Limnoria/src/world.py

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###
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# Copyright (c) 2002-2005, Jeremiah Fincher
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# 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.
###
"""
Module for general worldly stuff, like global variables and whatnot.
"""
import gc
import os
import sys
import time
import atexit
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import select
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import threading
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import multiprocessing
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import re
from . import conf, drivers, ircutils, log, registry
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startedAt = time.time() # Just in case it doesn't get set later.
starting = False
mainThread = threading.currentThread()
def isMainThread():
return mainThread is threading.currentThread()
threadsSpawned = 1 # Starts at one for the initial "thread."
class SupyThread(threading.Thread):
def __init__(self, *args, **kwargs):
global threadsSpawned
threadsSpawned += 1
super(SupyThread, self).__init__(*args, **kwargs)
log.debug('Spawning thread %q.', self.getName())
processesSpawned = 1 # Starts at one for the initial process.
class SupyProcess(multiprocessing.Process):
def __init__(self, *args, **kwargs):
global processesSpawned
processesSpawned += 1
super(SupyProcess, self).__init__(*args, **kwargs)
log.debug('Spawning process %q.', self.name)
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if sys.version_info[0:3] == (3, 3, 1) and hasattr(select, 'poll'):
# http://bugs.python.org/issue17707
import multiprocessing.connection
def _poll(fds, timeout):
if timeout is not None:
timeout = int(timeout * 1000) # timeout is in milliseconds
fd_map = {}
pollster = select.poll()
for fd in fds:
pollster.register(fd, select.POLLIN)
if hasattr(fd, 'fileno'):
fd_map[fd.fileno()] = fd
else:
fd_map[fd] = fd
ls = []
for fd, event in pollster.poll(timeout):
if event & select.POLLNVAL:
raise ValueError('invalid file descriptor %i' % fd)
ls.append(fd_map[fd])
return ls
multiprocessing.connection._poll = _poll
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commandsProcessed = 0
ircs = [] # A list of all the IRCs.
def getIrc(network):
network = network.lower()
for irc in ircs:
if irc.network.lower() == network:
return irc
return None
def _flushUserData():
userdataFilename = os.path.join(conf.supybot.directories.conf(),
'userdata.conf')
registry.close(conf.users, userdataFilename)
flushers = [_flushUserData] # A periodic function will flush all these.
registryFilename = None
def flush():
"""Flushes all the registered flushers."""
for (i, f) in enumerate(flushers):
try:
f()
except Exception as e:
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log.exception('Uncaught exception in flusher #%s (%s):', i, f)
def debugFlush(s=''):
if conf.supybot.debug.flushVeryOften():
if s:
log.debug(s)
flush()
def upkeep():
"""Does upkeep (like flushing, garbage collection, etc.)"""
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# Just in case, let's clear the exception info.
try:
sys.exc_clear()
except AttributeError:
# Python 3 does not have sys.exc_clear. The except statement clears
# the info itself (and we've just entered an except statement)
pass
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if os.name == 'nt':
try:
import msvcrt
msvcrt.heapmin()
except ImportError:
pass
except IOError: # Win98 sux0rs!
pass
if conf.daemonized:
# If we're daemonized, sys.stdout has been replaced with a StringIO
# object, so let's see if anything's been printed, and if so, let's
# log.warning it (things shouldn't be printed, and we're more likely
# to get bug reports if we make it a warning).
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if not hasattr(sys.stdout, 'getvalue'):
# Stupid twisted sometimes replaces our stdout with theirs, because
# "The Twisted Way Is The Right Way" (ha!). So we're stuck simply
# returning.
log.warning('Expected cStringIO as stdout, got %r.', sys.stdout)
return
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s = sys.stdout.getvalue()
if s:
log.warning('Printed to stdout after daemonization: %s', s)
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sys.stdout.seek(0)
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sys.stdout.truncate() # Truncates to current offset.
s = sys.stderr.getvalue()
if s:
log.error('Printed to stderr after daemonization: %s', s)
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sys.stderr.seek(0)
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sys.stderr.truncate() # Truncates to current offset.
doFlush = conf.supybot.flush() and not starting
if doFlush:
flush()
# This is so registry._cache gets filled.
# This seems dumb, so we'll try not doing it anymore.
#if registryFilename is not None:
# registry.open(registryFilename)
if not dying:
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if sys.version_info[0] < 3:
log.debug('Regexp cache size: %s', len(re._cache))
log.debug('Pattern cache size: %s', len(ircutils._patternCache))
log.debug('HostmaskPatternEqual cache size: %s',
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len(ircutils._hostmaskPatternEqualCache))
#timestamp = log.timestamp()
if doFlush:
log.info('Flushers flushed and garbage collected.')
else:
log.info('Garbage collected.')
collected = gc.collect()
if gc.garbage:
log.warning('Noncollectable garbage (file this as a bug on SF.net): %s',
gc.garbage)
return collected
def makeDriversDie():
"""Kills drivers."""
log.info('Killing Driver objects.')
for driver in drivers._drivers.itervalues():
driver.die()
def makeIrcsDie():
"""Kills Ircs."""
log.info('Killing Irc objects.')
for irc in ircs[:]:
if not irc.zombie:
irc.die()
else:
log.debug('Not killing %s, it\'s already a zombie.', irc)
def startDying():
"""Starts dying."""
log.info('Shutdown initiated.')
global dying
dying = True
def finished():
log.info('Shutdown complete.')
# These are in order; don't reorder them for cosmetic purposes. The order
# in which they're registered is the reverse order in which they will run.
atexit.register(finished)
atexit.register(upkeep)
atexit.register(makeIrcsDie)
atexit.register(makeDriversDie)
atexit.register(startDying)
##################################################
##################################################
##################################################
## Don't even *think* about messing with these. ##
##################################################
##################################################
##################################################
dying = False
testing = False
starting = False
profiling = False
documenting = False
# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: