[Qt-interest] Signal/Slot model is suitable for GUI applications but it isn't for console applications

[Atlant Schmidt]

Eirik:

> I think it is safe to say that for inter-thread communication, queued
> signals/slots are your only option while keeping processing in the
> individual threads.

  Perhaps I'm misunderstanding what you're saying here.

  There are plenty of alternatives besides signals/slots
  for inter-thread communication. One can use any of the
  various IPC mechanisms, especially shared memory and
  mutexes.

  Signals/slots "are your only option" only if you've
  decided to use signals/slots ;-).

                           Atlant

-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Eirik Ulvik
Sent: Monday, August 23, 2010 8:55 AM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] Signal/Slot model is suitable for GUI applications but it isn't for console applications

I think it is safe to say that for inter-thread communication, queued
signals/slots are your only option while keeping processing in the
individual threads.
For signal/slot performance there is something in the docs:
http://doc.qt.nokia.com/4.6/templates.html in the chapter "Calling
Performance is Not Everything". However I would never emit a signal in a
tight for-loop or in compute intensive code. In my application I use
signals and slots for syncronisations between threads and such.

Regards,
Eirik

Den 23.08.2010 14:45, skrev Valeriy Portnyagin:
> hi all,
>
> Could i say that Signal/Slot model is suitable for GUI applications but
> it isn't  for console applications?
> I am developing a console application with many threads. I am using the
> signals and slots between the threads.
> How much performance of my application will be worse at usage of
> Signal/Slot model?
>
> regards,
> Valery Portnyagin.
>
>
>
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> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest


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