From: Thomas Heller <theller@ctypes.org>
Date: Tue, 24 Sep 2002 17:30:31 +0000 (+0000)
Subject: On Windows, select() does not accept empty lists.
X-Git-Tag: v2.3c1~3993
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d8ce87ad84d748fb648b874d7dd9d9a3a835ec3d;p=python

On Windows, select() does not accept empty lists.
Patch suggested by Guido, fixes SF item 611464.

Bugfix candidate, will backport to release22-maint myself.
---

diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index 5ab62255fa..abbbae69ad 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -50,6 +50,7 @@ import exceptions
 import select
 import socket
 import sys
+import time
 
 import os
 from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, \
@@ -100,11 +101,14 @@ def poll(timeout=0.0, map=None):
                 r.append(fd)
             if obj.writable():
                 w.append(fd)
-        try:
-            r, w, e = select.select(r, w, e, timeout)
-        except select.error, err:
-            if err[0] != EINTR:
-                raise
+        if [] == r == w == e:
+            time.sleep(timeout)
+        else:
+            try:
+                r, w, e = select.select(r, w, e, timeout)
+            except select.error, err:
+                if err[0] not in (EINTR, ENOENT):
+                    raise
 
         for fd in r:
             obj = map.get(fd)