Re: About lua_newthread

[Lisa Parratt <lisa@...>]

Tom Miles wrote:
> Hi,
>  
> Sorry about the the thread necromancy, but I have just encountered 
> this situation in the project I am currently working on.  I am running 
> several threads from my main thread, all of which are just loaded with 
> functions to call in an event based system.  At various intervals I 
> want to "unload" these functions and load a new set, so I want to shut 
> down the thread.  I therefore need to remove references to my thread 
> from the stack as per the suggestion, however, when I iterate through 
> the stack all that is on there is a userdata of indeterminate origin, 
> not a thread.  (Having said that, I've just discovered that if I do 
> lua_touserdata() and compare it to the address of the state returned 
> with lua_newthread(), then they are the same, so I have found my 
> thread - but there seems to be a little bug there as it isn't of type 
> thread?).
It strikes me the crux of this problem isn't that there's not a function 
to delete a thread, but simply that you're using the stack as a 
persistent store for thread objects. Take them off the stack, stash them 
some where more sensible - a member of the table representing the actor 
the thread represents, or a schedule table, or other similar options.
> On a similar note, is there a way of removing a non integer index from 
> a table?  I use the thread as a key in a table to match it up to a 
> game object, and when that object is destroyed I want to remove the 
> entry in the table as well.
As others have said - weak tables.

--
Lisa