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| Re: importing an actor reference [message #984579 is a reply to message #983337] |
Wed, 14 November 2012 15:33  |
Eclipse User |
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Hi Tim,
i know this feature from OT. In eTrice we currently do not support dynamical structure (import/deport of optional/plugIn Actors). Currently we generate all connections statically. For C we will completely abstain from using dynamical structure due to footprint of the runtime and the generated code. For C we focus on small systems. Additionally you can easily work around this missing feature if it is realy necessary (active routing).
For C++ and Java we will implement dynamical structure but we have a lot of work to do before we can start with that.
From my experiences in OT you did not know the order of instanciation of the actors.
Additionally it was not possible to send a message to an actor that was not instanciated.
With this constraints it was not possible to send messages from the initial transition without controlling the order of instanciation. I often used the dynamical actors just to solve this problem.
In eTrice this problem does not exist. You can be sure that a message you sent from an initial transition (without knowing the order of actor instanciation) will be delivered. This is because of the order, we start up the system. We make sure that the MessageService exists, before the actors will be instanciated. But starting the MessageService (delivering Messages) takes place, after instanciation of all actors.
That means, the messages will be stored in the queue until the actors are able to receive them. => in C you have to configure the queue, so that it is able to store all messages from the initial transitions.
You can see that in the generated SubSystemClass.
I appreciate this kind of diskussion.
I hopefully answered your question.
Regards
Thomas
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