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/*
* POSIX RWLock Manager -- Release a lock held on a RWLock Instance
*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/system.h>
#include <rtems/posix/rwlock.h>
/*
* pthread_rwlock_unlock
*
* This directive attempts to release a lock on an RWLock.
*
* Input parameters:
* rwlock - pointer to rwlock id
*
* Output parameters:
* 0 - if successful
* error code - if unsuccessful
*/
int pthread_rwlock_unlock(
pthread_rwlock_t *rwlock
)
{
POSIX_RWLock_Control *the_rwlock;
Objects_Locations location;
CORE_RWLock_Status status;
if ( !rwlock )
return EINVAL;
the_rwlock = _POSIX_RWLock_Get( rwlock, &location );
switch ( location ) {
case OBJECTS_LOCAL:
status = _CORE_RWLock_Release( &the_rwlock->RWLock );
_Thread_Enable_dispatch();
return _POSIX_RWLock_Translate_core_RWLock_return_code( status );
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
return EINVAL;
}
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