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/*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <itron.h>
#include <rtems/itron/semaphore.h>
#include <rtems/itron/task.h>
#include <rtems/score/tod.h>
/*
* ref_sem - Reference Semaphore Status
*
* This function implements the ITRON 3.0 ref_sem() service.
*/
ER ref_sem(
ID semid,
T_RSEM *pk_rsem
)
{
ITRON_Semaphore_Control *the_semaphore;
Objects_Locations location;
if ( !pk_rsem )
return E_PAR; /* XXX check this error code */
the_semaphore = _ITRON_Semaphore_Get( semid, &location );
switch ( location ) {
case OBJECTS_REMOTE: /* Multiprocessing not supported */
case OBJECTS_ERROR:
return _ITRON_Semaphore_Clarify_get_id_error( semid );
case OBJECTS_LOCAL:
/*
* Fill in the current semaphore count
*/
pk_rsem->semcnt = _CORE_semaphore_Get_count( &the_semaphore->semaphore );
/*
* Fill in whether or not there is a waiting task
*/
if ( !_Thread_queue_First( &the_semaphore->semaphore.Wait_queue ) )
pk_rsem->wtsk = FALSE;
else
pk_rsem->wtsk = TRUE;
_Thread_Enable_dispatch();
return E_OK;
}
return E_OK;
}
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