| 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 | // class shared_timed_mutex; |
| 15 | |
| 16 | // template <class Clock, class Duration> |
| 17 | // shared_lock(mutex_type& m, const chrono::time_point<Clock, Duration>& abs_time); |
| 18 | |
| 19 | #include <thread> |
| 20 | |
| 21 | #include <atomic> |
| 22 | #include <chrono> |
| 23 | #include <cassert> |
| 24 | #include <cstdlib> |
| 25 | #include <shared_mutex> |
| 26 | #include <vector> |
| 27 | |
| 28 | #include "make_test_thread.h" |
| 29 | #include "test_macros.h" |
| 30 | |
| 31 | std::shared_timed_mutex m; |
| 32 | |
| 33 | typedef std::chrono::steady_clock Clock; |
| 34 | typedef Clock::time_point time_point; |
| 35 | typedef Clock::duration duration; |
| 36 | typedef std::chrono::milliseconds ms; |
| 37 | typedef std::chrono::nanoseconds ns; |
| 38 | |
| 39 | ms LongTime = ms(5000); |
| 40 | ms ShortTime = ms(50); |
| 41 | |
| 42 | static constexpr unsigned Threads = 5; |
| 43 | |
| 44 | std::atomic<unsigned> CountDown(Threads); |
| 45 | |
| 46 | void f1() |
| 47 | { |
| 48 | --CountDown; |
| 49 | time_point t0 = Clock::now(); |
| 50 | std::shared_lock<std::shared_timed_mutex> lk(m, t0 + LongTime); |
| 51 | time_point t1 = Clock::now(); |
| 52 | assert(lk.owns_lock() == true); |
| 53 | assert(t1 - t0 <= LongTime); |
| 54 | } |
| 55 | |
| 56 | void f2() |
| 57 | { |
| 58 | time_point t0 = Clock::now(); |
| 59 | std::shared_lock<std::shared_timed_mutex> lk(m, t0 + ShortTime); |
| 60 | time_point t1 = Clock::now(); |
| 61 | assert(lk.owns_lock() == false); |
| 62 | assert(t1 - t0 >= ShortTime); |
| 63 | } |
| 64 | |
| 65 | int main(int, char**) |
| 66 | { |
| 67 | { |
| 68 | m.lock(); |
| 69 | std::vector<std::thread> v; |
| 70 | for (unsigned i = 0; i < Threads; ++i) |
| 71 | v.push_back(support::make_test_thread(f1)); |
| 72 | while (CountDown > 0) |
| 73 | std::this_thread::yield(); |
| 74 | std::this_thread::sleep_for(rtime: ShortTime); |
| 75 | m.unlock(); |
| 76 | for (auto& t : v) |
| 77 | t.join(); |
| 78 | } |
| 79 | { |
| 80 | m.lock(); |
| 81 | std::vector<std::thread> v; |
| 82 | for (unsigned i = 0; i < Threads; ++i) |
| 83 | v.push_back(support::make_test_thread(f2)); |
| 84 | for (auto& t : v) |
| 85 | t.join(); |
| 86 | m.unlock(); |
| 87 | } |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 |