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/**
* @file
*
* @brief Obtain a Write Lock on a RWlock Instance
* @ingroup POSIXAPI
*/
/*
* POSIX RWLock Manager -- Obtain a Write Lock 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.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/posix/rwlockimpl.h>
#include <rtems/score/threadimpl.h>
THREAD_WAIT_QUEUE_OBJECT_ASSERT( POSIX_RWLock_Control, RWLock.Wait_queue );
int pthread_rwlock_wrlock(
pthread_rwlock_t *rwlock
)
{
POSIX_RWLock_Control *the_rwlock;
ISR_lock_Context lock_context;
Thread_Control *executing;
the_rwlock = _POSIX_RWLock_Get( rwlock, &lock_context );
if ( the_rwlock == NULL ) {
return EINVAL;
}
executing = _Thread_Executing;
_CORE_RWLock_Seize_for_writing(
&the_rwlock->RWLock,
executing,
true, /* do not timeout -- wait forever */
0,
&lock_context
);
return _POSIX_RWLock_Translate_core_RWLock_return_code(
(CORE_RWLock_Status) executing->Wait.return_code
);
}
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