Thread::Queue - thread-safe queues
use Thread::Queue;my $q = new Thread::Queue;$q->enqueue("foo", "bar");my $foo = $q->dequeue; # The "bar" is still in the queue.my $foo = $q->dequeue_nb; # returns "bar", or undef if the queue was emptymy $left = $q->pending; # returns the number of items still in the queueA queue, as implemented byThread::Queue is a thread-safe data structure much like a list. Any number of threads can safely add elements to the end of the list, or remove elements from the head of the list. (Queues don't permit adding or removing elements from the middle of the list).
Thenew function creates a new empty queue.
Theenqueue method adds a list of scalars on to the end of the queue. The queue will grow as needed to accommodate the list.
Thedequeue method removes a scalar from the head of the queue and returns it. If the queue is currently empty,dequeue will block the thread until another threadenqueues a scalar.
Thedequeue_nb method, like thedequeue method, removes a scalar from the head of the queue and returns it. Unlikedequeue, though,dequeue_nb won't block if the queue is empty, instead returningundef.
Thepending method returns the number of items still in the queue.
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