Re: Returns lua_newuserdata a constant address?

[Rici Lake <lua@...>]

The current garbage collector is non-moving, and it is hard to imagine 
this changing. Garbage collection might happen at virtually any moment; 
if strings and userdata could move around unexpectedly, it would 
severely complicate the C interface.

On 2-Aug-04, at 4:10 AM, Michael Roth wrote:

> Is the pointer returned by lua_newuserdata() a constant one or exists a
> possibility that the memory block will be moved by lua and the address
> of the returned memory block change during garbage collection?
>
> I plan to use a C-pointer stored outside the lua context pointing to a
> memory block returned by lua_newuserdata().
>
> I know already, if there aren't any references from lua to the userdata
> object the memory block will be collected and my pointer become 
> invalid.