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/*

 *  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.

 *

 *  ratemontimeout.c,v 1.3 2000/09/29 14:48:17 joel 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

 *

 *  _Rate_monotonic_Timeout

 *

 *  This routine processes a period ending.  If the owning thread

 *  is waiting for the period, that thread is unblocked and the

 *  period reinitiated.  Otherwise, the period is expired.

 *  This routine is called by the watchdog handler.

 *

 *  Input parameters:

 *    id - period id

 *

 *  Output parameters: NONE

 */

void _Rate_monotonic_Timeout(

  Objects_Id  id,

  void       *ignored

)

{

  Rate_monotonic_Control *the_period;

  Objects_Locations       location;

  Thread_Control         *the_thread;

  /*

   *  When we get here, the Timer is already off the chain so we do not

   *  have to worry about that -- hence no _Watchdog_Remove().

   */

  the_period = _Rate_monotonic_Get( id, &location );

  switch ( location ) {

    case OBJECTS_REMOTE:  /* impossible */

    case OBJECTS_ERROR:

      break;

    case OBJECTS_LOCAL:

      the_thread = the_period->owner;

      if ( _States_Is_waiting_for_period( the_thread->current_state ) &&

            the_thread->Wait.id == the_period->Object.id ) {

        _Thread_Unblock( the_thread );

        the_period->owner_ticks_executed_at_period =

          the_thread->ticks_executed;

        the_period->time_at_period = _Watchdog_Ticks_since_boot;

        _Watchdog_Insert_ticks( &the_period->Timer, the_period->next_length );

      } else if ( the_period->state == RATE_MONOTONIC_OWNER_IS_BLOCKING ) {

        the_period->state = RATE_MONOTONIC_EXPIRED_WHILE_BLOCKING;

        the_period->owner_ticks_executed_at_period =

          the_thread->ticks_executed;

        the_period->time_at_period = _Watchdog_Ticks_since_boot;

        _Watchdog_Insert_ticks( &the_period->Timer, the_period->next_length );

      } else

        the_period->state = RATE_MONOTONIC_EXPIRED;

      _Thread_Unnest_dispatch();

      break;

  }

}