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// <shared_mutex>
13
14// template <class Mutex> class shared_lock;
15
16// void unlock();
17
18#include <cassert>
19#include <cerrno>
20#include <shared_mutex>
21#include <system_error>
22
23#include "test_macros.h"
24
25bool unlock_called = false;
26
27struct mutex
28{
29 void lock_shared() {}
30 void unlock_shared() {unlock_called = true;}
31};
32
33mutex m;
34
35int main(int, char**)
36{
37 std::shared_lock<mutex> lk(m);
38 lk.unlock();
39 assert(unlock_called == true);
40 assert(lk.owns_lock() == false);
41#ifndef TEST_HAS_NO_EXCEPTIONS
42 try
43 {
44 lk.unlock();
45 assert(false);
46 }
47 catch (std::system_error& e)
48 {
49 assert(e.code().value() == EPERM);
50 }
51#endif
52 lk.release();
53#ifndef TEST_HAS_NO_EXCEPTIONS
54 try
55 {
56 lk.unlock();
57 assert(false);
58 }
59 catch (std::system_error& e)
60 {
61 assert(e.code().value() == EPERM);
62 }
63#endif
64
65 return 0;
66}
67

source code of libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.shared/thread.lock.shared.locking/unlock.pass.cpp