[pypy-dev] Tealets Re: Stackless work

[Andrew Francis]

Hi Da_Blitz:

--- On Mon, 5/23/11, Da_Blitz <pypy at pocketnix.org> wrote:

> i have seen some tealets work but no documentation from
> what i have overheard it seems like stackless should be posible if
> someone devoes quite a bit of effort to it, 

I just googled and I see work has been done. Too cool!

> got  anymore info on this join pattern, i am hoping/assuming its not a fork >and join to offload to other cores as i am more concerned
> about having huge amounts of threads/tasklets

Join Patterns come out of JoCAML and Polyphonic C#. They are a concurrency mechanism. Hopefully, Join Patterns will allow a Stackless programmer to do stuff like

# block until all nine reindeer channels are ready to receive, OR
# any three of Santa's too many to count army of elves OR
# a timeout occurs

reindeer = [CUPID, DASHER, PRANCER, BLITZEN, DANCER, COMET, VIXEN, \
            DONNER,RUDOLPH]
results = stackless.select(joinPattern(reindeer, joinPattern(elves, 3),
                          timeout)

if results == reindeer:
   for result in reindeer:
       # read data from each reindeer
       .....

right now join patterns and stackless.select() are not official parts of C based Stackless Python or stackless.py

Cheers,
Andrew