Also, in this paradigm, only one thread calls refresh() at any give time (either the MonitorThread or before the thread is created, the initializer thread). This is contrary to some definitions of lock free, such as [1], "if any thread performing an operation on the data structure is suspended at any point during that operation then the other threads accessing the data structure must still be able to complete their tasks". If we kill MonitorThread, other threads accessing RSState won't be able to complete their operation.
[1] http://www.justsoftwaresolutions.co.uk/threading/non_blockin...