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 // <mutex> 13 14 // template <class Mutex> class unique_lock; 15 16 // bool owns_lock() const; 17 18 #include <mutex> 19 #include <cassert> 20 21 std::mutex m; 22 23 int main() 24 { 25 std::unique_lock<std::mutex> lk0; 26 assert(lk0.owns_lock() == false); 27 std::unique_lock<std::mutex> lk1(m); 28 assert(lk1.owns_lock() == true); 29 lk1.unlock(); 30 assert(lk1.owns_lock() == false); 31 } 32
