- /* it's a C function: just copy the pointer */
- lua_CFunction f = lua_tocfunction(src, -1);
- lua_pushcfunction(dst, f);
+ /* it's a C function */
+
+ XBT_DEBUG("It's a C function");
+ sglua_stack_dump("src before copying upvalues: ", src);
+
+ /* get the function pointer */
+ int function_index = lua_gettop(src);
+ lua_CFunction f = lua_tocfunction(src, function_index);
+
+ /* copy the upvalues */
+ int i = 0;
+ const char* upvalue_name = NULL;
+ do {
+ i++;
+ upvalue_name = lua_getupvalue(src, function_index, i);
+
+ if (upvalue_name != NULL) {
+ XBT_DEBUG("Upvalue %s", upvalue_name);
+ sglua_move_value(src, dst);
+ }
+ } while (upvalue_name != NULL);
+
+ sglua_stack_dump("src before copying pointer: ", src);
+
+ /* set the function */
+ lua_pushcclosure(dst, f, i - 1);
+ XBT_DEBUG("Function pointer copied");