Subversion Repositories openrisc_2011-10-31

/*

 *  Rate Monotonic Manager

 *

 *

 *  COPYRIGHT (c) 1989-1999.

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: ratemoncancel.c,v 1.2 2001-09-27 11:59:19 chris Exp $

 */

#include <rtems/system.h>

#include <rtems/rtems/status.h>

#include <rtems/rtems/support.h>

#include <rtems/score/isr.h>

#include <rtems/score/object.h>

#include <rtems/rtems/ratemon.h>

#include <rtems/score/thread.h>

/*PAGE

 *

 *  rtems_rate_monotonic_cancel

 *

 *  This directive allows a thread to cancel a rate monotonic timer.

 *

 *  Input parameters:

 *    id - rate monotonic id

 *

 *  Output parameters:

 *    RTEMS_SUCCESSFUL - if successful and caller is not the owning thread

 *    error code        - if unsuccessful

 */

rtems_status_code rtems_rate_monotonic_cancel(

  Objects_Id id

)

{

  Rate_monotonic_Control *the_period;

  Objects_Locations              location;

  the_period = _Rate_monotonic_Get( id, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:

      return RTEMS_INTERNAL_ERROR;  /* should never return this */

    case OBJECTS_ERROR:

      return RTEMS_INVALID_ID;

    case OBJECTS_LOCAL:

      if ( !_Thread_Is_executing( the_period->owner ) ) {

        _Thread_Enable_dispatch();

        return RTEMS_NOT_OWNER_OF_RESOURCE;

      }

      (void) _Watchdog_Remove( &the_period->Timer );

      the_period->state = RATE_MONOTONIC_INACTIVE;

      _Thread_Enable_dispatch();

      return RTEMS_SUCCESSFUL;

  }

  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */

}