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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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// INCLUDE FILES
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#include "dpdef.h" // dataport definitions
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#include "dpobserver.h" // abstract observer class
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#include "dplog.h" // dataport logging
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#include "osttracedefinitions.h"
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#ifdef OST_TRACE_COMPILER_IN_USE
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#include "dpobservertraces.h"
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#endif
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// EXTERNAL DATA STRUCTURES
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// none
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// EXTERNAL FUNCTION PROTOTYPES
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// none
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// CONSTANTS
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const TInt CDpObserver::iOffset = _FOFF(CDpObserver,iSlink);
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// MACROS
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// none
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// LOCAL CONSTANTS AND MACROS
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// none
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// MODULE DATA STRUCTURES
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// none
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// LOCAL FUNCTION PROTOTYPES
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// none
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// FORWARD DECLARATIONS
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// none
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// ============================= LOCAL FUNCTIONS ===============================
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// none
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// ============================ MEMBER FUNCTIONS ===============================
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// ---------------------------------------------------------
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// CDpObserver::CDpObserver
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// C++ default constructor.
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// ---------------------------------------------------------
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CDpObserver::CDpObserver()
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{
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OstTrace0( TRACE_NORMAL, CDPOBSERVER_CDPOBSERVER, "CDpObserver::CDpObserver" );
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}
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// ---------------------------------------------------------
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// CDpObserver::~CDpObserver
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// Destructor
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// ---------------------------------------------------------
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CDpObserver::~CDpObserver()
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{
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OstTrace0( TRACE_NORMAL, DUP1_CDPOBSERVER_CDPOBSERVER, "CDpObserver::~CDpObserver" );
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iSlink.iNext = NULL;
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}
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//=============================================================================
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// ============================ MEMBER FUNCTIONS ===============================
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// ---------------------------------------------------------
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// CDpSubject::CDpSubject
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// C++ default constructor.
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// ---------------------------------------------------------
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CDpSubject::CDpSubject() :
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iObserverList( CDpObserver::iOffset ),
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iObserverIter( iObserverList )
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{
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OstTrace0( TRACE_NORMAL, CDPSUBJECT_CDPSUBJECT, "CDpSubject::CDpSubject" );
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LOGM(" CDpSubject::CDpSubject");
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}
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// ---------------------------------------------------------
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// CDpSubject::~CDpSubject
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// Destructor
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// ---------------------------------------------------------
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CDpSubject::~CDpSubject()
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{
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OstTrace0( TRACE_NORMAL, DUP1_CDPSUBJECT_CDPSUBJECT, "CDpSubject::~CDpSubject" );
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LOGM(" CDpSubject::~CDpSubject");
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CDpObserver* item= NULL;
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// set observer to first item in the list
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iObserverIter.SetToFirst();
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while( NULL != (item = iObserverIter++) )
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{
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iObserverList.Remove( *item );
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}
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}
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// ---------------------------------------------------------
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// CDpSubject::Attach
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// Attach observer to this subject
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// ---------------------------------------------------------
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//
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void CDpSubject::Attach(
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CDpObserver& aObserver)
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{
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OstTrace0( TRACE_NORMAL, CDPSUBJECT_ATTACH, "CDpSubject::Attach" );
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LOGM(" CDpSubject::Attach");
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iObserverList.AddLast( aObserver );
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}
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// ---------------------------------------------------------
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// CDpSubject::Detach
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// Detach observer from this subject
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// ---------------------------------------------------------
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//
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void CDpSubject::Detach(
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CDpObserver& aObserver)
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{
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OstTrace0( TRACE_NORMAL, CDPSUBJECT_DETACH, "CDpSubject::Detach" );
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LOGM(" CDpSubject::Detach");
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iObserverList.Remove( aObserver );
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}
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// ---------------------------------------------------------
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// CDpSubject::Notify
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// Notify all observers of this subject object
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// i.e. call UpDate() in every observer object.
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// ---------------------------------------------------------
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//
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void CDpSubject::Notify()
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{
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OstTrace0( TRACE_NORMAL, CDPSUBJECT_NOTIFY, "CDpSubject::Notify" );
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LOGM(" CDpSubject::Notify");
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CDpObserver* item = NULL;
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iObserverIter.SetToFirst();
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while( NULL != (item = iObserverIter++) )
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{
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item->UpDate( this );
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}
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}
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// ================= OTHER EXPORTED FUNCTIONS ==============
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// none
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// End of File
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