Re: LUA Coroutines (from C/Lua/C callbacks)

[Rici Lake <lua@...>]

On 3-Aug-05, at 10:18 PM, Shaun wrote:

> Hi,
>
> I've been watching the discussion regarding coroutines with interest.
>
> Does anyone have any idea if the Resumable VM Patch 
> (http://lua-users.org/wiki/ResumableVmPatch) will make it in to the 
> next release of LUA? The ability to properly yield from C callback 
> functions is pretty crucial for my application but I'd rather avoid 
> merging a fork of the mainline.

One solution I've used to get around the problem of yielding from 
callbacks is to simply turn it on its head: instead of yielding from 
the C callback, you yield to the C callback. (That is, instead of 
callback(args), you issue coroutine.yield(callback, args), but you can 
hide that inside a convenience function so that it actually looks like 
callback(args).)

Of course, you still need to deal with saving state in the callback 
handler.