Re: gc confusion

[Juergen Fuhrmann <fuhrmann@...>]

>  Wed, 19 Feb 2003 11:27:44 -0300
>  Roberto Ierusalimschy <roberto@inf.puc-rio.br> wrote:
>
>  > When userdata is  garbage collected if I  call Lua from C ?  I call it
>  > this way: [...]
>  
>  When you do
>  
>      lua_pushusertag(L,my,my_tag);
>  
>  you may create a new userdata, or not, if there is one like it already.
>  (This is one of the reasons we change this in Lua 5.0. In 4.0 there
>  is no way to know when you actually create a new userdata.) If you
>  are creating a new userdata (that i,s "my" is a new address), then
>  this stack entry is its only reference. Once myPrint returns, there is
>  no reference left to this new userdata, so it should be collected in
>  the next GC cycle. (It may be collected even before that, if myPrint
>  modifies this argument and there is a GC cycle.)
>  

Ok. This  means that it needs to  be garbage collected if  there is no
reference.   I force  a GC  cycle just  after the  call, so  the linux
behaviour is right. 

But why on 64 bit, the behaviour is different ?

Juergen