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# Locking debugging code -- temporary
# Copyright (C) 2003-2015 John Goerzen & contributors
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
from threading import Lock, currentThread
import traceback
logfile = open("/tmp/logfile", "wt")
loglock = Lock()
class DebuggingLock:
def __init__(self, name):
self.lock = Lock()
self.name = name
def acquire(self, blocking=1):
self.print_tb("Acquire lock")
self.lock.acquire(blocking)
self.logmsg("===== %s: Thread %s acquired lock\n" %
(self.name, currentThread().getName()))
def release(self):
self.print_tb("Release lock")
self.lock.release()
def logmsg(self, msg):
loglock.acquire()
logfile.write(msg + "\n")
logfile.flush()
loglock.release()
def print_tb(self, msg):
self.logmsg(".... %s: Thread %s attempting to %s\n" %
(self.name, currentThread().getName(), msg) +
"\n".join(traceback.format_list(traceback.extract_stack())))
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