1169695Skan/* Copyright (C) 2005 Free Software Foundation, Inc.
2169695Skan   Contributed by Richard Henderson <rth@redhat.com>.
3169695Skan
4169695Skan   This file is part of the GNU OpenMP Library (libgomp).
5169695Skan
6169695Skan   Libgomp is free software; you can redistribute it and/or modify it
7169695Skan   under the terms of the GNU Lesser General Public License as published by
8169695Skan   the Free Software Foundation; either version 2.1 of the License, or
9169695Skan   (at your option) any later version.
10169695Skan
11169695Skan   Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
12169695Skan   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13169695Skan   FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
14169695Skan   more details.
15169695Skan
16169695Skan   You should have received a copy of the GNU Lesser General Public License
17169695Skan   along with libgomp; see the file COPYING.LIB.  If not, write to the
18169695Skan   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19169695Skan   MA 02110-1301, USA.  */
20169695Skan
21169695Skan/* As a special exception, if you link this library with other files, some
22169695Skan   of which are compiled with GCC, to produce an executable, this library
23169695Skan   does not by itself cause the resulting executable to be covered by the
24169695Skan   GNU General Public License.  This exception does not however invalidate
25169695Skan   any other reasons why the executable file might be covered by the GNU
26169695Skan   General Public License.  */
27169695Skan
28169695Skan/* This file contains system specific timer routines.  It is expected that
29169695Skan   a system may well want to write special versions of each of these.
30169695Skan
31169695Skan   The following implementation uses the most simple POSIX routines.
32169695Skan   If present, POSIX 4 clocks should be used instead.  */
33169695Skan
34169695Skan#include "libgomp.h"
35169695Skan#include <unistd.h>
36169695Skan#if TIME_WITH_SYS_TIME
37169695Skan# include <sys/time.h>
38169695Skan# include <time.h>
39169695Skan#else
40169695Skan# if HAVE_SYS_TIME_H
41169695Skan#  include <sys/time.h>
42169695Skan# else
43169695Skan#  include <time.h>
44169695Skan# endif
45169695Skan#endif
46169695Skan
47169695Skan
48169695Skandouble
49169695Skanomp_get_wtime (void)
50169695Skan{
51169695Skan#ifdef HAVE_CLOCK_GETTIME
52169695Skan  struct timespec ts;
53169695Skan# ifdef CLOCK_MONOTONIC
54169695Skan  if (clock_gettime (CLOCK_MONOTONIC, &ts) < 0)
55169695Skan# endif
56169695Skan    clock_gettime (CLOCK_REALTIME, &ts);
57169695Skan  return ts.tv_sec + ts.tv_nsec / 1e9;
58169695Skan#else
59169695Skan  struct timeval tv;
60169695Skan  gettimeofday (&tv, NULL);
61169695Skan  return tv.tv_sec + tv.tv_usec / 1e6;
62169695Skan#endif
63169695Skan}
64169695Skan
65169695Skandouble
66169695Skanomp_get_wtick (void)
67169695Skan{
68169695Skan#ifdef HAVE_CLOCK_GETTIME
69169695Skan  struct timespec ts;
70169695Skan# ifdef CLOCK_MONOTONIC
71169695Skan  if (clock_getres (CLOCK_MONOTONIC, &ts) < 0)
72169695Skan# endif
73169695Skan    clock_getres (CLOCK_REALTIME, &ts);
74169695Skan  return ts.tv_sec + ts.tv_nsec / 1e9;
75169695Skan#else
76169695Skan  return 1.0 / sysconf(_SC_CLK_TCK);
77169695Skan#endif
78169695Skan}
79169695Skan
80169695Skanialias (omp_get_wtime)
81169695Skanialias (omp_get_wtick)
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