1  // -*- C++ -*-
       2  
       3  // Copyright (C) 2018-2023 Free Software Foundation, Inc.
       4  
       5  // This library is free software; you can redistribute it and/or
       6  // modify it under the terms of the GNU General Public License as
       7  // published by the Free Software Foundation; either version 3, or (at
       8  // your option) any later version.
       9  
      10  // This library is distributed in the hope that it will be useful, but
      11  // WITHOUT ANY WARRANTY; without even the implied warranty of
      12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13  // General Public License for more details.
      14  
      15  // You should have received a copy of the GNU General Public License
      16  // along with this library; see the file COPYING3.  If not see
      17  // <http://www.gnu.org/licenses/>.
      18  
      19  
      20  // A clock that ticks at a third of the speed of system_clock that can be used
      21  // to ensure that functions with timeouts don't erroneously return early.
      22  
      23  #include <chrono>
      24  
      25  namespace __gnu_test
      26  {
      27  struct slow_clock
      28  {
      29    using rep = std::chrono::system_clock::rep;
      30    using period = std::chrono::system_clock::period;
      31    using duration = std::chrono::system_clock::duration;
      32    using time_point = std::chrono::time_point<slow_clock, duration>;
      33    static constexpr bool is_steady = false;
      34  
      35    static time_point now()
      36    {
      37      auto real = std::chrono::system_clock::now();
      38      return time_point{real.time_since_epoch() / 3};
      39    }
      40  };
      41  }