You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
10 years ago
|
#!/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.
|
||
|
|
|
||
|
|
"""Interfaces for platform-specific functionality.
|
||
|
|
|
||
|
|
This module exists primarily for documentation purposes and as base classes
|
||
|
|
for other tornado.platform modules. Most code should import the appropriate
|
||
|
|
implementation from `tornado.platform.auto`.
|
||
|
|
"""
|
||
|
|
|
||
|
|
from __future__ import absolute_import, division, print_function, with_statement
|
||
|
|
|
||
|
|
|
||
|
|
def set_close_exec(fd):
|
||
|
|
"""Sets the close-on-exec bit (``FD_CLOEXEC``)for a file descriptor."""
|
||
|
|
raise NotImplementedError()
|
||
|
|
|
||
|
|
|
||
|
|
class Waker(object):
|
||
|
|
"""A socket-like object that can wake another thread from ``select()``.
|
||
|
|
|
||
|
|
The `~tornado.ioloop.IOLoop` will add the Waker's `fileno()` to
|
||
|
|
its ``select`` (or ``epoll`` or ``kqueue``) calls. When another
|
||
|
|
thread wants to wake up the loop, it calls `wake`. Once it has woken
|
||
|
|
up, it will call `consume` to do any necessary per-wake cleanup. When
|
||
|
|
the ``IOLoop`` is closed, it closes its waker too.
|
||
|
|
"""
|
||
|
|
def fileno(self):
|
||
|
|
"""Returns the read file descriptor for this waker.
|
||
|
|
|
||
|
|
Must be suitable for use with ``select()`` or equivalent on the
|
||
|
|
local platform.
|
||
|
|
"""
|
||
|
|
raise NotImplementedError()
|
||
|
|
|
||
|
|
def write_fileno(self):
|
||
|
|
"""Returns the write file descriptor for this waker."""
|
||
|
|
raise NotImplementedError()
|
||
|
|
|
||
|
|
def wake(self):
|
||
|
|
"""Triggers activity on the waker's file descriptor."""
|
||
|
|
raise NotImplementedError()
|
||
|
|
|
||
|
|
def consume(self):
|
||
|
|
"""Called after the listen has woken up to do any necessary cleanup."""
|
||
|
|
raise NotImplementedError()
|
||
|
|
|
||
|
|
def close(self):
|
||
|
|
"""Closes the waker's file descriptor(s)."""
|
||
|
|
raise NotImplementedError()
|