1 /*- 2 * Copyright (c) 1983, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)alloc.c 8.1 (Berkeley) 5/31/93";*/ 36 static char *rcsid = "$Id: alloc.c,v 1.5 1994/09/21 00:10:24 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/types.h> 40 #include <unistd.h> 41 #include <stdlib.h> 42 #if __STDC__ 43 # include <stdarg.h> 44 #else 45 # include <varargs.h> 46 #endif 47 48 #include "csh.h" 49 #include "extern.h" 50 51 char *memtop = NULL; /* PWP: top of current memory */ 52 char *membot = NULL; /* PWP: bottom of allocatable memory */ 53 54 ptr_t 55 Malloc(n) 56 size_t n; 57 { 58 ptr_t ptr; 59 60 if (membot == NULL) 61 memtop = membot = sbrk(0); 62 if ((ptr = malloc(n)) == (ptr_t) 0) { 63 child++; 64 stderror(ERR_NOMEM); 65 } 66 return (ptr); 67 } 68 69 ptr_t 70 Realloc(p, n) 71 ptr_t p; 72 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(s, n) 87 size_t s, n; 88 { 89 ptr_t ptr; 90 91 if (membot == NULL) 92 memtop = membot = sbrk(0); 93 if ((ptr = calloc(s, n)) == (ptr_t) 0) { 94 child++; 95 stderror(ERR_NOMEM); 96 } 97 98 return (ptr); 99 } 100 101 void 102 Free(p) 103 ptr_t p; 104 { 105 if (p) 106 free(p); 107 } 108 109 /* 110 * mstats - print out statistics about malloc 111 * 112 * Prints two lines of numbers, one showing the length of the free list 113 * for each size category, the second showing the number of mallocs - 114 * frees for each size category. 115 */ 116 void 117 /*ARGSUSED*/ 118 showall(v, t) 119 Char **v; 120 struct command *t; 121 { 122 memtop = (char *) sbrk(0); 123 (void) fprintf(cshout, "Allocated memory from 0x%lx to 0x%lx (%ld).\n", 124 (unsigned long) membot, (unsigned long) memtop, memtop - membot); 125 } 126