1*db3659e5SSurya Prakki /* 2*db3659e5SSurya Prakki * CDDL HEADER START 3*db3659e5SSurya Prakki * 4*db3659e5SSurya Prakki * The contents of this file are subject to the terms of the 5*db3659e5SSurya Prakki * Common Development and Distribution License (the "License"). 6*db3659e5SSurya Prakki * You may not use this file except in compliance with the License. 7*db3659e5SSurya Prakki * 8*db3659e5SSurya Prakki * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*db3659e5SSurya Prakki * or http://www.opensolaris.org/os/licensing. 10*db3659e5SSurya Prakki * See the License for the specific language governing permissions 11*db3659e5SSurya Prakki * and limitations under the License. 12*db3659e5SSurya Prakki * 13*db3659e5SSurya Prakki * When distributing Covered Code, include this CDDL HEADER in each 14*db3659e5SSurya Prakki * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*db3659e5SSurya Prakki * If applicable, add the following below this CDDL HEADER, with the 16*db3659e5SSurya Prakki * fields enclosed by brackets "[]" replaced with your own identifying 17*db3659e5SSurya Prakki * information: Portions Copyright [yyyy] [name of copyright owner] 18*db3659e5SSurya Prakki * 19*db3659e5SSurya Prakki * CDDL HEADER END 20*db3659e5SSurya Prakki */ 21*db3659e5SSurya Prakki /* 22*db3659e5SSurya Prakki * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23*db3659e5SSurya Prakki * Use is subject to license terms. 24*db3659e5SSurya Prakki */ 25*db3659e5SSurya Prakki 26*db3659e5SSurya Prakki #include <stdio.h> 27*db3659e5SSurya Prakki #include <stdlib.h> 28*db3659e5SSurya Prakki 29*db3659e5SSurya Prakki /* 30*db3659e5SSurya Prakki * realloc() optimization for Small sized caches. 31*db3659e5SSurya Prakki * If a malloc'ed buffer can satisfy a realloc() request 32*db3659e5SSurya Prakki * as well, it should return the same buffer. 33*db3659e5SSurya Prakki * 34*db3659e5SSurya Prakki * cc -O -o reallocs reallocs.c -lmtmalloc 35*db3659e5SSurya Prakki */ 36*db3659e5SSurya Prakki 37*db3659e5SSurya Prakki #define MAX_CACHE_SZ 65536 38*db3659e5SSurya Prakki 39*db3659e5SSurya Prakki int 40*db3659e5SSurya Prakki main() 41*db3659e5SSurya Prakki { 42*db3659e5SSurya Prakki void *p, *q; 43*db3659e5SSurya Prakki size_t size; 44*db3659e5SSurya Prakki 45*db3659e5SSurya Prakki for (size = 1; size <= MAX_CACHE_SZ; size++) { 46*db3659e5SSurya Prakki p = malloc(size); 47*db3659e5SSurya Prakki q = realloc(p, size); 48*db3659e5SSurya Prakki if (p != q) 49*db3659e5SSurya Prakki (void) fprintf(stderr, "size: %d, p: 0x%p, q: 0x%p\n", 50*db3659e5SSurya Prakki size, p, q); 51*db3659e5SSurya Prakki free(q); 52*db3659e5SSurya Prakki } 53*db3659e5SSurya Prakki return (0); 54*db3659e5SSurya Prakki } 55