FPGATrackSimRegionMergingAlg.h

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// Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
 
#ifndef FPGATrackSim_REGIONMERGING_H
#define FPGATrackSim_REGIONMERGING_H
 
// Athena libraries
#include "AthenaBaseComps/AthReentrantAlgorithm.h"
#include "StoreGate/ReadHandleKeyArray.h"
#include "StoreGate/WriteHandleKey.h"
#include "StoreGate/StoreGateSvc.h"
 
// FPGATrackSim libraries
#include "FPGATrackSimObjects/FPGATrackSimTrackCollection.h"
#include "FPGATrackSimObjects/FPGATrackSimHitCollection.h"
#include "FPGATrackSimObjects/FPGATrackSimRoadCollection.h"
#include "FPGATrackSimAlgorithms/FPGATrackSimOverlapRemovalTool.h"
 

namespace FPGATrackSim {
    class FPGATrackSimRegionMergingAlg : public ::AthReentrantAlgorithm {
    public:
        FPGATrackSimRegionMergingAlg(const std::string& name, ISvcLocator* pSvcLocator);
        virtual ~FPGATrackSimRegionMergingAlg() = default;
 
        virtual StatusCode initialize() override final;
        virtual StatusCode execute(const EventContext& ctx) const override final;
        virtual StatusCode finalize() override final;
 
    private:
        // Gaudi Properties
        Gaudi::Property<bool> m_doOverlapRemoval {this, "doOverlapRemoval", true , "flag to enable the overlap removal"}; 
        Gaudi::Property<bool> m_useRoads {this, "useRoads", false, "If set to truth it merges roads instead of tracks (tracking is set to False)"};
 
        // Tools
        mutable ToolHandle<FPGATrackSimOverlapRemovalTool> m_overlapRemovalTool ATLAS_THREAD_SAFE{ this, "OverlapRemovalTool", "FPGATrackSimOverlapRemovalTool/FPGATrackSimOverlapRemovalTool", "Overla removal tool to run on overlapping regions" };
        
        // Handles
        SG::ReadHandleKeyArray<FPGATrackSimTrackCollection> m_FPGATrackCollectionKeys {this, "FPGATrackSimTrackCollections",{},"List of FPGA track collections from different regions"};
        SG::ReadHandleKeyArray<FPGATrackSimRoadCollection> m_FPGARoadCollectionKeys {this, "FPGATrackSimRoadCollections",{},"List of FPGA road collections from different regions"};
 
        SG::WriteHandleKey<FPGATrackSimTrackCollection> m_FinalFPGATrackCollectionKey {this, "FinalFPGATrackCollection","FPGATracks","Outgoing FPGA track collection containing tracks after region merging and OR"};
        SG::WriteHandleKey<FPGATrackSimRoadCollection> m_FinalFPGARoadkCollectionKey {this, "FinalFPGARoadCollection","FPGARoads","Outgoing FPGA road collection containing roads after region merging"};
 
        // chrono service
        ServiceHandle<IChronoStatSvc> m_chrono{this,"ChronoStatSvc","ChronoStatSvc"};
        
 
        // internal members
        StatusCode mergeTracks(const std::vector<const FPGATrackSimTrackCollection*>& inputTracksPtrs,
                               std::unique_ptr<FPGATrackSimTrackCollection>& outputTracks) const;
        StatusCode mergeRoads(const std::vector<const FPGATrackSimRoadCollection*>& inputRoads,
                              std::unique_ptr<FPGATrackSimRoadCollection>& outputRoads) const;
 
        mutable std::atomic<size_t> m_allIncomingTracks{0}, m_nPreORTracks{0}, m_nPostORTracks{0};
    };
}
 
#endif