Re: Newbie: Cooperative Multitasking

[Derek Wong <derekw@...>]

Hi,

I see the problem, I was reading the archives from the lua ftp site, file
lua-l-archive.gz. I guess in that archive they did delete that
post...thanks for the pointer to the post on the web site. I guess I'll
start digging into the lua interpreter code and see what I can come up
with. 

Any pointers on where I should try to start/stop the scripts? Should it be
at the level of the virtual machine, maybe make a new opcode or some kind
of flag that gets checked?  Or should it be higher up like in the function
luaD_protectedrun? Or is it somewhere in between? 

Derek
On Thu, 4 Nov 1999, Bret Mogilefsky wrote:

> On Thu, Nov 04, 1999 at 12:26:41AM -0200, Derek Wong wrote:
> > I was wondering if someone might
> > offer me some advice at implementing cooperative multitasking with
> > lua scripts. I'm an amateur programmer so please excuse me if I've
> > used the wrong terminology.
> [...]
> > C program runs along and starts a Lua script...
> > Lua script does some stuff and then executes a pause() command
> >  expecting the C program to resume at that point when it's ready...
> > C program goes along doing other stuff and then at some point
> >  along the way will check if there are any Lua scripts waiting
> >  to be resumed, if there are it will resume their execution at
> >  where they left off...
> 
> You'll want to read back through the mailing list archives... Start on the
> thread "Game oriented usage of Lua?", which you can find here:
> 
> 	http://www.egroups.com/group/lua-l/?isDecendingSort=0&searchStart=904&isThreaded=0&fetchForward=0&start=904
> 
> At one point in that thread I wrote a LARGE description of how I used Lua in
> Grim Fandango when I was at LucasArts, as well as how I modified the
> interpreter to support cooperative threading.  I was afraid of getting fired
> for divulging details at the time, so I agreed to post on the condition that
> it not be included in the archive... However, this is exactly the post you
> need!  Oh wait, never mind.  Good thing I already have another job... Here's
> the post:
> 
> 	http://www.egroups.com/group/lua-l/905.html?
> 
> I don't have time to read back through the whole thread right this second to
> see if I gave details on the gotchas in threading up the interpreter, but I
> can give you a thumbnail sketch of how to do it.
> 
> Nice to be back on the list...
> 
> Bret
> -- 
> "Why, that's the second biggest monkey head I've ever seen!" --Guybrush
> "LeChuck's dead. I blew him into a million gooey pieces."    --Guybrush
> Bret Mogilefsky  ** mogul at ay see em dot org **  Programmer, SCEA R&D
> 
>