| 1 | /* Copyright (C) 2005, 2009 Free Software Foundation, Inc. |
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| 2 | Contributed by Richard Henderson <rth@redhat.com>. |
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| 3 | |
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| 4 | This file is part of the GNU OpenMP Library (libgomp). |
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| 5 | |
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| 6 | Libgomp is free software; you can redistribute it and/or modify it |
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| 7 | under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 3, or (at your option) |
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| 9 | any later version. |
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| 10 | |
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| 11 | Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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| 14 | more details. |
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| 15 | |
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| 16 | Under Section 7 of GPL version 3, you are granted additional |
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| 17 | permissions described in the GCC Runtime Library Exception, version |
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| 18 | 3.1, as published by the Free Software Foundation. |
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| 19 | |
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| 20 | You should have received a copy of the GNU General Public License and |
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| 21 | a copy of the GCC Runtime Library Exception along with this program; |
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| 22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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| 23 | <http://www.gnu.org/licenses/>. */ |
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| 24 | |
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| 25 | /* This file contains system specific timer routines. It is expected that |
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| 26 | a system may well want to write special versions of each of these. |
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| 27 | |
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| 28 | The following implementation uses the most simple POSIX routines. |
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| 29 | If present, POSIX 4 clocks should be used instead. */ |
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| 30 | |
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| 31 | #include <gomp/libgomp.h> |
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| 32 | #include <unistd.h> |
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| 33 | #if TIME_WITH_SYS_TIME |
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| 34 | # include <sys/time.h> |
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| 35 | # include <time.h> |
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| 36 | #else |
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| 37 | # if HAVE_SYS_TIME_H |
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| 38 | # include <sys/time.h> |
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| 39 | # else |
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| 40 | # include <time.h> |
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| 41 | # endif |
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| 42 | #endif |
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| 43 | |
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| 44 | /* TODO: implements tv */ |
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| 45 | double |
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| 46 | omp_get_wtime (void) |
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| 47 | { |
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| 48 | #ifdef HAVE_CLOCK_GETTIME |
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| 49 | struct timespec ts; |
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| 50 | # ifdef CLOCK_MONOTONIC |
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| 51 | if (clock_gettime (CLOCK_MONOTONIC, &ts) < 0) |
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| 52 | # endif |
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| 53 | clock_gettime (CLOCK_REALTIME, &ts); |
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| 54 | return ts.tv_sec + ts.tv_nsec / 1e9; |
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| 55 | #else |
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| 56 | #ifndef _ALMOS_ |
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| 57 | struct timeval tv; |
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| 58 | gettimeofday (&tv, NULL); |
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| 59 | return tv.tv_sec + tv.tv_usec / 1e6; |
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| 60 | #else |
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| 61 | return clock(); |
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| 62 | #endif |
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| 63 | #endif |
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| 64 | } |
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| 65 | |
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| 66 | double |
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| 67 | omp_get_wtick (void) |
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| 68 | { |
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| 69 | #ifdef HAVE_CLOCK_GETTIME |
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| 70 | struct timespec ts; |
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| 71 | # ifdef CLOCK_MONOTONIC |
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| 72 | if (clock_getres (CLOCK_MONOTONIC, &ts) < 0) |
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| 73 | # endif |
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| 74 | clock_getres (CLOCK_REALTIME, &ts); |
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| 75 | return ts.tv_sec + ts.tv_nsec / 1e9; |
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| 76 | #else |
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| 77 | return 1.0 / sysconf(_SC_CLK_TCK); |
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| 78 | #endif |
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| 79 | } |
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| 80 | |
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| 81 | ialias (omp_get_wtime) |
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| 82 | ialias (omp_get_wtick) |
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