/* Test program for POSIX clock_* functions.

   Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>

#include <string.h>

#include <time.h>

#include <stdint.h>

/* We want to see output immediately.  */

#define STDOUT_UNBUFFERED

/* We expect to run at least 10 seconds.  */

#define TIMEOUT 15

static int

clock_test (clockid_t cl)

{

  struct timespec old_ts;

  struct timespec ts;

  struct timespec waitit;

  int result = 0;

  int i;

  memset (&ts, '\0', sizeof ts);

  waitit.tv_sec = 0;

  waitit.tv_nsec = 500000000;

  /* Get and print resolution of the clock.  */

  if (clock_getres (cl, &ts) == 0)

    {

      if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)

	{

	  printf ("clock %d: nanosecond value of resolution wrong\n", cl);

	  result = 1;

	}

      else

	printf ("clock %d: resolution = %jd.%09jd secs\n",

		cl, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);

    }

  else

    {

      printf ("clock %d: cannot get resolution\n", cl);

      result = 1;

    }

  memset (&ts, '\0', sizeof ts);

  memset (&old_ts, '\0', sizeof old_ts);

  /* Next get the current time value a few times.  */

  for (i = 0; i < 10; ++i)

    {

      if (clock_gettime (cl, &ts) == 0)

	{

	  if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)

	    {

	      printf ("clock %d: nanosecond value of time wrong (try %d)\n",

		      cl, i);

	      result = 1;

	    }

	  else

	    {

	      printf ("clock %d: time = %jd.%09jd secs\n",

		      cl, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);

	      if (memcmp (&ts, &old_ts, sizeof ts) == 0)

		{

		  printf ("clock %d: time hasn't changed (try %d)\n", cl, i);

		  result = 1;

		  old_ts = ts;

		}

	    }

	}

      else

	{

	  printf ("clock %d: cannot get time (try %d)\n", cl, i);

	  result = 1;

	}

      /* Wait a bit before the next iteration.  */

      nanosleep (&waitit, NULL);

    }

  return result;

}

static int

do_test (void)

{

  clockid_t cl;

  int result;

  result = clock_test (CLOCK_REALTIME);

  if (clock_getcpuclockid (0, &cl) == 0)

    /* XXX It's not yet a bug when this fails.  */

    clock_test (cl);

  else

	  printf("CPU clock unavailble, skipping test\n");

  return result;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"