1 /* $NetBSD: alloc.c,v 1.7 1997/07/04 21:23:51 christos 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 1.7 1997/07/04 21:23:51 christos Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <unistd.h> 47 #include <stdlib.h> 48 #if __STDC__ 49 # include <stdarg.h> 50 #else 51 # include <varargs.h> 52 #endif 53 54 #include "csh.h" 55 #include "extern.h" 56 57 char *memtop = NULL; /* PWP: top of current memory */ 58 char *membot = NULL; /* PWP: bottom of allocatable memory */ 59 60 ptr_t 61 Malloc(n) 62 size_t n; 63 { 64 ptr_t ptr; 65 66 if (membot == NULL) 67 memtop = membot = sbrk(0); 68 if ((ptr = malloc(n)) == (ptr_t) 0) { 69 child++; 70 stderror(ERR_NOMEM); 71 } 72 return (ptr); 73 } 74 75 ptr_t 76 Realloc(p, n) 77 ptr_t p; 78 size_t n; 79 { 80 ptr_t ptr; 81 82 if (membot == NULL) 83 memtop = membot = sbrk(0); 84 if ((ptr = realloc(p, n)) == (ptr_t) 0) { 85 child++; 86 stderror(ERR_NOMEM); 87 } 88 return (ptr); 89 } 90 91 ptr_t 92 Calloc(s, n) 93 size_t s, n; 94 { 95 ptr_t ptr; 96 97 if (membot == NULL) 98 memtop = membot = sbrk(0); 99 if ((ptr = calloc(s, n)) == (ptr_t) 0) { 100 child++; 101 stderror(ERR_NOMEM); 102 } 103 104 return (ptr); 105 } 106 107 void 108 Free(p) 109 ptr_t p; 110 { 111 if (p) 112 free(p); 113 } 114 115 /* 116 * mstats - print out statistics about malloc 117 * 118 * Prints two lines of numbers, one showing the length of the free list 119 * for each size category, the second showing the number of mallocs - 120 * frees for each size category. 121 */ 122 void 123 /*ARGSUSED*/ 124 showall(v, t) 125 Char **v; 126 struct command *t; 127 { 128 memtop = (char *) sbrk(0); 129 (void) fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n", 130 (unsigned long) membot, (unsigned long) memtop, 131 (unsigned long) (memtop - membot)); 132 } 133