You can make a Lua interpreter thread safe by adding a GIL. There is implicit support for this in the code: the interpreter invokes lua_lock/lua_unlock at the p

You can make a Lua interpreter thread safe by adding a GIL. There is implicit support for this in the code: the interpreter invokes lua_lock/lua_unlock at the proper places, the default Lua implementation just has them NOP'd out. Adding the thread primitives is up to you, however.