mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-12 11:29:30 +00:00
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/* Memory management routines.
|
|
Copyright (C) 2002-2018 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;
|
|
}
|