#
# NEPI, a framework to manage network experiments
# Copyright (C) 2013 INRIA
#
# 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 3 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, see .
#
# Author: Alina Quereilhac
# FIXME: This class is not thread-safe.
# Should it be made thread-safe?
class GuidGenerator(object):
def __init__(self):
self._last_guid = 0
def next(self, guid = None):
if guid == None:
guid = self._last_guid + 1
self._last_guid = self._last_guid if guid <= self._last_guid else guid
return guid