Lua userdata alignment

Question

How does lua_newuserdata align the allocated memory? Does it depend on malloc/calloc, or does it do it's own thing? Is there any way to guarantee alignment without having to add code for this?

Writing alignment code myself isn't a problem, but if it's not needed then I'd rather not, of course.

Answer 1

All memory allocation in Lua is done throughout a user-supplied allocator given when you create a state with lua_newstate .

If you use luaL_newstate instead of lua_newstate , then Lua uses a memory allocator based on realloc .