1 /*

     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  

    15  *

    16 */

    17 

    18 #ifndef C_CCHSWIUSBOBSERVER_H

    19 #define C_CCHSWIUSBOBSERVER_H

    20 

    21 // INCLUDES

    22 #include <e32std.h>

    23 #include <e32base.h>

    24 #include <f32file.h>

    25 

    26 // FORWARD DECLARATION

    27 class CCHSwiUsbHandler;

    28 

    29 /*

    30  * Observes RFs for RawDiskWrite events (these are also triggered when 

    31  * (un)mounting drive; RFs does not provide better, more specific 

    32  * notifications for mount and dismount).

    33  * 

    34  * After receiving notification, calls 

    35  * CCHSwiUsbHandler::PostponedDriveScan() and does not subscribe to

    36  * further notifcations. It is up to the plugin to call

    37  * CCHSwiUsbObserver::Start() after a successful drive scan.

    38  *

    39  * @since 3.1

    40  */

    41 class CCHSwiUsbObserver : public CActive

    42     {

    43 public:

    44 	/**

    45 	 * Two-phased constructor.

    46      * @param aFs File session. 

    47 	 */

    48     static CCHSwiUsbObserver* NewL( CCHSwiUsbHandler* aHandler, RFs& aFs );

    49 

    50 	/**

    51 	 * Destructor.

    52 	 */

    53     virtual ~CCHSwiUsbObserver();

    54 

    55     /**

    56      * Active object start.

    57      */

    58     void Start();

    59 

    60 protected:

    61 

    62 	/**

    63 	 * Handle RFs notifications.

    64 	 */

    65     void RunL();

    66 

    67     /**

    68      * RunL error handling.

    69      * @param aError Error.

    70      */

    71     TInt RunError( TInt aError );

    72 

    73     /**

    74      * Cancels notifications.

    75      */

    76     void DoCancel();

    77 

    78 private:

    79     

    80     /**

    81      * no copy constructor

    82      */

    83     CCHSwiUsbObserver( const CCHSwiUsbObserver& );

    84     

    85     /**

    86      * no assignment

    87      */    

    88     CCHSwiUsbObserver& operator=( const CCHSwiUsbObserver& );

    89 

    90     /**

    91      * C++ default constructor

    92      */

    93     CCHSwiUsbObserver( CCHSwiUsbHandler* aHandler, RFs& aFs );

    94 

    95     /**

    96      * Symbian default constructor.

    97      */

    98     void ConstructL();

    99     

   100 private:

   101 	

   102 	/**

   103 	 * File Session.

   104 	 */

   105     RFs iFs;

   106     

   107     /**

   108      * Usb handler to perform postponed checks for mass storage mode.

   109      */

   110     CCHSwiUsbHandler* iUsbHandler;

   111     };

   112 

   113 #endif // #ifndef C_CCHSWIUSBOBSERVER_H