1 files changed, 63 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/transaction_id.hpp b/wsrep-lib/include/wsrep/transaction_id.hpp
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+++ b/wsrep-lib/include/wsrep/transaction_id.hpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2018 Codership Oy <info@codership.com>
+ *
+ * This file is part of wsrep-lib.
+ *
+ * Wsrep-lib 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Wsrep-lib 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 wsrep-lib.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef WSREP_TRANSACTION_ID_HPP
+#define WSREP_TRANSACTION_ID_HPP
+
+#include <iostream>
+#include <limits>
+
+namespace wsrep
+{
+    class transaction_id
+    {
+    public:
+        typedef unsigned long long type;
+
+
+        transaction_id()
+            : id_(std::numeric_limits<type>::max())
+        { }
+
+        template <typename I>
+        explicit transaction_id(I id)
+            : id_(static_cast<type>(id))
+        { }
+        type get() const { return id_; }
+        static transaction_id undefined() { return transaction_id(-1); }
+        bool is_undefined() const { return (id_ == type(-1)); }
+        bool operator<(const transaction_id& other) const
+        {
+            return (id_ < other.id_);
+        }
+        bool operator==(const transaction_id& other) const
+        { return (id_ == other.id_); }
+        bool operator!=(const transaction_id& other) const
+        { return (id_ != other.id_); }
+    private:
+        type id_;
+    };
+
+    static inline std::ostream& operator<<(std::ostream& os, transaction_id id)
+    {
+        return (os << id.get());
+    }
+}
+
+#endif // WSREP_TRANSACTION_ID_HPP