1 /* $OpenBSD: alloc.c,v 1.3 1996/12/14 12:17:40 mickey Exp $ */ 2 /* $NetBSD: alloc.c,v 1.6 1995/03/21 09:02:23 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1983, 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)alloc.c 8.1 (Berkeley) 5/31/93"; 40 #else 41 static char rcsid[] = "$OpenBSD: alloc.c,v 1.3 1996/12/14 12:17:40 mickey 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 (%d).\n", 130 (unsigned long) membot, (unsigned long) memtop, memtop - membot); 131 } 132