[Stackless] Quick Update on Select() and Feedback

Andrew Francis andrewfr_ice at yahoo.com
Fri Dec 18 20:51:46 CET 2009

Hi Folks:

I have started to prototype a Stackless select() function. For now
I want something similar to Go. I have success with the function using 
stackless.py over CPython. Carl Boltz and Stephan Diehl have been 
really helpful. I am still running tests and playing with 
algorithms but the initial code is pretty straightforward. I am also
writing documentation that I will post later with a new version of
stackless.py. I am not sure how new features are handled in the PyPy
or for that matter Stackless world.

the signature is:

(channel, value) = stackless.select([cases])

case, a tuple of (channel, operation, value) where operation is 

RECEIVE = -1, SEND = 1

I have attached an initial version. 

An early observation....

I am thinking to simplify implementing the code for C based Stackless
(as a subclass as per Richard Tew's suggestions), maybe two function 
could be added to channel.

channel._queueTasklet(current tasklet, operation)
channel._removeTasklet(tasklet, operation) 

Any feedback?


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