38 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// <mutex>10 11// template <class Mutex> class unique_lock;12 13// bool owns_lock() const;14 15#include <cassert>16#include <mutex>17 18#include "checking_mutex.h"19#include "test_macros.h"20 21#if TEST_STD_VER >= 1122static_assert(noexcept(std::declval<std::unique_lock<checking_mutex>&>().owns_lock()), "");23#endif24 25int main(int, char**) {26 {27 checking_mutex mux;28 const std::unique_lock<checking_mutex> lock0; // Make sure `owns_lock()` is `const`29 assert(!lock0.owns_lock());30 std::unique_lock<checking_mutex> lock1(mux);31 assert(lock1.owns_lock());32 lock1.unlock();33 assert(!lock1.owns_lock());34 }35 36 return 0;37}38