Re: Yielding across C boundaries
- From: Mike Pall <mike-1301@xxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Wed, 2 Jan 2013 16:55:57 +0100
Lyn Headley wrote:
> I have been looking into Coco but I can't figure out if it is
> compatible with Luajit 2.0.
Coco was used for LuaJIT 1.x. But switching C stacks caused too
many problems. That's why LuaJIT 2.0 doesn't use it anymore (it's
able to yield across builtins, but not across arbitrary C calls).
> Are there any strategies people recommend for doing this, or
> must I restructure my program?
You're probably using LuaJIT for its performance benefits. But
callbacks from C into the VM are slow -- really slow compared to
everything else. If possible, rewrite the intervening C code in
Lua (maybe with the help of the FFI) and/or switch to a pull-style
API (iterator instead of callbacks).
--Mike
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