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 // void unlock(); 17 18 #include <shared_mutex> 19 #include <cassert> 20 21 #if _LIBCPP_STD_VER > 11 22 23 bool unlock_called = false; 24 25 struct mutex 26 { 27 void lock_shared() {} 28 void unlock_shared() {unlock_called = true;} 29 }; 30 31 mutex m; 32 33 #endif // _LIBCPP_STD_VER > 11 34 35 int main() 36 { 37 #if _LIBCPP_STD_VER > 11 38 std::shared_lock<mutex> lk(m); 39 lk.unlock(); 40 assert(unlock_called == true); 41 assert(lk.owns_lock() == false); 42 try 43 { 44 lk.unlock(); 45 assert(false); 46 } 47 catch (std::system_error& e) 48 { 49 assert(e.code().value() == EPERM); 50 } 51 lk.release(); 52 try 53 { 54 lk.unlock(); 55 assert(false); 56 } 57 catch (std::system_error& e) 58 { 59 assert(e.code().value() == EPERM); 60 } 61 #endif // _LIBCPP_STD_VER > 11 62 } 63
