From dd45026300e6c43c309398ab983abc945f0a994b Mon Sep 17 00:00:00 2001
From: MinRK <benjaminrk@gmail.com>
Date: Fri, 21 Mar 2014 10:59:25 -0700
Subject: [PATCH] add IOLoop.clear_instance

like clear_current, but for the global IOLoop instance
---
 tornado/ioloop.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tornado/ioloop.py b/tornado/ioloop.py
index 80496e193..421bf8766 100644
--- a/tornado/ioloop.py
+++ b/tornado/ioloop.py
@@ -157,6 +157,12 @@ class IOLoop(Configurable):
         assert not IOLoop.initialized()
         IOLoop._instance = self
 
+    @staticmethod
+    def clear_instance():
+        """Clear the global `IOLoop` instance."""
+        if hasattr(IOLoop, "_instance"):
+            del IOLoop._instance
+
     @staticmethod
     def current():
         """Returns the current thread's `IOLoop`.
-- 
2.47.2