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121 lines
3.3 KiB
C++
121 lines
3.3 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 Computer, 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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#ifndef SKY_ENGINE_WTF_THREADINGPRIMITIVES_H_
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#define SKY_ENGINE_WTF_THREADINGPRIMITIVES_H_
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#include "flutter/sky/engine/wtf/Assertions.h"
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#include "flutter/sky/engine/wtf/FastAllocBase.h"
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#include "flutter/sky/engine/wtf/Locker.h"
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#include "flutter/sky/engine/wtf/Noncopyable.h"
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#include "flutter/sky/engine/wtf/WTFExport.h"
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#if USE(PTHREADS)
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#include <pthread.h>
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#endif
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namespace WTF {
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#if USE(PTHREADS)
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struct PlatformMutex {
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pthread_mutex_t m_internalMutex;
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#if ENABLE(ASSERT)
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size_t m_recursionCount;
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#endif
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};
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typedef pthread_cond_t PlatformCondition;
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#else
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typedef void* PlatformMutex;
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typedef void* PlatformCondition;
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#endif
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class WTF_EXPORT MutexBase {
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WTF_MAKE_NONCOPYABLE(MutexBase);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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~MutexBase();
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void lock();
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void unlock();
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#if ENABLE(ASSERT)
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bool locked() { return m_mutex.m_recursionCount > 0; }
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#endif
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public:
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PlatformMutex& impl() { return m_mutex; }
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protected:
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MutexBase(bool recursive);
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PlatformMutex m_mutex;
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};
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class WTF_EXPORT Mutex : public MutexBase {
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public:
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Mutex() : MutexBase(false) {}
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bool tryLock();
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};
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class WTF_EXPORT RecursiveMutex : public MutexBase {
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public:
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RecursiveMutex() : MutexBase(true) {}
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bool tryLock();
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};
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typedef Locker<MutexBase> MutexLocker;
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class MutexTryLocker {
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WTF_MAKE_NONCOPYABLE(MutexTryLocker);
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public:
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MutexTryLocker(Mutex& mutex) : m_mutex(mutex), m_locked(mutex.tryLock()) {}
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~MutexTryLocker() {
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if (m_locked)
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m_mutex.unlock();
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}
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bool locked() const { return m_locked; }
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private:
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Mutex& m_mutex;
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bool m_locked;
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};
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} // namespace WTF
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using WTF::Mutex;
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using WTF::MutexBase;
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using WTF::MutexLocker;
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using WTF::MutexTryLocker;
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using WTF::RecursiveMutex;
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#endif // SKY_ENGINE_WTF_THREADINGPRIMITIVES_H_
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