1 /* Memory allocation routines.
3 Copyright 1991, 1993, 1994, 2000, 2001, 2002 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., 51 Franklin Street, Fifth Floor, Boston,
20 MA 02110-1301, USA. */
23 #include <stdlib.h> /* for malloc, realloc, free */
29 void * (*__gmp_allocate_func) _PROTO ((size_t)) = __gmp_default_allocate;
30 void * (*__gmp_reallocate_func) _PROTO ((void *, size_t, size_t))
31 = __gmp_default_reallocate;
32 void (*__gmp_free_func) _PROTO ((void *, size_t)) = __gmp_default_free;
35 /* Default allocation functions. In case of failure to allocate/reallocate
36 an error message is written to stderr and the program aborts. */
39 __gmp_default_allocate (size_t size)
43 size_t req_size = size;
44 size += 2 * BYTES_PER_MP_LIMB;
49 fprintf (stderr, "GNU MP: Cannot allocate memory (size=%u)\n", size);
57 p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
58 if (req_size % BYTES_PER_MP_LIMB == 0)
59 p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
67 __gmp_default_reallocate (void *oldptr, size_t old_size, size_t new_size)
72 size_t req_size = new_size;
77 if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
79 fprintf (stderr, "gmp: (realloc) data clobbered before allocation block\n");
82 if (old_size % BYTES_PER_MP_LIMB == 0)
83 if (p[old_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
85 fprintf (stderr, "gmp: (realloc) data clobbered after allocation block\n");
91 new_size += 2 * BYTES_PER_MP_LIMB;
94 ret = realloc (oldptr, new_size);
97 fprintf (stderr, "GNU MP: Cannot reallocate memory (old_size=%u new_size=%u)\n", old_size, new_size);
105 p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
106 if (req_size % BYTES_PER_MP_LIMB == 0)
107 p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
115 __gmp_default_free (void *blk_ptr, size_t blk_size)
122 if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
124 fprintf (stderr, "gmp: (free) data clobbered before allocation block\n");
127 if (blk_size % BYTES_PER_MP_LIMB == 0)
128 if (p[blk_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
130 fprintf (stderr, "gmp: (free) data clobbered after allocation block\n");