VOID
ExReleaseFastMutex(
IN PFAST_MUTEX FastMutex
);
ExReleaseFastMutex releases ownership of a fast mutex that was acquired with ExAcquireFastMutex or ExTryToAcquireFastMutex.
ExReleaseFastMutex releases ownership of the given fast mutex and reenables the delivery of APCs to the current thread.
It is a programming error to call ExReleaseFastMutex with a FastMutex that was acquired with ExAcquireFastMutexUnsafe.
Callers of ExReleaseFastMutex must be running at IRQL < DISPATCH_LEVEL.
ExAcquireFastMutex, ExInitializeFastMutex, ExTryToAcquireFastMutex