Timer.hpp

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#ifndef MEDUSA_BITS_UTILS_TIMER_HPP_
#define MEDUSA_BITS_UTILS_TIMER_HPP_
 
#include <medusa/Config.hpp>
#include <iostream>
#include <chrono>
#include <string>
#include <vector>
 
namespace mm {
 
class Timer {
  protected:
    typedef std::chrono::steady_clock::time_point time_type;  
    std::vector<std::string> labels_;  
    std::vector<time_type> times_;  
 
    void showTimings(int from, int to, std::ostream& os = std::cout) const;
    int getID(const std::string& label) const;
    time_type timeAt(int id) const;
  public:
    void addCheckPoint(const std::string& label);
 
    void showTimings(std::ostream& os = std::cout) const;
    void showTimings(const std::string& from, const std::string& to,
                     std::ostream& os = std::cout) const;
    time_type timeAt(const std::string& label) const;
    double duration(const std::string& from, const std::string& to) const;
    double durationToNow(const std::string& from) const;
    int size() const { return labels_.size(); }
    const std::vector<std::string>& labels() const { return labels_; }
    const std::vector<time_type>& times() const { return times_; }
    void clear();
 
    friend std::ostream& operator<<(std::ostream& os, const Timer& timer) {
        timer.showTimings(os);
        return os;
    }
};
 
}  // namespace mm
 
#endif  // MEDUSA_BITS_UTILS_TIMER_HPP_