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 | //===----------------------------------------------------------------------===// |
Jonathan Roelofs | 8d86b2e | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 9 | // |
| 10 | // UNSUPPORTED: libcpp-has-no-threads |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 11 | |
| 12 | // <shared_mutex> |
| 13 | |
| 14 | // template <class Mutex> class shared_lock; |
| 15 | |
| 16 | // template <class Mutex> |
| 17 | // void swap(shared_lock<Mutex>& x, shared_lock<Mutex>& y) noexcept; |
| 18 | |
| 19 | #include <shared_mutex> |
| 20 | #include <cassert> |
| 21 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 22 | #if _LIBCPP_STD_VER > 11 |
| 23 | |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 24 | struct mutex |
| 25 | { |
| 26 | void lock_shared() {} |
| 27 | void unlock_shared() {} |
| 28 | }; |
| 29 | |
| 30 | mutex m; |
| 31 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 32 | #endif // _LIBCPP_STD_VER > 11 |
| 33 | |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 34 | int main() |
| 35 | { |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 36 | #if _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 37 | std::shared_lock<mutex> lk1(m); |
| 38 | std::shared_lock<mutex> lk2; |
| 39 | swap(lk1, lk2); |
| 40 | assert(lk1.mutex() == nullptr); |
| 41 | assert(lk1.owns_lock() == false); |
| 42 | assert(lk2.mutex() == &m); |
| 43 | assert(lk2.owns_lock() == true); |
| 44 | static_assert(noexcept(swap(lk1, lk2)), "non-member swap must be noexcept"); |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 45 | #endif // _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 46 | } |