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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <mutex>
// template <class Mutex> class unique_lock;
// mutex_type *mutex() const;
#include <cassert>
#include <memory>
#include <mutex>
#include "checking_mutex.h"
#include "test_macros.h"
#if TEST_STD_VER >= 11
static_assert(noexcept(std::declval<std::unique_lock<checking_mutex>&>().mutex()), "");
#endif
int main(int, char**) {
checking_mutex mux;
const std::unique_lock<checking_mutex> lock0; // Make sure `mutex()` is `const`
static_assert(std::is_same<decltype(lock0.mutex()), checking_mutex*>::value, "");
assert(lock0.mutex() == nullptr);
std::unique_lock<checking_mutex> lock1(mux);
assert(lock1.mutex() == std::addressof(mux));
lock1.unlock();
assert(lock1.mutex() == std::addressof(mux));
return 0;
}
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