| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: no-threads |
| // UNSUPPORTED: c++03 |
| |
| // Test the interoperation of std::lock_guard with std::mutex, since that is such |
| // a common use case. |
| |
| #include <cassert> |
| #include <mutex> |
| #include <type_traits> |
| #include <functional> |
| |
| #include "make_test_thread.h" |
| #include "test_macros.h" |
| |
| void do_try_lock(std::mutex& m) { assert(m.try_lock() == false); } |
| |
| int main(int, char**) { |
| { |
| std::mutex m; |
| { |
| std::lock_guard<std::mutex> lg(m); |
| std::thread t = support::make_test_thread(do_try_lock, std::ref(m)); |
| t.join(); |
| } |
| |
| // This should work because the lock_guard unlocked the mutex when it was destroyed above. |
| m.lock(); |
| m.unlock(); |
| } |
| |
| // Test CTAD |
| #if TEST_STD_VER >= 17 |
| { |
| std::mutex m; |
| std::lock_guard lg(m); |
| static_assert(std::is_same<decltype(lg), std::lock_guard<std::mutex>>::value, ""); |
| } |
| #endif |
| |
| return 0; |
| } |