G4SimTimer.h

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef G4USERACTIONS_G4UA_G4SIMTIMER_H
#define G4USERACTIONS_G4UA_G4SIMTIMER_H
 
#include <cassert>
 
// Infrastructure includes
#include "AthenaBaseComps/AthMessaging.h"
 
// Geant4 includes
#include "G4Timer.hh"
#include "G4UserEventAction.hh"
#include <G4UserRunAction.hh>
 
// Forward declarations
class G4Event;
class G4Run;
 
namespace G4UA
{

  class G4SimTimer : public G4UserEventAction, public G4UserRunAction, public AthMessaging
  {
 
    public:

      struct Report
      {
        Report();
 
        // Total runtime
        G4Timer runtime;
        unsigned int nEvent;
        double eventTime;
        double eventTimeSquared;
        std::pair<double, double> meanAndSigma();
 
        void merge(const Report& rep){
          // only one of the report instance (the master run action) will have a valid runtime 
          if(rep.runtime.IsValid()){
            assert(!runtime.IsValid());
            runtime = rep.runtime;
          }
          nEvent += rep.nEvent;
          eventTime += rep.eventTime;
          eventTimeSquared += rep.eventTimeSquared;
        }
      };

      G4SimTimer();

      virtual void BeginOfRunAction(const G4Run* run) override final;

      virtual void EndOfRunAction(const G4Run* run) override final;

      virtual void BeginOfEventAction(const G4Event* event) override final;

      virtual void EndOfEventAction(const G4Event* event) override final;

      const Report& getReport() const
      { return m_results; }
 
    private:

      G4Timer m_eventTimer;

      Report m_results;

      bool m_firstEvent;
 
  }; // class G4SimTimer
 
} // namespace G4UA
 
#endif // G4USERACTIONS_G4UA_G4SIMTIMER_H