Re: Garbage collection vs. userdata

["O. Wölfelschneider" <lua@...>]

Jerome Vuarand wrote:
> If you want Lua to manage the memory allocated by that library, you
> can write a custom allocator that you would pass to that library. The
> allocator would allocate the big chunk of memory as a Lua userdata.
> That way the Lua garbage collector would be aware of it. You can then
> tell the GC about the dependency between your small userdata (the one
> you already have with just a pointer) and the big one (the memory
> chunk) with environment tables.

In that case I could just get rid of the indirection and put the library chunk 
directly into the userdata.

However, if I allocate something using lua_newuserdata(), will the pointer be 
constant over its lifetime?

I fear the GC might like to move userdata around in memory during sweeps?

Thanks,
Olav Wölfelschneider