diff --git a/kiri-engine/Pool/QueueInterface.php b/kiri-engine/Pool/QueueInterface.php
index 6e24515e..a17e6660 100644
--- a/kiri-engine/Pool/QueueInterface.php
+++ b/kiri-engine/Pool/QueueInterface.php
@@ -17,7 +17,7 @@ interface QueueInterface
 	 * @param float $timeout
 	 * @return void
 	 */
-	public function push(mixed $data, float $timeout = -1): void;
+	public function push(mixed $data, float $timeout = -1): bool;
 
 
 	/**
diff --git a/kiri-engine/Pool/SplQueue.php b/kiri-engine/Pool/SplQueue.php
index 1c4e390f..8c31be4e 100644
--- a/kiri-engine/Pool/SplQueue.php
+++ b/kiri-engine/Pool/SplQueue.php
@@ -11,9 +11,15 @@ use JetBrains\PhpStorm\Pure;
 class SplQueue implements QueueInterface
 {
 
+	/**
+	 * @var \SplQueue
+	 */
 	private \SplQueue $channel;
 
 
+	/**
+	 * @var int
+	 */
 	public int $errCode = 0;