usr/src/lib/libast/common/tm/tvgettime.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #include <tv.h>
  25 #include <tm.h>
  26
  27 #include "FEATURE/tvlib"
  28
  29 int
  30 tvgettime(Tv_t* tv)
  31 {
  32
  33 #if _lib_clock_gettime && defined(CLOCK_REALTIME)
  34
  35         struct timespec                 s;
  36
  37         clock_gettime(CLOCK_REALTIME, &s);
  38         tv->tv_sec = s.tv_sec;
  39         tv->tv_nsec = s.tv_nsec;
  40
  41 #else
  42
  43 #if defined(tmgettimeofday)
  44
  45         struct timeval                  v;
  46
  47         tmgettimeofday(&v);
  48         tv->tv_sec = v.tv_sec;
  49         tv->tv_nsec = v.tv_usec * 1000;
  50
  51 #else
  52
  53         static time_t                   s;
  54         static uint32_t                 n;
  55
  56         if ((tv->tv_sec = time(NiL)) != s)
  57         {
  58                 s = tv->tv_sec;
  59                 n = 0;
  60         }
  61         else
  62                 n += 1000;
  63         tv->tv_nsec = n;
  64
  65 #endif
  66
  67 #endif
  68
  69         return 0;
  70 }