Am 24.06.2015 um 01:51 schröbte Soni L.:
and TValue l_registry; out of the global_State and into the lua_State.And then `io.open` wouldn't find its metatable when called from within a coroutine, C libraries would be loaded and gc'd multiple times, etc. ...How's that any different from creating multiple global states?
With multiple global Lua states * If you have `io.open`, you also have the FILE* metatable.* When the registry is collected and C libraries are unloaded, no function can run and call unloaded C functions (this is also a result of `dlopen`/`LoadLibrary` being reference counted). Most of the current use of the registry (`_LOADED`, `CLIBS`, `luaL_checkudata`, `luaL_ref`) depends on the fact that there is only one registry in a global state.
Philipp