gl/timespec.h

   1 /* timespec -- System time interface
   2
   3    Copyright (C) 2000, 2002, 2004-2005, 2007, 2009-2010 Free Software
   4    Foundation, 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 #if ! defined TIMESPEC_H
  20 # define TIMESPEC_H
  21
  22 # include <time.h>
  23
  24 /* Return negative, zero, positive if A < B, A == B, A > B, respectively.
  25    Assume the nanosecond components are in range, or close to it.  */
  26 static inline int
  27 timespec_cmp (struct timespec a, struct timespec b)
  28 {
  29   return (a.tv_sec < b.tv_sec ? -1
  30           : a.tv_sec > b.tv_sec ? 1
  31           : a.tv_nsec < b.tv_nsec ? -1
  32           : a.tv_nsec > b.tv_nsec ? 1
  33           : 0);
  34 }
  35
  36 void gettime (struct timespec *);
  37 int settime (struct timespec const *);
  38
  39 #endif