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<?php

namespace RectorPrefix202410\React\EventLoop\Tick;

use SplQueue;
/**
 * A tick queue implementation that can hold multiple callback functions
 *
 * This class should only be used internally, see LoopInterface instead.
 *
 * @see LoopInterface
 * @internal
 */
final class FutureTickQueue
{
    private $queue;
    public function __construct()
    {
        $this->queue = new SplQueue();
    }
    /**
     * Add a callback to be invoked on a future tick of the event loop.
     *
     * Callbacks are guaranteed to be executed in the order they are enqueued.
     *
     * @param callable $listener The callback to invoke.
     */
    public function add($listener)
    {
        $this->queue->enqueue($listener);
    }
    /**
     * Flush the callback queue.
     */
    public function tick()
    {
        // Only invoke as many callbacks as were on the queue when tick() was called.
        $count = $this->queue->count();
        while ($count--) {
            \call_user_func($this->queue->dequeue());
        }
    }
    /**
     * Check if the next tick queue is empty.
     *
     * @return boolean
     */
    public function isEmpty()
    {
        return $this->queue->isEmpty();
    }
}