first commit

wp-content/plugins/sitepress-multilingual-cms/classes/utilities/lock/KeyedLock.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace WPML\Utilities;
+
+class KeyedLock extends Lock {
+
+	/** @var string $keyName */
+	private $keyName;
+
+	/**
+	 * Lock constructor.
+	 *
+	 * @param \wpdb  $wpdb
+	 * @param string $name
+	 */
+	public function __construct( \wpdb $wpdb, $name ) {
+		$this->keyName = 'wpml.' . $name . '.lock.key';
+		parent::__construct( $wpdb, $name );
+	}
+
+	/**
+	 * @param string $key
+	 * @param int    $release_timeout
+	 *
+	 * @return string|false The key or false if could not acquire the lock
+	 */
+	public function create( $key = null, $release_timeout = null ) {
+		$acquired = parent::create( $release_timeout );
+
+		if ( $acquired ) {
+
+			if ( ! $key ) {
+				$key = wp_generate_uuid4();
+			}
+
+			update_option( $this->keyName, $key );
+			return $key;
+		} elseif ( $key === get_option( $this->keyName ) ) {
+			$this->extendTimeout();
+			return $key;
+		}
+
+		return false;
+	}
+
+	public function release() {
+		delete_option( $this->keyName );
+		return parent::release();
+	}
+
+	private function extendTimeout() {
+		update_option( $this->name, time() );
+	}
+}