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ArrayBroadcastChannel(capacity: Int)Platform and version requirements: JVM
Broadcast channel with array buffer of a fixed capacity. Sender suspends only when buffer is full due to one of the receives being slow to consume and receiver suspends only when buffer is empty.
Note, that elements that are sent to the broadcast channel while there are no openSubscription subscribers are immediately lost.
This channel is created by BroadcastChannel(capacity) factory function invocation.
This implementation uses lock to protect the buffer, which is held only during very short buffer-update operations. The lock at each subscription is also used to manage concurrent attempts to receive from the same subscriber. The lists of suspended senders or receivers are lock-free.