fix bug spotted by @daks with mercurial. Also fix concurrency on async.

gunicorn/async/base.py

@@ -102,7 +102,7 @@ class KeepaliveWorker(Worker):
 
     def run(self):
         self.init_process()
-        self.socket.setblocking(0)
+        self.socket.setblocking(1)
 
         while self.alive:
             self.notify()

gunicorn/async/eventlet_server.py

@@ -3,6 +3,8 @@
 # This file is part of gunicorn released under the MIT license. 
 # See the NOTICE for more information.
 
+from __future__ import with_statement
+
 import errno
 
 import collections
@@ -11,6 +13,7 @@ from eventlet.green import os
 from eventlet.green import socket
 from eventlet import greenio
 from eventlet.hubs import trampoline
+from eventlet.timeout import Timeout
 
 from gunicorn import util
 from gunicorn import arbiter
@@ -24,6 +27,7 @@ class EventletWorker(KeepaliveWorker):
         self.pool = eventlet.GreenPool(self.worker_connections)
   
     def accept(self):
+        with Timeout(0.1, False):
             try:
                 client, addr = self.socket.accept()
                 self.pool.spawn_n(self.handle, client, addr)

gunicorn/async/gevent_server.py

@@ -3,16 +3,16 @@
 # This file is part of gunicorn released under the MIT license. 
 # See the NOTICE for more information.
 
+from __future__ import with_statement
 
 import errno
 import os
 
 import gevent
-from gevent import socket
+from gevent import Timeout, socket
 from gevent.greenlet import Greenlet
 from gevent.pool import Pool
 
-
 from gunicorn import arbiter
 from gunicorn import util
 from gunicorn.async.base import KeepaliveWorker
@@ -24,6 +24,7 @@ class GEventWorker(KeepaliveWorker):
         self.pool = Pool(self.worker_connections)
         
     def accept(self):
+        with Timeout(0.1, False):
             try:
                 client, addr = self.socket.accept()
                 self.pool.spawn(self.handle, client, addr)