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 
11 // <mutex>
12 
13 // template <class Mutex> class unique_lock;
14 
15 // void unlock();
16 
17 #include <mutex>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
22 bool unlock_called = false;
23 
24 struct mutex
25 {
lockmutex26     void lock() {}
unlockmutex27     void unlock() {unlock_called = true;}
28 };
29 
30 mutex m;
31 
main(int,char **)32 int main(int, char**)
33 {
34     std::unique_lock<mutex> lk(m);
35     lk.unlock();
36     assert(unlock_called == true);
37     assert(lk.owns_lock() == false);
38 #ifndef TEST_HAS_NO_EXCEPTIONS
39     try
40     {
41         lk.unlock();
42         assert(false);
43     }
44     catch (std::system_error& e)
45     {
46         assert(e.code().value() == EPERM);
47     }
48 #endif
49     lk.release();
50 #ifndef TEST_HAS_NO_EXCEPTIONS
51     try
52     {
53         lk.unlock();
54         assert(false);
55     }
56     catch (std::system_error& e)
57     {
58         assert(e.code().value() == EPERM);
59     }
60 #endif
61 
62   return 0;
63 }
64