Package COM.INFORMATIMAGO.CLEXT.QUEUE

Implements a thread-safe message queue.

(dequeue queue)

function

DO:         Atomically, dequeue the first message from the QUEUE.  If
            the queue is empty,  then wait on the not-empty condition
            of the queue.

RETURN:     the dequeued MESSAGE.

(enqueue queue message)

function

DO:         Atomically enqueues the MESSAGE in the QUEUE.  If the
            queue was empty, then a condition-notify is sent on the
            queue not-empty condition.

RETURN:     MESSAGE

(make-queue name)

function

RETURN:     A new queue named NAME

QUEUE

(queue-count queue)

function

RETURN:     The number of entries in the QUEUE.

NOTE:       The result may be falsified immediately, if another thread
            enqueues or dequeues.

(queue-emptyp queue)

function

RETURN:     Whether the queue is empty.

NOTE:       The result may be falsified immediately, becoming false if
            another thread enqueues, or becoming true if another
            thread dequeues.

(queue-name queue)

function

RETURN:     The name of the QUEUE.

(queuep x)

function

RETURN:     Predicate for the QUEUE type.