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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio 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 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio 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 PulseAudio; 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 <unistd.h>
  29 #include <string.h>
  30 #include <errno.h>
  31
  32 #include <pulse/gccmacro.h>
  33 #include <pulsecore/core-util.h>
  34 #include <pulsecore/macro.h>
  35
  36 #include "xmalloc.h"
  37
  38 /* Make sure not to allocate more than this much memory. */
  39 #define MAX_ALLOC_SIZE (1024*1024*96) /* 96MB */
  40
  41 /* #undef malloc */
  42 /* #undef free */
  43 /* #undef realloc */
  44 /* #undef strndup */
  45 /* #undef strdup */
  46
  47 static void oom(void) PA_GCC_NORETURN;
  48
  49 /* called in case of an OOM situation. Prints an error message and
  50  * exits */
  51 static void oom(void) {
  52     static const char e[] = "Not enough memory\n";
  53     pa_loop_write(STDERR_FILENO, e, sizeof(e)-1, NULL);
  54 #ifdef SIGQUIT
  55     raise(SIGQUIT);
  56 #endif
  57     _exit(1);
  58 }
  59
  60 void* pa_xmalloc(size_t size) {
  61     void *p;
  62     pa_assert(size > 0);
  63     pa_assert(size < MAX_ALLOC_SIZE);
  64
  65     if (!(p = malloc(size)))
  66         oom();
  67
  68     return p;
  69 }
  70
  71 void* pa_xmalloc0(size_t size) {
  72     void *p;
  73     pa_assert(size > 0);
  74     pa_assert(size < MAX_ALLOC_SIZE);
  75
  76     if (!(p = calloc(1, size)))
  77         oom();
  78
  79     return p;
  80 }
  81
  82 void *pa_xrealloc(void *ptr, size_t size) {
  83     void *p;
  84     pa_assert(size > 0);
  85     pa_assert(size < MAX_ALLOC_SIZE);
  86
  87     if (!(p = realloc(ptr, size)))
  88         oom();
  89     return p;
  90 }
  91
  92 void* pa_xmemdup(const void *p, size_t l) {
  93     if (!p)
  94         return NULL;
  95     else {
  96         char *r = pa_xmalloc(l);
  97         memcpy(r, p, l);
  98         return r;
  99     }
 100 }
 101
 102 char *pa_xstrdup(const char *s) {
 103     if (!s)
 104         return NULL;
 105
 106     return pa_xmemdup(s, strlen(s)+1);
 107 }
 108
 109 char *pa_xstrndup(const char *s, size_t l) {
 110     char *e, *r;
 111
 112     if (!s)
 113         return NULL;
 114
 115     if ((e = memchr(s, 0, l)))
 116         return pa_xmemdup(s, (size_t) (e-s+1));
 117
 118     r = pa_xmalloc(l+1);
 119     memcpy(r, s, l);
 120     r[l] = 0;
 121     return r;
 122 }
 123
 124 void pa_xfree(void *p) {
 125     int saved_errno;
 126
 127     if (!p)
 128         return;
 129
 130     saved_errno = errno;
 131     free(p);
 132     errno = saved_errno;
 133 }