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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\sfat\sl_dir_cache.inl
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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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#ifndef SL_DIR_CACHE_INL
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#define SL_DIR_CACHE_INL
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#include "sl_dir_cache.h"
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/**
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Get function of TDynamicDirCachePage.
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@return TInt64 the starting media address of the page content.
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*/
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TInt64 TDynamicDirCachePage::StartPos() const
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{
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return iStartMedPos;
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}
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/**
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Get function of TDynamicDirCachePage.
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@return TUint8* the starting ram content of the page content.
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*/
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TUint8* TDynamicDirCachePage::StartPtr() const
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{
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return iStartRamAddr;
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}
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/**
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Set function of TDynamicDirCachePage.
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@param aPtr starting RAM Ptr that holds the cache page data.
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*/
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void TDynamicDirCachePage::SetStartPtr(TUint8* aPtr)
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{
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iStartRamAddr = aPtr;
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}
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/**
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Set function of TDynamicDirCachePage.
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@param aIsValid boolean value to set validity of the page content.
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*/
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void TDynamicDirCachePage::SetValid(TBool aIsValid)
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{
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iValid = aIsValid;
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}
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/**
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Get function of TDynamicDirCachePage.
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@return TBool boolean value that indicates validity of the page content.
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*/
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TBool TDynamicDirCachePage::IsValid() const
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{
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return iValid;
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}
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/**
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Set function of TDynamicDirCachePage.
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@param aLocked flag that sets if the page is locked or not.
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*/
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void TDynamicDirCachePage::SetLocked(TBool aLocked)
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{
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iLocked = aLocked;
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}
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/**
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Get function of TDynamicDirCachePage.
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@return TBool boolean value that indicates if the page is locked.
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*/
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TBool TDynamicDirCachePage::IsLocked() const
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{
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return iLocked;
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}
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/**
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Set function of TDynamicDirCachePage.
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@param aType set page type: EUnknown, ELocked, EUnlocked or EActivePage.
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*/
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void TDynamicDirCachePage::SetPageType(TDynamicDirCachePage::TPageType aType)
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{
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iType = aType;
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}
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/**
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Get function of TDynamicDirCachePage.
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@return TPageType get page type: EUnknown, ELocked, EUnlocked or EActivePage.
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*/
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TDynamicDirCachePage::TPageType TDynamicDirCachePage::PageType()
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{
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return iType;
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}
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/**
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Get function of TDynamicDirCachePage.
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@return TUint32 page size in bytes.
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*/
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TUint32 TDynamicDirCachePage::PageSizeInBytes() const
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{
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return 1 << iOwnerCache->PageSizeInBytesLog2();
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}
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/**
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Deque the page from its queue.
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@see TDblQueLink::Deque()
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*/
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void TDynamicDirCachePage::Deque()
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{
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iLink.Deque();
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}
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/**
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Get function of TDynamicDirCachePage.
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@return TUint32 page size in segments.
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*/
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TUint32 TDynamicDirCachePage::PageSizeInSegs() const
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{
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return iOwnerCache->PageSizeInSegs();
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}
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/**
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Interpret the media address into ram address.
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@param aPos the media address to be interpreted
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@return TUint8* the ram content pointer that contains that media content.
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*/
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TUint8* TDynamicDirCachePage::PtrInPage(TInt64 aPos) const
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{
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ASSERT(PosCachedInPage(aPos));
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return iStartRamAddr + (((TUint32)aPos - (TUint32)iStartMedPos) & (PageSizeInBytes() - 1));
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}
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/**
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Query function, to check if the media address is contained in the page.
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@param aPos the media address to be queried.
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@return TBool ETrue if the media address is cached in the page, otherwise EFalse.
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*/
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TBool TDynamicDirCachePage::PosCachedInPage(TInt64 aPos) const
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{
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return (aPos >= iStartMedPos && aPos < iStartMedPos + PageSizeInBytes());
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}
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/**
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Reset the media address to 0, invalidate page content.
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*/
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void TDynamicDirCachePage::ResetPos()
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{
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iStartMedPos = 0;
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SetValid(EFalse);
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}
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/**
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Set page starting media address, invalidate page content.
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@param aPos the new media address to be set.
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*/
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void TDynamicDirCachePage::SetPos(TInt64 aPos)
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{
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iStartMedPos = aPos;
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SetValid(EFalse);
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return;
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}
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//========================================================================
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/**
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Calculate the page starting media address, aligned with page size.
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@param aPos the media address to be aligned.
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@return TInt64 the aligned media address.
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*/
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TInt64 CDynamicDirCache::CalcPageStartPos(TInt64 aPos) const
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{
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ASSERT(aPos >= iCacheBasePos);
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return (((aPos - iCacheBasePos) >> iPageSizeLog2) << iPageSizeLog2) + iCacheBasePos;
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}
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/**
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Check if the cache has reached its limited page number.
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@return TBool ETrue if cache is full, otherwise EFalse.
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*/
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TBool CDynamicDirCache::CacheIsFull() const
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{
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// active page, locked page and unlocked page
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return (iLockedQCount + iUnlockedQCount + 1 >= iMaxSizeInPages);
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}
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/**
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Return the maximum allowed page number of the cache.
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*/
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TUint32 CDynamicDirCache::MaxCacheSizeInPages() const
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{
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return iMaxSizeInPages;
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}
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#endif //SL_DIR_CACHE_INL
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