mirror of
https://mau.dev/maunium/synapse.git
synced 2024-06-22 12:38:23 +02:00
98 lines
2.9 KiB
Python
98 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2016 OpenMarket Ltd
|
|
#
|
|
# 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.
|
|
|
|
|
|
class _Entry(object):
|
|
__slots__ = ["end_key", "queue"]
|
|
|
|
def __init__(self, end_key):
|
|
self.end_key = end_key
|
|
self.queue = []
|
|
|
|
|
|
class WheelTimer(object):
|
|
"""Stores arbitrary objects that will be returned after their timers have
|
|
expired.
|
|
"""
|
|
|
|
def __init__(self, bucket_size=5000):
|
|
"""
|
|
Args:
|
|
bucket_size (int): Size of buckets in ms. Corresponds roughly to the
|
|
accuracy of the timer.
|
|
"""
|
|
self.bucket_size = bucket_size
|
|
self.entries = []
|
|
self.current_tick = 0
|
|
|
|
def insert(self, now, obj, then):
|
|
"""Inserts object into timer.
|
|
|
|
Args:
|
|
now (int): Current time in msec
|
|
obj (object): Object to be inserted
|
|
then (int): When to return the object strictly after.
|
|
"""
|
|
then_key = int(then / self.bucket_size) + 1
|
|
|
|
if self.entries:
|
|
min_key = self.entries[0].end_key
|
|
max_key = self.entries[-1].end_key
|
|
|
|
if then_key <= max_key:
|
|
# The max here is to protect against inserts for times in the past
|
|
self.entries[max(min_key, then_key) - min_key].queue.append(obj)
|
|
return
|
|
|
|
next_key = int(now / self.bucket_size) + 1
|
|
if self.entries:
|
|
last_key = self.entries[-1].end_key
|
|
else:
|
|
last_key = next_key
|
|
|
|
# Handle the case when `then` is in the past and `entries` is empty.
|
|
then_key = max(last_key, then_key)
|
|
|
|
# Add empty entries between the end of the current list and when we want
|
|
# to insert. This ensures there are no gaps.
|
|
self.entries.extend(
|
|
_Entry(key) for key in xrange(last_key, then_key + 1)
|
|
)
|
|
|
|
self.entries[-1].queue.append(obj)
|
|
|
|
def fetch(self, now):
|
|
"""Fetch any objects that have timed out
|
|
|
|
Args:
|
|
now (ms): Current time in msec
|
|
|
|
Returns:
|
|
list: List of objects that have timed out
|
|
"""
|
|
now_key = int(now / self.bucket_size)
|
|
|
|
ret = []
|
|
while self.entries and self.entries[0].end_key <= now_key:
|
|
ret.extend(self.entries.pop(0).queue)
|
|
|
|
return ret
|
|
|
|
def __len__(self):
|
|
l = 0
|
|
for entry in self.entries:
|
|
l += len(entry.queue)
|
|
return l
|