JetTrigTimer.h

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRIGHLTJETHYPO_JETTRIGTIMER_H
#define TRIGHLTJETHYPO_JETTRIGTIMER_H
 
#include <chrono>
#include <vector>
#include <string>
#include <tuple>
 
class JetTrigTimer{
 public:
  JetTrigTimer(bool nanoseconds=false);
  
  void start();
  void update();
  std::string read() const;
  std::tuple<double, int, std::string> read_bare() const;
  void reset() noexcept;
  std::string readAndReset();
  double elapsed_to_now();
  double elapsed_to_update();
  std::string units() const;
 
 private:
  std::size_t m_nCalls{0};
  std::chrono::system_clock::time_point m_start;
  std::chrono::system_clock::time_point m_stop;
 
  double m_elapsedDelta{0.};
  bool m_nanoseconds;
  void accumulate();
 
};
#endif