Re: running LUA code step by step

[Roberto Ierusalimschy <roberto@...>]

> 1) Fire up new fibers (and call lua_newthread) for new objects which
> need their own script execution/stack/lua_state
> 2) Keep a list of objects that are ready to execute. Loop over all
> objects and switch to their fiber.
> 3) In each object, figure out when they want to yield, either by a
> line/call hook, or by a call into a registered C function that indicates
> they need to wait (like a call that blocks on something out of its
> control).
> 4) When an object is ready to yield, switch back to the primary fiber.
> 5) Depending on your needs, have some plan to add objects back to the
> ready list. If you want all objects to execute code on every cycle, then
> maybe you don't need a ready list, but I use it to mark scripts that are
> ready to continue after having some condition met that they are blocked
> on.

You should be able to do exactly the same thing with coroutines in
Luaw4. (The only drawback is that currently you cannot yield inside a
linehook; we will correct that. But you can yield inside a registered C
function that indicates they need to wait.)

-- Roberto