source: rtems/cpukit/rtems/src/ratemoncreate.c @ 9f78139

Last change on this file since 9f78139 was 9f78139, checked in by Joel Sherrill <joel.sherrill@…>, on 03/17/05 at 14:24:35

2005-03-17 Joel Sherrill <joel@…>

PR 745/rtems

  • src/ratemoncreate.c, src/timercreate.c: Make sure internal timer structures are initialized so object control reuse is safe.
  • Property mode set to 100644
File size: 1.7 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.rtems.com/license/LICENSE.
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_create
26 *
27 *  This directive creates a rate monotonic timer and performs
28 *  some initialization.
29 *
30 *  Input parameters:
31 *    name - name of period
32 *    id   - pointer to rate monotonic id
33 *
34 *  Output parameters:
35 *    id               - rate monotonic id
36 *    RTEMS_SUCCESSFUL - if successful
37 *    error code       - if unsuccessful
38 */
39
40rtems_status_code rtems_rate_monotonic_create(
41  rtems_name    name,
42  Objects_Id   *id
43)
44{
45  Rate_monotonic_Control *the_period;
46
47  if ( !rtems_is_name_valid( name ) )
48    return RTEMS_INVALID_NAME;
49
50  if ( !id )
51    return RTEMS_INVALID_ADDRESS;
52
53  _Thread_Disable_dispatch();            /* to prevent deletion */
54
55  the_period = _Rate_monotonic_Allocate();
56
57  if ( !the_period ) {
58    _Thread_Enable_dispatch();
59    return RTEMS_TOO_MANY;
60  }
61
62  the_period->owner = _Thread_Executing;
63  the_period->state = RATE_MONOTONIC_INACTIVE;
64
65  _Watchdog_Initialize( &the_period->Timer, NULL, 0, NULL );
66
67  _Objects_Open(
68    &_Rate_monotonic_Information,
69    &the_period->Object,
70    (Objects_Name) name
71  );
72
73  *id = the_period->Object.id;
74  _Thread_Enable_dispatch();
75  return RTEMS_SUCCESSFUL;
76}
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