Timer.h

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#pragma once
 
#include <chrono>
#include <iomanip>
#include <sstream>
#include <string>
 
namespace autopas::utils {
 
using bestSteadyClock = std::conditional_t<std::chrono::high_resolution_clock::is_steady,
                                           std::chrono::high_resolution_clock, std::chrono::steady_clock>;
 
class Timer {
 public:
  Timer();
 
  virtual ~Timer();
 
  void start();
 
  long stop();
 
  void reset();
 
  void addTime(long nanoseconds);
 
  [[nodiscard]] long getTotalTime() const { return _totalTime; }
 
  static std::string getDateStamp(const std::string &format = "%Y-%m-%d_%H-%M-%S") {
    auto now = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
    std::ostringstream nowStrStr;
    tm unused;
    std::stringstream ss;
    ss << std::put_time(localtime_r(&now, &unused), format.c_str());
    return ss.str();
  }
 
 private:
  bestSteadyClock::time_point _startTime;
 
  long _totalTime = 0;
 
  bool _currentlyRunning = false;
};
}  // namespace autopas::utils