C++ Concurrency in Action, Second Edition

Appendix D. C++ Thread Library reference

D.1. The <chrono> header

The <chrono> header provides classes for representing points in time, durations, and clock classes, which act as a source of time_points. Each clock has an is_steady static data member, which indicates whether it’s a steady clock that advances at a uniform rate (and can’t be adjusted). The std::chrono::steady_clock class is the only clock guaranteed to be steady.

• Header contents

  namespace std
  {
     namespace chrono
     {
         template<typename Rep,typename Period = ratio<1>>
         class duration;
         template<
             typename Clock,
             typename Duration = typename Clock::duration>
         class time_point;
         class system_clock;
         class steady_clock;
         typedef unspecified-clock-type high_resolution_clock;
     }
  }

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