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// Copyright (c) 2008-2009 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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// f32\sfile\sf_memory_man.cpp
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//
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//
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/**
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@file
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@internalTechnology
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*/
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#include <e32std.h>
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#include <e32std_private.h>
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#include "sf_std.h"
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#include <e32uid.h>
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#include <e32wins.h>
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#include <f32file.h>
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#include <hal.h>
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#include "sf_memory_man.h"
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#include "sf_memory_client.h"
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/**
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Destructor of the CCacheMemoryManager, need to destroy all registered clients.
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*/
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CCacheMemoryManager::~CCacheMemoryManager()
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{
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for (TInt i = 0; i < iRegisteredClients.Count(); i++)
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{
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iRegisteredClients[i]->Reset();
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delete iRegisteredClients[i];
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}
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iRegisteredClients.Close();
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}
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/**
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Static factory function of CCacheMemoryManager
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@param aCacheSize the total size of the virtual address space
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*/
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CCacheMemoryManager* CCacheMemoryManager::NewL(TInt aCacheSize)
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{
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CCacheMemoryManager* cacheMemoryManager = new (ELeave) CCacheMemoryManager(aCacheSize);
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CleanupStack::PushL(cacheMemoryManager);
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cacheMemoryManager->ConstructL();
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CleanupStack::Pop(1, cacheMemoryManager);
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return cacheMemoryManager;
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}
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/**
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Constructor of CCacheMemoryManager
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@param aMaxSize the total size of the virtual address space
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*/
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CCacheMemoryManager::CCacheMemoryManager(TUint32 aMaxSize)
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:iBase(NULL),
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iSizeInBytes(aMaxSize),
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iCurrentOffsetMark(0)
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{
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}
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/**
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Second phase constructor of CCacheMemoryManager.
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Creates RChunk object and sets low memory threshold.
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*/
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void CCacheMemoryManager::ConstructL()
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{
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// calculate the low-memory threshold below which we fail any attempt to allocate memory
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TMemoryInfoV1Buf meminfo;
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TInt r = UserHal::MemoryInfo(meminfo);
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ASSERT(r==KErrNone);
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User::LeaveIfError(r);
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iLowMemoryThreshold = (meminfo().iTotalRamInBytes * TGlobalCacheMemorySettings::LowMemoryThreshold()) / 100;
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TChunkCreateInfo createInfo;
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createInfo.SetCache(iSizeInBytes);
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createInfo.SetOwner(EOwnerProcess);
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r = iChunk.Create(createInfo);
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ASSERT(r==KErrNone);
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User::LeaveIfError(r);
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UserSvr::RegisterTrustedChunk(iChunk.Handle());
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iBase = iChunk.Base();
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iRegisteredClients.ReserveL(10);
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__PRINT3(_L("CCacheMemoryManager::ConstructL(lowMem=%d, iSize=%d, base=0x%lx)"), iLowMemoryThreshold, iSizeInBytes, iBase);
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}
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/**
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Connect or register a client.
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Note: callers of this function should be constructor of various caches, it is their resposibility
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to make sure that parameters are sensible when calling this function
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@internalTechnology
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@released
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@param aClientName an identifier of the client to be connected
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@param aMinSizeInSegs minimum client size in segments
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@param aMaxSizeInSegs maximum client size in segments
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@return CCacheMemoryClient* pointer to the client that connected, or NULL if parameters are not valid.
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@leave if no memory
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*/
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EXPORT_C CCacheMemoryClient* CCacheMemoryManager::ConnectClientL(const TDesC& aClientName, TUint32 aMinSizeInSegs, TUint32 aMaxSizeInSegs)
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{
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__PRINT3(_L("CCacheMemoryManager::ConnectClientL([%S], minSeg=%d, maxSeg=%d)"), &aClientName, aMinSizeInSegs, aMaxSizeInSegs);
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// search for existing clients by name
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for (TInt i = 0; i < iRegisteredClients.Count(); i++)
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{
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if (aClientName.Compare(iRegisteredClients[i]->Name()) == 0)
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{
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ASSERT(iRegisteredClients[i]->iTouchedRegionFlag == 0);
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__PRINT1(_L("CCacheMemoryManager::ConnectClientL: [%S] found!"), &aClientName);
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return iRegisteredClients[i];
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}
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}
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// if it is a new drive/file system who wants to connect, create a new client for it
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// parameter validation
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ASSERT(iSizeInBytes > iCurrentOffsetMark + (aMaxSizeInSegs << SegmentSizeInBytesLog2()));
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if (iSizeInBytes < iCurrentOffsetMark + (aMaxSizeInSegs << SegmentSizeInBytesLog2()))
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{
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ASSERT(0);
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User::Leave(KErrArgument);
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}
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// note: client creation may leave under OOM conditions
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CCacheMemoryClient* client = CCacheMemoryClient::NewL(*this, aClientName, iCurrentOffsetMark, aMinSizeInSegs, aMaxSizeInSegs);
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// if error happens during client registration, the client will be deleted
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// this may leave under OOM conditions
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TInt err = iRegisteredClients.Append(client);
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if (err != KErrNone)
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{
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ASSERT(0);
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delete client;
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client = NULL;
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User::Leave(err);
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}
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// record current offset mark for next client
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iCurrentOffsetMark += (aMaxSizeInSegs << SegmentSizeInBytesLog2());
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return client;
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}
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/**
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Commit a contiguous set of segments.
