变更

Mysql/PDO.php

@@ -353,7 +353,7 @@ class PDO implements StopHeartbeatCheck
 	public function _pdo(): \PDO
 	{
 		if (!($this->pdo instanceof \PDO)) {
-			$this->pdo = $this->newClient();
+			$this->newClient();
 		}
 		return $this->pdo;
 	}
@@ -364,14 +364,6 @@ class PDO implements StopHeartbeatCheck
 	 */
 	private function newClient(): \PDO
 	{
-		while ($this->group->count() > 0) {
-			Coroutine::sleep(0.0001);
-		}
-		$this->group->add();
-		Coroutine::create(function () {
-			Coroutine::defer(function () {
-				$this->group->done();
-			});
 		$link = new \PDO('mysql:dbname=' . $this->dbname . ';host=' . $this->cds, $this->username, $this->password, [
 			\PDO::ATTR_EMULATE_PREPARES   => false,
 			\PDO::ATTR_CASE               => \PDO::CASE_NATURAL,
@@ -388,12 +380,7 @@ class PDO implements StopHeartbeatCheck
 		if (Db::inTransactionsActive()) {
 			$link->beginTransaction();
 		}
-
-			$this->pdo = $link;
-		});
-		$this->group->wait();
-
-		return $this->pdo;
+		return $this->pdo = $link;
 	}
 
 }