Re: Weird controlled behavior - Gnat 3.15p NT

[Jano <nono@celes.unizar.es>]

Jano dice...
> Patrice Freydiere dice...
> > On Thu, 04 Sep 2003 08:25:41 +0000, Jano wrote:
> > 
> > > Hello,
> > > 
> > > see the following type declarations and lines of code:
> > > 
> > >    type Object is abstract new 
> > >       Finalization.Controlled with null record;
> > >    type Object_access is access all Object'Class;
> > > 
> > >    procedure Initialize (This : in out Object) is
> > >    begin
> > >       Trace.Log ("====>");      
> > >    end Initialize;
> > > 
> > >    procedure Finalize   (This : in out Object) is
> > >    begin
> > >       Trace.Log ("<====");
> > >    end Finalize;
> > > 
> > >    declare
> > >       -- THIS LINE IS THE RELEVANT ONE.
> > >       Thing : Object_access := 
> > >          new Object'Class'(Object'Class'Input (Stream));
> > >    begin
> > >       null;
> > >    end;
> > > 
> > > Ok, running normally or stepping with GVD when the line with the
> > > stream reading is executed I get the following log:
> > > 
> > > ====>
> > > <====
> > > <====
> > > <====
> > > 
> > > Compiled with -O2 and without it if that means something. Consistently
> > > with each object in the stream.
> > > 
> > > Now, I would assume that no Finalization could happen without a
> > > corresponding Initialization, so is this normal? Is something wrong in
> > > that read way?
> > > 
> > > Regards,
> > > 
> > > A. Mosteo.
> > 
> > 
> > is it related to assign ?? 
> > can you log assign call , for the controlled type ?? 
> 
> Assign isn't overloaded, but I'll try it to see what happens.

Well, the sequence with Assign traced is:

====> (Initialize)
=***= (Adjust)
<==== (Finalize)
=***=
=***=
<====
<====

and that for each read item.

-- 
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Jano
402450.at.cepsz.unizar.es
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