source: rtems/cpukit/rtems/src/ratemongetstatus.c @ 8ef3818

4.104.114.84.95
Last change on this file since 8ef3818 was 08311cc3, checked in by Joel Sherrill <joel.sherrill@…>, on 11/17/99 at 17:51:34

Updated copyright notice.

  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2 *  Rate Monotonic Manager
3 *
4 *
5 *  COPYRIGHT (c) 1989-1999.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.OARcorp.com/rtems/license.html.
11 *
12 *  $Id$
13 */
14
15#include <rtems/system.h>
16#include <rtems/rtems/status.h>
17#include <rtems/rtems/support.h>
18#include <rtems/score/isr.h>
19#include <rtems/score/object.h>
20#include <rtems/rtems/ratemon.h>
21#include <rtems/score/thread.h>
22
23/*PAGE
24 *
25 *  rtems_rate_monotonic_get_status
26 *
27 *  This directive allows a thread to obtain status information on a
28 *  period.
29 *
30 *  Input parameters:
31 *    id     - rate monotonic id
32 *    status - pointer to status control block
33 *
34 *  Output parameters:
35 *    RTEMS_SUCCESSFUL - if successful
36 *    error code        - if unsuccessful
37 *
38 */
39
40rtems_status_code rtems_rate_monotonic_get_status(
41  Objects_Id                           id,
42  rtems_rate_monotonic_period_status  *status
43)
44{
45  Objects_Locations              location;
46  Rate_monotonic_Control        *the_period;
47
48  if ( status == NULL )
49    return RTEMS_INVALID_ADDRESS;
50
51  the_period = _Rate_monotonic_Get( id, &location );
52  switch ( location ) {
53    case OBJECTS_REMOTE:            /* should never return this */
54      return RTEMS_INTERNAL_ERROR;
55
56    case OBJECTS_ERROR:
57      return RTEMS_INVALID_ID;
58
59    case OBJECTS_LOCAL:
60      status->state = the_period->state;
61
62      if ( status->state == RATE_MONOTONIC_INACTIVE ) {
63        status->ticks_since_last_period = 0;
64        status->ticks_executed_since_last_period = 0;
65      } else {
66        status->ticks_since_last_period =
67          _Watchdog_Ticks_since_boot - the_period->time_at_period;
68
69        status->ticks_executed_since_last_period =
70          the_period->owner->ticks_executed -
71            the_period->owner_ticks_executed_at_period;
72      }
73
74      _Thread_Enable_dispatch();
75      return RTEMS_SUCCESSFUL;
76  }
77
78  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
79}
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