poll

open suspend override fun poll(timeout: Long, unit: TimeUnit): E?

Retrieves and removes the head of this queue, waiting up to the specified wait time if necessary for an element to become available.

the head of this queue, or null if the specified waiting time elapses before an element is available

timeout

how long to wait before giving up, in units of unit

unit

a TimeUnit determining how to interpret the timeout parameter

if interrupted while waiting

open override fun poll(): E?

Retrieves and removes the head of this queue, or returns null if this queue is empty.

the head of this queue, or null if this queue is empty