1 /*

     2 * Copyright (c) 2007-2008 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 *

    16 */

    17 

    18 

    19 

    20 // INCLUDE FILES

    21 #include    "dpdef.h"                   // dataport definitions

    22 #include    "dpobserver.h"              // abstract observer class

    23 #include    "dplog.h"                   // dataport logging

    24 #include "osttracedefinitions.h"

    25 #ifdef OST_TRACE_COMPILER_IN_USE

    26 #include "dpobservertraces.h"

    27 #endif

    28 

    29 // EXTERNAL DATA STRUCTURES

    30 // none

    31 

    32 // EXTERNAL FUNCTION PROTOTYPES

    33 // none

    34 

    35 // CONSTANTS

    36 const TInt CDpObserver::iOffset = _FOFF(CDpObserver,iSlink);

    37 

    38 // MACROS

    39 // none

    40 

    41 // LOCAL CONSTANTS AND MACROS

    42 // none

    43 

    44 // MODULE DATA STRUCTURES

    45 // none

    46 

    47 // LOCAL FUNCTION PROTOTYPES

    48 // none

    49 

    50 // FORWARD DECLARATIONS

    51 // none

    52 

    53 // ============================= LOCAL FUNCTIONS ===============================

    54 

    55 // none

    56 

    57 

    58 // ============================ MEMBER FUNCTIONS ===============================

    59 

    60 // ---------------------------------------------------------

    61 // CDpObserver::CDpObserver

    62 // C++ default constructor.

    63 // ---------------------------------------------------------

    64 CDpObserver::CDpObserver()

    65     {

    66     OstTrace0( TRACE_NORMAL, CDPOBSERVER_CDPOBSERVER, "CDpObserver::CDpObserver" );

    67     }

    68 

    69 // ---------------------------------------------------------

    70 // CDpObserver::~CDpObserver

    71 // Destructor

    72 // ---------------------------------------------------------

    73 CDpObserver::~CDpObserver()

    74     {

    75     OstTrace0( TRACE_NORMAL, DUP1_CDPOBSERVER_CDPOBSERVER, "CDpObserver::~CDpObserver" );

    76     iSlink.iNext = NULL;

    77     }

    78 

    79 //=============================================================================

    80 

    81 

    82 // ============================ MEMBER FUNCTIONS ===============================

    83 

    84 // ---------------------------------------------------------

    85 // CDpSubject::CDpSubject

    86 // C++ default constructor.

    87 // ---------------------------------------------------------

    88 CDpSubject::CDpSubject() :

    89     iObserverList( CDpObserver::iOffset ),

    90     iObserverIter( iObserverList )

    91     {

    92     OstTrace0( TRACE_NORMAL, CDPSUBJECT_CDPSUBJECT, "CDpSubject::CDpSubject" );

    93     LOGM(" CDpSubject::CDpSubject");

    94     }

    95 

    96 // ---------------------------------------------------------

    97 // CDpSubject::~CDpSubject

    98 // Destructor

    99 // ---------------------------------------------------------

   100 CDpSubject::~CDpSubject()

   101     {

   102     OstTrace0( TRACE_NORMAL, DUP1_CDPSUBJECT_CDPSUBJECT, "CDpSubject::~CDpSubject" );

   103     LOGM(" CDpSubject::~CDpSubject");

   104 

   105     CDpObserver* item= NULL;

   106 

   107     // set observer to first item in the list

   108     iObserverIter.SetToFirst();

   109 

   110     while( NULL != (item = iObserverIter++) )

   111         {

   112         iObserverList.Remove( *item );

   113         }

   114     }

   115 

   116 // ---------------------------------------------------------

   117 // CDpSubject::Attach

   118 // Attach observer to this subject

   119 // ---------------------------------------------------------

   120 //

   121 void CDpSubject::Attach(

   122     CDpObserver& aObserver)

   123     {

   124     OstTrace0( TRACE_NORMAL, CDPSUBJECT_ATTACH, "CDpSubject::Attach" );

   125     LOGM(" CDpSubject::Attach");

   126     iObserverList.AddLast( aObserver );

   127     }

   128 

   129 // ---------------------------------------------------------

   130 // CDpSubject::Detach

   131 // Detach observer from this subject

   132 // ---------------------------------------------------------

   133 //

   134 void CDpSubject::Detach(

   135     CDpObserver& aObserver)

   136     {

   137     OstTrace0( TRACE_NORMAL, CDPSUBJECT_DETACH, "CDpSubject::Detach" );

   138     LOGM(" CDpSubject::Detach");

   139 

   140     iObserverList.Remove( aObserver );

   141     }

   142 

   143 // ---------------------------------------------------------

   144 // CDpSubject::Notify

   145 // Notify all observers of this subject object

   146 // i.e. call UpDate() in every observer object.

   147 // ---------------------------------------------------------

   148 //

   149 void CDpSubject::Notify()

   150     {

   151     OstTrace0( TRACE_NORMAL, CDPSUBJECT_NOTIFY, "CDpSubject::Notify" );

   152     LOGM(" CDpSubject::Notify");

   153 

   154     CDpObserver* item = NULL;

   155     iObserverIter.SetToFirst();

   156     while( NULL != (item = iObserverIter++) )

   157         {

   158         item->UpDate( this );

   159         }

   160     }

   161 

   162 // ================= OTHER EXPORTED FUNCTIONS ==============

   163 // none

   164 

   165 //  End of File