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[Caml-list] OCam'OLE pre-release
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Date: 2002-08-07 (08:56)
From: Nicolas Cannasse <warplayer@f...>
Subject: Re: [Caml-list] OCam'OLE pre-release
> > > Because the COM object can still be referenced from C.  You probably
> > > forgot to do an AddRef somewhere, e.g. when extracting a COM object
> > > reference from its Caml wrapper.
> > >
> > > Reference count management sure is tricky...
> >
> > True.
> > If you're using OCamole to manipulate COM objects and then passing them
> back
> > to C, your C code need to call AddRef on the retreived COM object since
> > OCamole GC'ed process does not respect the COM spec (caller is
> > from Release, callee call AddRef )
> >
> > Simply use the following function :
> >
> > IUnknown *get_com_object( value v ) {
> >     IUnknown *o = IUnknown_val(v);
> >     o->AddRef();
> >     return o;
> > }
> >
> > Nicolas Cannasse
> >
> I'd want to remind that original subject was 'olegen' application. Being
> compiled natively it _does not work_. The error is access violation,
> by "The object invoked has disconnected from its clients". I believe this
> because of Released COM object is invoked from _another COM object_. In my
> first post on this topic I had conjectured this was design flaw - binding
> Release with finalize. The main reason was:  _one cannot guarantee_ that
> there are not other references to COM object from another COM objects. May
> be one can suppose, but cannot guarantee. If I'm wrong, we must follow X.
> Leroy and try to find the error in ocamole.cpp. If I'm wrong again, why
> olegen not work???

Sorry but I didn't get this in your previous emails.
I'm currently investigating the native compilation issues.
Please consider that only bytecode compilation is available in the .pre
If you're experiencing any problem/bug with OCamole and/or OLEGen, please
send me a report in order to fix it.

Nicolas Cannasse

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