/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/xAODRootAccess/xAODRootAccess/tools/THolder.h

// Dear emacs, this is -*- c++ -*-
// $Id: THolder.h 725531 2016-02-22 16:14:25Z krasznaa $
#ifndef XAODROOTACCESS_TOOLS_THOLDER_H
#define XAODROOTACCESS_TOOLS_THOLDER_H

// STL include(s):
#include <map>

// ROOT include(s):
#include <Rtypes.h>

// Forward declaration(s):
namespace std {
   class type_info;
}
class TClass;

namespace xAOD {

   class THolder {

   public:
      THolder();
      THolder( void* object, ::TClass* type, ::Bool_t owner = kTRUE );
      THolder( void* object, const std::type_info& type,
               ::Bool_t owner = kTRUE );
      THolder( const THolder& parent );
      THolder( THolder&& parent );
      virtual ~THolder();

      THolder& operator=( const THolder& rhs );
      THolder& operator=( THolder&& rhs );

      void* get() const;
      void** getPtr();

      virtual void set( void* obj );

      ::Bool_t isOwner() const;
      void setOwner( ::Bool_t state = kTRUE );

      virtual void* getAs( const std::type_info& tid,
                           ::Bool_t silent = kFALSE ) const;
      virtual const void* getAsConst( const std::type_info& tid,
                                      ::Bool_t silent = kFALSE ) const;

      ::TClass* getClass() const;
      const std::type_info* getTypeInfo() const;

      void renew();

   protected:
      void deleteObject();

      void* m_object;
      ::TClass* m_type;
      const std::type_info* m_typeInfo;
      ::Bool_t m_owner;

      typedef std::map< const std::type_info*, TClass* > TypeCache_t;
      static TypeCache_t s_typeMap;

      typedef std::map< void*, int > SharedCount_t;
      static SharedCount_t s_sharedCount;

   }; // class THolder

} // namespace xAOD

#endif // XAODROOTACCESS_TOOLS_THOLDER_H

---