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Tom Miles a écrit :

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?).

Can you show us how you initialize your thread??

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.

If you use a weak value table, the entry will be deleted when the object
is collected.

Just put "v" in field __mode of the metatable of your table. If you want
weak key, just put "k".

Julien Hamaide

Lead Programmer

10Tacle Studios Belgium

Thanks for any help. Tom -----Original Message----- *From:* []*On Behalf Of* Raymond Jacobs
*Sent:* 18 May 2006 16:20
*To:* Lua list
*Subject:* Re: About lua_newthread

    When you are done with a thread (when lua_resume returns and it's
    not a yield), you should remove the thread directly from the
    stack, this will remove the reference to it and it can then be
    garbage collected (its a pain I know =/).
another method which I've not yet done but should work, is to
    create a new thread, create a lua reference to it (using lua_ref)
    then pop it off the stack immediately (so it doesn't get buried),
    and later when you are done with it, destroy the reference
    (lua_unref) and that should allow it to be GC'd
hope that helps, Raymond Jacobs
    Ethereal Darkness Interactive

On 5/18/06, *mos* < <>>


        in lua5.1 manual:

                 lua_State *lua_newthread (lua_State *L);
        There is no explicit function to close or to destroy a thread.
        Threads are
        subject to garbage collection, like any Lua object

               I don't understand this , for example like Npc in a game

               function AI()
                       while(true) do

               I bind each npc with a lua_State by lua_newthread

               but the npc will die and i should close the lua_State ,
        but I can
               what can I do ? or some better suggestion ?

        Best Regards