#ifndef GRID_TIME_H
#define GRID_TIME_H
namespace Grid {
  // Dress the output; use std::chrono
#include <chrono>
#include <ctime>

typedef  std::chrono::system_clock          GridClock;
typedef  std::chrono::time_point<GridClock> GridTimePoint;
typedef  std::chrono::milliseconds          GridTime;

 
class GridStopWatch {
private:
  bool running;
  GridTimePoint start;
  GridTime accumulator;
public:
  GridStopWatch () { 
    Reset();
  }
  void     Start(void) { 
    assert(running == false);
    start = GridClock::now(); 
    running = true;
  }
  void     Stop(void)  { 
    assert(running == true);
    accumulator+= std::chrono::duration_cast<GridTime>(GridClock::now()-start); 
    running = false; 
  };
  void     Reset(void){
    running = false;
    start = GridClock::now();
    accumulator = std::chrono::duration_cast<GridTime>(start-start); 
  }
  GridTime Elapsed(void) {
    assert(running == false);
    return accumulator;
  }
};

}
#endif