Ruby in a Nutshell

Name

Queue — Message queue class

Synopsis

This class provides the way to communicate data between threads.

Required Library

require ‘thread’

Class Method

Queue::new

Creates a queue object

Instance Methods

q.empty?

Returns true if the queue is empty.

q.num_waiting

Returns the number of threads waiting on the queue.

q.pop([non_block=false])

Retrieves data from the queue. If the queue is empty, the calling thread is suspended until data is pushed onto the queue. If non_block is true, the thread isn’t suspended, and an exception is raised.

q.push(obj)

q.enq(obj)

Pushes obj to the queue.

q.size

q.length

Returns the length of the queue.