1 // { dg-do run } 2 // { dg-additional-options "-pthread" { target pthread } } 3 // { dg-require-effective-target c++11 } 4 // { dg-require-gthreads "" } 5 6 // Copyright (C) 2013-2021 Free Software Foundation, Inc. 7 // 8 // This file is part of the GNU ISO C++ Library. This library is free 9 // software; you can redistribute it and/or modify it under the 10 // terms of the GNU General Public License as published by the 11 // Free Software Foundation; either version 3, or (at your option) 12 // any later version. 13 14 // This library is distributed in the hope that it will be useful, 15 // but WITHOUT ANY WARRANTY; without even the implied warranty of 16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 // GNU General Public License for more details. 18 19 // You should have received a copy of the GNU General Public License along 20 // with this library; see the file COPYING3. If not see 21 // <http://www.gnu.org/licenses/>. 22 23 #include <mutex> 24 #include <chrono> 25 #include <thread> 26 #include <testsuite_hooks.h> 27 28 // PR libstdc++/57641 29 30 namespace C = std::chrono; 31 32 // custom clock with epoch 10s before system_clock's 33 struct clock 34 { 35 typedef C::system_clock::rep rep; 36 typedef C::system_clock::period period; 37 typedef C::system_clock::duration duration; 38 typedef C::time_point<clock> time_point; 39 static constexpr bool is_steady = C::system_clock::is_steady; 40 41 static time_point nowclock42 now() 43 { 44 auto sys_time = C::system_clock::now().time_since_epoch(); 45 return time_point(sys_time + C::seconds(10)); 46 } 47 }; 48 49 std::timed_mutex mx; 50 bool locked = false; 51 52 template <typename ClockType> f()53void f() 54 { 55 locked = mx.try_lock_until(ClockType::now() + C::milliseconds(1)); 56 } 57 58 template <typename ClockType> test()59void test() 60 { 61 std::lock_guard<std::timed_mutex> l(mx); 62 auto start = ClockType::now(); 63 std::thread t(f<ClockType>); 64 t.join(); 65 auto stop = ClockType::now(); 66 VERIFY( (stop - start) < C::seconds(9) ); 67 VERIFY( !locked ); 68 } 69 main()70int main() 71 { 72 test<C::system_clock>(); 73 test<C::steady_clock>(); 74 } 75