/* 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 <pthread.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;

static void *

tf (void *arg)

{

  if (pthread_mutex_lock (&lock) != 0)

    {

      puts ("child: mutex_lock failed");

      return NULL;

    }

  return (void *) 42l;

}

static int

do_test (void)

{

  pthread_t th;

  if (pthread_mutex_lock (&lock) != 0)

    {

      puts ("mutex_lock failed");

      exit (1);

    }

  if (pthread_create (&th, NULL, tf, NULL) != 0)

    {

      puts ("mutex_create failed");

      exit (1);

    }

  void *status;

  int val = pthread_tryjoin_np (th, &status);

  if (val == 0)

    {

      puts ("1st tryjoin succeeded");

      exit (1);

    }

  else if (val != EBUSY)

    {

      puts ("1st tryjoin didn't return EBUSY");

      exit (1);

    }

  if (pthread_mutex_unlock (&lock) != 0)

    {

      puts ("mutex_unlock failed");

      exit (1);

    }

  while ((val = pthread_tryjoin_np (th, &status)) != 0)

    {

      if (val != EBUSY)

	{

	  printf ("tryjoin returned %s (%d), expected only 0 or EBUSY\n",

		  strerror (val), val);

	  exit (1);

	}

      /* Delay minimally.  */

      struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };

      nanosleep (&ts, NULL);

    }

  if (status != (void *) 42l)

    {

      printf ("return value %p, expected %p\n", status, (void *) 42l);

      exit (1);

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

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