[Stackless] New Stacjless Protocol
tismer at stackless.com
Fri Mar 26 04:58:17 CET 2004
New Stackless Protocol
Stackless has used some extra fields in the type objects, to support
non-recursive calls. After dynamic classes evolved more and more,
keeping track of such extra fields has become more and more difficult.
In extent, I had to maintain quite a large number of function copies,
which behaved slightly different. After all, this approach didn't give
me all the results I expected.
Since yesterday, I have been working intensively on a new approach.
It might be sligtly less efficient, but it seems to be very, very clean.
tp_call_nr and tp_iternext_nr have been removed from type objects. So
far, type objects are unchanged, again.
Stackless instead now supports an implicit parameter for every function
call. It would be great if we could make it into an explicit parametzer,
but that would change the implementation completely.
Information about the concrete implementation should probably go
Just summarizing: Stackless passes all Python tests and all of its
the code base is reduced, again, and we have a couple of noew
- tasklet.raise_exception can run stackless,
- tasklet.kill can run stackless,
- generator.next can run stackless, like "for i in generator" could
already, last time.
This version of stackless is not accessible via the stackless cvs.
If you want to try it, you need to use
cvs co slpdev/src/2.3/dev
Will add a link to this to the public pages, soon.
cheers -- chris
p.s.: please look into the stackless news items.
p.p.s.: I'm eagerly looking for new activities of the
former sprinters. Are you missing something from me???
Christian Tismer :^) <mailto:tismer at stackless.com>
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