code.delx.au - pulseaudio/blob - src/polyp/xmalloc.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <signal.h>
  28 #include <assert.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31
  32 #include <polypcore/core-util.h>
  33 #include <polypcore/gccmacro.h>
  34
  35 #include "xmalloc.h"
  36
  37 /* Make sure not to allocate more than this much memory. */
  38 #define MAX_ALLOC_SIZE (1024*1024*20) /* 20MB */
  39
  40 /* #undef malloc */
  41 /* #undef free */
  42 /* #undef realloc */
  43 /* #undef strndup */
  44 /* #undef strdup */
  45
  46 static void oom(void) PA_GCC_NORETURN;
  47
  48 /** called in case of an OOM situation. Prints an error message and
  49  * exits */
  50 static void oom(void) {
  51     static const char e[] = "Not enough memory\n";
  52     pa_loop_write(STDERR_FILENO, e, sizeof(e)-1);
  53 #ifdef SIGQUIT
  54     raise(SIGQUIT);
  55 #endif
  56     _exit(1);
  57 }
  58
  59 void* pa_xmalloc(size_t size) {
  60     void *p;
  61     assert(size > 0);
  62     assert(size < MAX_ALLOC_SIZE);
  63
  64     if (!(p = malloc(size)))
  65         oom();
  66
  67     return p;
  68 }
  69
  70 void* pa_xmalloc0(size_t size) {
  71     void *p;
  72     assert(size > 0);
  73     assert(size < MAX_ALLOC_SIZE);
  74
  75     if (!(p = calloc(1, size)))
  76         oom();
  77
  78     return p;
  79 }
  80
  81 void *pa_xrealloc(void *ptr, size_t size) {
  82     void *p;
  83     assert(size > 0);
  84     assert(size < MAX_ALLOC_SIZE);
  85
  86     if (!(p = realloc(ptr, size)))
  87         oom();
  88     return p;
  89 }
  90
  91 void* pa_xmemdup(const void *p, size_t l) {
  92     if (!p)
  93         return NULL;
  94     else {
  95         char *r = pa_xmalloc(l);
  96         memcpy(r, p, l);
  97         return r;
  98     }
  99 }
 100
 101 char *pa_xstrdup(const char *s) {
 102     if (!s)
 103         return NULL;
 104
 105     return pa_xmemdup(s, strlen(s)+1);
 106 }
 107
 108 char *pa_xstrndup(const char *s, size_t l) {
 109     char *e, *r;
 110
 111     if (!s)
 112         return NULL;
 113
 114     if ((e = memchr(s, 0, l)))
 115         return pa_xmemdup(s, e-s+1);
 116
 117     r = pa_xmalloc(l+1);
 118     memcpy(r, s, l);
 119     r[l] = 0;
 120     return r;
 121 }
 122
 123 void pa_xfree(void *p) {
 124     if (!p)
 125         return;
 126
 127     free(p);
 128 }