1/*
2 * memory wrappers
3 *
4 * Copyright (c) Artem Bityutskiy, 2007, 2008
5 * Copyright 2001, 2002 Red Hat, Inc.
6 *           2001 David A. Schleef <ds@lineo.com>
7 *           2002 Axis Communications AB
8 *           2001, 2002 Erik Andersen <andersen@codepoet.org>
9 *           2004 University of Szeged, Hungary
10 *           2006 KaiGai Kohei <kaigai@ak.jp.nec.com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
20 * the GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27#ifndef __MTD_UTILS_XALLOC_H__
28#define __MTD_UTILS_XALLOC_H__
29
30#include <stdlib.h>
31#include <string.h>
32
33/*
34 * Mark these functions as unused so that gcc does not emit warnings
35 * when people include this header but don't use every function.
36 */
37
38__attribute__((unused))
39static void *xmalloc(size_t size)
40{
41	void *ptr = malloc(size);
42
43	if (ptr == NULL && size != 0)
44		sys_errmsg_die("out of memory");
45	return ptr;
46}
47
48__attribute__((unused))
49static void *xcalloc(size_t nmemb, size_t size)
50{
51	void *ptr = calloc(nmemb, size);
52
53	if (ptr == NULL && nmemb != 0 && size != 0)
54		sys_errmsg_die("out of memory");
55	return ptr;
56}
57
58__attribute__((unused))
59static void *xzalloc(size_t size)
60{
61	return xcalloc(1, size);
62}
63
64__attribute__((unused))
65static void *xrealloc(void *ptr, size_t size)
66{
67	ptr = realloc(ptr, size);
68	if (ptr == NULL && size != 0)
69		sys_errmsg_die("out of memory");
70	return ptr;
71}
72
73__attribute__((unused))
74static char *xstrdup(const char *s)
75{
76	char *t;
77
78	if (s == NULL)
79		return NULL;
80	t = strdup(s);
81	if (t == NULL)
82		sys_errmsg_die("out of memory");
83	return t;
84}
85
86#ifdef _GNU_SOURCE
87#include <stdarg.h>
88
89__attribute__((unused))
90static int xasprintf(char **strp, const char *fmt, ...)
91{
92	int cnt;
93	va_list ap;
94
95	va_start(ap, fmt);
96	cnt = vasprintf(strp, fmt, ap);
97	va_end(ap);
98
99	if (cnt == -1)
100		sys_errmsg_die("out of memory");
101
102	return cnt;
103}
104#endif
105
106#endif /* !__MTD_UTILS_XALLOC_H__ */
107