linkchecker/linkcheck/lock.py
2006-09-15 11:30:55 +00:00

56 lines
1.8 KiB
Python

# -*- coding: iso-8859-1 -*-
# Copyright (C) 2005-2006 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
"""
Locking utility class.
"""
import threading
import linkcheck
import log
def get_lock (name):
return threading.Lock()
# for thread debugging, use the DebugLock wrapper
#return DebugLock(threading.Lock(), name)
class DebugLock (object):
"""
Debugging lock class.
"""
def __init__ (self, lock, name):
self.lock = lock
self.name = name
def acquire (self, blocking=1):
"""
Acquire lock.
"""
threadname = threading.currentThread().getName()
assert None == log.debug(linkcheck.LOG_THREAD,
"Acquire %s for %s", self.name, threadname)
self.lock.acquire(blocking)
assert None == log.debug(linkcheck.LOG_THREAD,
"...acquired %s for %s", self.name, threadname)
def release (self):
"""
Release lock.
"""
threadname = threading.currentThread().getName()
assert None == log.debug(linkcheck.LOG_THREAD,
"Release %s for %s", self.name, threadname)
self.lock.release()