Re: [Boost-users] connect boost::signals inside of a slot

From: Setzer, Sebastian (ext) (sebastian.setzer.ext_at_[hidden])
Date: 2006-05-18 11:45:11

> > Hi,
> > If you connect (disconnect) a new slot to a signal inside 
> of a slot of
> > the same signal, what happens?
> > - are the slots called which where connected before the signal was
> > called,
> > - or is new slot be called this time, too,
> > - or is the behaviour undefined?
> >
> > I didn't find anything on this subject in the manuals. Even if the
> > behaviour is undefined, that should be mentioned.
> 
> Doesn't the following answer the questions:
Sorry. I didn't look into the "disconnect" section.

It answers a part of the questions.
It doesn't describe what happens if you connect a slot.
Is the slot not called this time (that would be simplest)?
Or is it called, but only if the slot call group of the slot isn't
"done" already?

> 
> http://www.boost.org/doc/html/signals/tutorial.html#id2732772
> 
> 
> When can disconnections occur? (Intermediate)
> ---------------------------------------------
> ...
> 
> These events can occur at any time without disrupting a 
> signal's calling 
> sequence. If a signal/slot connection is disconnected at any 
> time during a 
> signal's calling sequence, the calling sequence will still 
> continue but will 
> not invoke the disconnected slot. Additionally, a signal may 
> be destroyed 
> while it is in a calling sequence, and which case it will 
> complete its slot 
> call sequence but may not be accessed directly.
> 
> Signals may be invoked recursively (e.g., a signal A calls a 
> slot B that 
> invokes signal A...). The disconnection behavior does not 
> change in the 
> recursive case, except that the slot calling sequence 
> includes slot calls 
> for all nested invocations of the signal.
> 
> Jeff Flinn 
> 
> 
> 
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