source: rtems/cpukit/rtems/src/tasksetnote.c @ fed6210d

4.104.114.84.95
Last change on this file since fed6210d 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: 2.5 KB
Line 
1/*
2 *  RTEMS Task 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/rtems/modes.h>
19#include <rtems/score/object.h>
20#include <rtems/score/stack.h>
21#include <rtems/score/states.h>
22#include <rtems/rtems/tasks.h>
23#include <rtems/score/thread.h>
24#include <rtems/score/threadq.h>
25#include <rtems/score/tod.h>
26#include <rtems/score/userext.h>
27#include <rtems/score/wkspace.h>
28#include <rtems/score/apiext.h>
29#include <rtems/score/sysstate.h>
30
31/*PAGE
32 *
33 * rtems_task_set_note
34 *
35 *  This directive sets the specified notepad contents to the given
36 *  note.
37 *
38 *  Input parameters:
39 *    id      - thread id
40 *    notepad - notepad number
41 *    note    - note value
42 *
43 *  Output parameters:
44 *    RTEMS_SUCCESSFUL - if successful
45 *    error code        - if unsuccessful
46 */
47
48rtems_status_code rtems_task_set_note(
49  Objects_Id id,
50  unsigned32 notepad,
51  unsigned32 note
52)
53{
54  register Thread_Control *the_thread;
55  Objects_Locations        location;
56  RTEMS_API_Control       *api;
57
58  /*
59   *  NOTE:  There is no check for < RTEMS_NOTEPAD_FIRST because that would
60   *         be checking an unsigned number for being negative.
61   */
62
63  if ( notepad > RTEMS_NOTEPAD_LAST )
64    return RTEMS_INVALID_NUMBER;
65
66  /*
67   *  Optimize the most likely case to avoid the Thread_Dispatch.
68   */
69
70  if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ||
71       _Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) {
72      api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];
73      api->Notepads[ notepad ] = note;
74      return RTEMS_SUCCESSFUL;
75  }
76
77  the_thread = _Thread_Get( id, &location );
78  switch ( location ) {
79
80    case OBJECTS_REMOTE:
81#if defined(RTEMS_MULTIPROCESSING)
82      return _RTEMS_tasks_MP_Send_request_packet(
83        RTEMS_TASKS_MP_SET_NOTE_REQUEST,
84        id,
85        0,          /* Not used */
86        notepad,
87        note
88      );
89#endif
90
91    case OBJECTS_ERROR:
92      return RTEMS_INVALID_ID;
93
94    case OBJECTS_LOCAL:
95      api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
96      api->Notepads[ notepad ] = note;
97      _Thread_Enable_dispatch();
98      return RTEMS_SUCCESSFUL;
99  }
100
101  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
102}
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