/* 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>

static pthread_mutex_t m;

static pthread_barrier_t b;

static void *

tf (void *arg)

{

  int e = pthread_mutex_unlock (&m);

  if (e == 0)

    {

      puts ("child: 1st mutex_unlock succeeded");

      exit (1);

    }

  else if (e != EPERM)

    {

      puts ("child: 1st mutex_unlock error != EPERM");

      exit (1);

    }

  e = pthread_mutex_trylock (&m);

  if (e == 0)

    {

      puts ("child: 1st trylock suceeded");

      exit (1);

    }

  if (e != EBUSY)

    {

      puts ("child: 1st trylock didn't return EBUSY");

      exit (1);

    }

  e = pthread_barrier_wait (&b);

  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)

    {

      puts ("child: 1st barrier_wait failed");

      exit (1);

    }

  e = pthread_barrier_wait (&b);

  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)

    {

      puts ("child: 2nd barrier_wait failed");

      exit (1);

    }

  e = pthread_mutex_unlock (&m);

  if (e == 0)

    {

      puts ("child: 2nd mutex_unlock succeeded");

      exit (1);

    }

  else if (e != EPERM)

    {

      puts ("child: 2nd mutex_unlock error != EPERM");

      exit (1);

    }

  if (pthread_mutex_trylock (&m) != 0)

    {

      puts ("child: 2nd trylock failed");

      exit (1);

    }

  if (pthread_mutex_unlock (&m) != 0)

    {

      puts ("child: 3rd mutex_unlock failed");

      exit (1);

    }

  return NULL;

}

static int

do_test (void)

{

  pthread_mutexattr_t a;

  int e;

  if (pthread_mutexattr_init (&a) != 0)

    {

      puts ("mutexattr_init failed");

      return 1;

    }

  if (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_ERRORCHECK) != 0)

    {

      puts ("mutexattr_settype failed");

      return 1;

    }

#ifdef ENABLE_PI

  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)

    {

      puts ("pthread_mutexattr_setprotocol failed");

      return 1;

    }

#endif

  e = pthread_mutex_init (&m, &a);

  if (e != 0)

    {

#ifdef ENABLE_PI

      if (e == ENOTSUP)

	{

	  puts ("PI mutexes unsupported");

	  return 0;

	}

#endif

      puts ("mutex_init failed");

      return 1;

    }

  if (pthread_barrier_init (&b, NULL, 2) != 0)

    {

      puts ("barrier_init failed");

      return 1;

    }

  e = pthread_mutex_unlock (&m);

  if (e == 0)

    {

      puts ("1st mutex_unlock succeeded");

      return 1;

    }

  else if (e != EPERM)

    {

      puts ("1st mutex_unlock error != EPERM");

      return 1;

    }

  if (pthread_mutex_lock (&m) != 0)

    {

      puts ("mutex_lock failed");

      return 1;

    }

  e = pthread_mutex_lock (&m);

  if (e == 0)

    {

      puts ("2nd mutex_lock succeeded");

      return 1;

    }

  else if (e != EDEADLK)

    {

      puts ("2nd mutex_lock error != EDEADLK");

      return 1;

    }

  pthread_t th;

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

    {

      puts ("create failed");

      return 1;

    }

  e = pthread_barrier_wait (&b);

  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)

    {

      puts ("1st barrier_wait failed");

      return 1;

    }

  if (pthread_mutex_unlock (&m) != 0)

    {

      puts ("2nd mutex_unlock failed");

      return 1;

    }

  e = pthread_mutex_unlock (&m);

  if (e == 0)

    {

      puts ("3rd mutex_unlock succeeded");

      return 1;

    }

  else if (e != EPERM)

    {

      puts ("3rd mutex_unlock error != EPERM");

      return 1;

    }

  e = pthread_barrier_wait (&b);

  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)

    {

      puts ("2nd barrier_wait failed");

      return 1;

    }

  if (pthread_join (th, NULL) != 0)

    {

      puts ("join failed");

      return 1;

    }

  if (pthread_mutex_destroy (&m) != 0)

    {

      puts ("mutex_destroy failed");

      return 1;

    }

  if (pthread_barrier_destroy (&b) != 0)

    {

      puts ("barrier_destroy failed");

      return 1;

    }

  if (pthread_mutexattr_destroy (&a) != 0)

    {

      puts ("mutexattr_destroy failed");

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

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