diff options
author | Micah Anderson <micah@riseup.net> | 2014-11-11 11:53:55 -0500 |
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committer | Micah Anderson <micah@riseup.net> | 2014-11-11 11:53:55 -0500 |
commit | 7d5c3dcd969161322deed6c43f8a6a3cb92c3369 (patch) | |
tree | 109b05c88c7252d7609ef324d62ef9dd7f06123f /zmq/eventloop/minitornado/platform/posix.py | |
parent | 44be832c5708baadd146cb954befbc3dcad8d463 (diff) |
upgrade to 14.4.1upstream/14.4.1
Diffstat (limited to 'zmq/eventloop/minitornado/platform/posix.py')
-rw-r--r-- | zmq/eventloop/minitornado/platform/posix.py | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/zmq/eventloop/minitornado/platform/posix.py b/zmq/eventloop/minitornado/platform/posix.py new file mode 100644 index 0000000..ccffbb6 --- /dev/null +++ b/zmq/eventloop/minitornado/platform/posix.py @@ -0,0 +1,70 @@ +#!/usr/bin/env python +# +# Copyright 2011 Facebook +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + +"""Posix implementations of platform-specific functionality.""" + +from __future__ import absolute_import, division, print_function, with_statement + +import fcntl +import os + +from . import interface + + +def set_close_exec(fd): + flags = fcntl.fcntl(fd, fcntl.F_GETFD) + fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC) + + +def _set_nonblocking(fd): + flags = fcntl.fcntl(fd, fcntl.F_GETFL) + fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK) + + +class Waker(interface.Waker): + def __init__(self): + r, w = os.pipe() + _set_nonblocking(r) + _set_nonblocking(w) + set_close_exec(r) + set_close_exec(w) + self.reader = os.fdopen(r, "rb", 0) + self.writer = os.fdopen(w, "wb", 0) + + def fileno(self): + return self.reader.fileno() + + def write_fileno(self): + return self.writer.fileno() + + def wake(self): + try: + self.writer.write(b"x") + except IOError: + pass + + def consume(self): + try: + while True: + result = self.reader.read() + if not result: + break + except IOError: + pass + + def close(self): + self.reader.close() + self.writer.close() |