/* $OpenBSD: times.c,v 1.10 2020/07/06 13:33:06 pirofti Exp $ */ /*- * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include /* * Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000, * but this would overflow if we switch to nanosec. */ #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) clock_t times(struct tms *tp) { struct rusage ru; struct timespec ts; if (getrusage(RUSAGE_SELF, &ru) == -1) return ((clock_t)-1); tp->tms_utime = CONVTCK(ru.ru_utime); tp->tms_stime = CONVTCK(ru.ru_stime); if (getrusage(RUSAGE_CHILDREN, &ru) == -1) return ((clock_t)-1); tp->tms_cutime = CONVTCK(ru.ru_utime); tp->tms_cstime = CONVTCK(ru.ru_stime); if (WRAP(clock_gettime)(CLOCK_MONOTONIC, &ts) == -1) return ((clock_t)-1); return (ts.tv_sec * CLK_TCK + ts.tv_nsec / (1000000000 / CLK_TCK)); }