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  * huilowmemoryobserver.h

    19  *

    20  *  Created on: Jun 9, 2009

    21  *      Author: ranshett

    22  */

    23 

    24 #ifndef HUILOWMEMORYOBSERVER_H_

    25 #define HUILOWMEMORYOBSERVER_H_

    26 

    27 enum THuiMemoryLevel

    28     {

    29     /** 

    30      * No memory available at all. Even all rendering 

    31      * surfaces and buffers should be released.

    32      *  

    33      **/

    34     EHuiMemoryLevelNone = -50,

    35 

    36     /** 

    37      * Lowest memory level. Use SW rendering if possible, 

    38      * only rendering surfaces etc. absolutely mandatory 

    39      * objects are allowed to consume memory.

    40      * 

    41      **/

    42     EHuiMemoryLevelLowest = -40,

    43     

    44     /** 

    45      * To be defined.

    46      *  

    47      **/

    48     EHuiMemoryLevelLower = -30,    

    49     

    50     /** 

    51      * Low memory level, same as EnableLowMemoryState(ETrue). Normal

    52      * functionality and user experience is not provided. Memory usage

    53      * is minimized, but HW rendering is to be used. Caches, buffers,

    54      * effects, etc. are to be disabled.

    55      *  

    56      **/

    57     EHuiMemoryLevelLow = -20, 

    58     

    59     /** 

    60      *  Reduced memory level. Normal functionality and user experience

    61      *  should be provided, but all non-mandatory memory usage should

    62      *  be avoided. 

    63      *  

    64      **/

    65     EHuiMemoryLevelReduced = -10,    

    66 

    67     /** 

    68      * Normal memory level, same as EnableLowMemoryState(EFalse) 

    69      **/

    70     EHuiMemoryLevelNormal = 0    

    71     };

    72 

    73 /** 

    74  * Memory level observer interface is same as MHuiLowMemoryObserver

    75  * but gives more detailed information about memory levels. 

    76  **/

    77 class MHuiMemoryLevelObserver

    78     {

    79 public:

    80     IMPORT_C virtual void SetMemoryLevel(THuiMemoryLevel aLevel)=0;

    81     };

    82 

    83 /** 

    84  * @deprecated use MHuiMemoryLevelObserver instead.

    85  **/

    86 class MHuiLowMemoryObserver

    87     {

    88 public:

    89     IMPORT_C virtual void EnableLowMemoryState(TBool aEnable)=0;

    90     };

    91 

    92 #endif /* HUILOWMEMORYOBSERVER_H_ */