Modernize code

Author: dktapps

src/SleeperHandler.php

@@ -27,16 +27,15 @@ class SleeperHandler{
 	 * @var ThreadSafeArray
 	 * @phpstan-var ThreadSafeArray<int, int>
 	 */
-	private $sharedObject;
+	private readonly ThreadSafeArray $sharedObject;
 
 	/**
 	 * @var \Closure[]
 	 * @phpstan-var array<int, \Closure() : void>
 	 */
-	private $handlers = [];
+	private array $handlers = [];
 
-	/** @var int */
-	private $nextSleeperId = 0;
+	private int $nextSleeperId = 0;
 
 	public function __construct(){
 		$this->sharedObject = new ThreadSafeArray();

src/SleeperHandlerEntry.php

@@ -39,8 +39,8 @@ final class SleeperHandlerEntry extends ThreadSafe{
 	 * @phpstan-param ThreadSafeArray<int, int> $sharedObject
 	 */
 	public function __construct(
-		private ThreadSafeArray $sharedObject,
-		private int $id
+		private readonly ThreadSafeArray $sharedObject,
+		private readonly int $id
 	){}
 
 	final public function getNotifierId() : int{

src/SleeperNotifier.php

@@ -29,8 +29,8 @@ final class SleeperNotifier{
 	 * @phpstan-param ThreadSafeArray<int, int> $sharedObject
 	 */
 	public function __construct(
-		private ThreadSafeArray $sharedObject,
-		private int $notifierId
+		private readonly ThreadSafeArray $sharedObject,
+		private readonly int $notifierId
 	){}
 
 	/**