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/**
* @file
*
* @brief Attempt to Obtain a Write Lock on a RWLock Instance
* @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>
#include <rtems/posix/posixapi.h>
int pthread_rwlock_trywrlock(
pthread_rwlock_t *rwlock
)
{
POSIX_RWLock_Control *the_rwlock;
Thread_queue_Context queue_context;
Status_Control status;
the_rwlock = _POSIX_RWLock_Get( rwlock, &queue_context );
if ( the_rwlock == NULL ) {
return EINVAL;
}
status = _CORE_RWLock_Seize_for_writing(
&the_rwlock->RWLock,
_Thread_Executing,
false, /* we are not willing to wait */
0,
&queue_context
);
return _POSIX_Get_error( status );
}
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