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diff --git a/tools/lldb-mi/MICmnStreamStdin.h b/tools/lldb-mi/MICmnStreamStdin.h
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index 000000000000..edd79f60b8d4
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+++ b/tools/lldb-mi/MICmnStreamStdin.h
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+//===-- MIUtilStreamStdin.h -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+//++
+// File:		MIUtilStreamStdin.h
+//
+// Overview:	CMICmnStreamStdin interface.
+//
+// Environment:	Compilers:	Visual C++ 12.
+//							gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
+//				Libraries:	See MIReadmetxt. 
+//
+// Copyright:	None.
+//--
+
+#pragma once
+
+// In-house headers:
+#include "MIUtilString.h"
+#include "MIUtilThreadBaseStd.h"
+#include "MICmnBase.h"
+#include "MIUtilSingletonBase.h"
+
+//++ ============================================================================
+// Details:	MI common code class. Used to handle stream data from Stdin.
+//			Singleton class using the Visitor pattern. A driver using the interface
+//			provide can receive callbacks when a new line of data is received.
+//			Each line is determined by a carriage return.
+//			A singleton class.
+// Gotchas:	None.
+// Authors:	Illya Rudkin 10/02/2014.
+// Changes:	Factored out OS specific handling of reading stdin	- IOR 16/06/2014.
+//--
+class CMICmnStreamStdin
+:	public CMICmnBase
+,	public CMIUtilThreadActiveObjBase
+,	public MI::ISingleton< CMICmnStreamStdin >
+{
+	// Give singleton access to private constructors
+	friend MI::ISingleton< CMICmnStreamStdin >;
+
+// Class:
+public:
+	//++
+	// Description: Visitor pattern. Driver(s) use this interface to get a callback
+	//				on each new line of data received from stdin.
+	//--
+	class IStreamStdin
+	{
+	public:
+		virtual bool ReadLine( const CMIUtilString & vStdInBuffer, bool & vrwbYesExit ) = 0;
+
+		/* dtor */ virtual ~IStreamStdin( void ) {};
+	};
+
+	//++
+	// Description: Specific OS stdin handling implementations are created and used by *this
+	//				class. Seperates out functionality and enables handler to be set 
+	//				dynamically depended on the OS detected. 
+	//--
+	class IOSStdinHandler
+	{
+	public:
+		virtual bool			InputAvailable( bool & vwbAvail ) = 0;
+		virtual const MIchar *	ReadLine( CMIUtilString & vwErrMsg ) = 0;
+
+		/* dtor */ virtual ~IOSStdinHandler( void ) {};
+	};
+		
+// Methods:
+public:
+	bool	Initialize( void );
+	bool	Shutdown( void );
+	//
+	const CMIUtilString &	GetPrompt( void ) const;
+	bool					SetPrompt( const CMIUtilString & vNewPrompt );
+	void					SetEnablePrompt( const bool vbYes );
+	bool					GetEnablePrompt( void ) const;
+	void					SetCtrlCHit( void );
+	bool					SetVisitor( IStreamStdin & vrVisitor );
+	bool					SetOSStdinHandler( IOSStdinHandler & vrHandler );
+	
+// Overridden:
+public:
+	// From CMIUtilThreadActiveObjBase
+	virtual const CMIUtilString & ThreadGetName( void ) const;
+	
+// Overridden:
+protected:
+	// From CMIUtilThreadActiveObjBase
+	virtual bool ThreadRun( bool & vrIsAlive );
+	virtual bool ThreadFinish( void );							// Let this thread clean up after itself
+
+// Methods:
+private:
+	/* ctor */	CMICmnStreamStdin( void );
+	/* ctor */	CMICmnStreamStdin( const CMICmnStreamStdin & );
+	void		operator=( const CMICmnStreamStdin & );
+	
+	bool			MonitorStdin( bool & vrwbYesExit );
+	const MIchar *	ReadLine( CMIUtilString & vwErrMsg );
+	bool			InputAvailable( bool & vbAvail );					// Bytes are available on stdin
+
+// Overridden:
+private:
+	// From CMICmnBase
+	/* dtor */ virtual ~CMICmnStreamStdin( void );
+
+// Attributes:
+private:
+	const CMIUtilString	m_constStrThisThreadname;
+	IStreamStdin *		m_pVisitor;
+	CMIUtilString		m_strPromptCurrent;		// Command line prompt as shown to the user
+	volatile bool		m_bKeyCtrlCHit;			// True = User hit Ctrl-C, false = has not yet
+	bool				m_bShowPrompt;			// True = Yes prompt is shown/output to the user (stdout), false = no prompt
+	bool				m_bRedrawPrompt;		// True = Prompt needs to be redrawn
+	IOSStdinHandler *	m_pStdinReadHandler;
+};
+