131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
/*-
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)alloc.c 8.1 (Berkeley) 5/31/93";
|
|
#else
|
|
static const char rcsid[] =
|
|
"$Id: alloc.c,v 1.6 1997/02/22 14:01:37 peter Exp $";
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#if __STDC__
|
|
# include <stdarg.h>
|
|
#else
|
|
# include <varargs.h>
|
|
#endif
|
|
|
|
#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(n)
|
|
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(p, n)
|
|
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(s, n)
|
|
size_t s, 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(p)
|
|
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(v, t)
|
|
Char **v;
|
|
struct command *t;
|
|
{
|
|
memtop = (char *) sbrk(0);
|
|
(void) fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n",
|
|
(unsigned long) membot, (unsigned long) memtop,
|
|
(unsigned long) (memtop - membot));
|
|
}
|