[Qt-interest] Send signal from one thread to another (all threads created in one loop)

[Nicholas Shatokhin]

So, I use signal's hub, but I need signal's router.

Thu, 23 Jun 2011 17:52:10 +0300 було написано Николай Шатохин  
<n.shatokhin at gmail.com>:

> But if threads very many, it can be slow.
>
> 2011/6/23 Andrea Franceschini <therealmorpheu5 at gmail.com>:
>> 2011/6/23 Николай Шатохин <n.shatokhin at gmail.com>:
>>
>>> How to send signal from one thread to slot in
>>> another directly? I will glad if somebody shows me example of source.
>>
>> Hi Nick, I've been off Qt development for a while so my answer may be
>> missing something that happened in the latest two years :) but I think
>> your question contains the answer. In fact you could move the check on
>> the ids in the server and only send the signals to those that match.
>> This way you'd probably end up sending fewer signals and only to the
>> relevan threads.
>>
>> Another solution may be to make the server connect signals and slots
>> of the threads when they're created, but this may very well be
>> technically impossible (as I said, I've been away for two years and I
>> barely remember the basics of Qt despite having been an avid user :)
>>
>> Anyway I think the best approach here (conceptually speaking) is to go
>> through a centralized router, which is what you're doing now, except
>> if you have to exchange a lot of messages that may slow down the whole
>> thing. I say this because I myself had to do this exact thing and
>> performance weren't great at all--at least until I managed to greatly
>> reduce the number of signals emitted.
>>
>>> P.S. Sorry for my English. I'm studying now.
>>
>> Never be sorry for this as long as you are understood :)
>>
>> --
>> Andrea
>>


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