT_PRIVATE bool timedWait(Mutex&, WallTime absoluteTime);
96 WTF_EXPORT_PRIVATE void signal();
97 WTF_EXPORT_PRIVATE void broadcast();
98
99private:
100#if USE(PTHREADS)
101 PlatformCondition m_condition = PTHREAD_COND_INITIALIZER;
102#elif OS(WINDOWS)
103 PlatformCondition m_condition = CONDITION_VARIABLE_INIT;
104#endif
105};
106
107} // namespace WTF
108
109using WTF::Mutex;
110using WTF::MutexLocker;
111using WTF::ThreadCondition;
112