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 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 #include "synonyms.h" 34 #include <sys/types.h> 35 #include <sys/times.h> 36 #include <time.h> 37 #include <sys/param.h> /* for HZ (clock frequency in Hz) */ 38 39 #define TIMES(B) (B.tms_utime+B.tms_stime+B.tms_cutime+B.tms_cstime) 40 41 42 clock_t 43 clock(void) 44 { 45 struct tms buffer; 46 static int Hz = 0; 47 static clock_t first; 48 extern int gethz(void); /* XXX should be in a header file! */ 49 50 if (times(&buffer) == (clock_t)-1) 51 return ((clock_t)-1); 52 if (Hz == 0) { 53 if ((Hz = gethz()) == 0) 54 Hz = HZ; 55 first = TIMES(buffer); 56 } 57 58 return ((TIMES(buffer) - first) * (CLOCKS_PER_SEC/Hz)); 59 } 60