| 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 | #include <assert.h> |
| 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; |
| 57 | } else { |
| 58 | GC_init(); |
| 59 | assert(GC_all_interior_pointers); |
| 60 | } |
| 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 | */ |