mirror of https://github.com/axmolengine/axmol.git
125 lines
3.7 KiB
C++
125 lines
3.7 KiB
C++
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#ifndef CC_ALLOCATOR_MUTEX_H
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#define CC_ALLOCATOR_MUTEX_H
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/****************************************************************************
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Copyright (c) 2014 Chukong Technologies Inc.
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Author: Justin Graham (https://github.com/mannewalis)
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "platform/CCPlatformMacros.h"
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#if CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX
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#include "pthread.h"
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#define MUTEX pthread_mutex_t
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#define MUTEX_INIT(m) \
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pthread_mutexattr_t mta; \
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pthread_mutexattr_init(&mta); \
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pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_RECURSIVE); \
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pthread_mutex_init(&m, &mta)
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#define MUTEX_LOCK(m) \
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pthread_mutex_lock(&m);
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#define MUTEX_UNLOCK(m) \
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pthread_mutex_unlock(&m);
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#elif CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 || CC_TARGET_PLATFORM == CC_PLATFORM_WP8 || CC_TARGET_PLATFORM == CC_PLATFORM_WINRT
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#include "windows.h"
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#define MUTEX HANDLE
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#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32
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#define MUTEX_INIT(m) \
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m = CreateMutex(0, FALSE, 0)
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#define MUTEX_LOCK(m) \
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WaitForSingleObject(m, INFINITE)
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#elif CC_TARGET_PLATFORM == CC_PLATFORM_WP8 || CC_TARGET_PLATFORM == CC_PLATFORM_WINRT
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#define MUTEX_INIT(m) \
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m = CreateMutexEx(NULL,FALSE,0,NULL);
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#define MUTEX_LOCK(m) \
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WaitForSingleObjectEx(m, INFINITE, false)
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#endif
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#define MUTEX_UNLOCK(m) \
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ReleaseMutex(m)
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#else
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#message "Unsupported platform for AllocatorMutex, Locking semantics will not be supported"
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#define MUTEX
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#define MUTEX_INIT(...)
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#define MUTEX_LOCK(...)
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#define MUTEX_UNLOCK(...)
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#endif
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NS_CC_BEGIN
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NS_CC_ALLOCATOR_BEGIN
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// so we cannot use std::mutex because it allocates memory
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// which causes an infinite loop of death and exceptions.
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class AllocatorMutex
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{
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public:
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AllocatorMutex()
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{
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MUTEX_INIT(_mutex);
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}
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void lock()
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{
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MUTEX_LOCK(_mutex);
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}
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void unlock()
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{
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MUTEX_UNLOCK(_mutex);
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}
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protected:
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MUTEX _mutex;
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};
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#define LOCK(m) m.lock()
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#define UNLOCK(m) m.unlock()
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// @param implementation that provides a mutex with locking semantics.
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struct locking_semantics
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{
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AllocatorMutex _mutex;
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CC_ALLOCATOR_INLINE void lock()
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{
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LOCK(_mutex);
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}
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CC_ALLOCATOR_INLINE void unlock()
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{
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UNLOCK(_mutex);
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}
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};
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// @param implementation that provides lockless semantics that should optimize away.
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struct lockless_semantics
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{
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CC_ALLOCATOR_INLINE void lock() {}
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CC_ALLOCATOR_INLINE void unlock() {}
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};
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NS_CC_ALLOCATOR_END
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NS_CC_END
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#endif//CC_ALLOCATOR_MUTEX_H
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