source: rtems/cpukit/score/src/heapsizeofuserarea.c @ fff1b20

4.104.114.84.95
Last change on this file since fff1b20 was fff1b20, checked in by Joel Sherrill <joel.sherrill@…>, on 07/24/04 at 17:25:33

2004-07-24 Joel Sherrill <joel@…>

PR 659/rtems

  • score/src/heapsizeofuserarea.c: Check that address specified is in the heap.
  • Property mode set to 100644
File size: 1.7 KB
Line 
1/*
2 *  Heap Handler
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14
15#include <rtems/system.h>
16#include <rtems/score/sysstate.h>
17#include <rtems/score/heap.h>
18
19/*PAGE
20 *
21 *  _Heap_Size_of_user_area
22 *
23 *  This kernel routine returns the size of the memory area
24 *  given heap block.
25 *
26 *  Input parameters:
27 *    the_heap         - pointer to heap header
28 *    starting_address - starting address of the memory block to free.
29 *    size             - pointer to size of area
30 *
31 *  Output parameters:
32 *    size  - size of area filled in
33 *    TRUE  - if starting_address is valid heap address
34 *    FALSE - if starting_address is invalid heap address
35 */
36
37boolean _Heap_Size_of_user_area(
38  Heap_Control        *the_heap,
39  void                *starting_address,
40  uint32_t            *size
41)
42{
43  Heap_Block        *the_block;
44  Heap_Block        *next_block;
45  uint32_t           the_size;
46
47  if ( !_Addresses_Is_in_range(
48         starting_address, (void *)the_heap->start, (void *)the_heap->final ) )
49    return( FALSE );
50
51  the_block = _Heap_User_block_at( starting_address );
52 
53  if ( !_Heap_Is_block_in( the_heap, the_block ) )
54    return( FALSE );
55
56  if ( _Heap_Is_block_free( the_block ) )
57    return( FALSE );
58
59  the_size   = _Heap_Block_size( the_block );
60  next_block = _Heap_Block_at( the_block, the_size );
61
62  if ( !_Heap_Is_block_in( the_heap, next_block ) ||
63       (the_block->front_flag != next_block->back_flag) )
64    return( FALSE );
65
66  *size = the_size;
67  return( TRUE );
68}
69
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