/* 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 2.1 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; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <stdio.h> #include <stdlib.h> /* for malloc, realloc, free */ #include "mpir.h" #include "gmp-impl.h" void * (*__gmp_allocate_func) _PROTO ((size_t)) = __gmp_default_allocate; void * (*__gmp_reallocate_func) _PROTO ((void *, size_t, size_t)) = __gmp_default_reallocate; void (*__gmp_free_func) _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=%u)\n", 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=%u new_size=%u)\n", old_size, 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); }