Re: a C usage I can't understand & "class variables"

[Ralf Stephan]

Jan Burse: 
> [fields] are not used anymore if they are not reached by an
> active processes anymore.

No, it's the ref count but you say this in the following then, too.

> To force reclaim of storage you can
> agressively set fields to null. So you can do:
> 
>     a.p=null
> 
> and as well:
> 
>     a.pp=null
> 
> In case that there is no a.ppp pointing to the object that was formerly
> behind a.p and a.pp the object gets automatically freeed. Otherwise
> it stays. Probably a reason that Java has GC are security considerations.
> You could spy out another application by falsely freeing storage and
> peeking into it, or you can crash another and/or your own application
> this way by poking into it.

You can't do such things under Unix.  That's why there are no application-
only virii.


ralf
-- 
http://ME.IN-berlin.de/~rws/


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