From: randhol+abuse@pvv.org (Preben Randhol)
Subject: Re: Question about Finalization Control and reference counting
Date: Thu, 26 Apr 2001 08:50:17 +0000 (UTC)
Date: 2001-04-26T08:50:17+00:00 [thread overview]
Message-ID: <slrn9efod3.13l.randhol+abuse@kiuk0156.chembio.ntnu.no> (raw)
In-Reply-To: 3AE74E17.FD004E37@boeing.com
On Wed, 25 Apr 2001 22:22:15 GMT, Jeffrey Carter wrote:
>
> Perhaps I'm trying to be too user friendly. Or maybe I'm failing. For a
> real list component, Node would not be controlled, but the list type
> would.
>
> A list component will generally not make its access type visible to its
> clients. All modification of a list will be through the operations
> provided, so freeing space when a node is deleted can be handled
> properly through those operations. You would rather want to define
> Adjust and Finalize for an entire List, to ensure that memory is managed
> properly.
Yes :-) After thinking a bit yesterday I did exactly this :-). Made the
Node types all private and added an itterator to the List so I can do:
Goto_First (List); Goto_Next (List); Goto_Previous (List); Goto_Last (List);
etc... (Prepending Goto so I don't mess with possible variable name space.)
and then I have : Get_Element (List) return Data_Type; which gives the
Data_Type (not the access value) in the Node the itterator is pointing
at at the moment.
As the Data_Type is generic it will then be up to the user to apply
Finaliaztion control on the Data_Type and then everything is ok if I
remove a Node.
Now I'll add Finalization to the List object :-)
Thanks everybody for much valued help!
--
Preben Randhol ------------------- http://www.pvv.org/~randhol/ --
�For me, Ada95 puts back the joy in programming.�
next prev parent reply other threads:[~2001-04-26 8:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-21 12:37 Question about Finalization Control and reference counting Preben Randhol
2001-04-21 12:44 ` Preben Randhol
2001-04-24 16:11 ` Jeffrey Carter
2001-04-25 15:58 ` Preben Randhol
2001-04-25 16:01 ` Preben Randhol
2001-04-25 22:22 ` Jeffrey Carter
2001-04-26 8:50 ` Preben Randhol [this message]
2001-04-25 16:57 ` Stanley R. Allen
2001-04-24 16:10 ` Alexander Boucke
2001-04-25 3:14 ` DuckE
-- strict thread matches above, loose matches on Subject: below --
2001-04-25 11:08 Christoph Grein
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