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 // UNSUPPORTED: libcpp-has-no-threads 11 12 // <shared_mutex> 13 14 // template <class Mutex> class shared_lock; 15 16 // shared_lock(); 17 18 #include <shared_mutex> 19 #include <cassert> 20 21 int main() 22 { 23 #if _LIBCPP_STD_VER > 11 24 std::shared_lock<std::shared_timed_mutex> ul; 25 assert(!ul.owns_lock()); 26 assert(ul.mutex() == nullptr); 27 #endif // _LIBCPP_STD_VER > 11 28 } 29
