/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   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 <semaphore.h>

#include <signal.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

static int do_test (void);

#define TEST_FUNCTION do_test ()

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

static pthread_t receiver;

static sem_t sem;

static pthread_barrier_t b;

static void

handler (int sig)

{

  if (sig != SIGUSR1)

    {

      write_message ("wrong signal\n");

      _exit (1);

    }

  if (pthread_self () != receiver)

    {

      write_message ("not the intended receiver\n");

      _exit (1);

    }

  if (sem_post (&sem) != 0)

    {

      write_message ("sem_post failed\n");

      _exit (1);

    }

}

static void *

tf (void *a)

{

  int e = pthread_barrier_wait (&b);

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

    {

      puts ("child: barrier_wait failed");

      exit (1);

    }

  return NULL;

}

int

do_test (void)

{

  struct sigaction sa;

  sigemptyset (&sa.sa_mask);

  sa.sa_flags = 0;

  sa.sa_handler = handler;

  if (sigaction (SIGUSR1, &sa, NULL) != 0)

    {

      puts ("sigaction failed");

      exit (1);

    }

#define N 20

  if (pthread_barrier_init (&b, NULL, N + 1) != 0)

    {

      puts ("barrier_init failed");

      exit (1);

    }

  pthread_attr_t a;

  if (pthread_attr_init (&a) != 0)

    {

      puts ("attr_init failed");

      exit (1);

    }

  if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0)

    {

      puts ("attr_setstacksize failed");

      return 1;

    }

  pthread_t th[N];

  int i;

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

    if (pthread_create (&th[i], &a, tf, NULL) != 0)

      {

	puts ("create failed");

	exit (1);

      }

  if (pthread_attr_destroy (&a) != 0)

    {

      puts ("attr_destroy failed");

      exit (1);

    }

  if (sem_init (&sem, 0, 0) != 0)

    {

      puts ("sem_init failed");

      exit (1);

    }

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

    {

      receiver = th[i % N];

      if (pthread_kill (receiver, SIGUSR1) != 0)

	{

	  puts ("kill failed");

	  exit (1);

	}

      if (TEMP_FAILURE_RETRY (sem_wait (&sem)) != 0)

	{

	  puts ("sem_wait failed");

	  exit (1);

	}

    }

  int e = pthread_barrier_wait (&b);

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

    {

      puts ("barrier_wait failed");

      exit (1);

    }

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

    if (pthread_join (th[i], NULL) != 0)

      {

	puts ("join failed");

	exit (1);

      }

  return 0;

}