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Hi Thomas On 11/08/09 15:27, Thomas Harning Jr. wrote:
Sorry, bit of brain-fade. I meant weak-valued table (light ud pointer as key, UD as value).Pointer's wouldn't work either (if I have that right)... assuming you're pushing them as lightuserdata, my guess is that they behave just like strings and numbers would, since they are a 'primitive' type. Also... the GC has no clue that a lightuserdata is equivalent to a given userdata, table, function when iterating for cleanup, so the GC wouldn't even be able to mark the two items as the same.... now.. that's assuming weak-keyed...
Hmm...quick look in PiL doesn't add anything here. Not too sure what happens if you try and unref something that's already been removed by the GC....As for weak-valued, then both lightuserdata and luaL_ref and the like would work correctly (I think) .. just that there'd be holes showing up over time. If the holes can be re-filled by new data and re-returned through luaL_ref ... I don't know.... implementation defined.
Lawrie