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/* Memory allocation routines.
Copyright 1991, 1993, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MP Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h> /* for malloc, realloc, free */
#include "gmp.h"
#include "gmp-impl.h"
void * (*__gmp_allocate_func) (size_t) = __gmp_default_allocate;
void * (*__gmp_reallocate_func) (void *, size_t, size_t) = __gmp_default_reallocate;
void (*__gmp_free_func) (void *, size_t) = __gmp_default_free;
/* Default allocation functions. In case of failure to allocate/reallocate
an error message is written to stderr and the program aborts. */
void *
__gmp_default_allocate (size_t size)
{
void *ret;
#ifdef DEBUG
size_t req_size = size;
size += 2 * BYTES_PER_MP_LIMB;
#endif
ret = malloc (size);
if (ret == 0)
{
fprintf (stderr, "GNU MP: Cannot allocate memory (size=%lu)\n", (long) size);
abort ();
}
#ifdef DEBUG
{
mp_ptr p = ret;
p++;
p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
if (req_size % BYTES_PER_MP_LIMB == 0)
p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
ret = p;
}
#endif
return ret;
}
void *
__gmp_default_reallocate (void *oldptr, size_t old_size, size_t new_size)
{
void *ret;
#ifdef DEBUG
size_t req_size = new_size;
if (old_size != 0)
{
mp_ptr p = oldptr;
if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
{
fprintf (stderr, "gmp: (realloc) data clobbered before allocation block\n");
abort ();
}
if (old_size % BYTES_PER_MP_LIMB == 0)
if (p[old_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
{
fprintf (stderr, "gmp: (realloc) data clobbered after allocation block\n");
abort ();
}
oldptr = p - 1;
}
new_size += 2 * BYTES_PER_MP_LIMB;
#endif
ret = realloc (oldptr, new_size);
if (ret == 0)
{
fprintf (stderr, "GNU MP: Cannot reallocate memory (old_size=%lu new_size=%lu)\n", (long) old_size, (long) new_size);
abort ();
}
#ifdef DEBUG
{
mp_ptr p = ret;
p++;
p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
if (req_size % BYTES_PER_MP_LIMB == 0)
p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
ret = p;
}
#endif
return ret;
}
void
__gmp_default_free (void *blk_ptr, size_t blk_size)
{
#ifdef DEBUG
{
mp_ptr p = blk_ptr;
if (blk_size != 0)
{
if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
{
fprintf (stderr, "gmp: (free) data clobbered before allocation block\n");
abort ();
}
if (blk_size % BYTES_PER_MP_LIMB == 0)
if (p[blk_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
{
fprintf (stderr, "gmp: (free) data clobbered after allocation block\n");
abort ();
}
}
blk_ptr = p - 1;
}
#endif
free (blk_ptr);
}
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