[Python-ideas] Cofunctions - Back to Basics

[Christian Tismer]

Hi,

I found again a misunderstanding.

On 29.10.11 04:10, Nick Coghlan wrote:
> On Sat, Oct 29, 2011 at 8:40 AM, Ethan Furman <ethan at stoneleaf.us> wrote:
>> Greg Ewing wrote:
>>> Mark Shannon wrote:
>>>
>>>> Stackless provides coroutines. Greenlets are also coroutines (I think).
>>>>
>>>> Lua has them, and is implemented in ANSI C, so it can be done portably.
>>> These all have drawbacks. Greenlets are based on non-portable
>>> (and, I believe, slightly dangerous) C hackery, and I'm given
>>> to understand that Lua coroutines can't be suspended from
>>> within a C function.
>>>
>>> My proposal has limitations, but it has the advantage of
>>> being based on fully portable and well-understood techniques.
>> If Stackless has them, could we use that code?
> That's what the greenlets module *is* - the coroutine code from
> Stackless, lifted out and provided as an extension module instead of a
> forked version of the runtime.
>

No, the greenlet code is a subset of stackless.
Stackless could remove its greenlet part and become
an assembler-free implementation.
It would just not get over the C extension problem.

But that could then be handled by using the greenlet as an optional
external module.

(I think I said that before. Just wanted it to appear here)

-- 
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