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116 lines
2.7 KiB
116 lines
2.7 KiB
/*-------------------------------------------------------------------------
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* drawElements Thread Library
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* ---------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Unix implementation of mutex.
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*//*--------------------------------------------------------------------*/
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#include "deMutex.h"
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#if (DE_OS == DE_OS_UNIX || DE_OS == DE_OS_ANDROID || DE_OS == DE_OS_SYMBIAN || DE_OS == DE_OS_QNX || DE_OS == DE_OS_OSX || DE_OS == DE_OS_IOS)
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#include "deMemory.h"
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#include <pthread.h>
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/* \todo [2009-11-12 pyry] It is quite nasty to allocate mutex structs from heap. */
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DE_STATIC_ASSERT(sizeof(deMutex) >= sizeof(pthread_mutex_t*));
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deMutex deMutex_create (const deMutexAttributes* attributes)
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{
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pthread_mutexattr_t attr;
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int ret;
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pthread_mutex_t* mutex = deMalloc(sizeof(pthread_mutex_t));
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if (!mutex)
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return 0;
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if (pthread_mutexattr_init(&attr) != 0)
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{
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deFree(mutex);
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return 0;
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}
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#if defined(DE_DEBUG)
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if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK) != 0)
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#else
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if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL) != 0)
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#endif
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{
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pthread_mutexattr_destroy(&attr);
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deFree(mutex);
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return 0;
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}
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if (attributes)
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{
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if (attributes->flags & DE_MUTEX_RECURSIVE)
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{
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if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) != 0)
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{
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pthread_mutexattr_destroy(&attr);
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deFree(mutex);
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return 0;
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}
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}
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}
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ret = pthread_mutex_init(mutex, &attr);
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if (ret != 0)
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{
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pthread_mutexattr_destroy(&attr);
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deFree(mutex);
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return 0;
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}
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pthread_mutexattr_destroy(&attr);
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return (deMutex)mutex;
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}
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void deMutex_destroy (deMutex mutex)
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{
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pthread_mutex_t* pMutex = (pthread_mutex_t*)mutex;
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DE_ASSERT(pMutex);
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pthread_mutex_destroy(pMutex);
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deFree(pMutex);
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}
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void deMutex_lock (deMutex mutex)
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{
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int ret = pthread_mutex_lock((pthread_mutex_t*)mutex);
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DE_ASSERT(ret == 0);
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DE_UNREF(ret);
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}
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void deMutex_unlock (deMutex mutex)
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{
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int ret = pthread_mutex_unlock((pthread_mutex_t*)mutex);
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DE_ASSERT(ret == 0);
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DE_UNREF(ret);
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}
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deBool deMutex_tryLock (deMutex mutex)
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{
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return (pthread_mutex_trylock((pthread_mutex_t*)mutex) == 0);
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}
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#endif /* DE_OS */
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