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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.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/posix/rwlockimpl.h>
int pthread_rwlock_destroy(
pthread_rwlock_t *_rwlock
)
{
POSIX_RWLock_Control *the_rwlock;
Thread_queue_Context queue_context;
the_rwlock = _POSIX_RWLock_Get( _rwlock );
POSIX_RWLOCK_VALIDATE_OBJECT( the_rwlock );
_CORE_RWLock_Acquire( &the_rwlock->RWLock, &queue_context );
/*
* If there is at least one thread waiting, then do not delete it.
*/
if ( !_Thread_queue_Is_empty( &the_rwlock->RWLock.Queue.Queue ) ) {
_CORE_RWLock_Release( &the_rwlock->RWLock, &queue_context );
return EBUSY;
}
/*
* POSIX doesn't require behavior when it is locked.
*/
the_rwlock->flags = ~the_rwlock->flags;
_CORE_RWLock_Release( &the_rwlock->RWLock, &queue_context );
return 0;
}
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