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/* $Id$ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pj/assert.h>
#include <pj/string.h>
#if PJ_SAFE_POOL
# define SIG_SIZE sizeof(pj_uint32_t)
static void apply_signature(void *p, pj_size_t size);
static void check_pool_signature(void *p, pj_size_t size);
# define APPLY_SIG(p,sz) apply_signature(p,sz), \
p=(void*)(((char*)p)+SIG_SIZE)
# define REMOVE_SIG(p,sz) check_pool_signature(p,sz), \
p=(void*)(((char*)p)-SIG_SIZE)
# define SIG_BEGIN 0x600DC0DE
# define SIG_END 0x0BADC0DE
static void apply_signature(void *p, pj_size_t size)
{
pj_uint32_t sig;
sig = SIG_BEGIN;
pj_memcpy(p, &sig, SIG_SIZE);
sig = SIG_END;
pj_memcpy(((char*)p)+SIG_SIZE+size, &sig, SIG_SIZE);
}
static void check_pool_signature(void *p, pj_size_t size)
{
pj_uint32_t sig;
pj_uint8_t *mem = (pj_uint8_t*)p;
/* Check that signature at the start of the block is still intact */
sig = SIG_BEGIN;
pj_assert(!pj_memcmp(mem-SIG_SIZE, &sig, SIG_SIZE));
/* Check that signature at the end of the block is still intact.
* Note that "mem" has been incremented by SIG_SIZE
*/
sig = SIG_END;
pj_assert(!pj_memcmp(mem+size, &sig, SIG_SIZE));
}
#else
# define SIG_SIZE 0
# define APPLY_SIG(p,sz)
# define REMOVE_SIG(p,sz)
#endif
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