diff --git a/kiri-engine/Coordinator.php b/kiri-engine/Coordinator.php
index c4544b9b..16353ceb 100644
--- a/kiri-engine/Coordinator.php
+++ b/kiri-engine/Coordinator.php
@@ -11,7 +11,7 @@ class Coordinator
 
 	const string WORKER_START = 'worker:start';
 
-	private bool $wait = true;
+	private bool $wait = false;
 
 	private ?Channel $channel = null;
 
@@ -22,12 +22,17 @@ class Coordinator
 	public function yield(): void
 	{
 		if (Coroutine::getCid() > 0) {
-			$this->channel = new Channel(1);
-			$this->channel->pop();
-		} else {
-			while ($this->wait) {
-				usleep(1000);
+			if ($this->channel instanceof Channel) {
+				$this->channel->pop();
 			}
+			return;
+		}
+
+		if ($this->wait === false) {
+			return;
+		}
+		while ($this->wait === true) {
+			usleep(1000);
 		}
 	}
 
@@ -37,8 +42,7 @@ class Coordinator
 	 */
 	public function wait(): void
 	{
-		$this->wait = true;
-		$this->channel = null;
+		Coroutine::getCid() > 0 ? $this->channel = new Channel(1) : $this->wait = true;
 	}
 
 
@@ -47,8 +51,13 @@ class Coordinator
 	 */
 	public function done(): void
 	{
-		$this->wait = false;
-		$this->channel?->push(true);
+		if (Coroutine::getCid() > 0) {
+			$this->channel?->push(true);
+			$this->channel->close();
+			$this->channel = null;
+		} else {
+			$this->wait = false;
+		}
 	}
 
 }