1 files changed, 60 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/client_id.hpp b/wsrep-lib/include/wsrep/client_id.hpp
new file mode 100644
index 00000000..f7597c88
--- /dev/null
+++ b/wsrep-lib/include/wsrep/client_id.hpp
@@ -0,0 +1,60 @@
+/*
+ * 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_CLIENT_ID_HPP
+#define WSREP_CLIENT_ID_HPP
+
+#include <ostream>
+#include <limits>
+
+namespace wsrep
+{
+    class client_id
+    {
+    public:
+        typedef unsigned long long type;
+        client_id()
+            : id_(std::numeric_limits<type>::max())
+        { }
+        template <typename I>
+        explicit client_id(I id)
+            : id_(static_cast<type>(id))
+        { }
+        type get() const { return id_; }
+        static type undefined() { return std::numeric_limits<type>::max(); }
+        bool operator<(const client_id& other) const
+        {
+            return (id_ < other.id_);
+        }
+        bool operator==(const client_id& other) const
+        {
+            return (id_ == other.id_);
+        }
+    private:
+        type id_;
+    };
+    static inline std::ostream& operator<<(
+        std::ostream& os, const wsrep::client_id& client_id)
+    {
+        return (os << client_id.get());
+    }
+}
+
+
+#endif // WSREP_CLIENT_ID_HPP