MeVis/Foundation/Sources/MLUtilities/mlRefCountedBase.h

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// **InsertLicense** code
//-------------------------------------------------------------------------

//-------------------------------------------------------------------------
#ifndef __mlRefCountedBase_H
#define __mlRefCountedBase_H

#include "mlEventSource.h"

#include <boost/intrusive_ptr.hpp>

ML_START_NAMESPACE

//----------------------------------------------------------------------
class ML_UTILS_EXPORT RefCountedBase : public EventSource
{
public:
  RefCountedBase();

  virtual void incRefCount() const;

  virtual void decRefCount() const;

  virtual bool isRefCountedBase() const { return true; } 

  static void updateReferenceCountingIfSupported(Base* oldValue, Base* newValue, bool& isRefCountedBase);

  ML_ABSTRACT_CLASS_HEADER(RefCountedBase)

protected:
  virtual ~RefCountedBase();

  mutable MLint32 _refCount;
};

inline void intrusive_ptr_add_ref(const ML_UTILS_NAMESPACE::RefCountedBase* p)
{
  p->incRefCount();
}

inline void intrusive_ptr_release(const ML_UTILS_NAMESPACE::RefCountedBase* p)
{
  p->decRefCount();
}

ML_UTILS_END_NAMESPACE

#define ML_REFCOUNTED_PTR(CLASSNAME) \
  class CLASSNAME; \
  typedef ::boost::intrusive_ptr<CLASSNAME> CLASSNAME##Ptr; \
  typedef ::boost::intrusive_ptr<const CLASSNAME> CLASSNAME##ConstPtr;

ML_START_NAMESPACE 
  ML_REFCOUNTED_PTR(RefCountedBase)
ML_END_NAMESPACE

#endif // __mlRefCountedBase_H