On Monday 19 September 2011 15.55:57 Marcos Douglas wrote: > On Mon, Sep 19, 2011 at 10:49 AM, Martin Schreiber <mse00...@gmail.com> wrote: > > > Here is my doubt: I can use variables additionally to the instance > > > variable -- that is one of advantages, the parameters of some methods > > > will be interfaces -- but I can not instantiate an interface variable, > > > because I can't release it. Is that right? > > > > You can add addref()/release() methods to your CORBA interface and do > > refcounting in the implementing class if necessary. > > I understood, but that case is the same that TInterfacedObject, isn't? > TInterfacedObject with COM interface _Addref()/_Release uses compiler magic which is more magic in FPC (intermediate variables) than in Delphi. ;-) With CORBA interface and explicitly calling Addref()/Release() there is better control to define the destroying event.
> > > Resume: > > > 1- In CORBA, I only can instantiate variables of concret class, but I > > > can use interfaces variables additionally to the instance variable, of > > > course; > > > > Correct. > > > > > 2- In IUnknow, I only can instantiate variables of interfaces. > > > > In FPC correct. In Delphi it is usually possible to use COM interfaces > > with not ref counted object instances for example with TComponent. > > You're right. > So, if my code will have compatibility with Delphi, is better to use > CORBA interfaces and no reference counted if I compile it on Delhi. Is > this the best way? > So it is done in MSEgui. Or use COM interfaces and *never* explicitly destroy an implementing object instance. BTW newer Delphi have CORBA interfaces too AFAIK. Martin _______________________________________________ MSEide-MSEgui-talk mailing list MSEide-MSEgui-talk@lists.berlios.de https://lists.berlios.de/mailman/listinfo/mseide-msegui-talk
