author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:21:16 +0100 | |
branch | RCL_3 |
changeset 72 | 1481bf457703 |
parent 0 | 95b198f216e5 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2006 - 2007 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 "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: DRM Queue |
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* |
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*/ |
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|
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|
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// ============================ MEMBER FUNCTIONS =============================== |
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|
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// ----------------------------------------------------------------------------- |
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// CDrmQueue |
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// Constructor |
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// ----------------------------------------------------------------------------- |
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// |
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template< class T > inline DRM::CDrmQueue< T >::CDrmQueue() : CBase() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// ~CDrmQueue |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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template< class T > inline DRM::CDrmQueue< T >::~CDrmQueue() |
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{ |
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T* payload = PopFront(); |
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|
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// Empty the queue: |
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while( payload ) |
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{ |
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delete payload; |
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payload = PopFront(); |
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} |
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iSemaphore.Close(); |
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} |
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// ----------------------------------------------------------------------------- |
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// CDrmQueue::ConstructL() |
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// (other items were commented in a header). |
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// ----------------------------------------------------------------------------- |
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// |
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template< class T > inline void DRM::CDrmQueue< T >::ConstructL() |
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{ |
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User::LeaveIfError( iSemaphore.CreateLocal(1) ); |
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} |
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// ----------------------------------------------------------------------------- |
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// CDrmQueue::NewLC |
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// (other items were commented in a header). |
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// ----------------------------------------------------------------------------- |
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// |
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template< class T > inline DRM::CDrmQueue< T >* DRM::CDrmQueue< T >::NewLC() |
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{ |
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DRM::CDrmQueue< T >* self( new( ELeave ) DRM::CDrmQueue< T >() ); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CDrmQueue::NewL |
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// (other items were commented in a header). |
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// ----------------------------------------------------------------------------- |
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// |
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template< class T > inline DRM::CDrmQueue< T >* DRM::CDrmQueue< T >::NewL() |
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{ |
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DRM::CDrmQueue< T >* self( DRM::CDrmQueue< T >::NewLC() ); |
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CleanupStack::Pop( self ); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CDrmRightsInfoImpl::AppendToQueue |
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// ----------------------------------------------------------------------------- |
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// |
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template< class T > inline void DRM::CDrmQueue< T >::AppendToQueueL( T* aData ) |
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{ |
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CleanupStack::PushL( aData ); |
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QueueData* data( new (ELeave) QueueData ); |
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// insert the data into the queue object |
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data->iData = aData; |
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data->iNext = NULL; |
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CleanupStack::Pop( aData ); |
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// Critical area start: |
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iSemaphore.Wait(); |
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if( !iLast ) |
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{ |
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iFirst = data; |
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iLast = iFirst; |
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} |
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|
108 |
else |
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|
109 |
{ |
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|
110 |
iLast->iNext = data; |
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|
111 |
iLast = data; |
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|
112 |
} |
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|
113 |
|
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|
114 |
// Critical area end |
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|
115 |
iSemaphore.Signal(); |
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|
116 |
} |
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|
117 |
|
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|
118 |
// ----------------------------------------------------------------------------- |
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119 |
// CDrmRightsInfoImpl::PopFront |
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|
120 |
// ----------------------------------------------------------------------------- |
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121 |
// |
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122 |
template< class T > inline T* DRM::CDrmQueue< T >::PopFront() |
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|
123 |
{ |
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|
124 |
QueueData* data = NULL; |
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125 |
T* payload = NULL; |
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|
126 |
|
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|
127 |
// If there is nothing in the queue return NULL |
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|
128 |
if( !iFirst ) |
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|
129 |
{ |
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|
130 |
return payload; |
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|
131 |
} |
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|
132 |
|
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|
133 |
// Critical area start: |
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|
134 |
iSemaphore.Wait(); |
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|
135 |
|
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|
136 |
data = iFirst; |
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|
