lib/gettime.c

   1 /* gettime -- get the system clock
   2
   3    Copyright (C) 2002, 2004-2007, 2009-2024 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation, either version 3 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser 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 defined CLOCK_REALTIME && HAVE_CLOCK_GETTIME
  32   clock_gettime (CLOCK_REALTIME, ts);
  33 #elif defined HAVE_TIMESPEC_GET
  34   timespec_get (ts, TIME_UTC);
  35 #else
  36   struct timeval tv;
  37   gettimeofday (&tv, NULL);
  38   *ts = (struct timespec) { .tv_sec  = tv.tv_sec,
  39                             .tv_nsec = tv.tv_usec * 1000 };
  40 #endif
  41 }
  42
  43 /* Return the current system time as a struct timespec.  */
  44
  45 struct timespec
  46 current_timespec (void)
  47 {
  48   struct timespec ts;
  49   gettime (&ts);
  50   return ts;
  51 }