weakobject.h

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#ifndef CARTOBASE_SMART_WEAKOBJECT_H
#define CARTOBASE_SMART_WEAKOBJECT_H
 
 
#include <cartobase/config/cartobase_config.h>
#include <cartobase/smart/weakptr.h>
#include <map>
 
 
namespace carto
{
 
  template <typename T> class weak_shared_ptr;
 
class WeakObject
{
 
  typedef weak_ptr<WeakObject> WeakPtr;
  typedef weak_shared_ptr<WeakObject> WeakSharedPtr;
 
  public:
 
    template <typename T> void attachWeakPtr( weak_ptr<T>& ) const;
    template <typename T> void detachWeakPtr( weak_ptr<T>& ) const;
    template <typename T> void attachWeakPtr( weak_shared_ptr<T>& ) const;
    template <typename T> void detachWeakPtr( weak_shared_ptr<T>& ) const;
    virtual ~WeakObject();
 
  protected:
 
    WeakObject();
    WeakObject( const WeakObject& );
    WeakObject& operator=( const WeakObject& );
 
  private:
 
    void attachWeakPtr( WeakPtr* ) const;
    void detachWeakPtr( WeakPtr* ) const;
    void attachWeakPtr( WeakSharedPtr* ) const;
    void detachWeakPtr( WeakSharedPtr* ) const;
    void notifyObervers() const;
 
    mutable std::map<WeakPtr*, bool> observers;
 
};
 
 
template <typename T>
inline 
void WeakObject::attachWeakPtr( weak_ptr<T>& ptr ) const
{
  attachWeakPtr( reinterpret_cast<WeakPtr*>( &ptr ) );
}
 
 
template <typename T>
inline
void WeakObject::detachWeakPtr( weak_ptr<T>& ptr ) const
{
  detachWeakPtr( reinterpret_cast<WeakPtr*>( &ptr ) );
}
 
 
template <typename T>
inline
void WeakObject::attachWeakPtr( weak_shared_ptr<T>& ptr ) const
{
  attachWeakPtr( reinterpret_cast<WeakSharedPtr*>( &ptr ) );
}
 
 
template <typename T>
inline
void WeakObject::detachWeakPtr( weak_shared_ptr<T>& ptr ) const
{
  detachWeakPtr( reinterpret_cast<WeakSharedPtr*>( &ptr ) );
}
 
 
} // namespace carto
 
 
#endif