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 // ALLOW_RETRIES: 2 11 12 // <mutex> 13 14 // class timed_mutex; 15 16 // template <class Clock, class Duration> 17 // unique_lock(mutex_type& m, const chrono::time_point<Clock, Duration>& abs_time); 18 19 #include <mutex> 20 #include <thread> 21 #include <cstdlib> 22 #include <cassert> 23 24 #include "make_test_thread.h" 25 #include "test_macros.h" 26 27 std::timed_mutex m; 28 29 typedef std::chrono::steady_clock Clock; 30 typedef Clock::time_point time_point; 31 typedef Clock::duration duration; 32 typedef std::chrono::milliseconds ms; 33 typedef std::chrono::nanoseconds ns; 34 f1()35void f1() 36 { 37 time_point t0 = Clock::now(); 38 std::unique_lock<std::timed_mutex> lk(m, Clock::now() + ms(300)); 39 assert(lk.owns_lock() == true); 40 time_point t1 = Clock::now(); 41 ns d = t1 - t0 - ms(250); 42 assert(d < ns(50000000)); // within 50ms 43 } 44 f2()45void f2() 46 { 47 time_point t0 = Clock::now(); 48 std::unique_lock<std::timed_mutex> lk(m, Clock::now() + ms(250)); 49 assert(lk.owns_lock() == false); 50 time_point t1 = Clock::now(); 51 ns d = t1 - t0 - ms(250); 52 assert(d < ms(50)); // within 50ms 53 } 54 main(int,char **)55int main(int, char**) 56 { 57 { 58 m.lock(); 59 std::thread t = support::make_test_thread(f1); 60 std::this_thread::sleep_for(ms(250)); 61 m.unlock(); 62 t.join(); 63 } 64 { 65 m.lock(); 66 std::thread t = support::make_test_thread(f2); 67 std::this_thread::sleep_for(ms(300)); 68 m.unlock(); 69 t.join(); 70 } 71 72 return 0; 73 } 74