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 // mutex_type *mutex() const; 15 16 #include <mutex> 17 #include <cassert> 18 19 std::mutex m; 20 21 int main() 22 { 23 std::unique_lock<std::mutex> lk0; 24 assert(lk0.mutex() == nullptr); 25 std::unique_lock<std::mutex> lk1(m); 26 assert(lk1.mutex() == &m); 27 lk1.unlock(); 28 assert(lk1.mutex() == &m); 29 } 30
