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(mutex_type& m, adopt_lock_t);
15 
16 #include <mutex>
17 #include <cassert>
18 
main()19 int main()
20 {
21     std::mutex m;
22     m.lock();
23     std::unique_lock<std::mutex> lk(m, std::adopt_lock);
24     assert(lk.mutex() == &m);
25     assert(lk.owns_lock() == true);
26 }
27