| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <shared_mutex> |
| |
| // template <class Mutex> class shared_lock; |
| |
| // bool owns_lock() const noexcept; |
| |
| #include <shared_mutex> |
| #include <cassert> |
| |
| #if _LIBCPP_STD_VER > 11 |
| |
| std::shared_mutex m; |
| |
| #endif // _LIBCPP_STD_VER > 11 |
| |
| int main() |
| { |
| #if _LIBCPP_STD_VER > 11 |
| std::shared_lock<std::shared_mutex> lk0; |
| assert(lk0.owns_lock() == false); |
| std::shared_lock<std::shared_mutex> lk1(m); |
| assert(lk1.owns_lock() == true); |
| lk1.unlock(); |
| assert(lk1.owns_lock() == false); |
| static_assert(noexcept(lk0.owns_lock()), "owns_lock must be noexcept"); |
| #endif // _LIBCPP_STD_VER > 11 |
| } |