void sglua_register_comm_functions(lua_State* L);
msg_comm_t sglua_check_comm(lua_State* L, int index);
void sglua_push_comm(lua_State* L, msg_comm_t comm);
void sglua_register_host_functions(lua_State* L);
void sglua_register_comm_functions(lua_State* L);
msg_comm_t sglua_check_comm(lua_State* L, int index);
void sglua_push_comm(lua_State* L, msg_comm_t comm);
void sglua_register_host_functions(lua_State* L);