mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 08:11:08 +00:00
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/* xmalloc.c -- malloc with out of memory checking
|
|
Copyright (C) 1990-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published
|
|
by the Free Software Foundation; version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#define VOID void
|
|
|
|
#include <sys/types.h>
|
|
|
|
#if STDC_HEADERS || _LIBC
|
|
#include <stdlib.h>
|
|
static VOID *fixup_null_alloc (size_t n) __THROW;
|
|
VOID *xmalloc (size_t n) __THROW;
|
|
VOID *xcalloc (size_t n, size_t s) __THROW;
|
|
VOID *xrealloc (VOID *p, size_t n) __THROW;
|
|
#else
|
|
VOID *calloc ();
|
|
VOID *malloc ();
|
|
VOID *realloc ();
|
|
void free ();
|
|
#endif
|
|
|
|
#include <libintl.h>
|
|
#include "error.h"
|
|
|
|
#ifndef _
|
|
# define _(str) gettext (str)
|
|
#endif
|
|
|
|
#ifndef EXIT_FAILURE
|
|
#define EXIT_FAILURE 4
|
|
#endif
|
|
|
|
/* Exit value when the requested amount of memory is not available.
|
|
The caller may set it to some other value. */
|
|
int xmalloc_exit_failure = EXIT_FAILURE;
|
|
|
|
static VOID *
|
|
fixup_null_alloc (size_t n)
|
|
{
|
|
VOID *p;
|
|
|
|
p = 0;
|
|
if (n == 0)
|
|
p = malloc ((size_t) 1);
|
|
if (p == 0)
|
|
error (xmalloc_exit_failure, 0, _("memory exhausted"));
|
|
return p;
|
|
}
|
|
|
|
/* Allocate N bytes of memory dynamically, with error checking. */
|
|
|
|
VOID *
|
|
xmalloc (size_t n)
|
|
{
|
|
VOID *p;
|
|
|
|
p = malloc (n);
|
|
if (p == 0)
|
|
p = fixup_null_alloc (n);
|
|
return p;
|
|
}
|
|
|
|
/* Allocate memory for N elements of S bytes, with error checking. */
|
|
|
|
VOID *
|
|
xcalloc (size_t n, size_t s)
|
|
{
|
|
VOID *p;
|
|
|
|
p = calloc (n, s);
|
|
if (p == 0)
|
|
p = fixup_null_alloc (n);
|
|
return p;
|
|
}
|
|
|
|
/* Change the size of an allocated block of memory P to N bytes,
|
|
with error checking.
|
|
If P is NULL, run xmalloc. */
|
|
|
|
VOID *
|
|
xrealloc (VOID *p, size_t n)
|
|
{
|
|
if (p == 0)
|
|
return xmalloc (n);
|
|
p = realloc (p, n);
|
|
if (p == 0)
|
|
p = fixup_null_alloc (n);
|
|
return p;
|
|
}
|