Make logger thread-safe

Author: fwolter

logger.cpp

@@ -23,8 +23,6 @@
 
 #include "logger.h"
 
-std::shared_ptr<cSoftHdLogger> cSoftHdLogger::instance;
-
 /*****************************************************************************
  * cSoftHdLogger class
  ****************************************************************************/
@@ -44,9 +42,7 @@ cSoftHdLogger::cSoftHdLogger(void)
  */
 std::shared_ptr<cSoftHdLogger> cSoftHdLogger::GetLogger()
 {
-	if (instance == nullptr)
-		instance = std::shared_ptr<cSoftHdLogger>(new cSoftHdLogger());
-
+	static std::shared_ptr<cSoftHdLogger> instance(new cSoftHdLogger());
 	return instance;
 }
 

logger.h

@@ -89,8 +89,7 @@ class cSoftHdLogger {
 	cSoftHdLogger(const cSoftHdLogger &) = delete;
 	cSoftHdLogger& operator=(const cSoftHdLogger &) = delete;
 
-	static std::shared_ptr<cSoftHdLogger> instance; ///< logger instance
-	int logLevel;                                   ///< loglevel (see Logger flags above)
+	int logLevel; ///< loglevel (see Logger flags above)
 };
 
 #endif