Timer.h

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#ifndef _MADARA_UTILITY_TIMER_H_
#define _MADARA_UTILITY_TIMER_H_

#include <chrono>
#include "IntTypes.h"

namespace madara
{
  namespace utility
  {
    template <typename CLOCK=std::chrono::steady_clock>
    class Timer
    {
    public:
      inline void start (void)
      {
        start_ = CLOCK::now ();
      }

      inline void stop (void)
      {
        end_ = CLOCK::now ();
      }

      inline uint64_t duration_ns (void) const
      {
        auto dur = std::chrono::duration_cast<std::chrono::nanoseconds> (
          end_ - start_);

        return (uint64_t) dur.count ();
      }

      inline uint64_t duration_s (void) const
      {
        auto dur = std::chrono::duration_cast<std::chrono::seconds> (
          end_ - start_);

        return (uint64_t) dur.count ();
      }

      inline double duration_ds (void) const
      {
        auto dur = std::chrono::duration_cast<std::chrono::duration <double>> (
          end_ - start_);

        return (double) dur.count ();
      }

      template <typename PERIOD=std::chrono::nanoseconds>
      inline uint64_t duration (void) const
      {
        auto dur = std::chrono::duration_cast<PERIOD> (
          end_ - start_);

        return (uint64_t) dur.count ();
      }


    private:
      std::chrono::time_point<CLOCK> start_;

      std::chrono::time_point<CLOCK> end_;
    };
  }
}

#endif // _MADARA_UTILITY_TIMER_H_