103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/* Memory management routines.
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Copyright (C) 2002-2017 Free Software Foundation, Inc.
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Contributed by Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include <errno.h>
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#ifndef SIZE_MAX
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#define SIZE_MAX ((size_t)-1)
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#endif
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void *
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xmalloc (size_t n)
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{
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void *p;
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if (n == 0)
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n = 1;
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p = malloc (n);
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if (p == NULL)
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os_error ("Memory allocation failed");
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return p;
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}
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void *
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xmallocarray (size_t nmemb, size_t size)
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{
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void *p;
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if (!nmemb || !size)
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size = nmemb = 1;
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#define HALF_SIZE_T (((size_t) 1) << (__CHAR_BIT__ * sizeof (size_t) / 2))
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else if (__builtin_expect ((nmemb | size) >= HALF_SIZE_T, 0)
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&& nmemb > SIZE_MAX / size)
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{
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errno = ENOMEM;
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os_error ("Integer overflow in xmallocarray");
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}
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p = malloc (nmemb * size);
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if (!p)
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os_error ("Memory allocation failed in xmallocarray");
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return p;
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}
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/* calloc wrapper that aborts on error. */
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void *
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xcalloc (size_t nmemb, size_t size)
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{
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if (!nmemb || !size)
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nmemb = size = 1;
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void *p = calloc (nmemb, size);
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if (!p)
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os_error ("Allocating cleared memory failed");
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return p;
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}
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void *
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xrealloc (void *ptr, size_t size)
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{
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if (size == 0)
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size = 1;
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void *newp = realloc (ptr, size);
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if (!newp)
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os_error ("Memory allocation failure in xrealloc");
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return newp;
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}
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