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/* Memory management routines.
Copyright (C) 2002-2017 Free Software Foundation, Inc.
Contributed by Paul Brook <paul@nowt.org>
This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran 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; either
version 3 of the License, or (at your option) any later version.
Libgfortran 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <errno.h>
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
void *
xmalloc (size_t n)
{
void *p;
if (n == 0)
n = 1;
p = malloc (n);
if (p == NULL)
os_error ("Memory allocation failed");
return p;
}
void *
xmallocarray (size_t nmemb, size_t size)
{
void *p;
if (!nmemb || !size)
size = nmemb = 1;
#define HALF_SIZE_T (((size_t) 1) << (__CHAR_BIT__ * sizeof (size_t) / 2))
else if (__builtin_expect ((nmemb | size) >= HALF_SIZE_T, 0)
&& nmemb > SIZE_MAX / size)
{
errno = ENOMEM;
os_error ("Integer overflow in xmallocarray");
}
p = malloc (nmemb * size);
if (!p)
os_error ("Memory allocation failed in xmallocarray");
return p;
}
/* calloc wrapper that aborts on error. */
void *
xcalloc (size_t nmemb, size_t size)
{
if (!nmemb || !size)
nmemb = size = 1;
void *p = calloc (nmemb, size);
if (!p)
os_error ("Allocating cleared memory failed");
return p;
}
void *
xrealloc (void *ptr, size_t size)
{
if (size == 0)
size = 1;
void *newp = realloc (ptr, size);
if (!newp)
os_error ("Memory allocation failure in xrealloc");
return newp;
}
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