| /* Copyright (C) 2005 Free Software Foundation, Inc. |
| Contributed by Richard Henderson <rth@redhat.com>. |
| |
| This file is part of the GNU OpenMP Library (libgomp). |
| |
| Libgomp is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for |
| more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with libgomp; see the file COPYING.LIB. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| /* As a special exception, if you link this library with other files, some |
| of which are compiled with GCC, to produce an executable, this library |
| does not by itself cause the resulting executable to be covered by the |
| GNU General Public License. This exception does not however invalidate |
| any other reasons why the executable file might be covered by the GNU |
| General Public License. */ |
| |
| /* This file contains system specific timer routines. It is expected that |
| a system may well want to write special versions of each of these. |
| |
| The following implementation uses the most simple POSIX routines. |
| If present, POSIX 4 clocks should be used instead. */ |
| |
| #include "libgomp.h" |
| #include <unistd.h> |
| #if TIME_WITH_SYS_TIME |
| # include <sys/time.h> |
| # include <time.h> |
| #else |
| # if HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| # else |
| # include <time.h> |
| # endif |
| #endif |
| |
| |
| double |
| omp_get_wtime (void) |
| { |
| #ifdef HAVE_CLOCK_GETTIME |
| struct timespec ts; |
| # ifdef CLOCK_MONOTONIC |
| if (clock_gettime (CLOCK_MONOTONIC, &ts) < 0) |
| # endif |
| clock_gettime (CLOCK_REALTIME, &ts); |
| return ts.tv_sec + ts.tv_nsec / 1e9; |
| #else |
| struct timeval tv; |
| gettimeofday (&tv, NULL); |
| return tv.tv_sec + tv.tv_usec / 1e6; |
| #endif |
| } |
| |
| double |
| omp_get_wtick (void) |
| { |
| #ifdef HAVE_CLOCK_GETTIME |
| struct timespec ts; |
| # ifdef CLOCK_MONOTONIC |
| if (clock_getres (CLOCK_MONOTONIC, &ts) < 0) |
| # endif |
| clock_getres (CLOCK_REALTIME, &ts); |
| return ts.tv_sec + ts.tv_nsec / 1e9; |
| #else |
| return 1.0 / sysconf(_SC_CLK_TCK); |
| #endif |
| } |
| |
| ialias (omp_get_wtime) |
| ialias (omp_get_wtick) |