[Stackless] Fwd: Questions related to stackless

Jiwon Seo seojiwon at gmail.com
Tue Oct 26 07:13:05 CEST 2004


I've sent this message once, but it seems that the maillinglist only
accepts mails from the subscribers, so I've subscribed and am
forwarding original message. If anyone gets this message twice, please
forgive me.

Thanks.


---------- Forwarded message ----------
From: Jiwon Seo <seojiwon at gmail.com>
Date: Mon, 25 Oct 2004 18:39:47 +0900
Subject: Questions related to stackless
To: stackless at stackless.com
Cc: tismer at stackless.com


Hello!

I have questions regarding stackless python, and I guess this mailing
list is probably right place to ask. :)

All of my question is related to
http://www.stackless.com/spcpaper.htm#_Toc470444074  <- this paper.
(I understand that stackless has been changed alot since that paper,
but I need to understand that paper, since I am supposed to give
presentation about that - continuation, microthread, etc.)

questions are

1. From that paper, "Figure 1: Multiple Return"case is solved by
"Figure 2: Frame Mutation". But does it solve following case?

def foo():
   a = 10
   make_and_run_continuation(bar) # --- a)
   a = 11
   make_and_run_continuation(zoo) # --- b)
   a = 12

In this case, a) and b) return to the same frame, but the state of the
frame is different. So, I think there should be two original frame,
not one like Figure 1 says. Am I right?

2. Figure 3: Nodes Collect References <-- I don't really understand
what this diagram says. Could someone please explain this to me? (What
does this diagram solve, and how, etc) :)

Thanks!

Jiwon

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