System.Threading.ReaderWriterLockSlim.ExitAndWakeUpAppropriateWaiters C# (CSharp) Method

		private void ExitAndWakeUpAppropriateWaiters()
		{
			Debug.Assert (MyLockHeld);

			// First a writing thread waiting on being upgraded
			if (owners == 1 && numUpgradeWaiters != 0){
				// Exit before signaling to improve efficiency (wakee will need the lock)
				ExitMyLock ();
				// release all upgraders (however there can be at most one). 
				upgradeEvent.Set ();
				//
				// TODO: What does the following comment mean?
				// two threads upgrading is a guarenteed deadlock, so we throw in that case. 
			} else if (owners == 0 && numWriteWaiters > 0) {
				// Exit before signaling to improve efficiency (wakee will need the lock)
				ExitMyLock ();
				// release one writer. 
				writeEvent.Set ();
			}
			else if (owners >= 0 && numReadWaiters != 0) {
				// Exit before signaling to improve efficiency (wakee will need the lock)
				ExitMyLock ();
				// release all readers.
				readEvent.Set();
			} else
				ExitMyLock();
		}