close

        # Thread::Queue.close

(from ruby core)
### Implementation from Queue
---
    close

---

Closes the queue. A closed queue cannot be re-opened.

After the call to close completes, the following are true:

*   `closed?` will return true

*   `close` will be ignored.

*   calling enq/push/<< will raise a `ClosedQueueError`.

*   when `empty?` is false, calling deq/pop/shift will return an object
    from the queue as usual.
*   when `empty?` is true, deq(false) will not suspend the thread and
    will return nil. deq(true) will raise a `ThreadError`.


ClosedQueueError is inherited from StopIteration, so that you can break
loop block.

Example:

    q = Thread::Queue.new
    Thread.new{
      while e = q.deq # wait for nil to break loop
        # ...
      end
    }
    q.close