Singleton.py

Go to the documentation of this file.

#/usr/bin/env python
# -*- coding: euc-jp -*-



import thread


class Singleton(object):
  __lockObj = thread.allocate_lock()
  __instance = None

  def __new__(self, *args, **kargs):
    return self.instance(*args, **kargs)


  def __init__(self, *args, **kargs):
    self.instance(*args, **kargs)


  def instance(self, *args, **kargs):
    self.__lockObj.acquire()
    try:
      if self.__instance is None:
        self.__instance = object.__new__(self, *args, **kargs)

    finally:
      self.__lockObj.release()

    return self.__instance

  instance = classmethod(instance)