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 | // mutex_type* release() noexcept; |
| 17 | |
| 18 | #include <shared_mutex> |
| 19 | #include <cassert> |
| 20 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 21 | #if _LIBCPP_STD_VER > 11 |
| 22 | |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 23 | struct mutex |
| 24 | { |
| 25 | static int lock_count; |
| 26 | static int unlock_count; |
| 27 | void lock_shared() {++lock_count;} |
| 28 | void unlock_shared() {++unlock_count;} |
| 29 | }; |
| 30 | |
| 31 | int mutex::lock_count = 0; |
| 32 | int mutex::unlock_count = 0; |
| 33 | |
| 34 | mutex m; |
| 35 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 36 | #endif // _LIBCPP_STD_VER > 11 |
| 37 | |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 38 | int main() |
| 39 | { |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 40 | #if _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 41 | std::shared_lock<mutex> lk(m); |
| 42 | assert(lk.mutex() == &m); |
| 43 | assert(lk.owns_lock() == true); |
| 44 | assert(mutex::lock_count == 1); |
| 45 | assert(mutex::unlock_count == 0); |
| 46 | assert(lk.release() == &m); |
| 47 | assert(lk.mutex() == nullptr); |
| 48 | assert(lk.owns_lock() == false); |
| 49 | assert(mutex::lock_count == 1); |
| 50 | assert(mutex::unlock_count == 0); |
| 51 | static_assert(noexcept(lk.release()), "release must be noexcept"); |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 52 | #endif // _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 53 | } |