1 /*

     2 * Copyright (c) 2006 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:  Main classes for Out of Memory Monitor.

    15 *

    16 */

    17 

    18 

    19 #ifndef OOMOUTOFMEMORYWATCHER_H

    20 #define OOMOUTOFMEMORYWATCHER_H

    21 

    22 #include <e32base.h>

    23 

    24 class CMemoryMonitor;

    25 

    26 /**

    27  *  This class is an active object which monitors a kernel change notifer for changes in the 

    28  *  low and good memory thresholds. 

    29  *  

    30  *  @lib oommonitor.lib

    31  *  @since S60 v5.0

    32  */

    33 NONSHARABLE_CLASS(COutOfMemoryWatcher) : public CActive

    34     {

    35 public:

    36     static COutOfMemoryWatcher* NewL(CMemoryMonitor& aLafShutdown, TInt aLowThreshold, TInt aGoodThreshold);

    37     ~COutOfMemoryWatcher();

    38     void Start();

    39     

    40     /**

    41      * Set the Low and Good thresholds that we are listening for.

    42      * These values can change from the global default values when certain applications are in the foreground.

    43      * @param aLowThreshold If Ram Level drops below the low threshold Oom Monitor actions are started.

    44      * @param aGoodThreshold When memory returns above the Good threshold then Oom Monitor stops freeing memory.

    45      */

    46     void UpdateThresholds(TInt aLowThreshold, TInt aGoodThreshold);

    47 private:

    48     COutOfMemoryWatcher(CMemoryMonitor& aLafShutdown);

    49     void ConstructL(TInt aLowThreshold, TInt aGoodThreshold);

    50 private: // from CActive

    51     void DoCancel();

    52     void RunL();

    53 private: // data

    54     RChangeNotifier iChangeNotifier;

    55     CMemoryMonitor& iLafShutdown;

    56     };

    57 

    58 #endif /*OOMOUTOFMEMORYWATCHER_H*/