blob: 1098f58905180037d807919ddd141787812d450f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <stdlib.h>
#include "malloc.h"
__ptr_t
memalign (alignment, size)
size_t alignment;
size_t size;
{
__ptr_t result;
unsigned long int adj;
result = malloc (size + alignment - 1);
if (result == NULL)
return NULL;
adj = (unsigned long int) ((unsigned long int) ((char *) result -
(char *) NULL)) % alignment;
if (adj != 0)
{
struct alignlist *l;
for (l = _aligned_blocks; l != NULL; l = l->next)
if (l->aligned == NULL)
/* This slot is free. Use it. */
break;
if (l == NULL)
{
l = (struct alignlist *) malloc (sizeof (struct alignlist));
if (l == NULL)
{
#if 1
free (result);
#else
_free_internal (result);
#endif
return NULL;
}
l->next = _aligned_blocks;
_aligned_blocks = l;
}
l->exact = result;
result = l->aligned = (char *) result + alignment - adj;
}
return result;
}
|
