/* Copyright (C) 2002-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   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 <errno.h>

#include <semaphore.h>

#include <stdio.h>

#include <time.h>

#include <unistd.h>

#include <sys/time.h>

static int

do_test (void)

{

  sem_t s;

  struct timespec ts;

  struct timeval tv;

  if (sem_init (&s, 0, 1) == -1)

    {

      puts ("sem_init failed");

      return 1;

    }

  if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1)

    {

      puts ("sem_wait failed");

      return 1;

    }

  if (gettimeofday (&tv, NULL) != 0)

    {

      puts ("gettimeofday failed");

      return 1;

    }

  TIMEVAL_TO_TIMESPEC (&tv, &ts);

  /* We wait for half a second.  */

  ts.tv_nsec += 500000000;

  if (ts.tv_nsec >= 1000000000)

    {

      ++ts.tv_sec;

      ts.tv_nsec -= 1000000000;

    }

  errno = 0;

  if (TEMP_FAILURE_RETRY (sem_timedwait (&s, &ts)) != -1)

    {

      puts ("sem_timedwait succeeded");

      return 1;

    }

  if (errno != ETIMEDOUT)

    {

      printf ("sem_timedwait return errno = %d instead of ETIMEDOUT\n",

	      errno);

      return 1;

    }

  struct timespec ts2;

  if (clock_gettime (CLOCK_REALTIME, &ts2) != 0)

    {

      puts ("clock_gettime failed");

      return 1;

    }

  if (ts2.tv_sec < ts.tv_sec

      || (ts2.tv_sec == ts.tv_sec && ts2.tv_nsec < ts.tv_nsec))

    {

      puts ("timeout too short");

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

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