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From: Matthew Heaney <matthew_heaney@acm.org>
Subject: Re: Software landmines (loops)
Date: 1998/09/01
Message-ID: <m3d89gq0mt.fsf@mheaney.ni.net>#1/1
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NNTP-Posting-Date: Mon, 31 Aug 1998 21:47:48 PDT
Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.lang.ada
Date: 1998-09-01T00:00:00+00:00
List-Id: <comp.lang.ada>

eachus@spectre.mitre.org (Robert I. Eachus) writes:

>    Finalization did end up in Ada 95, and it is the right solution to
> this particular problem.  If you want the file to be closed when all
> references go away, it is easy enough to put the code in one place,
> and write:
> 
>    (elsewhere):
> 
>    type File_Handle is new Controlled with private...
> 
>    Now you can say:
> 
>    procedure ... is
>      FH: File_Handle;
>    begin
>      ...
>     end ...;
> 
>     And be sure that the file will be closed if necessary, but only when
> the file is open and no other reference to it exists.
> 
>     Of course, no one does this, because most compiler vendors "do the
> right thing" for the standard I/O packages.  (This wasn't always the
> case.)

I made a similar suggestion wrt the use of a semaphore.  

I guess great minds think alike, eh, Bob?

Matt