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: ratemongetstatus.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_get_status

 *

 *  This directive allows a thread to obtain status information on a

 *  period.

 *

 *  Input parameters:

 *    id     - rate monotonic id

 *    status - pointer to status control block

 *

 *  Output parameters:

 *    RTEMS_SUCCESSFUL - if successful

 *    error code        - if unsuccessful

 *

 */

rtems_status_code rtems_rate_monotonic_get_status(

  Objects_Id                           id,

  rtems_rate_monotonic_period_status  *status

)

{

  Objects_Locations              location;

  Rate_monotonic_Control        *the_period;

  if ( status == NULL )

    return RTEMS_INVALID_ADDRESS;

  the_period = _Rate_monotonic_Get( id, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:            /* should never return this */

      return RTEMS_INTERNAL_ERROR;

    case OBJECTS_ERROR:

      return RTEMS_INVALID_ID;

    case OBJECTS_LOCAL:

      status->state = the_period->state;

      if ( status->state == RATE_MONOTONIC_INACTIVE ) {

        status->ticks_since_last_period = 0;

        status->ticks_executed_since_last_period = 0;

      } else {

        status->ticks_since_last_period =

          _Watchdog_Ticks_since_boot - the_period->time_at_period;

        status->ticks_executed_since_last_period =

          the_period->owner->ticks_executed -

            the_period->owner_ticks_executed_at_period;

      }

      _Thread_Enable_dispatch();

      return RTEMS_SUCCESSFUL;

  }

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

}