Feature: FOR UPDATE SKIP LOCKED

I’m been reading up on  FOR UPDATE NOWAIT and it looks like it was added in 8.1.

How difficult is it to add FOR UPDATE SKIP LOCKED or something similar? (basically skip locked rows / oracle syntax)

More background here:

http://forge.mysql.com/worklog/task.php?id=3597

It would be quite useful to implement a database queue. Although FOR UPDATE NOWAIT and trying again can work as well as other techniques,

just skipping over the locks has its advantages (simplicity and zero wait)