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/* This test program is part of GDB, The GNU debugger.

   Copyright 2004, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Originally written by Jeff Johnston <jjohnstn@redhat.com>,

   contributed by Red Hat

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <pthread.h>

#include <semaphore.h>

#include <stdio.h>

#include <limits.h>

#include <errno.h>

sem_t semaphore;

void *

thread_function (void *arg)

{

  printf ("Thread executing\n");

  while (sem_wait (&semaphore) != 0)

    {

      if (errno != EINTR)

        {

          perror ("thread_function");

          return;

        }

    }

  return NULL;

}

int

main (int argc, char **argv)

{

  pthread_attr_t attr;

  pthread_attr_init (&attr);

  pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);

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

    {

      perror ("semaphore");

      return -1;

    }

  /* Create a thread, wait for it to complete.  */

  {

    pthread_t thread;

    pthread_create (&thread, &attr, thread_function, NULL);

    sem_post (&semaphore);

    pthread_join (thread, NULL);

  }

  pthread_attr_destroy (&attr);

  return 0;

}