author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 19 Apr 2010 14:01:53 +0300 | |
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permissions | -rw-r--r-- |
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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: ?Description |
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* |
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*/ |
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|
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|
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#include "ircachecleanup.h" |
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#include "ircachemgmt.h" |
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#include "irdebug.h" |
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|
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//Constant decided on the rate of data collection in cache in a high speed connection |
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/* const TUint KConstantForCleanupFrequency = KCacheLimitSize*90; */ |
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//maximum time interval = 2147483648/KCacheLimitSize |
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const TUint KIntervalPerByte =2048 ; |
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// |
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const TInt KMinCleanupInterval = 2*60*1000000;//2 mins |
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const TInt KMaxCleanupInterval = 2147483647;//~36 mins for 1MB data |
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// --------------------------------------------------------------------------- |
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//Two-phased constructor. |
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// --------------------------------------------------------------------------- |
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// |
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CIRCacheCleanup* CIRCacheCleanup::NewL(CIRCacheMgmt& aCacheDb) |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::NewL - Entering" ); |
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CIRCacheCleanup* self = new(ELeave)CIRCacheCleanup(aCacheDb); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(self); |
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IRLOG_DEBUG( "CIRCacheCleanup::NewL - Exiting" ); |
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return self; |
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} |
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// --------------------------------------------------------------------------- |
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// Destructor. |
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// --------------------------------------------------------------------------- |
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// |
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CIRCacheCleanup::~CIRCacheCleanup() |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::~CIRCacheCleanup - Entering" ); |
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Cancel(); |
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IRLOG_DEBUG( "CIRCacheCleanup::~CIRCacheCleanup - Exiting" ); |
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} |
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// --------------------------------------------------------------------------- |
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//Default Constructor |
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// --------------------------------------------------------------------------- |
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// |
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CIRCacheCleanup::CIRCacheCleanup(CIRCacheMgmt& aCacheDb): |
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CTimer( CActive::EPriorityLow ), iDatabase( aCacheDb ) |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::CIRCacheCleanup - Entering" ); |
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CActiveScheduler::Add( this ); |
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IRLOG_DEBUG( "CIRCacheCleanup::CIRCacheCleanup - Exiting" ); |
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} |
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// --------------------------------------------------------------------------- |
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//Second-phase constructor. |
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// --------------------------------------------------------------------------- |
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// |
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void CIRCacheCleanup::ConstructL() |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::ConstructL - Entering" ); |
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CTimer::ConstructL(); |
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CheckStatusL(); |
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IRLOG_DEBUG( "CIRCacheCleanup::ConstructL - Exiting" ); |
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} |
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// --------------------------------------------------------------------------- |
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//Cleanup CacheDb if necessary |
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// --------------------------------------------------------------------------- |
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// |
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void CIRCacheCleanup::CleanupCacheDbL() |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::CleanupCacheDbL - Entering" ); |
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iDatabase.CheckSizeL(); |
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IRLOG_DEBUG( "CIRCacheCleanup::CleanupCacheDbL - Exiting" ); |
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} |
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// --------------------------------------------------------------------------- |
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//CheckStatus of CacheDb and do cleanup if necessary |
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// --------------------------------------------------------------------------- |
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// |
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void CIRCacheCleanup::CheckStatusL() |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::CheckStatusL - Entering" ); |
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TTimeIntervalMicroSeconds32 interval(GetCleanupInterval()); |
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After(interval); |
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CleanupCacheDbL(); |
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IRLOG_DEBUG( "CIRCacheCleanup::CheckStatusL - Exiting" ); |
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} |
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// --------------------------------------------------------------------------- |
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// CIRCacheCleanup::RunL(). |
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// --------------------------------------------------------------------------- |
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// |
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void CIRCacheCleanup::RunL() |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::RunL - Entering" ); |
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CheckStatusL(); |
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IRLOG_DEBUG( "CIRCacheCleanup::RunL - Exiting" ); |
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} |
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|
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// --------------------------------------------------------------------------- |
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// CIRCacheCleanup::GetCleanupInterval(). |
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// --------------------------------------------------------------------------- |
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// |
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TUint32 CIRCacheCleanup::GetCleanupInterval() |
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{ |
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IRLOG_DEBUG( "CIRCacheCleanup::GetCleanupInterval - Entering" ); |
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//formula derivation: |
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//Timeinterval of cleanup (T) is inversely proportional to the cache size(S) |
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//Minimum time interval for cleanup routine 2 min. |
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//Maximum time interval for cleanup routine ~35mins. |
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//timeintervalperbyte = (35-2)*60*1000000/1024*1024 |
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//TimeInterval = timeintervalperbyte*(MaxCacheLimit-CurrentCachesize) |
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|
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TInt interval =KIntervalPerByte * (KCacheLimitSize - iDatabase.CacheSize()); |
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//keep the value range bound |
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interval = Max(interval,KMinCleanupInterval); |
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interval = Min(interval,KMaxCleanupInterval); |
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IRLOG_DEBUG( "CIRCacheCleanup::GetCleanupInterval - Exiting" ); |
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return interval; |
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} |