Re: [Boost-users] Mixing signals2 and asio mechanism failing

Subject: Re: [Boost-users] Mixing signals2 and asio mechanism failing
From: Frank Mori Hess (fmh6jj_at_[hidden])
Date: 2013-10-20 13:34:17

On Sunday, October 20, 2013, ustulation wrote:
> I'd posted a query here too:
> http://stackoverflow.com/questions/19476578/mixing-boostasio-and-boostsi
> gnals2-giving-problems
> 
> In the hack there I have assumed that signals make a copy of slots
> before executing them and hence that hack would work -> it would delete
> the actual functor when connecting dummy() and then the copy once
> slot() returns (assuming that the signal had been fired and the control
> was inside slot() when stop() was called). Is that assumption correct
> (about copying the list of slots before executing them) ? I got it
> from:
> http://stackoverflow.com/a/4490785/1060004

It avoids copying the slot list unless it has to (it has to when you 
connect a slot while an invocation is in progress).  If it does have to 
copy the slot list, it will clean up all the disconnected slots from the 
new copy and discard the old copy when all invocations using it complete.  
These are implementation details though, it would be best not to rely on 
them.