NdsStoreAccessSync

Synchronizes access to an onboard NDS map.

An object of this class acts as a kind of a reader/writer lock, in that it allows any number of concurrent readers to access the map at the same time, or one writer and nobody else. It also offers facilities for writers to notify all current readers that the map needs to be modified so they (the readers) can 'let go'. After the writer has finished modifying the map, NdsStoreAccessSync will dispatch notifications to all others to let them know the map is accessible once again.