source: rtems/cpukit/rtems/src/regionextend.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: 2.5 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_extend
28 *
29 *  This directive attempts to grow a region of physical contiguous memory area
30 *  from which variable sized segments can be allocated.
31 *
32 *  Input parameters:
33 *    id         - id of region to grow
34 *    start      - starting address of memory area for extension
35 *    length     - physical length in bytes to grow the region
36 *
37 *  Output parameters:
38 *    RTEMS_SUCCESSFUL - if successful
39 *    error code       - if unsuccessful
40 */
41
42rtems_status_code rtems_region_extend(
43  Objects_Id          id,
44  void               *starting_address,
45  uint32_t            length
46)
47{
48  Region_Control     *the_region;
49  Objects_Locations   location;
50  uint32_t            amount_extended;
51  Heap_Extend_status  heap_status;
52  rtems_status_code   status;
53
54  if ( !starting_address )
55    return RTEMS_INVALID_ADDRESS;
56
57  status = RTEMS_SUCCESSFUL;
58
59  _RTEMS_Lock_allocator();                      /* to prevent deletion */
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      heap_status = _Heap_Extend(
73        &the_region->Memory,
74        starting_address,
75        length,
76        &amount_extended
77      );
78
79      switch ( heap_status ) {
80        case HEAP_EXTEND_SUCCESSFUL:
81          the_region->length                += amount_extended;
82          the_region->maximum_segment_size  += amount_extended;
83          break;
84        case HEAP_EXTEND_ERROR:
85          status = RTEMS_INVALID_ADDRESS;
86          break;
87        case HEAP_EXTEND_NOT_IMPLEMENTED:
88          status = RTEMS_NOT_IMPLEMENTED;
89          break;
90      }
91      _RTEMS_Unlock_allocator();
92      return( status );
93  }
94
95  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
96}
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