Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!ogicse!emory!mephisto!python!hsu
From: hsu@python.gatech.edu (Yung-Kao Hsu)
Newsgroups: comp.lang.smalltalk
Subject: Re: Anyway to run a program directly from smalltalk?
Message-ID: <19572@mephisto.UUCP>
Date: 23 Feb 90 03:35:32 GMT
References: <19566@mephisto.UUCP> <7709@netcom.UUCP>
Sender: news@mephisto.UUCP
Reply-To: hsu@cobra.gatech.edu (Yung-Kao Hsu)
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Organization: ICS, Georgia Tech.
Lines: 38


In article <7709@netcom.UUCP> schang@netcom.UUCP (Sehyo Chang) writes:
>In article <19566@mephisto.UUCP> hsu@boa.gatech.edu (Yung-Kao Hsu) writes:
*>
*>The problem could be greatly reduced if somehow I could build
*>an object that could run a "prolog" or any other process directly
*>by sending a message to it. Has anyone here known of such thing?
*>
*>----
>Thre are 3 possible solution to this problem:
>(1) write class called 'prolog' or something that will manage all i/o
>interface to the rest of smalltalk.  It will use 'execv' call to automatically
>invoke prolog agent if necessary.

Even though the problem was solved following Tim's suggestion, but
your suggestion here sounds interesting. What is the basis for writing
this `prolog' class and where does this method `execv' come from?

>Also, unix socket mechanism is very efficent and shouldn't take 3 minutes,
>unless you are doing some kind of synchrous communication. You might want
>to fork off prolog-communication as lower prority process and try to do
>asynchrous communication much as possible which might yield better performance

The slow response probably has something to do with Georgia Tech's
recent upgrade of systems than socket's own performance. I had used
socket interfacing a yacc program before I wrote my own parser and
the response was reasonable even with synchronizations. However, the
use of CShellPort is better than socket IMO.


>Sehyo Chang						schang@netcom.uucp

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