137 |
|
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|
138 |
// Set the first and the next |
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|
139 |
iFirst = iFirst->iNext; |
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|
140 |
|
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|
141 |
// reset the pointer on data |
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|
142 |
data->iNext = NULL; |
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|
143 |
|
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|
144 |
// if there is no next in iFirst, this is the last or if there is no iFirst |
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|
145 |
if( !iFirst || !iFirst->iNext ) |
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diff
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|
146 |
{ |
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|
147 |
iLast = iFirst; |
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|
148 |
} |
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diff
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|
149 |
|
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|
150 |
// Critical Area End |
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|
151 |
iSemaphore.Signal(); |
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|
152 |
|
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|
153 |
payload = data->iData; |
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|
154 |
delete data; |
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|
155 |
data = NULL; |
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|
156 |
|
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|
157 |
return payload; |
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|
158 |
} |
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diff
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|
159 |
|
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diff
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|
160 |
// ----------------------------------------------------------------------------- |
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|
161 |
// CDrmRightsInfoImpl::PopItem |
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|
162 |
// ----------------------------------------------------------------------------- |
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|
163 |
// |
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|
164 |
template< class T > inline T* DRM::CDrmQueue< T >::PopItem( TInt aId ) |
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|
165 |
{ |
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|
166 |
QueueData* current( iFirst ); |
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|
167 |
QueueData* previous( NULL ); |
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|
168 |
T* payload( NULL ); |
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diff
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|
169 |
|
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|
170 |
// If there is nothing in the queue return NULL |
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|
171 |
if( !iFirst ) |
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diff
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|
172 |
{ |
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|
173 |
return payload; |
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diff
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|
174 |
} |
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Revision: 200949
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parents:
diff
changeset
|
175 |
// Critical area start: |
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|
176 |
iSemaphore.Wait(); |
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Revision: 200949
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parents:
diff
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|
177 |
// Iterate over all items in the queue |
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Revision: 200949
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|
178 |
while ( current ) |
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|
179 |
{ |
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Revision: 200949
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|
180 |
if ( aId == current->iData->iOperationId ) |
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parents:
diff
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|
181 |
{ |
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Revision: 200949
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diff
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|
182 |
payload = current->iData; |
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Revision: 200949
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parents:
diff
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|
183 |
current->iData = NULL; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
184 |
if ( previous ) |
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Revision: 200949
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parents:
diff
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|
185 |
{ |
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Revision: 200949
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parents:
diff
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|
186 |
// Previous present. So its member iNext must be updated. |
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parents:
diff
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|
187 |
previous->iNext = current->iNext; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
188 |
} |
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Revision: 200949
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parents:
diff
changeset
|
189 |
else |
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Revision: 200949
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parents:
diff
changeset
|
190 |
{ |
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Revision: 200949
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parents:
diff
changeset
|
191 |
// previous not present, so current was first, |
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Revision: 200949
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parents:
diff
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|
192 |
// and iFirst must be updated. |
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parents:
diff
changeset
|
193 |
iFirst = current->iNext; |
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Revision: 200949
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parents:
diff
changeset
|
194 |
} |
95b198f216e5
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parents:
diff
changeset
|
195 |
|
95b198f216e5
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parents:
diff
changeset
|
196 |
if ( !current->iNext ) |
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Revision: 200949
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parents:
diff
changeset
|
197 |
{ |
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Revision: 200949
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parents:
diff
changeset
|
198 |
// Current was last item. So iLast must be updated. |
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parents:
diff
changeset
|
199 |
iLast = previous; |
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Revision: 200949
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parents:
diff
changeset
|
200 |
} |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
201 |
current->iNext = NULL; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
202 |
delete current; |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
break; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
204 |
} |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
205 |
previous = current; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
206 |
current = current->iNext; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
207 |
} |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
208 |
// Critical Area End |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
209 |
iSemaphore.Signal(); |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
210 |
return payload; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
211 |
} |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
212 |
|
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
213 |
// End of File |