1 /*

     2 * Copyright (c) 2009 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 #include <e32property.h>

    19 

    20 #include <QFile>

    21 

    22 #include "hsrecoverymanager.h"

    23 

    24 const TInt KPSCategoryUid(0x20022F36);

    25 const TInt KPSCrashCountKey(1);

    26 const int KCrashCountThreshold(3);

    27 const int KResetCrashCountInterval(60000);

    28 

    29 /*!

    30     \class HsRecoveryManager

    31     \ingroup group_hsapplication

    32     \brief Used during homescreen startup for recovering from possible crash situations.

    33 */

    34 

    35 /*!

    36     Constructs a new recovery manager with the given \a parent item.

    37 */

    38 HsRecoveryManager::HsRecoveryManager(QObject *parent)

    39   : QObject(parent)

    40 {    

    41     mTimer.setInterval(KResetCrashCountInterval);

    42     mTimer.setSingleShot(true);

    43     connect(&mTimer, SIGNAL(timeout()), SLOT(resetCrashCount()));

    44 }

    45 

    46 /*!

    47     Destructor.

    48 */

    49 HsRecoveryManager::~HsRecoveryManager()

    50 {

    51 }

    52 

    53 /*!

    54     Executes this recovery manager. If crash count exceeds the

    55     threshold, the ROM configuration is selected. Otherwise,

    56     the existing one is used.

    57 */

    58 void HsRecoveryManager::execute()

    59 {

    60     int count = crashCount();    

    61     if (KCrashCountThreshold <= count) {

    62         restoreRomDatabase();

    63         resetCrashCount();

    64         return;

    65     }

    66     if (0 < count) {

    67         mTimer.start();

    68     }

    69 }

    70 

    71 /*!

    72     Restores the ROM database to c: drive.

    73 */

    74 void HsRecoveryManager::restoreRomDatabase()

    75 {

    76     // If exists, remove the database from c:

    77     QFile file("c:/private/20022f35/homescreen.db");

    78     if (file.exists()) {        

    79         file.remove();

    80     }          

    81     // Copy the rom database to c: and set permissions.

    82     file.setFileName("z:/private/20022f35/homescreen.db");     

    83     file.copy("c:/private/20022f35/homescreen.db");

    84     file.setFileName("c:/private/20022f35/homescreen.db");

    85     file.setPermissions(QFile::ReadOwner | QFile::WriteOwner);

    86 }

    87 

    88 /*!

    89     Resets the crash count to zero.

    90 */

    91 void HsRecoveryManager::resetCrashCount()

    92 {

    93     RProperty::Set(TUid::Uid(KPSCategoryUid), KPSCrashCountKey, 0); 

    94 }

    95 

    96 /*!

    97     Returns the current crash count.

    98 */

    99 int HsRecoveryManager::crashCount()

   100 {

   101     TInt count = 0;

   102     RProperty::Get(TUid::Uid(KPSCategoryUid), KPSCrashCountKey, count);    

   103     return count;

   104 }