20 General utilities library [utilities]

20.12 Time utilities [time]

20.12.7 Clocks [time.clock] Class steady_clock [time.clock.steady]

Objects of class steady_clock represent clocks for which values of time_point never decrease as physical time advances and for which values of time_point advance at a steady rate relative to real time. That is, the clock may not be adjusted.

class steady_clock {
  typedef unspecified                               rep;
  typedef ratio<unspecified, unspecified>          period;
  typedef chrono::duration<rep, period>              duration;
  typedef chrono::time_point<unspecified, duration>  time_point;
  static constexpr bool is_steady =               true;

  static time_point now() noexcept;