From 899e10034959e2957d94ca13130a08298ccef7da Mon Sep 17 00:00:00 2001
From: Andrew Carter <andrewcarter1992@gmail.com>
Date: Wed, 23 Mar 2016 09:47:18 +0000
Subject: [PATCH] Added reference() and unreference()

---
 src/EventLoopInterface.php | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/EventLoopInterface.php b/src/EventLoopInterface.php
index 409ebdd..914bd5e 100644
--- a/src/EventLoopInterface.php
+++ b/src/EventLoopInterface.php
@@ -112,4 +112,27 @@ interface EventLoopDriver
      * @return void
      */
     public function cancel(string $eventIdentifier);
+
+    /**
+     * Reference an event.
+     * 
+     * This will keep the event loop alive whilst the event is still being monitored. Events have this state by default.
+     * 
+     * @param string $eventIdentifier The event identifier.
+     * 
+     * @return void
+     */
+     public function reference(string $eventIdentifier);
+
+    /**
+     * Unreference an event.
+     * 
+     * The event loop should exit the run method when only unreferenced events are still being monitored. Events are all
+     * referenced by default.
+     * 
+     * @param string $eventIdentifier The event identifier.
+     * 
+     * @return void
+     */
+     public function unreference(string $eventIdentifier);
 }