code.delx.au - pulseaudio/blob - 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
  31 #include "memory.h"
  32 #include "util.h"
  33 #include "xmalloc.h"
  34 #include "gccmacro.h"
  35
  36 /* Make sure not to allocate more than this much memory. */
  37 #define MAX_ALLOC_SIZE (1024*1024*20) /* 20MB */
  38
  39 /* #undef malloc */
  40 /* #undef free */
  41 /* #undef realloc */
  42 /* #undef strndup */
  43 /* #undef strdup */
  44
  45 static void oom(void) PA_GCC_NORETURN;
  46
  47 /** called in case of an OOM situation. Prints an error message and
  48  * exits */
  49 static void oom(void) {
  50     static const char e[] = "Not enough memory\n";
  51     pa_loop_write(STDERR_FILENO, e, sizeof(e)-1);
  52 #ifdef SIGQUIT
  53     raise(SIGQUIT);
  54 #endif
  55     _exit(1);
  56 }
  57
  58 void* pa_xmalloc(size_t size) {
  59     void *p;
  60     assert(size > 0);
  61     assert(size < MAX_ALLOC_SIZE);
  62
  63     if (!(p = malloc(size)))
  64         oom();
  65
  66     return p;
  67 }
  68
  69 void* pa_xmalloc0(size_t size) {
  70     void *p;
  71     assert(size > 0);
  72     assert(size < MAX_ALLOC_SIZE);
  73
  74     if (!(p = calloc(1, size)))
  75         oom();
  76
  77     return p;
  78 }
  79
  80 void *pa_xrealloc(void *ptr, size_t size) {
  81     void *p;
  82     assert(size > 0);
  83     assert(size < MAX_ALLOC_SIZE);
  84
  85     if (!(p = realloc(ptr, size)))
  86         oom();
  87     return p;
  88 }
  89
  90 void* pa_xmemdup(const void *p, size_t l) {
  91     if (!p)
  92         return NULL;
  93     else {
  94         char *r = pa_xmalloc(l);
  95         memcpy(r, p, l);
  96         return r;
  97     }
  98 }
  99
 100 char *pa_xstrdup(const char *s) {
 101     if (!s)
 102         return NULL;
 103
 104     return pa_xmemdup(s, strlen(s)+1);
 105 }
 106
 107 char *pa_xstrndup(const char *s, size_t l) {
 108     if (!s)
 109         return NULL;
 110     else {
 111         char *r;
 112         size_t t = strlen(s);
 113
 114         if (t > l)
 115             t = l;
 116
 117         r = pa_xmemdup(s, t+1);
 118         r[t] = 0;
 119         return r;
 120     }
 121 }
 122