66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
//
|
|
// Copyright (C) 2007, 2008, 2009 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 NULL;
|
|
}
|
|
|
|
int
|
|
get_foo (void)
|
|
{
|
|
pthread_t new_thread;
|
|
|
|
if (pthread_create (&new_thread, NULL, do_something, NULL) != 0)
|
|
std::abort ();
|
|
|
|
if (pthread_join (new_thread, NULL) != 0)
|
|
std::abort ();
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
static int foo __attribute__((unused)) = get_foo ();
|
|
return 0;
|
|
}
|