-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
+#
+# 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 version 2 as
+# published by the Free Software Foundation;
+#
+# 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 <http://www.gnu.org/licenses/>.
+#
+# Author: Alina Quereilhac <alina.quereilhac@inria.fr>
+# FIXME: This class is not thread-safe.
+# Should it be made thread-safe?
class GuidGenerator(object):
- def __init__(self, guid = 0):
- self._last_guid = guid
+ def __init__(self):
+ self._last_guid = 0
- def next(self):
- self._last_guid += 1
- return self._last_guid
+ 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