1 // { dg-do run } 2 // { dg-options "-pthread" } 3 // { dg-require-effective-target c++11 } 4 // { dg-require-effective-target pthread } 5 6 // Copyright (C) 2013-2019 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 f()52void f() 53 { 54 locked = mx.try_lock_until(clock::now() + C::milliseconds(1)); 55 } 56 main()57int main() 58 { 59 std::lock_guard<std::timed_mutex> l(mx); 60 auto start = C::system_clock::now(); 61 std::thread t(f); 62 t.join(); 63 auto stop = C::system_clock::now(); 64 VERIFY( (stop - start) < C::seconds(9) ); 65 VERIFY( !locked ); 66 } 67