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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#ifndef CEPH_OSD_OBJECTVERSIONER_H
+#define CEPH_OSD_OBJECTVERSIONER_H
+
+class ObjectVersioner {
+ public:
+ pobject_t oid;
+
+ void get_versions(list<version_t>& ls);
+ version_t head(); // newest
+ version_t committed(); // last committed
+ version_t tail(); // oldest
+
+ /*
+ * prepare a new version, starting wit "raw" transaction t.
+ */
+ void prepare(ObjectStore::Transaction& t, version_t v);
+ void rollback_to(version_t v);
+ void commit_to(version_t v);
+};
+
+#endif