[Twisted-Python] locking threads when deferToThread is used

Marian Schubert marian.schubert at gmail.com
Wed Aug 8 08:27:05 EDT 2007

On 8/8/07, Ladislav Andel <ladaan at iptel.org> wrote:
> > Don't.  Don't share state between different threads.  If you need to
> > mutate
> > state as a result of code which has run in a thread, do it in the reactor
> > thread based on the result of the Deferred returned by deferToThread.
> >
> I'm aiming to use results of the Deffered returned by deferToThread.
> Can you give me an example of combining two Deferred results?
> This will be done through callbacks but what if the blocking application
> gives me result in 5 sec
> and e.g. DNS check in 1 sec.

check gatherResults from twisted.internet.defer. basicaly it's:
d3 = defer.gatherResults(d1, d2)
where d1 is call to blocking app using deferToThread and d2 is DNS check

and d3 gets called back with results of d1 and d2 (if they both succeeded)


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