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 // <mutex> 11 12 // template <class Mutex> class unique_lock; 13 14 // unique_lock& operator=(unique_lock const&) = delete; 15 16 #include <mutex> 17 #include <cassert> 18 19 std::mutex m0; 20 std::mutex m1; 21 main()22int main() 23 { 24 std::unique_lock<std::mutex> lk0(m0); 25 std::unique_lock<std::mutex> lk1(m1); 26 lk1 = lk0; 27 assert(lk1.mutex() == &m0); 28 assert(lk1.owns_lock() == true); 29 assert(lk0.mutex() == nullptr); 30 assert(lk0.owns_lock() == false); 31 } 32