| //===----------------------------------------------------------------------===// |
| // |
| // 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: libcpp-has-no-threads |
| // UNSUPPORTED: c++98, c++03, c++11 |
| // XFAIL: dylib-has-no-shared_mutex |
| |
| // <shared_mutex> |
| |
| // template <class Mutex> class shared_lock; |
| |
| // mutex_type *mutex() const noexcept; |
| |
| #include <shared_mutex> |
| #include <cassert> |
| |
| std::shared_timed_mutex m; |
| |
| int main(int, char**) |
| { |
| std::shared_lock<std::shared_timed_mutex> lk0; |
| assert(lk0.mutex() == nullptr); |
| std::shared_lock<std::shared_timed_mutex> lk1(m); |
| assert(lk1.mutex() == &m); |
| lk1.unlock(); |
| assert(lk1.mutex() == &m); |
| static_assert(noexcept(lk0.mutex()), "mutex() must be noexcept"); |
| |
| return 0; |
| } |