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revision 1.6, Wed Jun 12 20:38:41 2002 UTC revision 1.7, Thu Jun 13 22:05:09 2002 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - Aligned memory allocator -
5     *
6     *  This program is an implementation of a part of one or more MPEG-4
7     *  Video tools as specified in ISO/IEC 14496-2 standard.  Those intending
8     *  to use this software module in hardware or software products are
9     *  advised that its use may infringe existing patents or copyrights, and
10     *  any such use would be at such party's own risk.  The original
11     *  developer of this software module and his/her company, and subsequent
12     *  editors and their companies, will have no liability for use of this
13     *  software or modifications or derivatives thereof.
14     *
15     *  This program is free software ; you can redistribute it and/or modify
16     *  it under the terms of the GNU General Public License as published by
17     *  the Free Software Foundation ; either version 2 of the License, or
18     *  (at your option) any later version.
19     *
20     *  This program is distributed in the hope that it will be useful,
21     *  but WITHOUT ANY WARRANTY ; without even the implied warranty of
22     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23     *  GNU General Public License for more details.
24     *
25     *  You should have received a copy of the GNU General Public License
26     *  along with this program ; if not, write to the Free Software
27     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
28     *
29     ****************************************************************************/
30    /*****************************************************************************
31     *
32     *  History
33     *
34     *  - Thu Jun 13 23:50:07 2002 Added legal header
35     *
36     *  $Id$
37     *
38     ****************************************************************************/
39    
40    
41  #include <stdlib.h>  #include <stdlib.h>
42  #include <stdio.h>  #include <stdio.h>
43  #include "mem_align.h"  #include "mem_align.h"
44    
45    /*****************************************************************************
46     * xvid_malloc
47     *
48     * This function allocates 'size' bytes (usable by the user) on the heap and
49     * takes care of the requested 'alignment'.
50     * In order to align the allocated memory block, the xvid_malloc allocates
51     * 'size' bytes + 'alignment' bytes. So try to keep alignment very small
52     * when allocating small pieces of memory.
53     *
54     * NB : a block allocated by xvid_malloc _must_ be freed with xvid_free
55     *      (the libc free will return an error)
56     *
57     * Returned value : - NULL on error
58     *                  - Pointer to the allocated aligned block
59     *
60     ****************************************************************************/
61    
62  void *  void *
63  xvid_malloc(size_t size,  xvid_malloc(size_t size,
64                          uint8_t alignment)                          uint8_t alignment)
# Line 62  Line 119 
119    
120  }  }
121    
122    /*****************************************************************************
123     * xvid_free
124     *
125     * Free a previously 'xvid_malloc' allocated block. Does not free NULL
126     * references.
127     *
128     * Returned value : None.
129     *
130     ****************************************************************************/
131    
132  void  void
133  xvid_free(void *mem_ptr)  xvid_free(void *mem_ptr)
134  {  {
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