Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame^] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // <shared_mutex> |
| 11 | |
| 12 | // template <class Mutex> class shared_lock; |
| 13 | |
| 14 | // explicit operator bool() const noexcept; |
| 15 | |
| 16 | #include <shared_mutex> |
| 17 | #include <cassert> |
| 18 | |
| 19 | #if _LIBCPP_STD_VER > 11 |
| 20 | |
| 21 | std::shared_mutex m; |
| 22 | |
| 23 | #endif // _LIBCPP_STD_VER > 11 |
| 24 | |
| 25 | int main() |
| 26 | { |
| 27 | #if _LIBCPP_STD_VER > 11 |
| 28 | std::shared_lock<std::shared_mutex> lk0; |
| 29 | assert(static_cast<bool>(lk0) == false); |
| 30 | std::shared_lock<std::shared_mutex> lk1(m); |
| 31 | assert(static_cast<bool>(lk1) == true); |
| 32 | lk1.unlock(); |
| 33 | assert(static_cast<bool>(lk1) == false); |
| 34 | static_assert(noexcept(static_cast<bool>(lk0)), "explicit operator bool() must be noexcept"); |
| 35 | #endif // _LIBCPP_STD_VER > 11 |
| 36 | } |