Index: src/libchcore/TSubTaskBase.h
===================================================================
diff -u -N -rd88274a4bbfd4ef005d44c4d179b7596cb627486 -rbebda797ec6983535a8940f8f9f15453fe6b1785
--- src/libchcore/TSubTaskBase.h	(.../TSubTaskBase.h)	(revision d88274a4bbfd4ef005d44c4d179b7596cb627486)
+++ src/libchcore/TSubTaskBase.h	(.../TSubTaskBase.h)	(revision bebda797ec6983535a8940f8f9f15453fe6b1785)
@@ -36,6 +36,17 @@
 ///////////////////////////////////////////////////////////////////////////
 // TSubTaskBase
 
+class LIBCHCORE_API TSubTaskProgressInfo
+{
+public:
+	virtual ~TSubTaskProgressInfo() {}
+
+	virtual void Serialize(TReadBinarySerializer& rSerializer) = 0;
+	virtual void Serialize(TWriteBinarySerializer& rSerializer) const = 0;
+
+	virtual void ResetProgress() = 0;
+};
+
 class LIBCHCORE_API TSubTaskBase
 {
 public:
@@ -55,6 +66,8 @@
 	virtual ESubOperationResult Exec() = 0;
 	virtual ESubOperationType GetSubOperationType() const = 0;
 
+	virtual TSubTaskProgressInfo& GetProgressInfo() = 0;
+
 	TSubTaskContext& GetContext() { return m_rContext; }
 	const TSubTaskContext& GetContext() const { return m_rContext; }