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/*
Copyright (C) 2008 Andreas Baumann <abaumann@yahoo.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "threads/mutex.h"
#if defined HAVE_PTHREADS
#include <errno.h> /* for EXXX values */
#include <assert.h> /* for assertions */
wolf_error_t wolf_mutex_init( wolf_mutex_t *mutex ) {
pthread_mutexattr_t attr;
int res;
/* intialize mutex attribute object */
res = pthread_mutexattr_init( &attr );
if( res == ENOMEM ) {
return WOLF_ERR_OUT_OF_MEMORY;
} else if( res == EINVAL ) {
return WOLF_ERR_INVALID_VALUE;
} else if( res != 0 ) {
return WOLF_ERR_INTERNAL;
}
/* set default values */
res = pthread_mutexattr_settype( &attr, WOLF_MUTEX_DEFAULT_ATTR );
if( res != 0 ) {
res = pthread_mutexattr_destroy( &attr );
assert( res == 0 );
return WOLF_ERR_INTERNAL;
}
/* initialize the mutex */
res = pthread_mutex_init( mutex, &attr );
if( res == ENOMEM ) {
return WOLF_ERR_OUT_OF_MEMORY;
} else if( res == EINVAL ) {
return WOLF_ERR_INVALID_VALUE;
} else if( res != 0 ) {
return WOLF_ERR_INTERNAL;
}
/* destroy mutex attributes */
res = pthread_mutexattr_destroy( &attr );
assert( res == 0 );
return WOLF_OK;
}
wolf_error_t wolf_mutex_destroy( wolf_mutex_t *mutex ) {
int res;
res = pthread_mutex_destroy( mutex );
if( res == EINVAL ) {
return WOLF_ERR_INVALID_VALUE;
} else if( res != 0 ) {
return WOLF_ERR_INTERNAL;
}
return WOLF_OK;
}
#endif /* defined HAVE_PTHREADS */
#if defined _WIN32
wolf_error_t wolf_mutex_init( wolf_mutex_t *mutex ) {
InitializeCriticalSection( mutex );
return WOLF_OK;
}
wolf_error_t wolf_mutex_destroy( wolf_mutex_t *mutex ) {
DeleteCriticalSection( mutex );
return WOLF_OK;
}
#endif /* defined _WIN32 */
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