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
|
# Copyright (c) 2015 Red Hat, Inc.
#
# 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.
import os
from ovsdbapp.backend.ovs_idl.common import base_connection_utils
class WaitQueue(base_connection_utils.WaitQueue):
def init_alert_notification(self):
alertpipe = os.pipe()
# NOTE(ivasilevskaya) python 3 doesn't allow unbuffered I/O.
# Will get around this constraint by using binary mode.
self.alertin = os.fdopen(alertpipe[0], 'rb', 0)
self.alertout = os.fdopen(alertpipe[1], 'wb', 0)
def alert_notification_consume(self):
self.alertin.read(1)
def alert_notify(self):
self.alertout.write('X'.encode("latin-1"))
self.alertout.flush()
@property
def alert_fileno(self):
return self.alertin.fileno()
|
