Limnoria/src/world.py

#!/usr/bin/env python

###
# Copyright (c) 2002-2004, Jeremiah Fincher
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# modification, are permitted provided that the following conditions are met:
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#     this list of conditions, and the following disclaimer.
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###

"""
Module for general worldly stuff, like global variables and whatnot.
"""

__revision__ = "$Id$"

import supybot.fix as fix

import gc
import os
import sys
import sre
import time
import atexit
import threading

import supybot.log as log
import supybot.conf as conf
import supybot.drivers as drivers
import supybot.ircutils as ircutils
import supybot.registry as registry
import supybot.schedule as schedule

startedAt = time.time() # Just in case it doesn't get set later.

starting = False

mainThread = threading.currentThread()
assert 'MainThread' in repr(mainThread)

threadsSpawned = 1 # Starts at one for the initial "thread."
commandsProcessed = 0

ircs = [] # A list of all the IRCs.

def _flushUserData():
    userdataFilename = os.path.join(conf.supybot.directories.conf(),
                                    'userdata.conf')
    registry.close(conf.users, userdataFilename, annotated=False)

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, e:
            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(scheduleNext=True):
    """Does upkeep (like flushing, garbage collection, etc.)"""
    sys.exc_clear() # Just in case, let's clear the exception info.
    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).
        assert not type(sys.stdout) == file, 'Not a StringIO object!'
        s = sys.stdout.getvalue()
        if s:
            log.warning('Printed to stdout after daemonization: %s', s)
            sys.stdout.reset() # Seeks to 0.
            sys.stdout.truncate() # Truncates to current offset.
        assert not type(sys.stderr) == file, 'Not a StringIO object!'
        s = sys.stderr.getvalue()
        if s:
            log.error('Printed to stderr after daemonization: %s', s)
            sys.stderr.reset() # Seeks to 0.
            sys.stderr.truncate() # Truncates to current offset.
    flushed = conf.supybot.flush() and not starting
    if flushed:
        flush()
        # This is so registry._cache gets filled.
        if registryFilename is not None:
            registry.open(registryFilename)
    if not dying:
        log.debug('Regexp cache size: %s', len(sre._cache))
        log.debug('Pattern cache size: %s'%len(ircutils._patternCache))
        log.debug('HostmaskPatternEqual cache size: %s' %
                  len(ircutils._hostmaskPatternEqualCache))
        #timestamp = log.timestamp()
        if flushed:
            log.info('Flushers flushed and garbage collected.')
        else:
            log.info('Garbage collected.')
    if scheduleNext:
        schedule.addEvent(upkeep, time.time() + conf.supybot.upkeepInterval())
    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[:]:
        irc.die()

def startDying():
    """Starts dying."""
    log.info('Shutdown initiated.')
    global dying
    dying = True

def finished():
    log.info('Shutdown complete.')

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


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