source: rtems/cpukit/rtems/src/regiongetsegmentsize.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: 2.0 KB
Line 
1/*
2 *  Region 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/object.h>
19#include <rtems/rtems/options.h>
20#include <rtems/rtems/region.h>
21#include <rtems/score/states.h>
22#include <rtems/score/thread.h>
23#include <rtems/score/apimutex.h>
24
25/*PAGE
26 *
27 *  rtems_region_get_segment_size
28 *
29 *  This directive will return the size of the segment indicated
30 *
31 *  Input parameters:
32 *    id         - region id
33 *    segment    - segment address
34 *    size       - pointer to segment size in bytes
35 *
36 *  Output parameters:
37 *    size       - segment size in bytes filled in
38 *    RTEMS_SUCCESSFUL - if successful
39 *    error code - if unsuccessful
40 */
41
42rtems_status_code rtems_region_get_segment_size(
43  Objects_Id         id,
44  void              *segment,
45  size_t            *size
46)
47{
48  register Region_Control *the_region;
49  Objects_Locations        location;
50  Thread_Control          *executing;
51
52  if ( !segment )
53    return RTEMS_INVALID_ADDRESS;
54
55  if ( !size )
56    return RTEMS_INVALID_ADDRESS;
57
58  _RTEMS_Lock_allocator();
59  executing  = _Thread_Executing;
60  the_region = _Region_Get( id, &location );
61  switch ( location ) {
62    case OBJECTS_REMOTE:        /* this error cannot be returned */
63      _RTEMS_Unlock_allocator();
64      return RTEMS_INTERNAL_ERROR;
65
66    case OBJECTS_ERROR:
67      _RTEMS_Unlock_allocator();
68      return RTEMS_INVALID_ID;
69
70    case OBJECTS_LOCAL:
71
72      if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) {
73        _RTEMS_Unlock_allocator();
74        return RTEMS_SUCCESSFUL;
75      }
76      _RTEMS_Unlock_allocator();
77      return RTEMS_INVALID_ADDRESS;
78  }
79
80  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
81}
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