From: Stephen Leake <Stephen.Leake@gsfc.nasa.gov>
Subject: Re: Icon Co-Expressions in Ada
Date: 1998/12/16
Date: 1998-12-16T00:00:00+00:00 [thread overview]
Message-ID: <uzp8n69k2.fsf@gsfc.nasa.gov> (raw)
In-Reply-To: Pine.A41.3.96-heb-2.07.981216194156.29486C-100000@pluto.mscc.huji.ac.il
Ehud Lamm <mslamm@mscc.huji.ac.il> writes:
> I am thinking about implimenting Goal Directed Evaluation ala Icon, as an
> Ada package. I considred two options:
> 1. Using "static" data (that is, variables stored in the package's body,
> in Ada) to impliment the suspend mechanism. This has its obvious problems.
Since I don't know anything about Icon, can you explain what "the
suspend mechanism" does?
> 2. Using Ada's tasking facilites. This has the disadvantage of making the
> user use tasks. It is sad, since as far as I know you can't simply make an
> Ada procedure behave in a task like way, by invking other procedures. The
> task must be explicit.
If "suspend" has its usual English meaning, the user should be using
tasks; one task is suspended while another is running.
An Ada procedure can call task entries, and task entry bodies can call
procedures. Not clear what else you need.
-- Stephe
next prev parent reply other threads:[~1998-12-16 0:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-12-16 0:00 Icon Co-Expressions in Ada Ehud Lamm
1998-12-16 0:00 ` dennison
1998-12-16 0:00 ` Stephen Leake [this message]
1998-12-16 0:00 ` Al Christians
1998-12-17 0:00 ` Mats Weber
1998-12-17 0:00 ` Ehud Lamm
1998-12-17 0:00 ` Ehud Lamm
1998-12-17 0:00 ` Mats Weber
1998-12-17 0:00 ` Chris Morgan
1998-12-17 0:00 ` Ehud Lamm
1998-12-17 0:00 ` Stephen Leake
1998-12-17 0:00 ` Ehud Lamm
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