147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/* Memory allocation routines.
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Copyright 1991, 1993, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h> /* for malloc, realloc, free */
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#include "mpir.h"
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#include "gmp-impl.h"
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void * (*__gmp_allocate_func) _PROTO ((size_t)) = __gmp_default_allocate;
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void * (*__gmp_reallocate_func) _PROTO ((void *, size_t, size_t))
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= __gmp_default_reallocate;
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void (*__gmp_free_func) _PROTO ((void *, size_t)) = __gmp_default_free;
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/* Default allocation functions. In case of failure to allocate/reallocate
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an error message is written to stderr and the program aborts. */
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void *
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__gmp_default_allocate (size_t size)
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{
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void *ret;
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#ifdef DEBUG
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size_t req_size = size;
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size += 2 * BYTES_PER_MP_LIMB;
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#endif
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ret = malloc (size);
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if (ret == 0)
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{
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#if defined _MSC_VER && defined _WIN64
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fprintf (stderr, "GNU MP: Cannot allocate memory (size=%llu)\n", size);
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#else
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fprintf (stderr, "GNU MP: Cannot allocate memory (size=%lu)\n", size);
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#endif
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abort ();
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}
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#ifdef DEBUG
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{
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mp_ptr p = ret;
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p++;
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p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
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if (req_size % BYTES_PER_MP_LIMB == 0)
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p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
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ret = p;
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}
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#endif
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return ret;
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}
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void *
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__gmp_default_reallocate (void *oldptr, size_t old_size, size_t new_size)
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{
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void *ret;
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#ifdef DEBUG
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size_t req_size = new_size;
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if (old_size != 0)
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{
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mp_ptr p = oldptr;
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if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
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{
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fprintf (stderr, "gmp: (realloc) data clobbered before allocation block\n");
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abort ();
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}
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if (old_size % BYTES_PER_MP_LIMB == 0)
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if (p[old_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
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{
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fprintf (stderr, "gmp: (realloc) data clobbered after allocation block\n");
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abort ();
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}
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oldptr = p - 1;
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}
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new_size += 2 * BYTES_PER_MP_LIMB;
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#endif
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ret = realloc (oldptr, new_size);
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if (ret == 0)
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{
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#if defined _MSC_VER && defined _WIN64
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fprintf (stderr, "GNU MP: Cannot reallocate memory (old_size=%llu new_size=%llu)\n", old_size, new_size);
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#else
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fprintf (stderr, "GNU MP: Cannot reallocate memory (old_size=%lu new_size=%lu)\n", old_size, new_size);
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#endif
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abort ();
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}
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#ifdef DEBUG
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{
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mp_ptr p = ret;
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p++;
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p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
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if (req_size % BYTES_PER_MP_LIMB == 0)
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p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
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ret = p;
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}
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#endif
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return ret;
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}
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void
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__gmp_default_free (void *blk_ptr, size_t blk_size)
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{
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#ifdef DEBUG
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{
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mp_ptr p = blk_ptr;
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if (blk_size != 0)
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{
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if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
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{
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fprintf (stderr, "gmp: (free) data clobbered before allocation block\n");
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abort ();
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}
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if (blk_size % BYTES_PER_MP_LIMB == 0)
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if (p[blk_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
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{
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fprintf (stderr, "gmp: (free) data clobbered after allocation block\n");
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abort ();
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}
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}
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blk_ptr = p - 1;
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}
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#endif
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free (blk_ptr);
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}
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