code.delx.au - offlineimap/blob - offlineimap/ui/debuglock.py

   1 # Locking debugging code -- temporary
   2 # Copyright (C) 2003 John Goerzen
   3 # <jgoerzen@complete.org>
   4 #
   5 #    This program is free software; you can redistribute it and/or modify
   6 #    it under the terms of the GNU General Public License as published by
   7 #    the Free Software Foundation; either version 2 of the License, or
   8 #    (at your option) any later version.
   9 #
  10 #    This program is distributed in the hope that it will be useful,
  11 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 #    GNU General Public License for more details.
  14 #
  15 #    You should have received a copy of the GNU General Public License
  16 #    along with this program; if not, write to the Free Software
  17 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18
  19 from threading import *
  20 import traceback
  21 logfile = open("/tmp/logfile", "wt")
  22 loglock = Lock()
  23
  24 class DebuggingLock:
  25     def __init__(self, name):
  26         self.lock = Lock()
  27         self.name = name
  28
  29     def acquire(self, blocking = 1):
  30         self.print_tb("Acquire lock")
  31         self.lock.acquire(blocking)
  32         self.logmsg("===== %s: Thread %s acquired lock\n" % (self.name, currentThread().getName()))
  33
  34     def release(self):
  35         self.print_tb("Release lock")
  36         self.lock.release()
  37
  38     def logmsg(self, msg):
  39         loglock.acquire()
  40         logfile.write(msg + "\n")
  41         logfile.flush()
  42         loglock.release()
  43
  44     def print_tb(self, msg):
  45         self.logmsg(".... %s: Thread %s attempting to %s\n" % \
  46                     (self.name, currentThread().getName(), msg) + \
  47                     "\n".join(traceback.format_list(traceback.extract_stack())))
  48
  49