[Boost-users] boost version of qt signals (including cross-thread event generation)

Subject: [Boost-users] boost version of qt signals (including cross-thread event generation)
From: Daniel Oberhoff (daniel_at_[hidden])
Date: 2011-09-14 05:49:57

Hi,

I am currently building a software component that does stream 
processing in a dataflow like scheme (i.e. data flows through a network 
of algorithm blocks, much like in simulink, if you know matlab). I am 
currently implementing it all using qt signals and slots, since this 
allows me to push parts off to different threads, and qt magically 
handles the event generation. i.e. when I connect across threads 
instead of directly invoking the slot qt will generate an event in the 
receivers thread's eventloop (such eventloops are automatically 
generated for all QThreads).

Now I am a bit frutrated by the hackishnes of the qt preprocessor (moc) 
that implements the signal/slot magic, as it does not compute with 
templates and typedefs, making my code unneccesarily verbose. So I was 
wondering how easy/hard it would be to implement such a thing with 
boost? I nknow there is signals2, but that does not implement the 
message passing scheme I want, instead it just savely calls slot 
directly. In terms of event-loops there is boost asio, right? Is there 
a sane way to combine these? It would be great as I think this kind of 
scheme can be used in many places.

Best

Daniel