1 /*

     2 * Copyright (c) 2007 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:  Reference counting wrapper for MCameraBuffer.

    15 *

    16 */

    17 

    18 

    19 #ifndef CAM_BUFFERSHARE_H

    20 #define CAM_BUFFERSHARE_H

    21 

    22 #include <e32base.h>

    23 

    24 

    25 class MCameraBuffer;

    26 

    27 class CCamBufferShare : public CBase

    28   {

    29   // =======================================================

    30   // Methods

    31 

    32   // -------------------------------------------------------

    33   // Constructor and destructor

    34   public:

    35 

    36     /**

    37     * This is just a wrapper class => c++ constructor

    38     */

    39     CCamBufferShare( MCameraBuffer* aSharedBuffer );

    40 

    41   private:    

    42 

    43     /**

    44     * Reference counting used, so destructor is private.

    45     */

    46     ~CCamBufferShare();

    47     

    48   // -------------------------------------------------------

    49   // Other methods

    50   public:

    51 

    52     /**

    53     * Get the shared buffer. Ownership not given to caller.

    54     */

    55     MCameraBuffer* SharedBuffer();

    56 

    57     /**

    58     * Reserve a reference to this share.

    59     */  

    60     void Reserve();

    61 

    62     /**

    63     * Release a reference to this share.

    64     */

    65     void Release();

    66 

    67 #ifdef _DEBUG

    68     /**

    69     * Get the amount of used buffers in total.

    70     */

    71     static TInt TotalBufferShareCount();

    72 #endif

    73  

    74   // =======================================================

    75   // Data 

    76   protected:

    77 

    78 #ifdef _DEBUG

    79     static TInt    isTotalBufferCount;

    80 #endif

    81 

    82   private:

    83 

    84     MCameraBuffer* iSharedBuffer;

    85     TInt           iReferenceCount;

    86     

    87   // =======================================================

    88   };

    89 

    90 #endif

    91 

    92 // end of file

    93