118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/* $NetBSD: alloc.c,v 1.12 2003/08/07 09:05:03 agc Exp $ */
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/*-
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* Copyright (c) 1983, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)alloc.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: alloc.c,v 1.12 2003/08/07 09:05:03 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include "csh.h"
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#include "extern.h"
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char *memtop = NULL; /* PWP: top of current memory */
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char *membot = NULL; /* PWP: bottom of allocatable memory */
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ptr_t
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Malloc(size_t n)
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{
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ptr_t ptr;
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if (membot == NULL)
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memtop = membot = sbrk(0);
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if ((ptr = malloc(n)) == (ptr_t) 0) {
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child++;
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stderror(ERR_NOMEM);
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}
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return (ptr);
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}
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ptr_t
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Realloc(ptr_t p, size_t n)
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{
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ptr_t ptr;
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if (membot == NULL)
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memtop = membot = sbrk(0);
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if ((ptr = realloc(p, n)) == (ptr_t) 0) {
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child++;
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stderror(ERR_NOMEM);
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}
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return (ptr);
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}
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ptr_t
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Calloc(size_t s, size_t n)
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{
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ptr_t ptr;
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if (membot == NULL)
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memtop = membot = sbrk(0);
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if ((ptr = calloc(s, n)) == (ptr_t) 0) {
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child++;
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stderror(ERR_NOMEM);
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}
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return (ptr);
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}
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void
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Free(ptr_t p)
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{
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if (p)
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free(p);
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}
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/*
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* mstats - print out statistics about malloc
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*
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* Prints two lines of numbers, one showing the length of the free list
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* for each size category, the second showing the number of mallocs -
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* frees for each size category.
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*/
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void
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/*ARGSUSED*/
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showall(Char **v, struct command *t)
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{
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memtop = (char *)sbrk(0);
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(void)fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n",
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(unsigned long)membot, (unsigned long)memtop,
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(unsigned long)(memtop - membot));
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}
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