This is required for Xbox, Xbox 360, and Win32 emulators deriving a mutex via a the NT semaphore primitive instead of the builtin binary semaphore (event) and mutex.
[*] Fix: IO objects not using the explicit slow sync primitives.
Dunno how these werent refactored; then again, i never properly got around to finishing the factories for fast/slow io objects. In addition, some of these arent even accessed by the ILoopSource interface, so it's not as critical of a failure.
