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/*
* Rate Monotonic Manager
*
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* 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 <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;
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_Reset( &the_period->Timer );
} 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_Reset( &the_period->Timer );
} else
the_period->state = RATE_MONOTONIC_EXPIRED;
_Thread_Unnest_dispatch();
break;
}
}
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