On sexta-feira, 22 de fevereiro de 2013 15.28.44, Corentin Jabot wrote:
> 2013/2/22 André Somers <[email protected]>
>
> > If only QFuture allowed you to connect... Unfortunately, it is not a
> > QObject
>
> Oh yeah, I almost forgot that bit. And somehow it looks like the core issue.
> I wonder why by the way:
>
> We could have something like QObject <- QFutureBase (with all
> requiered signals/slots) <- QFuture<T>
> or is there something I'm not seeing ?
>
> Of course now its too late, but we could introduce something new, like
> QFutureObject ?

That's QFutureWatcher.

The fact is that any QObject that is returned from those functions -- if any
-- must belong to the calling thread. That implies the necessary guarantees in
terms of signal emissions.

For example, if the functions return a QObject pointer, a signal-signal
connection from the actual target object's finished() signal to the returned
object's finished() will apply the necessary queueing semantics.

That also speaks against returning a QThread*.

--
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center

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