From 985b68e611e5902bd21ce3159e849b2dcd370afb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Giampaolo=20Rodol=C3=A0?= <g.rodola@gmail.com>
Date: Wed, 15 Sep 2010 21:43:47 +0000
Subject: [PATCH] Store all errors signaling a disconnection into a global
 frozenset to save some computation time on recv() and send().

---
 Lib/asyncore.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index edb1c7bf501..fbbee29bc3b 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -56,6 +56,8 @@ import os
 from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL, \
      ENOTCONN, ESHUTDOWN, EINTR, EISCONN, EBADF, ECONNABORTED, errorcode
 
+DISCONNECTED = frozenset((ECONNRESET, ENOTCONN, ESHUTDOWN, ECONNABORTED))
+
 try:
     socket_map
 except NameError:
@@ -364,7 +366,7 @@ class dispatcher:
         except socket.error as why:
             if why.args[0] == EWOULDBLOCK:
                 return 0
-            elif why.args[0] in (ECONNRESET, ENOTCONN, ESHUTDOWN, ECONNABORTED):
+            elif why.args[0] in DISCONNECTED:
                 self.handle_close()
                 return 0
             else:
@@ -382,7 +384,7 @@ class dispatcher:
                 return data
         except socket.error as why:
             # winsock sometimes throws ENOTCONN
-            if why.args[0] in [ECONNRESET, ENOTCONN, ESHUTDOWN, ECONNABORTED]:
+            if why.args[0] in DISCONNECTED:
                 self.handle_close()
                 return b''
             else: