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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [itron/] [src/] [ref_sem.c] - Blame information for rev 173

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/*
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: ref_sem.c,v 1.2 2001-09-27 11:59:13 chris Exp $
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 */
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#include <itron.h>
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#include <rtems/itron/semaphore.h>
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#include <rtems/itron/task.h>
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#include <rtems/score/tod.h>
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/*
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 *  ref_sem - Reference Semaphore Status
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 *
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 *  This function implements the ITRON 3.0 ref_sem() service.
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 */
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ER ref_sem(
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  ID      semid,
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  T_RSEM *pk_rsem
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)
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{
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  ITRON_Semaphore_Control *the_semaphore;
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  Objects_Locations        location;
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  if ( !pk_rsem )
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    return E_PAR;   /* XXX check this error code */
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  the_semaphore = _ITRON_Semaphore_Get( semid, &location );
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  switch ( location ) {
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    case OBJECTS_REMOTE:               /* Multiprocessing not supported */
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    case OBJECTS_ERROR:
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      return _ITRON_Semaphore_Clarify_get_id_error( semid );
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    case OBJECTS_LOCAL:
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      /*
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       *  Fill in the current semaphore count
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       */
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      pk_rsem->semcnt = _CORE_semaphore_Get_count( &the_semaphore->semaphore );
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      /*
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       *  Fill in whether or not there is a waiting task
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       */
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      if ( !_Thread_queue_First( &the_semaphore->semaphore.Wait_queue ) )
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        pk_rsem->wtsk = FALSE;
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      else
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        pk_rsem->wtsk = TRUE;
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      _Thread_Enable_dispatch();
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      return E_OK;
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  }
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  return E_OK;
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}
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