/* $OpenBSD: alloc.c,v 1.4 1997/07/25 18:57:57 mickey 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. 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 char rcsid[] = "$OpenBSD: alloc.c,v 1.4 1997/07/25 18:57:57 mickey Exp $"; #endif #endif /* not lint */ #include <sys/types.h> #include <unistd.h> #include <stdlib.h> #ifdef __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 (%d).\n", (unsigned long) membot, (unsigned long) memtop, memtop - membot); }