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On Fri, Dec 18, 2009 at 5:06 PM, Francesco Abbate <> wrote:
> I was thinking that it would be nice if the userdata could store one
> or more reference to other userdata objects in order to ensure that
> the GC does not free the main object that own the resource if other
> objects that need the same resource are still alive.

wouldn't it be much lighter to add a refcount field to your C data?
increment when you add a Lua userdata, decrement on __gc, dispose if
reaches zero.