Re: Leaving objects permanently on the stack

[Peter Shook <pshook@...>]

Tobias Käs wrote:
> Is it safe to leave objects on the stack for faster access, using 
> absolute stack indices?
> I consider this to avoid getting the same tables from the registry, each 
> time a C function needs it (I have several of this kind).

If you mean after calling lua_open(), to push some values on the stack 
before running your script so that you can access them in your 
C-function, then the answer is no you can't do that.  Inside any 
C-function called from a Lua script, stack index 1 is the first argument 
passed to the function.

You could make you C-function a C-closure that keeps your table as an 
upvalue.  See lua_pushcclosure and lua_upvalueindex.

- Peter Shook