1 /* $NetBSD: alloc.c,v 1.6 1995/03/21 09:02:23 cgd 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 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)alloc.c 8.1 (Berkeley) 5/31/93"; 39 #else 40 static char rcsid[] = "$NetBSD: alloc.c,v 1.6 1995/03/21 09:02:23 cgd Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <unistd.h> 46 #include <stdlib.h> 47 #if __STDC__ 48 # include <stdarg.h> 49 #else 50 # include <varargs.h> 51 #endif 52 53 #include "csh.h" 54 #include "extern.h" 55 56 char *memtop = NULL; /* PWP: top of current memory */ 57 char *membot = NULL; /* PWP: bottom of allocatable memory */ 58 59 ptr_t 60 Malloc(n) 61 size_t n; 62 { 63 ptr_t ptr; 64 65 if (membot == NULL) 66 memtop = membot = sbrk(0); 67 if ((ptr = malloc(n)) == (ptr_t) 0) { 68 child++; 69 stderror(ERR_NOMEM); 70 } 71 return (ptr); 72 } 73 74 ptr_t 75 Realloc(p, n) 76 ptr_t p; 77 size_t n; 78 { 79 ptr_t ptr; 80 81 if (membot == NULL) 82 memtop = membot = sbrk(0); 83 if ((ptr = realloc(p, n)) == (ptr_t) 0) { 84 child++; 85 stderror(ERR_NOMEM); 86 } 87 return (ptr); 88 } 89 90 ptr_t 91 Calloc(s, n) 92 size_t s, n; 93 { 94 ptr_t ptr; 95 96 if (membot == NULL) 97 memtop = membot = sbrk(0); 98 if ((ptr = calloc(s, n)) == (ptr_t) 0) { 99 child++; 100 stderror(ERR_NOMEM); 101 } 102 103 return (ptr); 104 } 105 106 void 107 Free(p) 108 ptr_t p; 109 { 110 if (p) 111 free(p); 112 } 113 114 /* 115 * mstats - print out statistics about malloc 116 * 117 * Prints two lines of numbers, one showing the length of the free list 118 * for each size category, the second showing the number of mallocs - 119 * frees for each size category. 120 */ 121 void 122 /*ARGSUSED*/ 123 showall(v, t) 124 Char **v; 125 struct command *t; 126 { 127 memtop = (char *) sbrk(0); 128 (void) fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n", 129 (unsigned long) membot, (unsigned long) memtop, memtop - membot); 130 } 131