ActsPropStepRootWriterSvc.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ACTSGEOMETRY_ACTSPROPSTEPROOTWRITERSVC_H
#define ACTSGEOMETRY_ACTSPROPSTEPROOTWRITERSVC_H
 
#include "AthenaBaseComps/AthService.h"
#include "GaudiKernel/IInterface.h"
#include "Gaudi/Property.h"  /*no forward decl: typedef*/
 
#include "ActsGeometry/IActsPropStepRootWriterSvc.h"
 
 
#include <vector>
#include <deque>
#include <mutex>
#include <thread>
#include <atomic>
 
template <typename T>
class RootPropStepWriter;
 
 
namespace Acts {
 
template <class>
class ExtrapolationCell;
 
}
 
class TFile;
class TTree;
 
 
class ActsPropStepRootWriterSvc : public extends<AthService, IActsPropStepRootWriterSvc> {
public:
    
  virtual StatusCode initialize() override;
  virtual StatusCode finalize() override;
    
  ActsPropStepRootWriterSvc( const std::string& name, ISvcLocator* svc );
 
  using StepVector = std::vector<Acts::detail::Step>;
 
  void
  write(const StepVector& steps) override;
 
private:
  using queue_item_t = std::pair<size_t, StepVector>;
 
  //std::shared_ptr<RootPropStepWriter<Acts::TrackParameters>> m_rootEccWriter;
  std::deque<queue_item_t> m_queue;
  std::mutex m_writeMutex;
  std::thread m_writeThread;
  std::atomic<bool> m_doEnd;
 
  void writeThread();
  void doWrite(const StepVector& steps, size_t evtNum);
  void end();
 
  // jobOptions properties
  Gaudi::Property<std::string> m_filePath{this, "FilePath", "propsteps.root", "Output root file for charged particle"};
  Gaudi::Property<std::string> m_treeName{this, "TreeName", "propsteps", ""};
  //Gaudi::Property<bool> m_writeBoundary{this, "WriteBoundary", true, ""};
  //Gaudi::Property<bool> m_writeMaterial{this, "WriteMaterial", true, ""};
  //Gaudi::Property<bool> m_writeSensitive{this, "WriteSensitive", true, ""};
  //Gaudi::Property<bool> m_writePassive{this, "WritePassive", true, ""};
 
  // root branch storage
    TFile*             m_outputFile{};    
    TTree*             m_outputTree{};    
    int m_eventNum{};
    std::vector<float> m_s_pX;   
    std::vector<float> m_s_pY;   
    std::vector<float> m_s_pZ;   
    std::vector<float> m_s_pR;   
    std::vector<int>   m_s_volumeID;    
    std::vector<int>   m_s_boundaryID;    
    std::vector<int>   m_s_layerID;     
    std::vector<int>   m_s_approachID;     
    std::vector<int>   m_s_sensitiveID;   
 
};
 
 
#endif