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From: gordon@mead.UUCP (Gordon Edwards)
Newsgroups: comp.lang.c++
Subject: Re: discrete-event simulation in C++
Message-ID: <1208@meaddata.mead.UUCP>
Date: 23 Aug 90 13:25:43 GMT
References: <2533@ryn.esg.dec.com> <5606@abaa.UUCP> <1990Aug22.171319.12499@ida.liu.se>
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Organization: Mead Data Central, Dayton OH
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To the person who originally started this thread.

In article <1990Aug22.171319.12499@ida.liu.se>, mip@IDA.LiU.SE (Mikael
Patel) writes:
|> 
|> Discrete event simulation should be done in SIMULA, the grandfather of
|> object-oriented programming languages. What you need is classes and
|> COROUTINES to make life easy for you! C++ has only classes. Try looking
|> at DEMOS. Its a nice simulation package written in Simula-67 that is very
|> easy to use and generates all the statistics you need without you
|> having to implement random functions, histograms, etc. There is a text
|> book; G.M. Birtwistle, Discrete Event Modelling on Simula, Macmillan, 
|> 1979, ISBN 0-333-23881-8. Simula compilers for most modern machines
|> (workstations, pc, macintosh, etc) are available.
|> 

First, remember that there is three (at least) different flavors of the 
discrete-event simulation.  You do not need coroutines if you are using the 
event-scheduling or activity-scanning paradigms.  AT&T provides a task library 
that will allow you to perform the necessary tasking operations for the 
process-interaction paradigm.

I have used C++ for event-scheduling simulations, and have found it to be
quite flexible.  Process-interaction simulations are currently very popular,
however, they allow the introduction of artifactual deadlock.  Depending on 
your level of experience with discrete-event simulations, you might want to
stick to the event-scheduling paradigm (concentrates on the events).

--
Gordon Edwards                                    Mead Data Central, Dayton OH