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@param aStartRamAddr the start ram address of the region to be committed.
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@param aSegmentCount the segment number of the contiguous region to be committed.
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@return TInt KErrNone if succeeded, KErrNoMemory if passed low memory threshold, otherwise a system-wide error code.
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*/
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TInt CCacheMemoryManager::AllocateAndLockSegments(TUint8* aStartRamAddr, TInt aSegmentCount)
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{
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__PRINT2(_L("CCacheMemoryManager::AllocateAndLockSegments(base=0x%x, seg=%d)"), aStartRamAddr, aSegmentCount);
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TMemoryInfoV1Buf meminfo;
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TInt r = UserHal::MemoryInfo(meminfo);
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__ASSERT_DEBUG(r==KErrNone,Fault(EMemoryInfoFailed));
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if (r != KErrNone)
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{
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return r;
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}
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if (isMemoryLow || (meminfo().iFreeRamInBytes < iLowMemoryThreshold))
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{
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__PRINT(_L("CCacheMemoryManager: free RAM below threshold !!!"));
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return KErrNoMemory;
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}
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return Commit(aStartRamAddr, aSegmentCount);
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}
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/**
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Notify the change of memory status
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@param aIsMemoryLow the flag that sets current memory status
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*/
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void CCacheMemoryManager::FreeMemoryChanged(TBool aIsMemoryLow)
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{
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isMemoryLow = aIsMemoryLow;
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}
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/**
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Decommit a contiguous set of segments.
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@param aStartRamAddr the start ram address of the region to be decommitted.
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@param aSegmentCount the segment number of the contiguous region to be decommitted.
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@return TInt KErrNone if succeeded, otherwise a system-wide error code.
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*/
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TInt CCacheMemoryManager::DecommitSegments(TUint8* aStartRamAddr, TUint32 aSegmentCount)
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{
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return Decommit(aStartRamAddr, aSegmentCount);
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}
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/**
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Lock a contiguous set of segments.
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@param aStartRamAddr the start ram address of the region to be locked.
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@param aSegmentCount the segment number of the contiguous region to be locked.
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@return TInt KErrNone if succeeded, otherwise a system-wide error code.
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*/
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TInt CCacheMemoryManager::LockSegments(TUint8* aStartRamAddr, TUint32 aSegmentCount)
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{
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return Lock(aStartRamAddr, aSegmentCount);
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}
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/**
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Unlock a contiguous set of segments.
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@param aStartRamAddr the start ram address of the region to be unlocked.
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@param aSegmentCount the segment number of the contiguous region to be unlocked.
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@return TInt KErrNone if succeeded, otherwise a system-wide error code.
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*/
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TInt CCacheMemoryManager::UnlockSegments(TUint8* aStartRamAddr, TUint32 aSegmentCount)
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{
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return Unlock(aStartRamAddr, aSegmentCount);
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}
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/**
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Commit a contiguous set of segments.
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@param aStartRamAddr the start ram address of the region to be committed.
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@param aSegmentCount the segment number of the contiguous region to be committed.
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@return TInt KErrNone if succeeded, otherwise a system-wide error code.
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*/
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TInt CCacheMemoryManager::Commit(TUint8* aStartRamAddr, TInt aSegmentCount)
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{
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TInt offset = aStartRamAddr - iBase;
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TInt r = iChunk.Commit(offset, aSegmentCount << KSegmentSizeLog2);
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return r;
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}
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/**
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Actual implementation of DecommitSegments().
