1 /*

     2 * Copyright (c) 2004-2009 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 the License "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 * Note: This file may contain code to generate corrupt files for test purposes.

    16 * Such code is excluded from production builds by use of compiler defines;

    17 * it is recommended that such code should be removed if this code is ever published publicly.

    18 * counter for smart ponters. See CElement.

    19 *

    20 */

    21 

    22 

    23 /**

    24  @file 

    25  @internalComponent

    26  @released

    27 */

    28 

    29 #ifndef __SHAREDCOUNT_H__

    30 #define __SHAREDCOUNT_H__

    31 

    32 

    33 #include <functional>

    34 #include "actualcounterbase.h"

    35 

    36 

    37 

    38 

    39 

    40 class CSharedCount

    41 	{

    42     friend inline bool operator == (CSharedCount const& aLeft, CSharedCount const& aRight);

    43     friend inline bool operator < (CSharedCount const& aLeft, CSharedCount const& aRight);

    44 

    45 private:

    46     CCounterBase* iBase;

    47 

    48 public:

    49     CSharedCount ();

    50     CSharedCount (CSharedCount const& aInitialiser);

    51     ~CSharedCount ();

    52 

    53     template <class P> CSharedCount (P aP) : iBase (0)

    54 		{

    55 		iBase = new CActualCounterBase <P> (aP);

    56 		}

    57 

    58     CSharedCount & operator = (CSharedCount const& aInitialiser); 

    59     void swap (CSharedCount & asc); 

    60     long UseCount () const; 

    61 

    62 	};

    63 

    64 

    65 

    66 inline CSharedCount::CSharedCount () :

    67 		iBase (0)

    68 	{

    69 	}

    70 

    71 inline CSharedCount::~CSharedCount () 

    72 	{

    73     if (iBase != NULL) 

    74 		{

    75 		iBase -> Release ();

    76 		}

    77 	}

    78 

    79 inline CSharedCount::CSharedCount (CSharedCount const& aInitialiser) :

    80 		iBase (aInitialiser.iBase) 

    81 	{

    82     if (iBase != NULL) 

    83 		{

    84 		iBase -> AddRef ();

    85 		}

    86 	}

    87 

    88 inline long CSharedCount::UseCount () const 

    89 	{

    90 	return (iBase != NULL) ? iBase -> UseCount (): 0;

    91 	}

    92 

    93 inline bool operator == (CSharedCount const& aLeft, CSharedCount const& aRight)

    94 	{

    95     return aLeft.iBase == aRight.iBase;

    96 	}

    97 

    98 inline bool operator < (CSharedCount const& aLeft, CSharedCount const& aRight)

    99 	{

   100     return std::less <CCounterBase*> () (aLeft.iBase, aRight.iBase);

   101 	}

   102 

   103 

   104 #endif // __SHAREDCOUNT_H__