tryPopUnlocked
Tries to pop data from the @queue. If no data is available, null is returned.
This function must be called while holding the @queue's lock.
Return
data from the queue or null, when no data is available immediately.
Tries to pop data from the @queue. If no data is available, null is returned.
This function must be called while holding the @queue's lock.
data from the queue or null, when no data is available immediately.