Index: src/libchcore/TSubTaskBase.h
===================================================================
diff -u -N -r20aff533ab239b5b41263bb342879b4ea46fdbf6 -r12a1725bfd04b0f55fd0fda302975fdcd4174943
--- src/libchcore/TSubTaskBase.h	(.../TSubTaskBase.h)	(revision 20aff533ab239b5b41263bb342879b4ea46fdbf6)
+++ src/libchcore/TSubTaskBase.h	(.../TSubTaskBase.h)	(revision 12a1725bfd04b0f55fd0fda302975fdcd4174943)
@@ -64,12 +64,17 @@
 	TSubTaskBase(TSubTaskContext& rContext);
 	virtual ~TSubTaskBase();
 
+	virtual void Reset() = 0;
+
 	virtual ESubOperationResult Exec() = 0;
 	virtual ESubOperationType GetSubOperationType() const = 0;
 
+	// progress
 	virtual TSubTaskProgressInfo& GetProgressInfo() = 0;
-	virtual const TSubTaskStatsInfo& GetStatsInfo() const { return m_tSubTaskStats; }
 
+	// stats
+	virtual void GetStatsSnapshot(TSubTaskStatsSnapshot& rStats) const = 0;
+
 protected:
 	// some common operations
 	TSubTaskContext& GetContext() { return m_rContext; }
@@ -82,9 +87,6 @@
 	TSubTaskBase(const TSubTaskBase&);
 	TSubTaskBase& operator=(const TSubTaskBase&);
 
-protected:
-	TSubTaskStatsInfo m_tSubTaskStats;
-
 private:
 	TSubTaskContext& m_rContext;
 };