userlibandfileserver/fileserver/sfat32/sl_fatcache.inl
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Sat, 20 Feb 2010 00:10:51 +0200
branchRCL_3
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parent 36 538db54a451d
child 269 d57b86b1867a
permissions -rw-r--r--
Revision: 201007 Kit: 201007
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// Copyright (c) 1998-2009 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\sfat\sl_fatcache.inl
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// 
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//
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/**
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 @file
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*/
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#ifndef SL_FAT_CACHE_INL
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#define SL_FAT_CACHE_INL
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//-----------------------------------------------------------------------------
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TUint32 CFatCacheBase::FatStartPos() const 
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    {
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    return iFatStartPos;
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    }
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TUint32 CFatCacheBase::FatSize() const 
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    {
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    return iFatSize;
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    }
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TFatType CFatCacheBase::FatType() const 
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    {
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    return iFatType;
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    }
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TBool CFatCacheBase::IsDirty() const 
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    {
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    return iDirty;
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    }
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void CFatCacheBase::SetDirty(TBool aDirty) 
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    {
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    iDirty = aDirty;
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    }
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TUint CFatCacheBase::NumFATs() const 
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    {
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    return iNumFATs;
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    }
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TUint CFatCacheBase::FAT_SectorSzLog2() const 
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    {
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    return iFatSecSzLog2;
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    }
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TUint CFatCacheBase::FAT_SectorSz() const 
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    {
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    return 1 << iFatSecSzLog2;
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    }
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TUint CFatCacheBase::FAT_ClusterSzLog2() const 
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    {
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    return iFatClustSzLog2;
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    }
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//-----------------------------------------------------------------------------
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/** @return number of FAT cache sectors in this fixed cache */
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TUint32 CFat12Cache::NumSectors() const   
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    {
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    return iSectorsInCache;
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    }
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//-----------------------------------------------------------------------------
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/** @return Log2(page size in bytes) */
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TUint CFatPagedCacheBase::PageSizeLog2() const 
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    {
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    return iPageSizeLog2;
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    }
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/** @return page size in bytes */
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TUint CFatPagedCacheBase::PageSize() const 
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    {
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    return Pow2(iPageSizeLog2);
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    }
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/** @return Log2(size of the logical sector of the page in bytes) */    
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TUint CFatPagedCacheBase::SectorSizeLog2() const 
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    {
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    return iSectorSizeLog2;
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    }
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/** @return number of the logical sector in the page */
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TUint CFatPagedCacheBase::SectorsInPage() const 
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    {
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    return Pow2(iPageSizeLog2 - iSectorSizeLog2);
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    }
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//-----------------------------------------------------------------------------
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TUint CFat16FixedCache::NumPages() const 
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    {
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    return (TUint)iPages.Count();
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    } 
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//-----------------------------------------------------------------------------
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/** @return  the index in the FAT table this page starts from */
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TUint32 CFatCachePageBase::StartFatIndex() const 
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    {
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    return iStartIndexInFAT;
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    }
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/** @return number of FAT entries in the page */
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TUint32 CFatCachePageBase::EntriesInPage() const 
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    {
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    return iFatEntriesInPage;
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    }
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/** @return page state */
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CFatCachePageBase::TState CFatCachePageBase::State() const
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    {
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    return iState;
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    }
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/** sets the state of the page */
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void CFatCachePageBase::SetState(TState aState)
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    {
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    iState = aState;
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    }
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/** @return ETrue if the page is dirty, i.e. contains non-flushed dirty sectors */
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TBool CFatCachePageBase::IsDirty() const
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    {
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    if(State() == EDirty)
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        {
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        ASSERT(iDirtySectors.HasBitsSet());
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        return ETrue;
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        }
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    else
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        {
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        ASSERT(!iDirtySectors.HasBitsSet());
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        return EFalse;
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        }
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    }
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/** @return  ETrue if the page data are valid */
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TBool CFatCachePageBase::IsValid() const
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    {
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    return (State() == EClean || State() == EDirty);
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    }
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/** force the page to the clean state */
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void CFatCachePageBase::SetClean()
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    {
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    iDirtySectors.Clear(); //-- clear dirty sectors bitmap
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    SetState(EClean);
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    }
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/** @return page size in bytes */
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TUint32 CFatCachePageBase::PageSize() const 
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    {
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    return iCache.PageSize();
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    }
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/** @return number of logical sectors in the page */
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TUint32 CFatCachePageBase::NumSectors() const 
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    {
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    return iCache.SectorsInPage();
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    }
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/** @return ETrue if the entry at aFatIndex belongs to this page */
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TBool CFatCachePageBase::IsEntryCached(TUint32 aFatIndex) const
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    {
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    return (aFatIndex >= iStartIndexInFAT && aFatIndex < iStartIndexInFAT+EntriesInPage());
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    } 
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//---------------------------------------------------------------------------------------------------------------------------------
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#endif //SL_FAT_CACHE_INL
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