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//

// Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)

// any later version.

//

// This 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 General Public License for more details.

//

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

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* } }

// { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-darwin* alpha*-*-osf* } }

#include <cstdlib>

#include <pthread.h>

// This used to deadlock with the old libstdc++ because there is only one

// global mutex guarding initialization of statics and it is held during by

// the initializer thread of a static until the variable is completely

// initialized. If the initializer thread creates and waits for another thread

// which also initializes a static variable, there will be a deadlock because

// the first thread is holding the mutex and waiting for the second thread,

// which is blocked when it is acquiring the mutex.

int

get_bar (void)

{

  return 1;

}

void*

do_something (void *arg)

{

  static int bar __attribute__((unused)) = get_bar ();

  return 0;

}

int

get_foo (void)

{

  pthread_t new_thread;

  if (pthread_create (&new_thread, 0, do_something, 0) != 0)

    std::abort ();

  if (pthread_join (new_thread, 0) != 0)

    std::abort ();

  return 1;

}

int

main (int argc, char **argv)

{

  static int foo __attribute__((unused)) = get_foo ();

  return 0;

}