From: balmacara9@aol.com (Balmacara9)
Subject: Re: task pointer
Date: 1997/10/25
Date: 1997-10-25T00:00:00+00:00 [thread overview]
Message-ID: <19971025042701.AAA00381@ladder01.news.aol.com> (raw)
In-Reply-To: 344AA999.1AB2@eelab.su.oz.au
There is probably an easier way to do this through the system programming
annex. I am much more familiar with Ada83 so this is an Ada83 type of
solution.
>task type t1; -- incomplete type declaration
>
>type t1_ptr is access t1;
>
>task type t1 is
> entry start(**acess to type t1**);
> entry a;
> entry done;
>end t1;
>
>task type t2 is
> entry a(** access to type t1 **);
> entry b;
>end t2;
>
>
>task body t1 is
> T: t2;
> Self : t1_ptr;
>begin
> accept start(**acess to type t1**);
> Self := **acess to type t1**;
>
> loop
> select
> T.a(Self);
> T.b;
> ...
> or
> accept done;
> ...
> end select;
> end loop;
>end t1;
>
>task body t2 is
> Parent: **task t1 pointer**
>begin
> loop
> select
> accept a(**task pointer**) do
> Parent := task pointer;
> end;
> ...
> *task pointer*.done;
> or
> ...
>end t2;
Starting the task would look like this;
Task1 : t1_ptr := new t1;
Task1.Start(task1);
This is ugly, but it should work. In Ada95 you may be able pass around task
ids as opposed to access types.
next prev parent reply other threads:[~1997-10-25 0:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-10-20 0:00 task pointer Paul Van Gorp
1997-10-25 0:00 ` Balmacara9 [this message]
1997-11-01 0:00 ` Matthew Heaney
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