A helper function to pop from IUntypedQueue.
A helper function to push into IUntypedQueue.
An interface for a FIFO queue with items of unspecified type (opaque chunks of data).
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An interface for a FIFO queue with items of unspecified type.
This interface is deliberately designed to be as minimal as possible, only covering the core functionality shared by the wide variety of possible queue implementations. For example, even a basic pop function which returns an item is not generic -- certain implementations may need to relinquish the item after popping it, making a simple pop-then-return implementation impossible. For this reason, some additional helper functions are provided, which may be useful with some queue implementations.