usr/src/test/libc-tests/tests/timespec_get.c

   1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11
  12 /*
  13  * Copyright 2016 Joyent, Inc.
  14  */
  15
  16 /*
  17  * Basic tests for timespec_get(3C).
  18  */
  19
  20 #include <time.h>
  21 #include <limits.h>
  22 #include <sys/debug.h>
  23
  24 static int
  25 timespec_cmp(const struct timespec *ls, const struct timespec *rs)
  26 {
  27         if (ls->tv_sec > rs->tv_sec)
  28                 return (-1);
  29         if (ls->tv_sec < rs->tv_sec)
  30                 return (1);
  31         if (ls->tv_nsec > rs->tv_nsec)
  32                 return (-1);
  33         if (ls->tv_nsec > rs->tv_nsec)
  34                 return (-1);
  35         if (ls->tv_nsec < rs->tv_nsec)
  36                 return (1);
  37
  38         return (0);
  39 }
  40
  41 int
  42 main(void)
  43 {
  44         struct timespec ts, pre, post;
  45
  46         VERIFY0(timespec_get(&ts, TIME_UTC + 1));
  47         VERIFY0(timespec_get(&ts, TIME_UTC - 1));
  48         VERIFY0(timespec_get(&ts, UINT16_MAX));
  49
  50         VERIFY0(clock_gettime(CLOCK_REALTIME, &pre));
  51         VERIFY3S(timespec_get(&ts, TIME_UTC), ==, TIME_UTC);
  52         VERIFY0(clock_gettime(CLOCK_REALTIME, &post));
  53         VERIFY3S(timespec_cmp(&pre, &post), ==, 1);
  54
  55         VERIFY3S(timespec_cmp(&pre, &ts), ==, 1);
  56         VERIFY3S(timespec_cmp(&ts, &post), ==, 1);
  57
  58         return (0);
  59 }