:github_url: https://github.com/srbhp/nrgplusplus


.. _program_listing_file_utils_timer.hpp:

Program Listing for File timer.hpp
==================================

|exhale_lsh| :ref:`Return to documentation for file <file_utils_timer.hpp>` (``utils/timer.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   #include <chrono>
   #include <iostream>
   #include <string>
   #include <thread>
   class timer { // NOLINT
   public:
     explicit timer(const std::string &name = std::string("main"))
         : fn_name(name) {
       std::cout << "Starting " << name << std::endl;
       reset();
     }
     void reset() { start = std::chrono::high_resolution_clock::now(); }
     ~timer() {
       std::cout << "Elapsed time for " << fn_name << " : " << getDuration()
                 << "sec" << std::endl;
     }
     double getDuration() {
       // Get the duration in second
       end = std::chrono::high_resolution_clock::now();
       double time_span =
           std::chrono::duration_cast<std::chrono::duration<double>>(end - start)
               .count();
       return time_span;
     }
   
   private:
     std::string                                    fn_name;
     std::chrono::high_resolution_clock::time_point start;
     std::chrono::high_resolution_clock::time_point end;
   };