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:  Low memory observer for havester server

    15 *

    16 */

    17 

    18 

    19 #ifndef MDSOOMPLUGIN_H

    20 #define MDSOOMPLUGIN_H

    21 

    22 // INCLUDES

    23 #include <e32std.h>

    24 #include <e32base.h>

    25 #include <e32msgqueue.h>

    26 

    27 #include <oommonitorplugin.h>

    28 

    29 // CLASS DECLARATION

    30 

    31 /**

    32 *  CMdSOomPlugin

    33 * 

    34 */

    35 class CMdSOomPlugin : public COomMonitorPlugin

    36 	{

    37 public:

    38 	// Constructors and destructor

    39 	static CMdSOomPlugin* NewL();

    40 	

    41 	/**

    42 	 * Destructor.

    43 	 */

    44 	virtual ~CMdSOomPlugin();	

    45 	

    46 

    47 	/**

    48 	 * From COomMonitorPlugin

    49 	 * FreeRam is called when the system RAM level becomes

    50 	 * low. This plugin is requested to help free some RAM.

    51 	 */

    52 	void FreeRam();

    53 

    54 	/**

    55 	 * From COomMonitorPlugin

    56 	 * MemoryGood is called when the system RAM level becomes

    57 	 * good after being low.The plugin may take this opportunity

    58 	 * to start using RAM again.

    59 	 * Nb It is assumed that the plugin will not immediately

    60 	 * cause a large increase in memory use, but that memory may be

    61 	 * used over time, otherwise the plugin may cause oscillation

    62 	 * between low and good memory states.

    63 	 */

    64 	void MemoryGood();

    65 

    66 private:

    67 

    68 	/**

    69 	 * Constructor for performing 1st stage construction

    70 	 */

    71 	CMdSOomPlugin();

    72 	

    73 	/**

    74 	 * default constructor for performing 2nd stage construction

    75 	 */

    76 	void ConstructL();

    77 

    78 	/**

    79 	 * From COomMonitorPlugin

    80 	 */

    81 	void ExtensionInterface(TUid aInterfaceId, TAny*& aImplementation);

    82     

    83 private:

    84 

    85 	RMsgQueue<TInt> iOomMsgQueue;

    86 	

    87 	};

    88 

    89 #endif // MDSOOMPLUGIN_H

    90