stopwatch.h

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#pragma once
#include <string>
#include "../object.h"
#include "../ticks.h"
 
namespace xtd {
  namespace diagnostics {
    class stopwatch : public object{
    public:
      stopwatch() = default;
      
      stopwatch(const stopwatch&) = default;
      stopwatch& operator=(const stopwatch&) = default;
      
      static int64_t frequency();
      
      static bool is_high_resolution();
      
      std::chrono::nanoseconds elapsed() const;
      
      int64_t elapsed_milliseconds() const;
 
      int64_t elapsed_nanoseconds() const;
 
      int64_t elapsed_ticks() const;
      
      bool is_running() const;
      
      static int64_t get_timestamp();
      
      void reset();
      
      void restart();
      
      void start();
      
      static stopwatch start_new();
      
      void stop();
      
    private:
      explicit stopwatch(bool start);
      bool running_ = false;
      int64_t start_ = 0;
      int64_t stop_ = 0;
    };
  }
}