source: rtems/cpukit/rtems/src/regiongetsegmentsize.c @ 54d540f

4.104.114.84.95
Last change on this file since 54d540f 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: 1.8 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.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/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
24/*PAGE
25 *
26 *  rtems_region_get_segment_size
27 *
28 *  This directive will return the size of the segment indicated
29 *
30 *  Input parameters:
31 *    id         - region id
32 *    segment    - segment address
33 *    size       - pointer to segment size in bytes
34 *
35 *  Output parameters:
36 *    size       - segment size in bytes filled in
37 *    RTEMS_SUCCESSFUL - if successful
38 *    error code - if unsuccessful
39 */
40
41rtems_status_code rtems_region_get_segment_size(
42  Objects_Id         id,
43  void              *segment,
44  unsigned32        *size
45)
46{
47  register Region_Control *the_region;
48  Objects_Locations        location;
49  Thread_Control          *executing;
50
51  executing  = _Thread_Executing;
52  the_region = _Region_Get( id, &location );
53  switch ( location ) {
54    case OBJECTS_REMOTE:        /* this error cannot be returned */
55      return RTEMS_INTERNAL_ERROR;
56
57    case OBJECTS_ERROR:
58      return RTEMS_INVALID_ID;
59
60    case OBJECTS_LOCAL:
61
62      if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) {
63        _Thread_Enable_dispatch();
64        return RTEMS_SUCCESSFUL;
65      }
66      _Thread_Enable_dispatch();
67      return RTEMS_INVALID_ADDRESS;
68  }
69
70  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
71}
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