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@see CCacheMemoryManager::DecommitSegments().
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*/
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TInt CCacheMemoryManager::Decommit(TUint8* aStartRamAddr, TInt aSegmentCount)
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{
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return iChunk.Decommit(aStartRamAddr - iBase, aSegmentCount << KSegmentSizeLog2);
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}
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/**
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Actual implementation of UnlockSegments().
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@see CCacheMemoryManager::UnlockSegments().
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*/
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TInt CCacheMemoryManager::Unlock(TUint8* aStartRamAddr, TInt aSegmentCount)
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{
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TInt r = iChunk.Unlock(aStartRamAddr - iBase, aSegmentCount << KSegmentSizeLog2);
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return r;
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}
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/**
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Actual implementation of LockSegments().
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@see CCacheMemoryManager::LockSegments().
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*/
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TInt CCacheMemoryManager::Lock(TUint8* aStartRamAddr, TInt aSegmentCount)
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{
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return iChunk.Lock(aStartRamAddr - iBase, aSegmentCount << KSegmentSizeLog2);
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}
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//=====================================================================
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TUint8* CCacheMemoryManager::Base()
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{
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return iChunk.Base();
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}
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/**
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Get function, returns log2 value of a segment size in bytes.
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@internalTechnology
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@released
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*/
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EXPORT_C TUint CCacheMemoryManager::SegmentSizeInBytesLog2() const
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{
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return KSegmentSizeLog2;
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}
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//=============================================================================
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/**
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The singleton of global cache memory manager
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*/
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CCacheMemoryManager* CCacheMemoryManagerFactory::iCacheMemoryManager = NULL;
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/**
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Global factory function of CCacheMemoryManager.
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*/
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void CCacheMemoryManagerFactory::CreateL()
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{
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iCacheMemoryManager = CCacheMemoryManager::NewL(TGlobalCacheMemorySettings::CacheSize());
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}
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/**
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Global get function of CCacheMemoryManager.
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@internalTechnology
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@released
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*/
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EXPORT_C CCacheMemoryManager* CCacheMemoryManagerFactory::CacheMemoryManager()
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{
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return iCacheMemoryManager;
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}
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/**
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Global destroy function of CCacheMemoryManager.
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*/
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void CCacheMemoryManagerFactory::Destroy()
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{
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delete iCacheMemoryManager;
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iCacheMemoryManager = NULL;
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}
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//=============================================================================
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const TInt KByteToByteShift = 10;
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TInt32 TGlobalCacheMemorySettings::iCacheSizeInBytes = KDefaultGlobalCacheMemorySize << KByteToByteShift;
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TInt32 TGlobalCacheMemorySettings::iLowMemoryThreshold = KDefaultLowMemoryThreshold;
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_LIT8(KLitSectionNameCacheMemory,"CacheMemory");
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/**
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Read ESTART.TXT file for global cache memory settings
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*/
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void TGlobalCacheMemorySettings::ReadPropertiesFile()
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{
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// Get size of cache in kilobytes
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TInt32 cacheSizeInKBytes;
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if (F32Properties::GetInt(KLitSectionNameCacheMemory, _L8("GlobalCacheMemorySize"), cacheSizeInKBytes))
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{
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iCacheSizeInBytes = cacheSizeInKBytes << KByteToByteShift;
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}
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|
333 |
// Get low memory threshold
|
sl@0
|
334 |
TInt32 lowMemoryThreshold;
|
sl@0
|
335 |
if (F32Properties::GetInt(KLitSectionNameCacheMemory, _L8("LowMemoryThreshold"), lowMemoryThreshold))
|
sl@0
|
336 |
iLowMemoryThreshold = lowMemoryThreshold;
|
sl@0
|
337 |
}
|
sl@0
|
338 |
|
sl@0
|
339 |
TInt TGlobalCacheMemorySettings::CacheSize()
|
sl@0
|
340 |
{
|
sl@0
|
341 |
return iCacheSizeInBytes;
|
sl@0
|
342 |
}
|
sl@0
|
343 |
|
sl@0
|
344 |
TInt TGlobalCacheMemorySettings::LowMemoryThreshold()
|
sl@0
|
345 |
{
|
sl@0
|
346 |
return iLowMemoryThreshold;
|
sl@0
|
347 |
}
|
sl@0
|
348 |
|
sl@0
|
349 |
|