2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2006 Richard Kettlewell
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.
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.
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
36 static void *(*do_malloc)(size_t) = GC_malloc;
37 static void *(*do_realloc)(void *, size_t) = GC_realloc;
38 static void *(*do_malloc_atomic)(size_t) = GC_malloc_atomic;
39 static void (*do_free)(void *) = GC_free;
41 static void *malloc_and_zero(size_t n) {
42 void *ptr = malloc(n);
44 if(ptr) memset(ptr, 0, n);
48 void mem_init(int gc) {
51 if(!gc || ((e = getenv("DISORDER_GC")) && !strcmp(e, "no"))) {
52 do_malloc = malloc_and_zero;
53 do_malloc_atomic = malloc;
60 void *xmalloc(size_t n) {
63 if(!(ptr = do_malloc(n)) && n)
64 fatal(errno, "error allocating memory");
68 void *xrealloc(void *ptr, size_t n) {
69 if(!(ptr = do_realloc(ptr, n)) && n)
70 fatal(errno, "error allocating memory");
74 void *xcalloc(size_t count, size_t size) {
75 if(count > SIZE_MAX / size)
76 fatal(0, "excessively large calloc");
77 return xmalloc(count * size);
80 void *xmalloc_noptr(size_t n) {
83 if(!(ptr = do_malloc_atomic(n)) && n)
84 fatal(errno, "error allocating memory");
88 void *xrealloc_noptr(void *ptr, size_t n) {
90 return xmalloc_noptr(n);
91 if(!(ptr = do_realloc(ptr, n)) && n)
92 fatal(errno, "error allocating memory");
96 char *xstrdup(const char *s) {
99 if(!(t = do_malloc_atomic(strlen(s) + 1)))
100 fatal(errno, "error allocating memory");
104 char *xstrndup(const char *s, size_t n) {
107 if(!(t = do_malloc_atomic(n + 1)))
108 fatal(errno, "error allocating memory");
114 void xfree(void *ptr) {