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 // UNSUPPORTED: no-threads, c++03
10 
11 // <mutex>
12 
13 // template <class Mutex> class unique_lock;
14 
15 // unique_lock& operator=(unique_lock&& u);
16 
17 #include <mutex>
18 #include <cassert>
19 #include "nasty_containers.h"
20 
21 #include "test_macros.h"
22 
main(int,char **)23 int main(int, char**)
24 {
25     {
26     typedef std::mutex M;
27     M m0;
28     M m1;
29     std::unique_lock<M> lk0(m0);
30     std::unique_lock<M> lk1(m1);
31     lk1 = std::move(lk0);
32     assert(lk1.mutex() == std::addressof(m0));
33     assert(lk1.owns_lock() == true);
34     assert(lk0.mutex() == nullptr);
35     assert(lk0.owns_lock() == false);
36     }
37     {
38     typedef nasty_mutex M;
39     M m0;
40     M m1;
41     std::unique_lock<M> lk0(m0);
42     std::unique_lock<M> lk1(m1);
43     lk1 = std::move(lk0);
44     assert(lk1.mutex() == std::addressof(m0));
45     assert(lk1.owns_lock() == true);
46     assert(lk0.mutex() == nullptr);
47     assert(lk0.owns_lock() == false);
48     }
49 
50   return 0;
51 }
52