code.delx.au - gnu-emacs/blob - lib/gettime.c

   1 /* gettime -- get the system clock
   2
   3    Copyright (C) 2002, 2004-2007, 2009-2015 Free Software Foundation,
   4    Inc.
   5
   6    This program is free software: you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Written by Paul Eggert.  */
  20
  21 #include <config.h>
  22
  23 #include "timespec.h"
  24
  25 #include <sys/time.h>
  26
  27 /* Get the system time into *TS.  */
  28
  29 void
  30 gettime (struct timespec *ts)
  31 {
  32 #if HAVE_NANOTIME
  33   nanotime (ts);
  34 #else
  35
  36 # if defined CLOCK_REALTIME && HAVE_CLOCK_GETTIME
  37   if (clock_gettime (CLOCK_REALTIME, ts) == 0)
  38     return;
  39 # endif
  40
  41   {
  42     struct timeval tv;
  43     gettimeofday (&tv, NULL);
  44     ts->tv_sec = tv.tv_sec;
  45     ts->tv_nsec = tv.tv_usec * 1000;
  46   }
  47
  48 #endif
  49 }