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File / Folder	Size	Action
.	-
AggregateException.php	0.403KB	edt ren
CancellationException.php	0.204KB	edt ren
Coroutine.php	4.063KB	edt ren
Create.php	1.964KB	edt ren
Each.php	2.597KB	edt ren
EachPromise.php	7.415KB	edt ren
FulfilledPromise.php	1.995KB	edt ren
Is.php	0.919KB	edt ren
Promise.php	8.747KB	edt ren
PromiseInterface.php	2.757KB	edt ren
PromisorInterface.php	0.243KB	edt ren
RejectedPromise.php	2.213KB	edt ren
RejectionException.php	1.211KB	edt ren
TaskQueue.php	1.967KB	edt ren
TaskQueueInterface.php	0.439KB	edt ren
Utils.php	8.18KB	edt ren

<?php

declare(strict_types=1);

namespace GuzzleHttp\Promise;

/**
 * A task queue that executes tasks in a FIFO order.
 *
 * This task queue class is used to settle promises asynchronously and
 * maintains a constant stack size. You can use the task queue asynchronously
 * by calling the `run()` function of the global task queue in an event loop.
 *
 *     GuzzleHttp\Promise\Utils::queue()->run();
 *
 * @final
 */
class TaskQueue implements TaskQueueInterface
{
    private $enableShutdown = true;
    private $queue = [];

public function __construct(bool $withShutdown = true)
    {
        if ($withShutdown) {
            register_shutdown_function(function (): void {
                if ($this->enableShutdown) {
                    // Only run the tasks if an E_ERROR didn't occur.
                    $err = error_get_last();
                    if (!$err || ($err['type'] ^ E_ERROR)) {
                        $this->run();
                    }
                }
            });
        }
    }

public function isEmpty(): bool
    {
        return !$this->queue;
    }

public function add(callable $task): void
    {
        $this->queue[] = $task;
    }

public function run(): void
    {
        while ($task = array_shift($this->queue)) {
            /** @var callable $task */
            $task();
        }
    }

/**
     * The task queue will be run and exhausted by default when the process
     * exits IFF the exit is not the result of a PHP E_ERROR error.
     *
     * You can disable running the automatic shutdown of the queue by calling
     * this function. If you disable the task queue shutdown process, then you
     * MUST either run the task queue (as a result of running your event loop
     * or manually using the run() method) or wait on each outstanding promise.
     *
     * Note: This shutdown will occur before any destructors are triggered.
     */
    public function disableShutdown(): void
    {
        $this->enableShutdown = false;
    }
}

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