| // { dg-do run } |
| // { dg-additional-options "-pthread" { target pthread } } |
| // { dg-require-effective-target c++11 } |
| // { dg-require-gthreads "" } |
| |
| // Copyright (C) 2010-2021 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/>. |
| |
| |
| #include <mutex> |
| #include <thread> |
| #include <functional> |
| #include <testsuite_hooks.h> |
| |
| void locker(std::mutex& m1, std::mutex& m2, std::mutex& m3) |
| { |
| typedef std::unique_lock<std::mutex> lock_type; |
| |
| lock_type l1(m1, std::defer_lock); |
| lock_type l2(m2, std::defer_lock); |
| lock_type l3(m3, std::defer_lock); |
| std::lock(l1, l2, l3); |
| VERIFY( l1.owns_lock() ); |
| VERIFY( l2.owns_lock() ); |
| VERIFY( l3.owns_lock() ); |
| } |
| |
| void test01() |
| { |
| std::mutex m1, m2, m3; |
| std::thread t1(locker, std::ref(m1), std::ref(m2), std::ref(m3)); |
| std::thread t2(locker, std::ref(m3), std::ref(m2), std::ref(m1)); |
| t1.join(); |
| t2.join(); |
| } |
| |
| int main() |
| { |
| test01(); |
| return 0; |
| } |