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/* $OpenBSD: alloc.c,v 1.10 2009/10/27 23:59:21 deraadt Exp $ */
/* $NetBSD: alloc.c,v 1.6 1995/03/21 09:02:23 cgd Exp $ */
/*-
* Copyright (c) 1983, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include "csh.h"
#include "extern.h"
char *memtop = NULL; /* PWP: top of current memory */
char *membot = NULL; /* PWP: bottom of allocatable memory */
ptr_t
Malloc(size_t n)
{
ptr_t ptr;
if (membot == NULL)
memtop = membot = sbrk(0);
if ((ptr = malloc(n)) == (ptr_t) 0) {
child++;
stderror(ERR_NOMEM);
}
return (ptr);
}
ptr_t
Realloc(ptr_t p, size_t n)
{
ptr_t ptr;
if (membot == NULL)
memtop = membot = sbrk(0);
if ((ptr = realloc(p, n)) == (ptr_t) 0) {
child++;
stderror(ERR_NOMEM);
}
return (ptr);
}
ptr_t
Calloc(size_t s, size_t n)
{
ptr_t ptr;
if (membot == NULL)
memtop = membot = sbrk(0);
if ((ptr = calloc(s, n)) == (ptr_t) 0) {
child++;
stderror(ERR_NOMEM);
}
return (ptr);
}
void
Free(ptr_t p)
{
if (p)
free(p);
}
/*
* mstats - print out statistics about malloc
*
* Prints two lines of numbers, one showing the length of the free list
* for each size category, the second showing the number of mallocs -
* frees for each size category.
*/
void
/*ARGSUSED*/
showall(Char **v, struct command *t)
{
memtop = (char *) sbrk(0);
(void) fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%d).\n",
(unsigned long) membot, (unsigned long) memtop, (int)(memtop - membot));
}
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