1 files changed, 65 insertions, 0 deletions
diff --git a/plugins/jetpack/vendor/automattic/jetpack-sync/src/class-lock.php b/plugins/jetpack/vendor/automattic/jetpack-sync/src/class-lock.php
new file mode 100644
index 00000000..84d87bc8
--- /dev/null
+++ b/plugins/jetpack/vendor/automattic/jetpack-sync/src/class-lock.php
@@ -0,0 +1,65 @@
+<?php
+/**
+ * Lock class.
+ *
+ * @package automattic/jetpack-sync
+ */
+
+namespace Automattic\Jetpack\Sync;
+
+/**
+ * Lock class
+ */
+class Lock {
+	/**
+	 * Prefix of the blog lock transient.
+	 *
+	 * @access public
+	 *
+	 * @var string
+	 */
+	const LOCK_PREFIX = 'jp_sync_lock_';
+
+	/**
+	 * Default Lifetime of the lock.
+	 *
+	 * @access public
+	 *
+	 * @var int
+	 */
+	const LOCK_TRANSIENT_EXPIRY = 15; // Seconds.
+
+	/**
+	 * Attempt to lock.
+	 *
+	 * @access public
+	 *
+	 * @param string $name lock name.
+	 * @param int    $expiry lock duration in seconds.
+	 *
+	 * @return boolean True if succeeded, false otherwise.
+	 */
+	public function attempt( $name, $expiry = self::LOCK_TRANSIENT_EXPIRY ) {
+		$name        = self::LOCK_PREFIX . $name;
+		$locked_time = get_option( $name );
+		if ( $locked_time ) {
+			if ( microtime( true ) < $locked_time ) {
+				return false;
+			}
+		}
+		update_option( $name, microtime( true ) + $expiry );
+
+		return true;
+	}
+
+	/**
+	 * Remove the lock.
+	 *
+	 * @access public
+	 *
+	 * @param string $name lock name.
+	 */
+	public function remove( $name ) {
+		delete_option( self::LOCK_PREFIX . $name );
+	}
+}