Re: (Newbie) intertask communication

["Mark Lundquist" <mark@rational.com>]

Pieter Thysebaert <pieter.thysebaert@pandora.be> wrote in message
news:q9nz6.15400$ii5.1263786@afrodite.telenet-ops.be...
> Hi....
>
> I'm trying to have two tasks interact (using entry/accept).
> In fact we have this assignment where we are supposed to (not in reality)
> monitor some patient's heartbeat.
>
>
[example snipped...]

OK, this post was a prime example of the right way to ask for help with a
homework assignment!  Thanks, Pieter!

> How would I pass the "name" of a task to antoher task to have it use that
> one ?
> And how can I save a "reference"to a task  ?

Use an access type designating a task type.  This can be used for any formal
parameter (to a "callable entity", i.e. subprogram or entry, or to a
generic), and of course you can declare a variable of this type in your
Patient task and assign to it, to save your reference to the other task.  So
for example:

    task type Monitor is
        .
        .

    type Access_Monitor is access all Monitor;
    .
    .

    Monitor_1 : aliased Monitor;

    Patient_1.Start  (Monitor_1'Access);


Also, a task type can have discriminants.  So you can do this:

    task type Patient (Associated_Monitor : Access_Monitor)

For that matter, it can be an "access discriminant" (then you no longer need
the access type, and you get a built-in null check):

    task type Patient (Associated_Monitor : access Monitor);

Hope this helps,
-- mark