diff -r 000000000000 -r bde4ae8d615e os/ossrv/lowlevellibsandfws/pluginfw/Framework/frame/DriveInfo.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/ossrv/lowlevellibsandfws/pluginfw/Framework/frame/DriveInfo.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,107 @@
+// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Declaration for CEcomCachedDriveInfo class
+// 
+//
+
+/**
+ @file
+ @internalComponent
+*/
+
+#ifndef DRIVEINFO_H
+#define DRIVEINFO_H
+
+#include <e32std.h>
+#include <f32file.h>
+
+/** A set of bit flags representing drive attributes of interest
+ to ECOM */
+enum TEComDrvAttr
+	{
+	// No scanning performed on 3 kinds of drives
+	// 1. discovery disabled by licensees, 2. remote (network) drive,
+	//    and 3. substituted drive. 
+	EEComDrvAttrNoDiscovery		= 0x1,
+
+	// plug-ins on removable media needs extra validation
+	EEComDrvAttrRemovable		= 0x2,
+
+	EEComDrvAttrReadOnlyInternal= 0x4,
+
+	// Custom resolver cache cares about this
+	EEComDrvAttrWritable		= 0x8
+	};
+
+/** A struct to store the driveNumber and TEComDrvAttr of a drive. */
+struct TEComDrvFlags
+	{
+	TUint32 iFlags;
+	TInt32	iDrvNumber;
+	};
+
+/** class to keep track of drive attributes of interest to ECOM.
+ */
+class CEComCachedDriveInfo : public CBase
+	{
+public:
+	static CEComCachedDriveInfo* NewL(RFs& aFs);
+	TBool DriveIsReadOnlyInternalL(const TInt aDrive) const;
+	TBool DriveIsRemovableL(const TInt aDrive) const;
+	TBool DriveIsWritableL(const TInt aDrive) const;
+
+private:
+	CEComCachedDriveInfo();
+	void ConstructL(RFs& aFs, TUint32 aDiscoveryDisabledMask);
+
+private:
+	static TFixedArray<TEComDrvFlags, KMaxDrives> iDriveAttr;
+	static TInt  iLastIndex;
+	static TBool iInitialized;
+
+	friend class TEComCachedDriveInfoIterator;	// to access private data
+	friend class TDriveInfo_StateAccessor; // for testing
+	};
+
+
+/** Iterator which return only valid drives.
+
+After instantiation, user must call either First() or Last()
+to set the initial position and check InRange() before calling
+the methods to access the drive number and attributes.
+*/
+class TEComCachedDriveInfoIterator
+	{
+public:
+	TEComCachedDriveInfoIterator(const CEComCachedDriveInfo& aCachedDriveInfo);
+
+	void First(void);
+	void Next(void);
+	void Last(void);
+	void Prev(void);
+	TBool SetPos(const TInt aDrive);
+	TBool InRange(void) const;
+
+	TDriveNumber DriveNumber(void) const;
+	TDriveUnit	DriveUnit(void) const;
+	TBool DriveIsReadOnlyInternal(void) const;
+	TBool DriveIsRemovable(void) const;
+	TBool DriveIsWritable(void) const;
+
+private:
+	const TFixedArray<TEComDrvFlags, KMaxDrives>& iDriveAttr;
+	TInt  iIndex;
+	};
+
+#endif // DRIVEINFO_H