Re: PubSub

[DrPi <314@drpi.fr>]

Le 01/11/2020 à 12:18, Dmitry A. Kazakov a écrit :
> On 01/11/2020 11:36, DrPi wrote:
> 
>> What I'm looking for is not inter-task communication. It is some sort 
>> of message dispatcher (which is not thread safe). It is like a GUI 
>> event manager but for custom events.
>> A simple description here : https://wiki.wxpython.org/WxLibPubSub
> 
> You do not need that stuff. Even less if that is not task safe. On the 
> context of the same task, it is just a call. You need no marshalled 
> arguments because the call is synchronous and it must be synchronous 
> because it is the same task. The very term "event" makes no sense if the 
> task that emits it is the task that consumes it.
> 
>> This is very useful when using a GUI since it allows to directly send 
>> messages to windows/dialogs/controls.
> 
> It is not useful, it is a mess, e.g. in GTK.
> 
> Anyway, the standard Ada library contains implementation of FIFO queues. 
> If you want it 1-n rather that 1-1 use a blackboard instead of a FIFO.
> 
Thanks Dmitry. I'll have a look at it.