| /* 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) __GMP_PROTO ((size_t)) = __gmp_default_allocate; |
| void * (*__gmp_reallocate_func) __GMP_PROTO ((void *, size_t, size_t)) |
| = __gmp_default_reallocate; |
| void (*__gmp_free_func) __GMP_PROTO ((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); |
| } |