/* Test for sem_post race: bug 14532.

   Copyright (C) 2012-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 <pthread.h>

#include <semaphore.h>

#include <stdio.h>

#define NTHREADS 10

#define NITER 100000

sem_t sem;

int c;

volatile int thread_fail;

static void *

tf (void *arg)

{

  for (int i = 0; i < NITER; i++)

    {

      if (sem_wait (&sem) != 0)

	{

	  perror ("sem_wait");

	  thread_fail = 1;

	}

      ++c;

      if (sem_post (&sem) != 0)

	{

	  perror ("sem_post");

	  thread_fail = 1;

	}

    }

  return NULL;

}

static int

do_test (void)

{

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

    {

      perror ("sem_init");

      return 1;

    }

  pthread_t th[NTHREADS];

  for (int i = 0; i < NTHREADS; i++)

    {

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

	{

	  puts ("pthread_create failed");

	  return 1;

	}

    }

  if (sem_post (&sem) != 0)

    {

      perror ("sem_post");

      return 1;

    }

  for (int i = 0; i < NTHREADS; i++)

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

      {

	puts ("pthread_join failed");

	return 1;

      }

  if (c != NTHREADS * NITER)

    {

      printf ("c = %d, should be %d\n", c, NTHREADS * NITER);

      return 1;

    }

  return thread_fail;

}

#define TIMEOUT 10

#define TEST_FUNCTION do_test ()

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