Added real graceful exit.

src/common/interfaces/ILogBackend.h

@@ -5,7 +5,8 @@
  * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
  * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
  * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
- * Copyright 2016-2018 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
  *
  *   This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -21,14 +22,17 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __ILOGBACKEND_H__
-#define __ILOGBACKEND_H__
+#ifndef XMRIG_ILOGBACKEND_H
+#define XMRIG_ILOGBACKEND_H
 
 
 #include <stdarg.h>
 #include <stddef.h>
 
 
+namespace xmrig {
+
+
 class ILogBackend
 {
 public:
@@ -46,11 +50,14 @@ public:
     constexpr static const size_t kBufferSize = 512;
 #   endif
 
-    virtual ~ILogBackend() {}
+    virtual ~ILogBackend() = default;
 
     virtual void message(Level level, const char* fmt, va_list args) = 0;
     virtual void text(const char* fmt, va_list args)                 = 0;
 };
 
 
-#endif // __ILOGBACKEND_H__
+} /* namespace xmrig */
+
+
+#endif // XMRIG_ILOGBACKEND_H