krz/vox-populi

 1<?php
 2namespace GuzzleHttp\Promise;
 3
 4interface TaskQueueInterface
 5{
 6    /**
 7     * Returns true if the queue is empty.
 8     *
 9     * @return bool
10     */
11    public function isEmpty();
12
13    /**
14     * Adds a task to the queue that will be executed the next time run is
15     * called.
16     *
17     * @param callable $task
18     */
19    public function add(callable $task);
20
21    /**
22     * Execute all of the pending task in the queue.
23     */
24    public function run();
25}