/* 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 <unistd.h>

static int

do_test (void)

{

  sem_t s;

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

    {

      puts ("init failed");

      return 1;

    }

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

    {

      puts ("1st wait failed");

      return 1;

    }

  if (sem_post (&s) == -1)

    {

      puts ("1st post failed");

      return 1;

    }

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

    {

      puts ("1st trywait failed");

      return 1;

    }

  errno = 0;

  if (TEMP_FAILURE_RETRY (sem_trywait (&s)) != -1)

    {

      puts ("2nd trywait succeeded");

      return 1;

    }

  else if (errno != EAGAIN)

    {

      puts ("2nd trywait did not set errno to EAGAIN");

      return 1;

    }

  if (sem_post (&s) == -1)

    {

      puts ("2nd post failed");

      return 1;

    }

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

    {

      puts ("2nd wait failed");

      return 1;

    }

  if (sem_destroy (&s) == -1)

    {

      puts ("destroy failed");

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

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