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 // UNSUPPORTED: libcpp-has-no-threads
11 // UNSUPPORTED: c++98, c++03, c++11
12 
13 // <shared_mutex>
14 
15 // template <class Mutex> class shared_lock;
16 
17 // shared_lock& operator=(shared_lock&& u);
18 
19 #include <shared_mutex>
20 #include <cassert>
21 #include "nasty_containers.hpp"
22 
23 
main()24 int main()
25 {
26     {
27     typedef std::shared_timed_mutex M;
28     M m0;
29     M m1;
30     std::shared_lock<M> lk0(m0);
31     std::shared_lock<M> lk1(m1);
32     lk1 = std::move(lk0);
33     assert(lk1.mutex() == std::addressof(m0));
34     assert(lk1.owns_lock() == true);
35     assert(lk0.mutex() == nullptr);
36     assert(lk0.owns_lock() == false);
37     }
38     {
39     typedef nasty_mutex M;
40     M m0;
41     M m1;
42     std::shared_lock<M> lk0(m0);
43     std::shared_lock<M> lk1(m1);
44     lk1 = std::move(lk0);
45     assert(lk1.mutex() == std::addressof(m0));
46     assert(lk1.owns_lock() == true);
47     assert(lk0.mutex() == nullptr);
48     assert(lk0.owns_lock() == false);
49     }
50 }
51