Re: How to make ROMable Lua data
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Re: How to make ROMable Lua data
- From: "Juris Kalnins" <juris@...>
- Date: 2009年1月13日 08:36:08 +0200
Sorry, but I don't understand how setting a metatable for the
lightuserdata type is equivalent to my patch.
Sorry, I wasn't very clear on that. I meant only the part of your patch that
implements light tables and functions.
set "__call" to something like this (sorry, this is not an actual code, i'm
just making it up here from memory):
int lightCall(lua_State *L) {
CFunction *p = lua_topointer(L, 1);
if (!ptr_in_code_segment(p)) return luaL_error(L, "not a function");
lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
return lua_gettop(L);
}
Now any CFunction pointer will be callable if pushed as lightuserdata.
Make something similar that does __len and __index for luaL_Reg pointers.
This way lightuserdata can act both as function and as table.
Most of what your patch does, and what cannot be accomplished by a
metatable, is initializing global environment so libraries do not
create lots of tables in RAM.
--j<