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/* ************************************************************************
* Copyright 2013 Advanced Micro Devices, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ************************************************************************/
#include <mutex.h>
#if defined(_MSC_VER)
#pragma warning(push,3)
#include <windows.h>
#pragma warning(pop)
mutex_t*
mutexInit(void)
{
HANDLE mutex;
mutex = CreateMutex(NULL, FALSE, NULL);
return (mutex_t*)mutex;
}
int
mutexDestroy(mutex_t *_mutex)
{
HANDLE mutex = (HANDLE)_mutex;
if (CloseHandle(mutex) == FALSE) {
/* Bad mutex, etc. */
return 1;
}
return 0;
}
int
mutexLock(mutex_t *_mutex)
{
HANDLE mutex = (HANDLE)_mutex;
DWORD rc;
rc = WaitForSingleObjectEx(mutex, INFINITE, FALSE);
if (rc != WAIT_OBJECT_0) {
/* Bad mutex, etc. */
return 1;
}
return 0;
}
int
mutexUnlock(mutex_t *_mutex)
{
HANDLE mutex = (HANDLE)_mutex;
if (ReleaseMutex(mutex) == FALSE) {
/* Bad mutex, etc. */
return 1;
}
return 0;
}
#else /* defined(_MSC_VER) */
#include <stdlib.h>
#include <pthread.h>
mutex_t*
mutexInit(void)
{
pthread_mutex_t *mutex;
mutex = calloc(1, sizeof(pthread_mutex_t));
if (mutex == NULL)
return NULL;
if (pthread_mutex_init(mutex, NULL) != 0) {
free(mutex);
return NULL;
}
return (mutex_t*)mutex;
}
int
mutexDestroy(mutex_t *_mutex)
{
pthread_mutex_t *mutex = (pthread_mutex_t*)_mutex;
if (mutex == NULL) {
/* Mutex is invalid */
return 1;
}
if (pthread_mutex_destroy(mutex) != 0) {
/* Mutex is busy or invalid */
return 1;
}
free(mutex);
return 0;
}
int
mutexLock(mutex_t *_mutex)
{
pthread_mutex_t *mutex = (pthread_mutex_t*)_mutex;
return (pthread_mutex_lock(mutex) == 0) ? 0 : 1;
}
int
mutexUnlock(mutex_t *_mutex)
{
pthread_mutex_t *mutex = (pthread_mutex_t*)_mutex;
return (pthread_mutex_unlock(mutex) == 0) ? 0 : 1;
}
#endif /* defined (_MSC_VER) */
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