summaryrefslogtreecommitdiffstats
path: root/external_libs/python/zmq/eventloop/minitornado/platform/common.py
diff options
context:
space:
mode:
Diffstat (limited to 'external_libs/python/zmq/eventloop/minitornado/platform/common.py')
-rw-r--r--external_libs/python/zmq/eventloop/minitornado/platform/common.py91
1 files changed, 0 insertions, 91 deletions
diff --git a/external_libs/python/zmq/eventloop/minitornado/platform/common.py b/external_libs/python/zmq/eventloop/minitornado/platform/common.py
deleted file mode 100644
index 2d75dc1e..00000000
--- a/external_libs/python/zmq/eventloop/minitornado/platform/common.py
+++ /dev/null
@@ -1,91 +0,0 @@
-"""Lowest-common-denominator implementations of platform functionality."""
-from __future__ import absolute_import, division, print_function, with_statement
-
-import errno
-import socket
-
-from . import interface
-
-
-class Waker(interface.Waker):
- """Create an OS independent asynchronous pipe.
-
- For use on platforms that don't have os.pipe() (or where pipes cannot
- be passed to select()), but do have sockets. This includes Windows
- and Jython.
- """
- def __init__(self):
- # Based on Zope async.py: http://svn.zope.org/zc.ngi/trunk/src/zc/ngi/async.py
-
- self.writer = socket.socket()
- # Disable buffering -- pulling the trigger sends 1 byte,
- # and we want that sent immediately, to wake up ASAP.
- self.writer.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
-
- count = 0
- while 1:
- count += 1
- # Bind to a local port; for efficiency, let the OS pick
- # a free port for us.
- # Unfortunately, stress tests showed that we may not
- # be able to connect to that port ("Address already in
- # use") despite that the OS picked it. This appears
- # to be a race bug in the Windows socket implementation.
- # So we loop until a connect() succeeds (almost always
- # on the first try). See the long thread at
- # http://mail.zope.org/pipermail/zope/2005-July/160433.html
- # for hideous details.
- a = socket.socket()
- a.bind(("127.0.0.1", 0))
- a.listen(1)
- connect_address = a.getsockname() # assigned (host, port) pair
- try:
- self.writer.connect(connect_address)
- break # success
- except socket.error as detail:
- if (not hasattr(errno, 'WSAEADDRINUSE') or
- detail[0] != errno.WSAEADDRINUSE):
- # "Address already in use" is the only error
- # I've seen on two WinXP Pro SP2 boxes, under
- # Pythons 2.3.5 and 2.4.1.
- raise
- # (10048, 'Address already in use')
- # assert count <= 2 # never triggered in Tim's tests
- if count >= 10: # I've never seen it go above 2
- a.close()
- self.writer.close()
- raise socket.error("Cannot bind trigger!")
- # Close `a` and try again. Note: I originally put a short
- # sleep() here, but it didn't appear to help or hurt.
- a.close()
-
- self.reader, addr = a.accept()
- self.reader.setblocking(0)
- self.writer.setblocking(0)
- a.close()
- self.reader_fd = self.reader.fileno()
-
- def fileno(self):
- return self.reader.fileno()
-
- def write_fileno(self):
- return self.writer.fileno()
-
- def wake(self):
- try:
- self.writer.send(b"x")
- except (IOError, socket.error):
- pass
-
- def consume(self):
- try:
- while True:
- result = self.reader.recv(1024)
- if not result:
- break
- except (IOError, socket.error):
- pass
-
- def close(self):
- self.reader.close()
- self.writer.close()