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 3 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. If not, see http://www.gnu.org/licenses/. */
21 #include <stdlib.h> /* for malloc, realloc, free */
27 void * (*__gmp_allocate_func) __GMP_PROTO ((size_t)) = __gmp_default_allocate;
28 void * (*__gmp_reallocate_func) __GMP_PROTO ((void *, size_t, size_t))
29 = __gmp_default_reallocate;
30 void (*__gmp_free_func) __GMP_PROTO ((void *, size_t)) = __gmp_default_free;
33 /* Default allocation functions. In case of failure to allocate/reallocate
34 an error message is written to stderr and the program aborts. */
37 __gmp_default_allocate (size_t size)
41 size_t req_size = size;
42 size += 2 * BYTES_PER_MP_LIMB;
47 fprintf (stderr, "GNU MP: Cannot allocate memory (size=%lu)\n", (long) size);
55 p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
56 if (req_size % BYTES_PER_MP_LIMB == 0)
57 p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
65 __gmp_default_reallocate (void *oldptr, size_t old_size, size_t new_size)
70 size_t req_size = new_size;
75 if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
77 fprintf (stderr, "gmp: (realloc) data clobbered before allocation block\n");
80 if (old_size % BYTES_PER_MP_LIMB == 0)
81 if (p[old_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
83 fprintf (stderr, "gmp: (realloc) data clobbered after allocation block\n");
89 new_size += 2 * BYTES_PER_MP_LIMB;
92 ret = realloc (oldptr, new_size);
95 fprintf (stderr, "GNU MP: Cannot reallocate memory (old_size=%lu new_size=%lu)\n", (long) old_size, (long) new_size);
103 p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
104 if (req_size % BYTES_PER_MP_LIMB == 0)
105 p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
113 __gmp_default_free (void *blk_ptr, size_t blk_size)
120 if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
122 fprintf (stderr, "gmp: (free) data clobbered before allocation block\n");
125 if (blk_size % BYTES_PER_MP_LIMB == 0)
126 if (p[blk_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
128 fprintf (stderr, "gmp: (free) data clobbered after allocation block\n");