/usr/lib/python2.7/dist-packages/gevent/select.py is in python-gevent 1.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | # Copyright (c) 2009-2011 Denis Bilenko. See LICENSE for details.
from __future__ import absolute_import
import sys
from gevent.timeout import Timeout
from gevent.event import Event
from gevent.hub import get_hub
__implements__ = ['select']
__all__ = ['error'] + __implements__
import select as __select__
error = __select__.error
def get_fileno(obj):
try:
fileno_f = obj.fileno
except AttributeError:
if not isinstance(obj, (int, long)):
raise TypeError('argument must be an int, or have a fileno() method: %r' % (obj, ))
return obj
else:
return fileno_f()
class SelectResult(object):
__slots__ = ['read', 'write', 'event']
def __init__(self):
self.read = []
self.write = []
self.event = Event()
def add_read(self, socket):
self.read.append(socket)
self.event.set()
def add_write(self, socket):
self.write.append(socket)
self.event.set()
def select(rlist, wlist, xlist, timeout=None):
"""An implementation of :meth:`select.select` that blocks only the current greenlet.
Note: *xlist* is ignored.
"""
watchers = []
loop = get_hub().loop
io = loop.io
MAXPRI = loop.MAXPRI
result = SelectResult()
try:
try:
for readfd in rlist:
watcher = io(get_fileno(readfd), 1)
watcher.priority = MAXPRI
watcher.start(result.add_read, readfd)
watchers.append(watcher)
for writefd in wlist:
watcher = io(get_fileno(writefd), 2)
watcher.priority = MAXPRI
watcher.start(result.add_write, writefd)
watchers.append(watcher)
except IOError:
ex = sys.exc_info()[1]
raise error(*ex.args)
result.event.wait(timeout=timeout)
return result.read, result.write, []
finally:
for watcher in watchers:
watcher.stop()
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