1 /* 2 * memory wrappers 3 * 4 * Copyright (c) Artem Bityutskiy, 2007, 2008 5 * Copyright 2001, 2002 Red Hat, Inc. 6 * 2001 David A. Schleef <ds (at) lineo.com> 7 * 2002 Axis Communications AB 8 * 2001, 2002 Erik Andersen <andersen (at) codepoet.org> 9 * 2004 University of Szeged, Hungary 10 * 2006 KaiGai Kohei <kaigai (at) ak.jp.nec.com> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 20 * the GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #ifndef __MTD_UTILS_XALLOC_H__ 28 #define __MTD_UTILS_XALLOC_H__ 29 30 #include <stdarg.h> 31 #include <stdlib.h> 32 #include <string.h> 33 34 /* 35 * Mark these functions as unused so that gcc does not emit warnings 36 * when people include this header but don't use every function. 37 */ 38 39 __attribute__((unused)) 40 static void *xmalloc(size_t size) 41 { 42 void *ptr = malloc(size); 43 44 if (ptr == NULL && size != 0) 45 sys_errmsg_die("out of memory"); 46 return ptr; 47 } 48 49 __attribute__((unused)) 50 static void *xcalloc(size_t nmemb, size_t size) 51 { 52 void *ptr = calloc(nmemb, size); 53 54 if (ptr == NULL && nmemb != 0 && size != 0) 55 sys_errmsg_die("out of memory"); 56 return ptr; 57 } 58 59 __attribute__((unused)) 60 static void *xzalloc(size_t size) 61 { 62 return xcalloc(1, size); 63 } 64 65 __attribute__((unused)) 66 static void *xrealloc(void *ptr, size_t size) 67 { 68 ptr = realloc(ptr, size); 69 if (ptr == NULL && size != 0) 70 sys_errmsg_die("out of memory"); 71 return ptr; 72 } 73 74 __attribute__((unused)) 75 static char *xstrdup(const char *s) 76 { 77 char *t; 78 79 if (s == NULL) 80 return NULL; 81 t = strdup(s); 82 if (t == NULL) 83 sys_errmsg_die("out of memory"); 84 return t; 85 } 86 87 #ifdef _GNU_SOURCE 88 89 __attribute__((unused)) 90 static int xasprintf(char **strp, const char *fmt, ...) 91 { 92 int cnt; 93 va_list ap; 94 95 va_start(ap, fmt); 96 cnt = vasprintf(strp, fmt, ap); 97 va_end(ap); 98 99 if (cnt == -1) 100 sys_errmsg_die("out of memory"); 101 102 return cnt; 103 } 104 #endif 105 106 #endif /* !__MTD_UTILS_XALLOC_H__ */ 107
