LuaInterface.LuaDLL.lua_pushlightuserdata C# (CSharp) Method

        public static extern void lua_pushlightuserdata(IntPtr luaState, IntPtr udata);
        [DllImport(LUADLL, CallingConvention = CallingConvention.Cdecl)]

        public LuaState()
        {
            // Create State
            L = LuaDLL.luaL_newstate();

            // Create LuaInterface library
            LuaDLL.luaL_openlibs(L);
            LuaDLL.lua_pushstring(L, "LUAINTERFACE LOADED");
            LuaDLL.lua_pushboolean(L, true);
            LuaDLL.lua_settable(L, (int)LuaIndexes.LUA_REGISTRYINDEX);
            LuaDLL.lua_newtable(L);
            LuaDLL.lua_setglobal(L, "luanet");
            LuaDLL.lua_pushvalue(L, (int)LuaIndexes.LUA_GLOBALSINDEX);
            LuaDLL.lua_getglobal(L, "luanet");
            LuaDLL.lua_pushstring(L, "getmetatable");
            LuaDLL.lua_getglobal(L, "getmetatable");
            LuaDLL.lua_settable(L, -3);

            // Set luanet as global for object translator
            LuaDLL.lua_replace(L, (int)LuaIndexes.LUA_GLOBALSINDEX);
            translator = new ObjectTranslator(this, L);
            LuaDLL.lua_replace(L, (int)LuaIndexes.LUA_GLOBALSINDEX);

            GCHandle handle  = GCHandle.Alloc(translator, GCHandleType.Pinned);
            IntPtr   thisptr = GCHandle.ToIntPtr(handle);

            LuaDLL.lua_pushlightuserdata(L, thisptr);
            LuaDLL.lua_setglobal(L, "_translator");

            tracebackFunction = new LuaCSFunction(LuaStatic.traceback);

            // We need to keep this in a managed reference so the delegate doesn't get garbage collected
            panicCallback = new LuaCSFunction(LuaStatic.panic);
            LuaDLL.lua_atpanic(L, panicCallback);

            printFunction = new LuaCSFunction(LuaStatic.print);
            LuaDLL.lua_pushstdcallcfunction(L, printFunction);
            LuaDLL.lua_setfield(L, LuaIndexes.LUA_GLOBALSINDEX, "print");

            loadfileFunction = new LuaCSFunction(LuaStatic.loadfile);
            LuaDLL.lua_pushstdcallcfunction(L, loadfileFunction);
            LuaDLL.lua_setfield(L, LuaIndexes.LUA_GLOBALSINDEX, "loadfile");

            dofileFunction = new LuaCSFunction(LuaStatic.dofile);
            LuaDLL.lua_pushstdcallcfunction(L, dofileFunction);
            LuaDLL.lua_setfield(L, LuaIndexes.LUA_GLOBALSINDEX, "dofile");

            // Insert our loader FIRST
            loaderFunction = new LuaCSFunction(LuaStatic.loader);
            LuaDLL.lua_pushstdcallcfunction(L, loaderFunction);
            int loaderFunc = LuaDLL.lua_gettop(L);

            LuaDLL.lua_getfield(L, LuaIndexes.LUA_GLOBALSINDEX, "package");
            LuaDLL.lua_getfield(L, -1, "loaders");
            int loaderTable = LuaDLL.lua_gettop(L);

            // Shift table elements right
            for (int e = LuaDLL.luaL_getn(L, loaderTable) + 1; e > 1; e--)
            {
                LuaDLL.lua_rawgeti(L, loaderTable, e - 1);
                LuaDLL.lua_rawseti(L, loaderTable, e);
            }
            LuaDLL.lua_pushvalue(L, loaderFunc);
            LuaDLL.lua_rawseti(L, loaderTable, 1);
            LuaDLL.lua_settop(L, 0);

            DoString(LuaStatic.init_luanet);
        }