1 /* $OpenBSD: times.c,v 1.7 2015/11/02 17:02:37 mmcc Exp $ */ 2 /*- 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/time.h> 32 #include <sys/times.h> 33 #include <sys/resource.h> 34 35 /* 36 * Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000, 37 * but this would overflow if we switch to nanosec. 38 */ 39 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 40 41 clock_t 42 times(struct tms *tp) 43 { 44 struct rusage ru; 45 struct timeval t; 46 47 if (getrusage(RUSAGE_SELF, &ru) < 0) 48 return ((clock_t)-1); 49 tp->tms_utime = CONVTCK(ru.ru_utime); 50 tp->tms_stime = CONVTCK(ru.ru_stime); 51 if (getrusage(RUSAGE_CHILDREN, &ru) < 0) 52 return ((clock_t)-1); 53 tp->tms_cutime = CONVTCK(ru.ru_utime); 54 tp->tms_cstime = CONVTCK(ru.ru_stime); 55 if (gettimeofday(&t, NULL)) 56 return ((clock_t)-1); 57 return ((clock_t)(CONVTCK(t))); 58 } 59