Limnoria/src/schedule.py

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2003-03-12 07:26:59 +01:00
#!/usr/bin/env python
###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
from fix import *
import time
import bisect
import drivers
class Schedule(drivers.IrcDriver):
def __init__(self):
drivers.IrcDriver.__init__(self)
self.schedule = []
self.events = {}
self.counter = 0
def addEvent(self, f, t, name=None):
if name is None:
name = self.counter
self.counter += 1
elif type(name) == int:
raise ValueError, 'int names are reserved for the scheduler.'
#debug.printf('Added event to schedule: %s' % name)
assert name not in self.events
self.events[name] = f
bisect.insort(self.schedule, (t, name))
def removeEvent(self, name):
del self.events[name]
self.schedule = [(t, n) for (t, n) in self.schedule if n != name]
def addPeriodicEvent(self, f, t, name=None):
# Note that you can't name a periodic event -- it'll be erased after
# it's been run only once.
def wrapper():
f()
self.addEvent(wrapper, time.time() + t, name)
wrapper()
removePeriodicEvent = removeEvent
def run(self):
#debug.printf(`(time.time(), self.schedule)`)
while self.schedule and self.schedule[0][0] < time.time():
(t, name) = self.schedule.pop(0)
self.events[name]()
del self.events[name]
try:
ignore(schedule)
except NameError:
schedule = Schedule()
addEvent = schedule.addEvent
removeEvent = schedule.removeEvent
addPeriodicEvent = schedule.addPeriodicEvent
removePeriodicEvent = removeEvent
run = schedule.run
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: