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// <mutex>
10
11// template <class Mutex> class unique_lock;
12
13// mutex_type* release() noexcept;
14
15#include <cassert>
16#include <memory>
17#include <mutex>
18
19#include "checking_mutex.h"
20#include "test_macros.h"
21
22#if TEST_STD_VER >= 11
23static_assert(noexcept(std::declval<std::unique_lock<checking_mutex>&>().release()), "");
24#endif
25
26int main(int, char**) {
27 checking_mutex mux;
28 std::unique_lock<checking_mutex> lock(mux);
29 assert(lock.mutex() == std::addressof(mux));
30 assert(lock.owns_lock());
31
32 assert(mux.current_state == checking_mutex::locked_via_lock);
33
34 assert(lock.release() == std::addressof(mux));
35 assert(lock.mutex() == nullptr);
36 assert(!lock.owns_lock());
37 assert(mux.last_try == checking_mutex::locked_via_lock);
38 assert(mux.current_state == checking_mutex::locked_via_lock);
39 mux.unlock();
40
41 return 0;
42}
43

source code of libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.mod/release.pass.cpp