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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> |
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29 | #include <assert.h> |
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30 | |
31 | #include "mem.h" |
32 | #include "log.h" |
33 | #include "printf.h" |
34 | |
35 | #include "disorder.h" |
36 | |
37 | static void *(*do_malloc)(size_t) = GC_malloc; |
38 | static void *(*do_realloc)(void *, size_t) = GC_realloc; |
39 | static void *(*do_malloc_atomic)(size_t) = GC_malloc_atomic; |
40 | static void (*do_free)(void *) = GC_free; |
41 | |
42 | static void *malloc_and_zero(size_t n) { |
43 | void *ptr = malloc(n); |
44 | |
45 | if(ptr) memset(ptr, 0, n); |
46 | return ptr; |
47 | } |
48 | |
49 | void mem_init(int gc) { |
50 | const char *e; |
51 | |
52 | if(!gc || ((e = getenv("DISORDER_GC")) && !strcmp(e, "no"))) { |
53 | do_malloc = malloc_and_zero; |
54 | do_malloc_atomic = malloc; |
55 | do_realloc = realloc; |
56 | do_free = free; |
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57 | } else { |
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58 | GC_init(); |
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59 | assert(GC_all_interior_pointers); |
60 | } |
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61 | } |
62 | |
63 | void *xmalloc(size_t n) { |
64 | void *ptr; |
65 | |
66 | if(!(ptr = do_malloc(n)) && n) |
67 | fatal(errno, "error allocating memory"); |
68 | return ptr; |
69 | } |
70 | |
71 | void *xrealloc(void *ptr, size_t n) { |
72 | if(!(ptr = do_realloc(ptr, n)) && n) |
73 | fatal(errno, "error allocating memory"); |
74 | return ptr; |
75 | } |
76 | |
77 | void *xcalloc(size_t count, size_t size) { |
78 | if(count > SIZE_MAX / size) |
79 | fatal(0, "excessively large calloc"); |
80 | return xmalloc(count * size); |
81 | } |
82 | |
83 | void *xmalloc_noptr(size_t n) { |
84 | void *ptr; |
85 | |
86 | if(!(ptr = do_malloc_atomic(n)) && n) |
87 | fatal(errno, "error allocating memory"); |
88 | return ptr; |
89 | } |
90 | |
91 | void *xrealloc_noptr(void *ptr, size_t n) { |
92 | if(ptr == 0) |
93 | return xmalloc_noptr(n); |
94 | if(!(ptr = do_realloc(ptr, n)) && n) |
95 | fatal(errno, "error allocating memory"); |
96 | return ptr; |
97 | } |
98 | |
99 | char *xstrdup(const char *s) { |
100 | char *t; |
101 | |
102 | if(!(t = do_malloc_atomic(strlen(s) + 1))) |
103 | fatal(errno, "error allocating memory"); |
104 | return strcpy(t, s); |
105 | } |
106 | |
107 | char *xstrndup(const char *s, size_t n) { |
108 | char *t; |
109 | |
110 | if(!(t = do_malloc_atomic(n + 1))) |
111 | fatal(errno, "error allocating memory"); |
112 | memcpy(t, s, n); |
113 | t[n] = 0; |
114 | return t; |
115 | } |
116 | |
117 | void xfree(void *ptr) { |
118 | do_free(ptr); |
119 | } |
120 | |
121 | /* |
122 | Local Variables: |
123 | c-basic-offset:2 |
124 | comment-column:40 |
125 | End: |
126 | */ |