Changed project name to wsrep-lib.

include/wsrep/logger.hpp

@@ -0,0 +1,49 @@
+//
+// Copyright (C) 2018 Codership Oy <info@codership.com>
+//
+
+#ifndef WSREP_LOGGER_HPP
+#define WSREP_LOGGER_HPP
+
+#include "mutex.hpp"
+#include "lock.hpp"
+
+#include <iosfwd>
+#include <sstream>
+
+namespace wsrep
+{
+    class log
+    {
+    public:
+        log(const std::string& prefix = "INFO")
+            : prefix_(prefix)
+            , oss_()
+        { }
+        ~log()
+        {
+            wsrep::unique_lock<wsrep::mutex> lock(mutex_);
+            os_ << prefix_ << ": " << oss_.str() << "\n";
+        }
+        template <typename T>
+        std::ostream& operator<<(const T& val)
+        {
+            return (oss_ << val);
+        }
+    private:
+        const std::string prefix_;
+        std::ostringstream oss_;
+        static wsrep::mutex& mutex_;
+        static std::ostream& os_;
+    };
+
+
+    class log_debug : public log
+    {
+    public:
+        log_debug()
+            : log("DEBUG") { }
+    };
+}
+
+#endif // WSREP_LOGGER_HPP