Re: Fiber based coroutines

[Wim Couwenberg <wcou@...>]

> And questions for Wim, 
>
> Can you further explain the weak keyed table?

A fiber is a pair (userdata, lua thread).  The lua thread part is 
private to the userdata.  To prevent the lua threads from early gc, I 
maintain a weak keyed mapping  { userdata --> lua thread }.  As soon as 
the fiber dies I remove the userdata to allow gc of the thread.  Of 
course when the userdata is gc'ed there is obviously no need to remove 
it from this mapping explicitly.

> and
> I think it would be a good idea to add a __gc to something that
> will execute ConvertFiberToThread() when lua_close() is called.

Maybe, but (as already mentioned in the CoCo thread) this is a fairly 
new API call and it is certainly not available on my Win 98 based machine!

Also the documentation of CreateFiber is a bit worrying since it 
mentions some FP state problem.  CreateFiberEx should fix that, but is 
only available since some W2K version.

--
Wim