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 | |
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; |
40 | |
41 | static 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 | |
48 | void 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 | |
60 | void *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 | |
68 | void *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 | |
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); |
78 | } |
79 | |
80 | void *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 | |
88 | void *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 | |
96 | char *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 | |
104 | char *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 | |
114 | void xfree(void *ptr) { |
115 | do_free(ptr); |
116 | } |
117 | |
118 | /* |
119 | Local Variables: |
120 | c-basic-offset:2 |
121 | comment-column:40 |
122 | End: |
123 | */ |