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From: dennison@telepath.com
Subject: Re: Does this model work ?
Date: 1999/05/18
Message-ID: <7hs6in$g8p$1@nnrp1.deja.com>#1/1
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Date: 1999-05-18T00:00:00+00:00
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In article <7hmda1$khp$1@nnrp1.deja.com>,
  Robert Dewar <robert_dewar@my-dejanews.com> wrote:
> In article <7hhj6q$cjn$1@nnrp1.deja.com>,
>   dennison@telepath.com wrote:
> > I don't think this feat would be possible in any other
> > language.
>
> Such claims alway make me uneasy.
>
> It is perfectly possible to write code that is in practice
> close to perfectly portable in COBOL, Fortran, C, or several
> other standardized languages.

The part of my post that you snipped was talking about a program that
contained multiple intercommunicating tasks in a Rate-monotonic system
using a custom frequency-based scheduler. Are you saying that it is
possible to write perfectly portable code in COBOL, Fortran, or C that
can do that?

As near as I can puzzle it, you will need at the bare minimum support
for multiple threads of control within the language. COBOL, Fortran and
C do not have such a concept. Of the languages that can do this, to my
knowledge only Ada and Java are widely available. But I think even Java
is not available for vxWorks. Even if it were, I'm not sure Java threads
have all the features we'd need.

--
T.E.D.


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