| 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 | // template <class Clock, class Duration> |
| 17 | // bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time); |
| 18 | |
| 19 | #include <cassert> |
| 20 | #include <chrono> |
| 21 | #include <mutex> |
| 22 | #include <shared_mutex> |
| 23 | #include <system_error> |
| 24 | |
| 25 | #include "test_macros.h" |
| 26 | |
| 27 | bool try_lock_until_called = false; |
| 28 | |
| 29 | struct mutex |
| 30 | { |
| 31 | template <class Clock, class Duration> |
| 32 | bool try_lock_shared_until(const std::chrono::time_point<Clock, Duration>& abs_time) |
| 33 | { |
| 34 | typedef std::chrono::milliseconds ms; |
| 35 | assert(Clock::now() - abs_time < ms(5)); |
| 36 | try_lock_until_called = !try_lock_until_called; |
| 37 | return try_lock_until_called; |
| 38 | } |
| 39 | void unlock_shared() {} |
| 40 | }; |
| 41 | |
| 42 | mutex m; |
| 43 | |
| 44 | int main(int, char**) |
| 45 | { |
| 46 | typedef std::chrono::steady_clock Clock; |
| 47 | std::shared_lock<mutex> lk(m, std::defer_lock); |
| 48 | assert(lk.try_lock_until(Clock::now()) == true); |
| 49 | assert(try_lock_until_called == true); |
| 50 | assert(lk.owns_lock() == true); |
| 51 | #ifndef TEST_HAS_NO_EXCEPTIONS |
| 52 | try |
| 53 | { |
| 54 | TEST_IGNORE_NODISCARD lk.try_lock_until(Clock::now()); |
| 55 | assert(false); |
| 56 | } |
| 57 | catch (std::system_error& e) |
| 58 | { |
| 59 | assert(e.code().value() == EDEADLK); |
| 60 | } |
| 61 | #endif |
| 62 | lk.unlock(); |
| 63 | assert(lk.try_lock_until(Clock::now()) == false); |
| 64 | assert(try_lock_until_called == false); |
| 65 | assert(lk.owns_lock() == false); |
| 66 | lk.release(); |
| 67 | #ifndef TEST_HAS_NO_EXCEPTIONS |
| 68 | try |
| 69 | { |
| 70 | TEST_IGNORE_NODISCARD lk.try_lock_until(Clock::now()); |
| 71 | assert(false); |
| 72 | } |
| 73 | catch (std::system_error& e) |
| 74 | { |
| 75 | assert(e.code().value() == EPERM); |
| 76 | } |
| 77 | #endif |
| 78 | |
| 79 | return 0; |
| 80 | } |
| 81 |