1 /*
2 * inline.c --- Includes the inlined functions defined in the header
3 * files as standalone functions, in case the application program
4 * is compiled with inlining turned off.
5 *
6 * Copyright (C) 1993, 1994 Theodore Ts'o.
7 *
8 * %Begin-Header%
9 * This file may be redistributed under the terms of the GNU Library
10 * General Public License, version 2.
11 * %End-Header%
12 */
13
14 #ifndef _XOPEN_SOURCE
15 #define _XOPEN_SOURCE 600 /* for posix_memalign() */
16 #endif
17
18 #include "config.h"
19 #include <stdio.h>
20 #include <string.h>
21 #if HAVE_UNISTD_H
22 #include <unistd.h>
23 #endif
24 #include <fcntl.h>
25 #include <time.h>
26 #if HAVE_SYS_STAT_H
27 #include <sys/stat.h>
28 #endif
29 #if HAVE_SYS_TYPES_H
30 #include <sys/types.h>
31 #endif
32 #if HAVE_MALLOC_H
33 #include <malloc.h>
34 #endif
35
36 #include "ext2_fs.h"
37 #define INCLUDE_INLINE_FUNCS
38 #include "ext2fs.h"
39
40 /*
41 * We used to define this as an inline, but since we are now using
42 * autoconf-defined #ifdef's, we need to export this as a
43 * library-provided function exclusively.
44 */
ext2fs_get_memalign(unsigned long size,unsigned long align,void * ptr)45 errcode_t ext2fs_get_memalign(unsigned long size,
46 unsigned long align, void *ptr)
47 {
48 errcode_t retval = 0;
49 void **p = ptr;
50
51 if (align < 8)
52 align = 8;
53 #ifdef HAVE_POSIX_MEMALIGN
54 retval = posix_memalign(p, align, size);
55 if (retval == ENOMEM)
56 return EXT2_ET_NO_MEMORY;
57 #else /* !HAVE_POSIX_MEMALIGN */
58 #ifdef HAVE_MEMALIGN
59 *p = memalign(align, size);
60 if (*p == NULL) {
61 if (errno)
62 return errno;
63 else
64 return EXT2_ET_NO_MEMORY;
65 }
66 #else /* !HAVE_MEMALIGN */
67 #ifdef HAVE_VALLOC
68 if (align > sizeof(long long))
69 *p = valloc(size);
70 else
71 #endif
72 *p = malloc(size);
73 if ((uintptr_t) *p & (align - 1)) {
74 free(*p);
75 *p = 0;
76 }
77 if (*p == 0)
78 return EXT2_ET_NO_MEMORY;
79 #endif /* HAVE_MEMALIGN */
80 #endif /* HAVE_POSIX_MEMALIGN */
81 return retval;
82 }
83
84 #ifdef DEBUG
isaligned(void * ptr,unsigned long align)85 static int isaligned(void *ptr, unsigned long align)
86 {
87 return (((unsigned long) ptr & (align - 1)) == 0);
88 }
89
test_memalign(unsigned long align)90 static errcode_t test_memalign(unsigned long align)
91 {
92 void *ptr = 0;
93 errcode_t retval;
94
95 retval = ext2fs_get_memalign(32, align, &ptr);
96 if (!retval && !isaligned(ptr, align))
97 retval = EINVAL;
98 free(ptr);
99 printf("tst_memalign(%lu) is %s\n", align,
100 retval ? error_message(retval) : "OK");
101 return retval;
102 }
103
main(int argc,char ** argv)104 int main(int argc, char **argv)
105 {
106 int err = 0;
107
108 if (test_memalign(4))
109 err++;
110 if (test_memalign(32))
111 err++;
112 if (test_memalign(1024))
113 err++;
114 if (test_memalign(4096))
115 err++;
116 return err;
117 }
118 #endif
119