Re: Proposed C API function: lua_getmainthread

[Matt Campbell <mattc@...>]

The function I'm proposing is very simple, though it does require an 
addition to the Lua core.  Here's what I added to lapi.c:

LUA_API lua_State *lua_getmainthread (lua_State *L) {
 lua_State *L1;
 lua_lock(L);
 L1 = G(L)->mainthread;
 lua_unlock(L);
 return L1;
}

I don't know if the calls to lua_lock and lua_unlock are truly 
necessary, but I figured I'd be on the safe side.  Adding this API 
function has at least one advantage over storing the main state in the 
registry:  with this API function, any library can obtain the main state 
without requiring the host application to do any special 
initialization.  Libraries such as LuaCOM can then take advantage of 
this feature; in fact, I'm about to modify my copy of LuaCOM to do so.

--
Matt Campbell
Lead Programmer
Serotek Corporation
www.freedombox.info
"The Accessibility Anywhere People"