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/**
* @file
*
* @brief Destroy a RWLock
* @ingroup POSIXAPI
*/
/*
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/posix/rwlockimpl.h>
#include <rtems/score/threadqimpl.h>
/**
* This directive allows a thread to delete a rwlock specified by
* the rwlock id. The rwlock is freed back to the inactive
* rwlock chain.
*
* @param[in] rwlock is the rwlock id
*
* @return This method returns 0 if there was not an
* error. Otherwise, a status code is returned indicating the
* source of the error.
*/
int pthread_rwlock_destroy(
pthread_rwlock_t *rwlock
)
{
POSIX_RWLock_Control *the_rwlock = NULL;
Objects_Locations location;
if ( !rwlock )
return EINVAL;
the_rwlock = _POSIX_RWLock_Get( rwlock, &location );
switch ( location ) {
case OBJECTS_LOCAL:
/*
* If there is at least one thread waiting, then do not delete it.
*/
if ( _Thread_queue_First( &the_rwlock->RWLock.Wait_queue ) != NULL ) {
_Objects_Put( &the_rwlock->Object );
return EBUSY;
}
/*
* POSIX doesn't require behavior when it is locked.
*/
_Objects_Close( &_POSIX_RWLock_Information, &the_rwlock->Object );
_POSIX_RWLock_Free( the_rwlock );
_Objects_Put( &the_rwlock->Object );
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
return EINVAL;
}
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