1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // UNSUPPORTED: libcpp-has-no-threads 10 // UNSUPPORTED: c++03, c++11 11 12 // dylib support for shared_mutex was added in macosx10.12 13 // XFAIL: with_system_cxx_lib=macosx10.11 14 // XFAIL: with_system_cxx_lib=macosx10.10 15 // XFAIL: with_system_cxx_lib=macosx10.9 16 17 // <shared_mutex> 18 19 // template <class Mutex> class shared_lock; 20 21 // mutex_type *mutex() const noexcept; 22 23 #include <shared_mutex> 24 #include <cassert> 25 26 #include "test_macros.h" 27 28 std::shared_timed_mutex m; 29 main(int,char **)30int main(int, char**) 31 { 32 std::shared_lock<std::shared_timed_mutex> lk0; 33 assert(lk0.mutex() == nullptr); 34 std::shared_lock<std::shared_timed_mutex> lk1(m); 35 assert(lk1.mutex() == &m); 36 lk1.unlock(); 37 assert(lk1.mutex() == &m); 38 static_assert(noexcept(lk0.mutex()), "mutex() must be noexcept"); 39 40 return 0; 41 } 42