1 /* $NetBSD: alloc.c,v 1.11 2002/05/25 23:29:16 wiz Exp $ */ 2 3 /*- 4 * Copyright (c) 1983, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)alloc.c 8.1 (Berkeley) 5/31/93"; 40 #else 41 __RCSID("$NetBSD: alloc.c,v 1.11 2002/05/25 23:29:16 wiz Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 47 #include <unistd.h> 48 #include <stdarg.h> 49 #include <stdlib.h> 50 51 #include "csh.h" 52 #include "extern.h" 53 54 char *memtop = NULL; /* PWP: top of current memory */ 55 char *membot = NULL; /* PWP: bottom of allocatable memory */ 56 57 ptr_t 58 Malloc(size_t n) 59 { 60 ptr_t ptr; 61 62 if (membot == NULL) 63 memtop = membot = sbrk(0); 64 if ((ptr = malloc(n)) == (ptr_t) 0) { 65 child++; 66 stderror(ERR_NOMEM); 67 } 68 return (ptr); 69 } 70 71 ptr_t 72 Realloc(ptr_t p, size_t n) 73 { 74 ptr_t ptr; 75 76 if (membot == NULL) 77 memtop = membot = sbrk(0); 78 if ((ptr = realloc(p, n)) == (ptr_t) 0) { 79 child++; 80 stderror(ERR_NOMEM); 81 } 82 return (ptr); 83 } 84 85 ptr_t 86 Calloc(size_t s, size_t n) 87 { 88 ptr_t ptr; 89 90 if (membot == NULL) 91 memtop = membot = sbrk(0); 92 if ((ptr = calloc(s, n)) == (ptr_t) 0) { 93 child++; 94 stderror(ERR_NOMEM); 95 } 96 return (ptr); 97 } 98 99 void 100 Free(ptr_t p) 101 { 102 if (p) 103 free(p); 104 } 105 106 /* 107 * mstats - print out statistics about malloc 108 * 109 * Prints two lines of numbers, one showing the length of the free list 110 * for each size category, the second showing the number of mallocs - 111 * frees for each size category. 112 */ 113 void 114 /*ARGSUSED*/ 115 showall(Char **v, struct command *t) 116 { 117 memtop = (char *)sbrk(0); 118 (void)fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n", 119 (unsigned long)membot, (unsigned long)memtop, 120 (unsigned long)(memtop - membot)); 121 } 122