1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __SCCSID("@(#)times.c 8.1 (Berkeley) 6/4/93"); 34 #include <sys/param.h> 35 #include <sys/time.h> 36 #include <sys/times.h> 37 #include <sys/resource.h> 38 39 /* 40 * Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000, 41 * but this would overflow if we switch to nanosec. 42 */ 43 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 44 45 clock_t 46 times(struct tms *tp) 47 { 48 struct rusage ru; 49 struct timespec t; 50 clock_t c; 51 52 if (getrusage(RUSAGE_SELF, &ru) < 0) 53 return ((clock_t)-1); 54 tp->tms_utime = CONVTCK(ru.ru_utime); 55 tp->tms_stime = CONVTCK(ru.ru_stime); 56 if (getrusage(RUSAGE_CHILDREN, &ru) < 0) 57 return ((clock_t)-1); 58 tp->tms_cutime = CONVTCK(ru.ru_utime); 59 tp->tms_cstime = CONVTCK(ru.ru_stime); 60 if (clock_gettime(CLOCK_MONOTONIC, &t)) 61 return ((clock_t)-1); 62 c = t.tv_sec * CLK_TCK + t.tv_nsec / (1000000000 / CLK_TCK); 63 return (c); 64 } 65