Function luaS_newudata

third-party/lua-5.1.5/src/lstring.c:96–110

Udata *luaS_newudata (lua_State *L, size_t s, Table *e) {
  Udata *u;
  if (s > MAX_SIZET - sizeof(Udata))
    luaM_toobig(L);
  u = cast(Udata *, luaM_malloc(L, s + sizeof(Udata)));
  u->uv.marked = luaC_white(G(L));  /* is not finalized */
  u->uv.tt = LUA_TUSERDATA;
  u->uv.len = s;
  u->uv.metatable = NULL;
  u->uv.env = e;
  /* chain it on udata list (after main thread) */
  u->uv.next = G(L)->mainthread->next;
  G(L)->mainthread->next = obj2gco(u);
  return u;
}