x5/bsdtimespec.h

   1 /*      $OpenBSD: time.h,v 1.36 2016/09/12 19:41:20 guenther Exp $      */
   2 /*      $NetBSD: time.h,v 1.18 1996/04/23 10:29:33 mycroft Exp $        */
   3
   4 /*
   5  * Copyright (c) 1982, 1986, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)time.h      8.2 (Berkeley) 7/10/94
  33  */
  34
  35 /* Operations on timespecs. */
  36 #ifndef timespecclear
  37 #define timespecclear(tsp)              (tsp)->tv_sec = (tsp)->tv_nsec = 0
  38 #endif
  39
  40 #ifndef timespecisset
  41 #define timespecisset(tsp)              ((tsp)->tv_sec || (tsp)->tv_nsec)
  42 #endif
  43
  44 #ifndef timespeccmp
  45 #define timespeccmp(tsp, usp, cmp)                                      \
  46         (((tsp)->tv_sec == (usp)->tv_sec) ?                             \
  47             ((tsp)->tv_nsec cmp (usp)->tv_nsec) :                       \
  48             ((tsp)->tv_sec cmp (usp)->tv_sec))
  49 #endif
  50
  51 #ifndef timespecadd
  52 #define timespecadd(tsp, usp, vsp)                                      \
  53         do {                                                            \
  54                 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec;          \
  55                 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec;       \
  56                 if ((vsp)->tv_nsec >= 1000000000L) {                    \
  57                         (vsp)->tv_sec++;                                \
  58                         (vsp)->tv_nsec -= 1000000000L;                  \
  59                 }                                                       \
  60         } while (0)
  61 #endif
  62
  63 #ifndef timespecsub
  64 #define timespecsub(tsp, usp, vsp)                                      \
  65         do {                                                            \
  66                 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;          \
  67                 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;       \
  68                 if ((vsp)->tv_nsec < 0) {                               \
  69                         (vsp)->tv_sec--;                                \
  70                         (vsp)->tv_nsec += 1000000000L;                  \
  71                 }                                                       \
  72         } while (0)
  73 #endif