diff -r 657f875b013e -r 73ea206103e6 kernel/eka/include/drivers/sdcard.inl
--- a/kernel/eka/include/drivers/sdcard.inl	Fri Jun 11 15:02:23 2010 +0300
+++ b/kernel/eka/include/drivers/sdcard.inl	Wed Jun 23 19:44:53 2010 +0300
@@ -1,4 +1,4 @@
-// Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).
+// Copyright (c) 1999-2010 Nokia Corporation and/or its subsidiary(-ies).
 // All rights reserved.
 // This component and the accompanying materials are made available
 // under the terms of the License "Eclipse Public License v1.0"
@@ -44,6 +44,34 @@
 inline TUint32 TSDCard::PARootDirEnd() const			{return iPARootDirEnd;}
 inline void TSDCard::SetPARootDirEnd(TUint32 aPARootDirEnd)	{iPARootDirEnd=aPARootDirEnd;}
 
+/**
+Called when a client registers with the SD card.
+*/
+inline void TSDCard::RegisterClient()
+	{
+	__e32_atomic_add_ord32(&iClientCountSD, 1);
+	}
+
+/**
+Called when a client de-registers with the SD card.
+*/	
+inline void TSDCard::DeregisterClient()
+
+	{ 
+	__e32_atomic_add_ord32(&iClientCountSD, TUint32(-1));
+	}
+
+/**
+Returned value indicates whether or not clients have registered with the SD card.
+*/
+inline TBool TSDCard::ClientsRegistered()
+	{
+	if(iClientCountSD)
+		return ETrue;
+
+	return EFalse;
+	}
+
 // ======== TSDCardArray ========
 
 inline TSDCardArray::TSDCardArray(DSDStack* aOwningStack) : TMMCardArray(aOwningStack)