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
10 // UNSUPPORTED: c++03, c++11
11 
12 // dylib support for shared_mutex was added in macosx10.12
13 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11}}
14 
15 // <shared_mutex>
16 
17 // template <class Mutex> class shared_lock;
18 
19 // shared_lock& operator=(shared_lock&& u);
20 
21 #include <shared_mutex>
22 #include <cassert>
23 #include "nasty_containers.h"
24 
25 #include "test_macros.h"
26 
27 
28 int main(int, char**)
29 {
30     {
31     typedef std::shared_timed_mutex M;
32     M m0;
33     M m1;
34     std::shared_lock<M> lk0(m0);
35     std::shared_lock<M> lk1(m1);
36     lk1 = std::move(lk0);
37     assert(lk1.mutex() == std::addressof(m0));
38     assert(lk1.owns_lock() == true);
39     assert(lk0.mutex() == nullptr);
40     assert(lk0.owns_lock() == false);
41     }
42     {
43     typedef nasty_mutex M;
44     M m0;
45     M m1;
46     std::shared_lock<M> lk0(m0);
47     std::shared_lock<M> lk1(m1);
48     lk1 = std::move(lk0);
49     assert(lk1.mutex() == std::addressof(m0));
50     assert(lk1.owns_lock() == true);
51     assert(lk0.mutex() == nullptr);
52     assert(lk0.owns_lock() == false);
53     }
54 
55   return 0;
56 }
57