lib/gettime.c

   1 /* gettime -- get the system clock
   2
   3    Copyright (C) 2002, 2004-2007, 2009-2017 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Paul Eggert.  */
  19
  20 #include <config.h>
  21
  22 #include "timespec.h"
  23
  24 #include <sys/time.h>
  25
  26 /* Get the system time into *TS.  */
  27
  28 void
  29 gettime (struct timespec *ts)
  30 {
  31 #if HAVE_NANOTIME
  32   nanotime (ts);
  33 #else
  34
  35 # if defined CLOCK_REALTIME && HAVE_CLOCK_GETTIME
  36   if (clock_gettime (CLOCK_REALTIME, ts) == 0)
  37     return;
  38 # endif
  39
  40   {
  41     struct timeval tv;
  42     gettimeofday (&tv, NULL);
  43     ts->tv_sec = tv.tv_sec;
  44     ts->tv_nsec = tv.tv_usec * 1000;
  45   }
  46
  47 #endif
  48 }