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Remove arch tags throughout
[disorder] / lib / mem.c
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460b9539 1/*
2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2006 Richard Kettlewell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21#include <config.h>
22#include "types.h"
23
24#include <gc.h>
25#include <errno.h>
26#include <string.h>
27#include <stdio.h>
28#include <stdlib.h>
29
30#include "mem.h"
31#include "log.h"
32#include "printf.h"
33
34#include "disorder.h"
35
36static void *(*do_malloc)(size_t) = GC_malloc;
37static void *(*do_realloc)(void *, size_t) = GC_realloc;
38static void *(*do_malloc_atomic)(size_t) = GC_malloc_atomic;
39static void (*do_free)(void *) = GC_free;
40
41static void *malloc_and_zero(size_t n) {
42 void *ptr = malloc(n);
43
44 if(ptr) memset(ptr, 0, n);
45 return ptr;
46}
47
48void mem_init(int gc) {
49 const char *e;
50
51 if(!gc || ((e = getenv("DISORDER_GC")) && !strcmp(e, "no"))) {
52 do_malloc = malloc_and_zero;
53 do_malloc_atomic = malloc;
54 do_realloc = realloc;
55 do_free = free;
56 } else
57 GC_init();
58}
59
60void *xmalloc(size_t n) {
61 void *ptr;
62
63 if(!(ptr = do_malloc(n)) && n)
64 fatal(errno, "error allocating memory");
65 return ptr;
66}
67
68void *xrealloc(void *ptr, size_t n) {
69 if(!(ptr = do_realloc(ptr, n)) && n)
70 fatal(errno, "error allocating memory");
71 return ptr;
72}
73
74void *xcalloc(size_t count, size_t size) {
75 if(count > SIZE_MAX / size)
76 fatal(0, "excessively large calloc");
77 return xmalloc(count * size);
78}
79
80void *xmalloc_noptr(size_t n) {
81 void *ptr;
82
83 if(!(ptr = do_malloc_atomic(n)) && n)
84 fatal(errno, "error allocating memory");
85 return ptr;
86}
87
88void *xrealloc_noptr(void *ptr, size_t n) {
89 if(ptr == 0)
90 return xmalloc_noptr(n);
91 if(!(ptr = do_realloc(ptr, n)) && n)
92 fatal(errno, "error allocating memory");
93 return ptr;
94}
95
96char *xstrdup(const char *s) {
97 char *t;
98
99 if(!(t = do_malloc_atomic(strlen(s) + 1)))
100 fatal(errno, "error allocating memory");
101 return strcpy(t, s);
102}
103
104char *xstrndup(const char *s, size_t n) {
105 char *t;
106
107 if(!(t = do_malloc_atomic(n + 1)))
108 fatal(errno, "error allocating memory");
109 memcpy(t, s, n);
110 t[n] = 0;
111 return t;
112}
113
114void xfree(void *ptr) {
115 do_free(ptr);
116}
117
118/*
119Local Variables:
120c-basic-offset:2
121comment-column:40
122End:
123*/