Queue

Constructs an empty, bounded queue holding up to capacity elements for F data types that are cats.effect.kernel.GenConcurrent. When the queue is full (contains exactly capacity elements), every next Queue#offer will be backpressured (i.e. the Queue#offer blocks semantically).

Constructs an empty, bounded, circular buffer queue holding up to capacity elements for F data types that are cats.effect.kernel.GenConcurrent. The queue always keeps at most capacity number of elements, with the oldest element in the queue always being dropped in favor of a new elements arriving in the queue, and the offer effect itself will not semantically block.

Constructs an empty, bounded, dropping queue holding up to capacity elements for F data types that are cats.effect.kernel.GenConcurrent. When the queue is full (contains exactly capacity elements), every next Queue#offer will be ignored, i.e. no other elements can be enqueued until there is sufficient capacity in the queue, and the offer effect itself will not semantically block.

Constructs a queue through which a single element can pass only in the case when there are at least one taking fiber and at least one offering fiber for F data types that are cats.effect.kernel.GenConcurrent. Both Queue#offer and Queue#take semantically block until there is a fiber executing the opposite action, at which point both fibers are freed.

Constructs an empty, unbounded queue for F data types that are cats.effect.kernel.GenConcurrent. Queue#offer never blocks semantically, as there is always spare capacity in the queue.