1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <mutex>
10 
11 // template <class Mutex> class unique_lock;
12 
13 // unique_lock(unique_lock const&) = delete;
14 
15 #include <mutex>
16 #include <cassert>
17 
main(int,char **)18 int main(int, char**)
19 {
20     {
21     typedef std::mutex M;
22     M m;
23     std::unique_lock<M> lk0(m);
24     std::unique_lock<M> lk = lk0;
25     assert(lk.mutex() == &m);
26     assert(lk.owns_lock() == true);
27     assert(lk0.mutex() == nullptr);
28     assert(lk0.owns_lock() == false);
29     }
30 
31   return 0;
32 }
33