View file File name : TaskQueue.php Content :<?php declare (strict_types=1); namespace YoastSEO_Vendor\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 \YoastSEO_Vendor\GuzzleHttp\Promise\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; } }