CGI/exercise2/include/timer.h

#pragma once

#include <ctime>
#include <iostream>
#include <ratio>
#include <chrono>

typedef std::chrono::duration<int, std::milli> milliseconds_type;

class Counter
{
  private:
    int max;
    int n;
    std::chrono::system_clock::time_point last_time;
    milliseconds_type update_interval;

  public:
    Counter(int max, float interval)
        : max(max), update_interval((int)(interval * 1000.0f))
    {
        last_time = std::chrono::high_resolution_clock::now();
        n = 0;
    }

    ~Counter() {}

    int get_counter()
    {
        auto new_time = std::chrono::high_resolution_clock::now();
        milliseconds_type time_difference = std::chrono::duration_cast<milliseconds_type>(new_time - last_time);

        if (time_difference.count() >= update_interval.count())
        {
            last_time += update_interval;

            n++;

            if (n >= max)
            {
                n = n - max;
                abort();
            }
        }

        return n;
    }
};