2 // { dg-additional-options "-pthread" { target pthread } }
3 // { dg-require-effective-target c++11 }
4 // { dg-require-gthreads "" }
5 // { dg-require-sched-yield "" }
7 // Copyright (C) 2011-2021 Free Software Foundation, Inc.
9 // This file is part of the GNU ISO C++ Library. This library is free
10 // software; you can redistribute it and/or modify it under the
11 // terms of the GNU General Public License as published by the
12 // Free Software Foundation; either version 3, or (at your option)
15 // This library is distributed in the hope that it will be useful,
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 // GNU General Public License for more details.
20 // You should have received a copy of the GNU General Public License along
21 // with this library; see the file COPYING3. If not see
22 // <http://www.gnu.org/licenses/>.
24 #include <condition_variable>
32 ~scoped_thread() { if (t
.joinable()) t
.join(); }
38 typedef std::unique_lock
<std::mutex
> Lock
;
41 std::condition_variable_any cond
;
42 unsigned int product
= 0;
43 const unsigned int count
= 10;
45 // writing to stream causes timing changes which makes deadlock easier
46 // to reproduce - do not remove
47 std::ostringstream out
;
50 std::array
<scoped_thread
, 2> threads
;
51 for (std::size_t i
= 0; i
< threads
.size(); ++i
)
55 for (unsigned int i
= 0; i
< count
; ++i
)
57 std::this_thread::yield();
62 << std::this_thread::get_id()
63 << ' ' << product
<< std::endl
;
69 for (std::size_t i
= 0; i
< threads
.size() * count
; ++i
)
71 std::this_thread::yield();
74 out
<< "setting product " << std::this_thread::get_id()
75 << ' ' << product
<< std::endl
;