| // Copyright (C) 2020-2021 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-options "-std=gnu++2a" } |
| // { dg-do run { target c++2a } } |
| // { dg-require-gthreads "" } |
| // { dg-additional-options "-pthread" { target pthread } } |
| // { dg-add-options libatomic } |
| |
| #include <latch> |
| #include <atomic> |
| #include <thread> |
| #include <testsuite_hooks.h> |
| |
| void |
| test01() |
| { |
| std::latch l(3); |
| |
| VERIFY( !l.try_wait() ); |
| |
| auto fn = [&] |
| { |
| l.count_down(); |
| }; |
| |
| std::thread t0(fn); |
| std::thread t1(fn); |
| |
| l.arrive_and_wait(); |
| t0.join(); |
| t1.join(); |
| |
| VERIFY( l.try_wait() ); |
| } |
| |
| void |
| test02() |
| { |
| std::latch l(3); |
| std::thread t([&] |
| { |
| l.count_down(); |
| }); |
| |
| l.arrive_and_wait(2); |
| t.join(); |
| VERIFY( l.try_wait() ); |
| } |
| |
| int main() |
| { |
| test01(); |
| test02(); |
| return 0; |
| } |