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