// Asynchronous state machine using one CPU C++ example:
// Tested working code multitasking code: [9-4-22]

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

using namespace std::chrono;

// At the first execution of the program, capture the time as zero reference and store it to "t2".
auto t2 = high_resolution_clock::now();
auto t3 = high_resolution_clock::now();

int main()
{
  while (1)
  {
    // Always update the time reference variable "t1" to the current time:
    auto t1 = high_resolution_clock::now();

    // Always check the difference of the zero reference time with the current time and see if it is greater than the set time specified in the "if" argument:
    duration<double> time_span_1 = duration_cast<duration<double>>(t1 - t2);
    duration<double> time_span_2 = duration_cast<duration<double>>(t1 - t3);

    if(time_span_1.count() >= 1)
    {
      printf("This is function_1:\n\n");
      std::cout << time_span_1.count() << " Secs (t1-t2)\n\n";

      // Set t2 to capture the current time again as zero reference.
      t2 = high_resolution_clock::now();

      std::cout << "------------------------------------------\n\n";
    }

    else if (time_span_2.count() >= 3)
    {
      printf("This is function_2:\n\n");
      std::cout << time_span_2.count() << " Secs (t1-t3)\n\n";

      // Set t2 to capture the current time again as zero reference.
      t3 = high_resolution_clock::now();

      std::cout << "------------------------------------------\n\n";
    }
  }
  return 0;
}