Re: Musings on RxAda

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On Wed, 21 Oct 2015 09:18:12 -0700 (PDT), Hadrien Grasland wrote:

> I do believe, however, that a task which blocks or performs CPU work after
> the rendezvous is acceptable,

But it is still blocking. For a publisher/subscriber service no mediator
task is needed. Such a task would not solve any of the problems of such
service anyway.

> and could be used to achieve some
> parallelism in the context of a true data pipeline (i.e. more than 1
> input).

Pipeline is just a method of buffered exchange. As such it is blocking
(publisher) when the subscriber is unable to process all published data. 

Moreover it is unsuitable for 1-n communications. If you are OK with
blocking the publisher, then no buffering is ever needed. Buffering
(marshaling) is required by non-blocking but not ensures it.

And no mediator task is needed anyway, not even a protected object. 1-1
FIFO requires none of Ada's synchronization primitives.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de