tonyxiao/MAKVONotificationCenter — comment on commit 003d01888c0bc2994866aeaca43074445d03967c
File:  line 0
By mikeash:

Looks pretty good overall. However, one queue for the entire class doesn't quite make sense. It should be an ivar and therefore be a per-instance queue, to preserve the same semantics as `@synchronized(self)`. Can you make that change? (Making `defaultCenter` use `dispatch_once` is very nice, by the way.)