1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * This D script is used as an example in the Solaris Dynamic Tracing Guide 27 * wiki in the "Variables" Chapter. 28 * 29 * The full text of the this chapter may be found here: 30 * 31 * http://wikis.sun.com/display/DTrace/Variables 32 * 33 * On machines that have DTrace installed, this script is available as 34 * clause.d in /usr/demo/dtrace, a directory that contains all D scripts 35 * used in the Solaris Dynamic Tracing Guide. A table of the scripts and their 36 * corresponding chapters may be found here: 37 * 38 * file:///usr/demo/dtrace/index.html 39 */ 40 41 int me; /* an integer global variable */ 42 this int foo; /* an integer clause-local variable */ 43 44 tick-1sec 45 { 46 /* 47 * Set foo to be 10 if and only if this is the first clause executed. 48 */ 49 this->foo = (me % 3 == 0) ? 10 : this->foo; 50 printf("Clause 1 is number %d; foo is %d\n", me++ % 3, this->foo++); 51 } 52 53 tick-1sec 54 { 55 /* 56 * Set foo to be 20 if and only if this is the first clause executed. 57 */ 58 this->foo = (me % 3 == 0) ? 20 : this->foo; 59 printf("Clause 2 is number %d; foo is %d\n", me++ % 3, this->foo++); 60 } 61 62 tick-1sec 63 { 64 /* 65 * Set foo to be 30 if and only if this is the first clause executed. 66 */ 67 this->foo = (me % 3 == 0) ? 30 : this->foo; 68 printf("Clause 3 is number %d; foo is %d\n", me++ % 3, this->foo++); 69 } 70