From cc2c94ab7b87f4ae4a6eb132b7b28a64365134eb Mon Sep 17 00:00:00 2001
From: "q.linden" <devnull@localhost>
Date: Tue, 6 May 2008 13:45:59 -0400
Subject: [PATCH] [svn r111] add ready() method to event class, so you can tell
 in advance whether or not wait() is going to block.

---
 eventlet/coros.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/eventlet/coros.py b/eventlet/coros.py
index b26eab8..cef72f9 100644
--- a/eventlet/coros.py
+++ b/eventlet/coros.py
@@ -95,6 +95,14 @@ class event(object):
         self.epoch = time.time()
         self._result = NOT_USED
         self._waiters = {}
+        
+    def ready(self):
+        """ Return true if the wait() call will return immediately. 
+        Used to avoid waiting for things that might take a while to time out.
+        For example, you can put a bunch of events into a list, and then visit
+        them all repeatedly, calling ready() until one returns True, and then
+        you can wait() on that one."""
+        return self._result is not NOT_USED
 
     def wait(self):
         """Wait until another coroutine calls send.