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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.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#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 )
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 */
}
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