From: emery@mitre-bedford.arpa (David Emery)
Subject: Re: Ada's (in)visibility in the engineering community
Date: 5 Oct 92 21:49:07 GMT [thread overview]
Message-ID: <EMERY.92Oct5164907@Dr_No.mitre.org> (raw)
>Now that that has been addressed, my original point is that C and (by
>inheritance) C++ are commercial real-time successes. If you doubt this
>statement, then tell me, why are you not reading this message on a computer
>whose operating system was written in Ada. While I am not a great fan of
>U*X itself, you are more likely than not, reading this message on a U*X
>system.
The "conventional" meaning of real-time is a system that must respond
to external events within (usually restrictive) timing constraints.
My workstation and text editor are not real-time in this sense,
because the only thing that happens when I don't get an adequate
response is that I get mad. Nothing goes boom or falls out of the
sky.
This is not true of things like flight simulators and airplanes,
themselves. Although most of the commercial real-time operating
systems (e.g. Lynx) are written in C or assembler, there is a large
body of real-time embedded code that is written in Ada, operating
system and all. Boeing has many commercial examples that fly now.
Furthermore, the BiiN operating system (which provided a System V
interface) was itself written in Ada, with a C binding! (It is fair
to note that BiiN was not sucessful, but my observation was that Ada
was not the cause of the problem. The problem with BiiN was lack of
marketing. Now, 5 years after its death, I'd still like to have a
system with the functionality of the BiiN system, particularly its
network object orientation.)
dave
next reply other threads:[~1992-10-05 21:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
1992-10-05 21:49 David Emery [this message]
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1992-10-06 18:32 Ada's (in)visibility in the engineering community Bob Kitzberger
1992-10-06 15:22 David Erickson
1992-10-06 7:27 mcsun!news.funet.fi!network.jyu.fi!sakkinen
1992-10-05 21:54 To ny Wen Hsun Lai
1992-10-05 19:50 Val Kartchner
1992-10-02 6:24 zaphod.mps.ohio-state.edu!cis.ohio-state.edu!news.sei.cmu.edu!ajpo.sei.cm
1992-10-01 4:11 Michael Feldman
1992-09-30 13:11 Dag Bruck
1992-09-29 14:41 fred j mccall 575-3539
1992-09-29 13:18 agate!doc.ic.ac.uk!uknet!mcsun!news.funet.fi!network.jyu.fi!sakkinen
1992-09-29 5:22 munnari.oz.au!yoyo.aarnet.edu.au!news.adelaide.edu.au!cs.adelaide.edu.au!
1992-09-28 21:23 Ed Schonberg
1992-09-25 21:04 Val Kartchner
1992-09-25 14:35 KMRODGERS
1992-09-21 1:37 pacbell.com!well!well.sf.ca.us!jcc
1992-09-21 0:54 sybus.sybus.com!myrddin!tct!psycho!f310.n3603.z1.FIDONET.ORG!Randy.Baer
1992-09-14 23:23 Pascal Obry
1992-09-14 20:34 Pascal Obry
1992-09-14 16:40 Pascal Obry
1992-09-14 16:03 fred j mccall 575-3539
1992-09-14 15:13 cis.ohio-state.edu!zaphod.mps.ohio-state.edu!caen!nigel.msen.com!yale.edu
1992-09-11 21:46 Harry Koehnemann
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