1 1.1.1.12 mrg /* Copyright (C) 2005-2024 Free Software Foundation, Inc. 2 1.1 mrg Contributed by Richard Henderson <rth (at) redhat.com>. 3 1.1 mrg 4 1.1.1.3 mrg This file is part of the GNU Offloading and Multi Processing Library 5 1.1.1.3 mrg (libgomp). 6 1.1 mrg 7 1.1 mrg Libgomp is free software; you can redistribute it and/or modify it 8 1.1 mrg under the terms of the GNU General Public License as published by 9 1.1 mrg the Free Software Foundation; either version 3, or (at your option) 10 1.1 mrg any later version. 11 1.1 mrg 12 1.1 mrg Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY 13 1.1 mrg WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14 1.1 mrg FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 1.1 mrg more details. 16 1.1 mrg 17 1.1 mrg Under Section 7 of GPL version 3, you are granted additional 18 1.1 mrg permissions described in the GCC Runtime Library Exception, version 19 1.1 mrg 3.1, as published by the Free Software Foundation. 20 1.1 mrg 21 1.1 mrg You should have received a copy of the GNU General Public License and 22 1.1 mrg a copy of the GCC Runtime Library Exception along with this program; 23 1.1 mrg see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 1.1 mrg <http://www.gnu.org/licenses/>. */ 25 1.1 mrg 26 1.1 mrg /* This file contains system specific timer routines. It is expected that 27 1.1 mrg a system may well want to write special versions of each of these. 28 1.1 mrg 29 1.1 mrg The following implementation uses the most simple POSIX routines. 30 1.1 mrg If present, POSIX 4 clocks should be used instead. */ 31 1.1 mrg 32 1.1 mrg #include "libgomp.h" 33 1.1 mrg #include <unistd.h> 34 1.1 mrg #if TIME_WITH_SYS_TIME 35 1.1 mrg # include <sys/time.h> 36 1.1 mrg # include <time.h> 37 1.1 mrg #else 38 1.1 mrg # if HAVE_SYS_TIME_H 39 1.1 mrg # include <sys/time.h> 40 1.1 mrg # else 41 1.1 mrg # include <time.h> 42 1.1 mrg # endif 43 1.1 mrg #endif 44 1.1 mrg 45 1.1 mrg 46 1.1 mrg double 47 1.1 mrg omp_get_wtime (void) 48 1.1 mrg { 49 1.1 mrg #ifdef HAVE_CLOCK_GETTIME 50 1.1 mrg struct timespec ts; 51 1.1 mrg # ifdef CLOCK_MONOTONIC 52 1.1 mrg if (clock_gettime (CLOCK_MONOTONIC, &ts) < 0) 53 1.1 mrg # endif 54 1.1 mrg clock_gettime (CLOCK_REALTIME, &ts); 55 1.1 mrg return ts.tv_sec + ts.tv_nsec / 1e9; 56 1.1 mrg #else 57 1.1 mrg struct timeval tv; 58 1.1 mrg gettimeofday (&tv, NULL); 59 1.1 mrg return tv.tv_sec + tv.tv_usec / 1e6; 60 1.1 mrg #endif 61 1.1 mrg } 62 1.1 mrg 63 1.1 mrg double 64 1.1 mrg omp_get_wtick (void) 65 1.1 mrg { 66 1.1 mrg #ifdef HAVE_CLOCK_GETTIME 67 1.1 mrg struct timespec ts; 68 1.1 mrg # ifdef CLOCK_MONOTONIC 69 1.1 mrg if (clock_getres (CLOCK_MONOTONIC, &ts) < 0) 70 1.1 mrg # endif 71 1.1 mrg clock_getres (CLOCK_REALTIME, &ts); 72 1.1 mrg return ts.tv_sec + ts.tv_nsec / 1e9; 73 1.1 mrg #else 74 1.1 mrg return 1.0 / sysconf(_SC_CLK_TCK); 75 1.1 mrg #endif 76 1.1 mrg } 77 1.1 mrg 78 1.1 mrg ialias (omp_get_wtime) 79 1.1 mrg ialias (omp_get_wtick) 80
Indexes created Thu Apr 09 00:23:28 UTC 2026