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 19std::mutex m; 20 21int 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