1 /* Memory allocation routines.
3 Copyright (C) 1991, 1993, 1994, 2000 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
7 The GNU MP Library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or (at your
10 option) any later version.
12 The GNU MP Library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with the GNU MP Library; see the file COPYING.LIB. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20 MA 02111-1307, USA. */
23 #include <stdlib.h> /* for malloc, realloc, free */
33 void * (*_mp_allocate_func) _PROTO ((size_t)) = _mp_default_allocate;
34 void * (*_mp_reallocate_func) _PROTO ((void *, size_t, size_t))
35 = _mp_default_reallocate;
36 void (*_mp_free_func) _PROTO ((void *, size_t)) = _mp_default_free;
39 /* Default allocation functions. In case of failure to allocate/reallocate
40 an error message is written to stderr and the program aborts. */
44 _mp_default_allocate (size_t size)
46 _mp_default_allocate (size)
52 size_t req_size = size;
53 size += 2 * BYTES_PER_MP_LIMB;
58 perror ("cannot allocate in gmp");
66 p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
67 if (req_size % BYTES_PER_MP_LIMB == 0)
68 p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
77 _mp_default_reallocate (void *oldptr, size_t old_size, size_t new_size)
79 _mp_default_reallocate (oldptr, old_size, new_size)
88 size_t req_size = new_size;
93 if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
95 fprintf (stderr, "gmp: (realloc) data clobbered before allocation block\n");
98 if (old_size % BYTES_PER_MP_LIMB == 0)
99 if (p[old_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
101 fprintf (stderr, "gmp: (realloc) data clobbered after allocation block\n");
107 new_size += 2 * BYTES_PER_MP_LIMB;
110 ret = realloc (oldptr, new_size);
113 perror ("cannot allocate in gmp");
121 p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
122 if (req_size % BYTES_PER_MP_LIMB == 0)
123 p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
132 _mp_default_free (void *blk_ptr, size_t blk_size)
134 _mp_default_free (blk_ptr, blk_size)
144 if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
146 fprintf (stderr, "gmp: (free) data clobbered before allocation block\n");
149 if (blk_size % BYTES_PER_MP_LIMB == 0)
150 if (p[blk_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
152 fprintf (stderr, "gmp: (free) data clobbered after allocation block\n");