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/***************************************
$Header: /cvs/src/jbofihe/memory.c,v 1.2 2000/04/29 23:14:58 richard Exp $
malloc/free wrappers to allow auditing.
***************************************/
/**********************************************************************
* Copyright (C) Richard P. Curnow 1998-2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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 <stdio.h>
#include <stdlib.h>
#include "functions.h"
static unsigned long bytes_in_use = 0;
static unsigned long max_bytes_in_use = 0;
/*++++++++++++++++++++++++++++++
Replacement for malloc()
++++++++++++++++++++++++++++++*/
void *Malloc(size_t n)
{
char *s, *r;
unsigned long *x;
size_t nn;
bytes_in_use += n;
if (bytes_in_use > max_bytes_in_use) {
max_bytes_in_use = bytes_in_use;
}
nn = n + 8;
s = (char *) malloc(nn);
x = (unsigned long *) s;
*x = n;
r = (void *) (s + 8);
return r;
}
/*++++++++++++++++++++++++++++++
Replacement for malloc()
++++++++++++++++++++++++++++++*/
void *Realloc(void *old, size_t n)
{
char *s, *r;
unsigned long *x;
size_t nn;
s = (char *)old - 8;
x = (unsigned long *) s;
bytes_in_use -= *x;
bytes_in_use += n;
if (bytes_in_use > max_bytes_in_use) {
max_bytes_in_use = bytes_in_use;
}
nn = n + 8;
s = (char *) realloc(s, nn);
x = (unsigned long *) s;
*x = n;
r = (void *) (s + 8);
return r;
}
/*++++++++++++++++++++++++++++++
Replacement for free()
++++++++++++++++++++++++++++++*/
void Free(void *x)
{
char *r, *s;
unsigned long *v;
size_t nn;
r = (char *) x;
s = (void *) (r - 8);
v = (unsigned long *) s;
nn = *v;
bytes_in_use -= nn;
free(s);
}
/*++++++++++++++++++++++++++++++
Print amount of memory used
++++++++++++++++++++++++++++++*/
void
print_memory_statistics(void)
{
fprintf(stderr,
"Bytes in use at end : %8lu\n"
"Maximum bytes in use : %8lu\n",
bytes_in_use, max_bytes_in_use);
}
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