mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-28 12:30:00 +00:00
71 lines
1.8 KiB
Python
71 lines
1.8 KiB
Python
|
#!/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 tornado.platform 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()
|