G4MoleculeHandleManager.hh

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// Author: Mathieu Karamitros

// The code is developed in the framework of the ESA AO7146
//
// We would be very happy hearing from you, send us your feedback! :)
//
// In order for Geant4-DNA to be maintained and still open-source,
// article citations are crucial. 
// If you use Geant4-DNA chemistry and you publish papers about your software, 
// in addition to the general paper on Geant4-DNA:
//
// Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
//
// we would be very happy if you could please also cite the following
// reference papers on chemistry:
//
// J. Comput. Phys. 274 (2014) 841-882
// Prog. Nucl. Sci. Tec. 2 (2011) 503-508 

#ifndef G4MOLECULEHANDLEMANAGER_HH
#define G4MOLECULEHANDLEMANAGER_HH

#include "globals.hh"
#include "G4ReferenceCountedHandle.hh"
#include <map>
#include <G4memory.hh>

class G4Molecule;

typedef G4shared_ptr<const G4Molecule> G4MoleculeHandle;

class G4MoleculeHandleManager
{
public:
  static G4MoleculeHandleManager* Instance();
  ~G4MoleculeHandleManager();
  G4MoleculeHandle GetMoleculeHandle(const G4Molecule*);

  static void DeleteInstance();

private:
  G4MoleculeHandleManager();
  static G4ThreadLocal G4MoleculeHandleManager* fInstance;

  struct CompMoleculePointer
  {
    G4bool operator()(const G4Molecule* mol1, const G4Molecule* mol2) const;
  };

  typedef std::map<const G4Molecule*, G4MoleculeHandle,
      G4MoleculeHandleManager::CompMoleculePointer> MoleculeHandleMap;
  MoleculeHandleMap fMoleculeHandle;
};

#endif // G4MOLECULEHANDLEMANAGER_HH