kc3-lang/gnulib/lib/gethrxtime.c

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• Hash : 6ef9a073
  Author :
  Date : 2005-05-15T04:45:43
  

  Sync from coreutils.
  * modules/yesno (Depends-on): Add getline.
  * gethrxtime.c, gethrxtime.h, getpass.h, mountlist.h, path-concat.c,
  regex.h, strtoll.c, unlocked-io.h, xtime.h:
  White space changes only.
  * makepath.c (make_path): Port to hosts where leading "//" is special.
  * yesno.c: Include getline.h, not ctype.h.
  (yesno): Don't remove leading white space; POSIX doesn't allow it.
  Use getline to remove arbitrary restriction on response length.
  

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• lib/gethrxtime.c

• /* gethrxtime -- get high resolution real time
  
     Copyright (C) 2005 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2, or (at your option)
     any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software Foundation,
     Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  
  /* Written by Paul Eggert.  */
  
  #ifdef HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  #include "gethrxtime.h"
  
  #include <sys/types.h>
  #if TIME_WITH_SYS_TIME
  # include <sys/time.h>
  # include <time.h>
  #else
  # if HAVE_SYS_TIME_H
  #  include <sys/time.h>
  # else
  #  include <time.h>
  # endif
  #endif
  
  /* Get the time of a high-resolution clock, preferably one that is not
     subject to resetting or drifting.  */
  
  xtime_t
  gethrxtime (void)
  {
  #if HAVE_NANOUPTIME
    {
      struct timespec ts;
      nanouptime (&ts);
      return xtime_make (ts.tv_sec, ts.tv_nsec);
    }
  #else
  
  # if defined CLOCK_MONOTONIC && HAVE_CLOCK_GETTIME
    {
      struct timespec ts;
      if (clock_gettime (CLOCK_MONOTONIC, &ts) == 0)
        return xtime_make (ts.tv_sec, ts.tv_nsec);
    }
  # endif
  
  # if HAVE_MICROUPTIME
    {
      struct timeval tv;
      microuptime (&tv);
      return xtime_make (tv.tv_sec, 1000 * tv.tv_usec);
    }
  
    /* No monotonically increasing clocks are available; fall back on a
       clock that might jump backwards, since it's the best we can do.  */
  # elif HAVE_GETTIMEOFDAY && XTIME_PRECISION != 1
    {
      struct timeval tv;
      gettimeofday (&tv, NULL);
      return xtime_make (tv.tv_sec, 1000 * tv.tv_usec);
    }
  # else
    return xtime_make (time (NULL), 0);
  # endif
  #endif
  }
  

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