Watch.h

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#ifndef __LARCV_UTILS_WATCH_H__
#define __LARCV_UTILS_WATCH_H__

#include <sys/time.h>
#include <time.h>

namespace larcv {

  class Watch {
  public:
    Watch(){}
    ~Watch(){}

    void Start() {
      // Get current wall time
      struct timeval current_time;
      gettimeofday(&current_time,NULL);
      _wall_time_start = (double)current_time.tv_sec + (double)current_time.tv_usec * 1.e-6;
      // Get current cpu time
      _cpu_time_start = (double)(clock());
    }
    double WallTime() {
      // Get current wall time
      struct timeval current_time;
      gettimeofday(&current_time,NULL);
      double now = (double)current_time.tv_sec + (double)current_time.tv_usec * 1.e-6;
      // Return diff
      return (now - _wall_time_start);
    }
    double CPUTime() {
      // Get cpu time
      double now = (double)(clock());
      // Return diff
      return (now - _cpu_time_start)/CLOCKS_PER_SEC;
    }
  private:
    double _cpu_time_start;
    double _wall_time_start;
  };
}
#endif
 // end of doxygen group