1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (developer.feedback@nokia.com)

     6 **

     7 ** This file is part of the HbServers module of the UI Extensions for Mobile.

     8 **

     9 ** GNU Lesser General Public License Usage

    10 ** This file may be used under the terms of the GNU Lesser General Public

    11 ** License version 2.1 as published by the Free Software Foundation and

    12 ** appearing in the file LICENSE.LGPL included in the packaging of this file.

    13 ** Please review the following information to ensure the GNU Lesser General

    14 ** Public License version 2.1 requirements will be met:

    15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    16 **

    17 ** In addition, as a special exception, Nokia gives you certain additional

    18 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    20 **

    21 ** If you have questions regarding the use of this file, please contact

    22 ** Nokia at developer.feedback@nokia.com.

    23 **

    24 ****************************************************************************/

    25 

    26 #ifndef HBCACHE_H

    27 #define HBCACHE_H

    28 

    29 #include <hbglobal.h>

    30 #include <QHash>

    31 #include <QList>

    32 

    33 struct HbCacheItem

    34 {

    35     int offset;

    36     int refCount;

    37     QString fileName;

    38 

    39     HbCacheItem(int off = -1, int count = 0, const QString &fName = QString())

    40             : offset(off),

    41             refCount(count),

    42             fileName(fName)

    43     {

    44 

    45     }

    46     void incrementRefCount()

    47     {

    48         refCount++;

    49     }

    50     void decrementRefCount()

    51     {

    52         refCount--;

    53     }

    54 };

    55 

    56 class HbCache

    57 {

    58 public:

    59     HbCache();

    60     ~HbCache();

    61     void clear();

    62     HbCacheItem* value(const QString &key) const;

    63     HbCacheItem* cacheItem(const QString &key);

    64     bool insert(const QString &key, HbCacheItem *item);

    65     bool remove(const QString &key);

    66     bool contains(const QString &key) const;

    67     QList<HbCacheItem*> &lruList();

    68     QHash<QString, HbCacheItem*> &cacheHandle();

    69 

    70 private:

    71     QHash<QString, HbCacheItem*> cache;

    72     QList<HbCacheItem*> unusedResources;

    73 };

    74 

    75 

    76 #endif /* HBCACHE_H */