1  /* gettime -- get the system clock
       2  
       3     Copyright (C) 2002, 2004-2007, 2009-2023 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  }