152 lines
4.4 KiB
C++
152 lines
4.4 KiB
C++
/*
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* Copyright (C) 2007, 2008, 2010 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#pragma once
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#include <limits.h>
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#include <wtf/FastMalloc.h>
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#include <wtf/Locker.h>
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#include <wtf/Noncopyable.h>
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#include <wtf/WallTime.h>
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#if OS(WINDOWS)
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#include <windows.h>
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#endif
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#if USE(PTHREADS)
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#include <pthread.h>
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#if !defined(PTHREAD_KEYS_MAX)
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// PTHREAD_KEYS_MAX is not defined in bionic nor in Hurd, so explicitly define it here.
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#define PTHREAD_KEYS_MAX 1024
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#endif
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#endif
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namespace WTF {
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using ThreadFunction = void (*)(void* argument);
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#if USE(PTHREADS)
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using PlatformThreadHandle = pthread_t;
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using PlatformMutex = pthread_mutex_t;
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using PlatformCondition = pthread_cond_t;
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using ThreadSpecificKey = pthread_key_t;
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#if OS(LINUX)
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using ThreadIdentifier = pid_t;
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#endif
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#elif OS(WINDOWS)
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using ThreadIdentifier = uint32_t;
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using PlatformThreadHandle = HANDLE;
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using PlatformMutex = SRWLOCK;
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using PlatformCondition = CONDITION_VARIABLE;
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using ThreadSpecificKey = DWORD;
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#else
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#error "Not supported platform"
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#endif
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class Mutex final {
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WTF_MAKE_NONCOPYABLE(Mutex);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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constexpr Mutex() = default;
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WTF_EXPORT_PRIVATE ~Mutex();
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WTF_EXPORT_PRIVATE void lock();
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WTF_EXPORT_PRIVATE bool tryLock();
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WTF_EXPORT_PRIVATE void unlock();
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PlatformMutex& impl() { return m_mutex; }
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private:
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#if USE(PTHREADS)
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PlatformMutex m_mutex = PTHREAD_MUTEX_INITIALIZER;
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#elif OS(WINDOWS)
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PlatformMutex m_mutex = SRWLOCK_INIT;
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#endif
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};
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typedef Locker<Mutex> MutexLocker;
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class ThreadCondition final {
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WTF_MAKE_NONCOPYABLE(ThreadCondition);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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constexpr ThreadCondition() = default;
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WTF_EXPORT_PRIVATE ~ThreadCondition();
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WTF_EXPORT_PRIVATE void wait(Mutex& mutex);
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// Returns true if the condition was signaled before absoluteTime, false if the absoluteTime was reached or is in the past.
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WTF_EXPORT_PRIVATE bool timedWait(Mutex&, WallTime absoluteTime);
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WTF_EXPORT_PRIVATE void signal();
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WTF_EXPORT_PRIVATE void broadcast();
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private:
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#if USE(PTHREADS)
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PlatformCondition m_condition = PTHREAD_COND_INITIALIZER;
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#elif OS(WINDOWS)
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PlatformCondition m_condition = CONDITION_VARIABLE_INIT;
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#endif
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};
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#if USE(PTHREADS)
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static constexpr ThreadSpecificKey InvalidThreadSpecificKey = PTHREAD_KEYS_MAX;
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inline void threadSpecificKeyCreate(ThreadSpecificKey* key, void (*destructor)(void *))
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{
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int error = pthread_key_create(key, destructor);
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if (error)
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CRASH();
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}
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inline void threadSpecificKeyDelete(ThreadSpecificKey key)
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{
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int error = pthread_key_delete(key);
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if (error)
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CRASH();
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}
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inline void threadSpecificSet(ThreadSpecificKey key, void* value)
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{
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pthread_setspecific(key, value);
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}
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inline void* threadSpecificGet(ThreadSpecificKey key)
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{
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return pthread_getspecific(key);
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}
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#endif
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} // namespace WTF
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using WTF::Mutex;
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using WTF::MutexLocker;
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using WTF::ThreadCondition;
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