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/**
* @file
*
* @ingroup POSIXAPI
*
* @brief Function Releases a lock held on RWLock object referenced by rwlock
*/
/*
* 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.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/posix/rwlockimpl.h>
#include <rtems/posix/posixapi.h>
#include <string.h>
bool _POSIX_RWLock_Auto_initialization( POSIX_RWLock_Control *the_rwlock )
{
POSIX_RWLock_Control zero;
memset( &zero, 0, sizeof( zero ) );
if ( memcmp( the_rwlock, &zero, sizeof( *the_rwlock ) ) != 0 ) {
return false;
}
the_rwlock->flags = (uintptr_t) the_rwlock ^ POSIX_RWLOCK_MAGIC;
return true;
}
int pthread_rwlock_unlock(
pthread_rwlock_t *rwlock
)
{
POSIX_RWLock_Control *the_rwlock;
Status_Control status;
the_rwlock = _POSIX_RWLock_Get( rwlock );
POSIX_RWLOCK_VALIDATE_OBJECT( the_rwlock );
status = _CORE_RWLock_Surrender( &the_rwlock->RWLock );
return _POSIX_Get_error( status );
}
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