source: rtems/cpukit/rtems/src/taskgetnote.c @ e980b219

4.104.114.84.95
Last change on this file since e980b219 was e980b219, checked in by Joel Sherrill <joel.sherrill@…>, on 05/06/04 at 19:21:40

2004-05-06 Joel Sherrill <joel@…>

PR 618/rtems

  • rtems/include/rtems/rtems/status.h, rtems/src/clockget.c, rtems/src/clockset.c, rtems/src/dpmemcreate.c, rtems/src/dpmemexternal2internal.c, rtems/src/dpmeminternal2external.c, rtems/src/eventmp.c, rtems/src/eventreceive.c, rtems/src/eventsend.c, rtems/src/msgqbroadcast.c, rtems/src/msgqcreate.c, rtems/src/msgqflush.c, rtems/src/msgqgetnumberpending.c, rtems/src/msgqreceive.c, rtems/src/msgqsubmit.c, rtems/src/partcreate.c, rtems/src/partdelete.c, rtems/src/partgetbuffer.c, rtems/src/ratemoncancel.c, rtems/src/ratemoncreate.c, rtems/src/ratemondelete.c, rtems/src/ratemongetstatus.c, rtems/src/ratemonident.c, rtems/src/ratemonperiod.c, rtems/src/regioncreate.c, rtems/src/regiondelete.c, rtems/src/regionextend.c, rtems/src/regiongetsegment.c, rtems/src/regiongetsegmentsize.c, rtems/src/regionreturnsegment.c, rtems/src/semcreate.c, rtems/src/semdelete.c, rtems/src/semflush.c, rtems/src/semident.c, rtems/src/taskcreate.c, rtems/src/taskgetnote.c, rtems/src/taskmode.c, rtems/src/taskrestart.c, rtems/src/taskresume.c, rtems/src/tasksetnote.c, rtems/src/tasksuspend.c, rtems/src/taskvariableadd.c, rtems/src/taskvariabledelete.c, rtems/src/taskvariableget.c, rtems/src/taskwakewhen.c, rtems/src/timercreate.c, rtems/src/timerdelete.c, rtems/src/timerfireafter.c, rtems/src/timerfirewhen.c, rtems/src/timerserverfireafter.c, rtems/src/timerserverfirewhen.c, score/include/rtems/score/object.h, score/src/coretodvalidate.c, score/src/objectnametoid.c: Add NULL checks.
  • Property mode set to 100644
File size: 2.7 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.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/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_get_note
34 *
35 *  This directive obtains the note from the specified notepad
36 *  of the specified thread.
37 *
38 *  Input parameters:
39 *    id      - thread id
40 *    notepad - notepad number
41 *    note    - pointer to note
42 *
43 *  Output parameters:
44 *    note             - filled in if successful
45 *    RTEMS_SUCCESSFUL - if successful
46 *    error code       - if unsuccessful
47 */
48
49rtems_status_code rtems_task_get_note(
50  Objects_Id  id,
51  uint32_t    notepad,
52  uint32_t   *note
53)
54{
55  register Thread_Control *the_thread;
56  Objects_Locations        location;
57  RTEMS_API_Control       *api;
58
59  if ( !note )
60    return RTEMS_INVALID_ADDRESS;
61
62  /*
63   *  NOTE:  There is no check for < RTEMS_NOTEPAD_FIRST because that would
64   *         be checking an unsigned number for being negative.
65   */
66
67  if ( notepad > RTEMS_NOTEPAD_LAST )
68    return RTEMS_INVALID_NUMBER;
69
70  /*
71   *  Optimize the most likely case to avoid the Thread_Dispatch.
72   */
73
74  if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ||
75       _Objects_Are_ids_equal( id, _Thread_Executing->Object.id ) ) {
76      api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];
77      *note = api->Notepads[ notepad ];
78      return RTEMS_SUCCESSFUL;
79  }
80
81  the_thread = _Thread_Get( id, &location );
82  switch ( location ) {
83
84    case OBJECTS_REMOTE:
85#if defined(RTEMS_MULTIPROCESSING)
86      _Thread_Executing->Wait.return_argument = note;
87
88      return _RTEMS_tasks_MP_Send_request_packet(
89        RTEMS_TASKS_MP_GET_NOTE_REQUEST,
90        id,
91        0,          /* Not used */
92        notepad,
93        0           /* Not used */
94      );
95#endif
96
97    case OBJECTS_ERROR:
98      return RTEMS_INVALID_ID;
99
100    case OBJECTS_LOCAL:
101      api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
102      *note = api->Notepads[ notepad ];
103      _Thread_Enable_dispatch();
104      return RTEMS_SUCCESSFUL;
105  }
106
107  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
108}
Note: See TracBrowser for help on using the repository browser.