Re: Spawning a subprocess and communicating with it.

["Condic, Marin D." <condicma@PWFL.COM>]

John McCabe <john@ASSEN.DEMON.CO.UK> writes:
>As a matter of interest, should it not be possible to do interprocess
>communication using the RPC stuff defined in the Distributed Systems
>Annexe?
>
>Does anyone fully support that yet?

I took a look at the Distributed Systems Annex and it didn't seem to do what
I wanted to do. From as best I could figure (not really being a distributed
computing kind of guy - at least not in the sense most people would mean)
this looked like it was spelling out ways of sharing memory between two
processes and of supporting "dynamic link libraries" (or whatever the term
would be for the given OS) which might reside on a separate processor. I
suppose this would be fine if all I wanted was to distribute the workload of
one program across several machines. My problem is that I really have two
separate programs which both run independently and the one program needs to
interrogate the other program periodically concerning its state. (One of the
programs simulates the embedded computer application on a workstation or PC
- the other is a monitor program that would normally run on the workstation
and interrogate the embedded computer.)

As far as support for the annex, I vaguely recall somebody making mention of
it being available in GNAT, but I certainly couldn't attest to that
personally. I'm sure Robert Dewar could fill us in on this one.

MDC

Marin D. Condic
Real Time & Embedded Systems
United Technologies, Pratt & Whitney
Government Engines & Space Propulsion
M/S 731-95, P.O.B. 109600, West Palm Beach, FL, 33410-9600
Ph: 561.796.8997         Fx: 561.796.4669

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