--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/internetradio2.0/uiinc/irdiskspacesession.h	Mon Apr 19 14:01:53 2010 +0300
@@ -0,0 +1,162 @@
+/*
+* Copyright (c) 2005-2006 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:  Header for CIRDiskSpaceSession
+*
+*/
+
+#ifndef C_IRDISKSPACESESSION_H
+#define C_IRDISKSPACESESSION_H
+
+#include <e32base.h>
+#include <f32file.h>
+
+class MIRDiskSpaceWatcherObserver;
+
+/**
+ * Defines disk space observer. 
+ *
+ * Observers defined disk and notifies observer if disk space drops below
+ * certain level.
+ */
+NONSHARABLE_CLASS( CIRDiskSpaceSession ) : public CActive
+    {
+
+public:
+
+    /**
+     * Static constructor 
+     *
+     * @param aDiskSpaceSessionObserver Observer who is interested if disk 
+     * space drops below certain level.
+     * @param aDriveNumber drive to observe
+     * @param aCriticalLevel critical disk space level in bytes. If disk 
+     * space falls below this observer is notified.
+     */
+    static CIRDiskSpaceSession* NewL(MIRDiskSpaceWatcherObserver& 
+							         aDiskSpaceSessionObserver, 
+							         const TDriveNumber& aDriveNumber, 
+							         const TInt64& aCriticalLevel,
+							         RFs& aFs );
+
+    /**
+     * Destructor
+     */
+    ~CIRDiskSpaceSession();
+            
+    /**
+     * Tells observed drive.
+     *
+     * @return Drive number which is been observed by this session.
+     */
+    TDriveNumber DriveNumber();
+        
+    /**
+     * Sets observer count
+     *
+     * @param aObserverCount observer count
+     */
+    void SetObserverCount( TInt aObserverCount );
+
+    /**
+     * Returns observer count
+     *
+     * @return observer count
+     */    
+    TInt ObserverCount();
+    
+    /**
+     * IsBelowCriticalLevel Returns whether or disk defined by parameter 
+     * contains less than the critical level free disk space.
+     *
+     * @param aDriveNumber drive which space is checked
+     * @return ETrue if there is less free disk space than the critical 
+     * level, otherwise EFalse.
+     */
+    TBool IsBelowCriticalLevel( const TDriveNumber& aDriveNumber ) const;
+   
+protected:
+
+    // from base class CActive
+    /**
+     * From CActive 
+     * 
+     * @see CActive::DoCancel()
+     */
+    void DoCancel();
+
+    /**
+     * From CActive 
+     *
+     * Invoked when the observed disk's free disk space has run 
+     * below the supplied critical level.
+     * Notifies the observer and regenerates the request to RFs' 
+     * NotifyDiskSpace.
+     * @see CActive::RunL()
+     */
+    void RunL();
+
+private:
+
+    /**
+     * C++ default constructor. Sets references.
+     *
+     * @param aDiskSpaceSessionObserver Observer who is interested if disk 
+     * space drops below certain level.
+     * @param aDriveNumber drive to observe
+     * @param aCriticalLevel critical disk space level in bytes. If disk 
+     * space falls below this observer is notified.     
+     */
+    CIRDiskSpaceSession(MIRDiskSpaceWatcherObserver& 
+				        aDiskSpaceSessionObserver, 
+				        const TDriveNumber& aDriveNumber, 
+				        const TInt64& aCriticalLevel,
+				        RFs& aFs );
+
+    /**
+     * Second phase constructor
+     */
+    void ConstructL();
+
+private: 
+
+	/** 
+	 * The observer to be notified when critical disk space limit is reached. 
+	 */
+    MIRDiskSpaceWatcherObserver& iObserver;
+
+    /** 
+     * Drive to be observed. 
+     */
+    const TDriveNumber iDriveNumber;
+
+    /** 
+     * Critical disk space level. 
+     */
+    const TInt64 iCriticalLevel;
+
+    /** 
+     * Handle to the file system. 
+     */
+    RFs& iFs;
+
+    /** 
+     * Number of observers of this drive. When observer count drops to 
+     * zero drive observation can be stopped.
+     */
+    TInt iObserverCount;
+
+    };
+
+
+#endif // C_IRDISKSPACESESSION_H