--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfat32/sl_dir_cache.inl Mon Dec 21 16:14:42 2009 +0000
@@ -0,0 +1,209 @@
+// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// f32\sfat\sl_dir_cache.inl
+//
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#ifndef SL_DIR_CACHE_INL
+#define SL_DIR_CACHE_INL
+
+#include "sl_dir_cache.h"
+
+/**
+Get function of TDynamicDirCachePage.
+@return TInt64 the starting media address of the page content.
+*/
+TInt64 TDynamicDirCachePage::StartPos() const
+ {
+ return iStartMedPos;
+ }
+
+/**
+Get function of TDynamicDirCachePage.
+@return TUint8* the starting ram content of the page content.
+*/
+TUint8* TDynamicDirCachePage::StartPtr() const
+ {
+ return iStartRamAddr;
+ }
+
+/**
+Set function of TDynamicDirCachePage.
+@param aPtr starting RAM Ptr that holds the cache page data.
+*/
+void TDynamicDirCachePage::SetStartPtr(TUint8* aPtr)
+ {
+ iStartRamAddr = aPtr;
+ }
+
+/**
+Set function of TDynamicDirCachePage.
+@param aIsValid boolean value to set validity of the page content.
+*/
+void TDynamicDirCachePage::SetValid(TBool aIsValid)
+ {
+ iValid = aIsValid;
+ }
+
+/**
+Get function of TDynamicDirCachePage.
+@return TBool boolean value that indicates validity of the page content.
+*/
+TBool TDynamicDirCachePage::IsValid() const
+ {
+ return iValid;
+ }
+
+/**
+Set function of TDynamicDirCachePage.
+@param aLocked flag that sets if the page is locked or not.
+*/
+void TDynamicDirCachePage::SetLocked(TBool aLocked)
+ {
+ iLocked = aLocked;
+ }
+
+/**
+Get function of TDynamicDirCachePage.
+@return TBool boolean value that indicates if the page is locked.
+*/
+TBool TDynamicDirCachePage::IsLocked() const
+ {
+ return iLocked;
+ }
+
+/**
+Set function of TDynamicDirCachePage.
+@param aType set page type: EUnknown, ELocked, EUnlocked or EActivePage.
+*/
+void TDynamicDirCachePage::SetPageType(TDynamicDirCachePage::TPageType aType)
+ {
+ iType = aType;
+ }
+
+/**
+Get function of TDynamicDirCachePage.
+@return TPageType get page type: EUnknown, ELocked, EUnlocked or EActivePage.
+*/
+TDynamicDirCachePage::TPageType TDynamicDirCachePage::PageType()
+ {
+ return iType;
+ }
+
+/**
+Get function of TDynamicDirCachePage.
+@return TUint32 page size in bytes.
+*/
+TUint32 TDynamicDirCachePage::PageSizeInBytes() const
+ {
+ return 1 << iOwnerCache->PageSizeInBytesLog2();
+ }
+
+/**
+Deque the page from its queue.
+@see TDblQueLink::Deque()
+*/
+void TDynamicDirCachePage::Deque()
+ {
+ iLink.Deque();
+ }
+
+/**
+Get function of TDynamicDirCachePage.
+@return TUint32 page size in segments.
+*/
+TUint32 TDynamicDirCachePage::PageSizeInSegs() const
+ {
+ return iOwnerCache->PageSizeInSegs();
+ }
+
+/**
+Interpret the media address into ram address.
+@param aPos the media address to be interpreted
+@return TUint8* the ram content pointer that contains that media content.
+*/
+TUint8* TDynamicDirCachePage::PtrInPage(TInt64 aPos) const
+ {
+ ASSERT(PosCachedInPage(aPos));
+ return iStartRamAddr + (((TUint32)aPos - (TUint32)iStartMedPos) & (PageSizeInBytes() - 1));
+ }
+
+/**
+Query function, to check if the media address is contained in the page.
+@param aPos the media address to be queried.
+@return TBool ETrue if the media address is cached in the page, otherwise EFalse.
+*/
+TBool TDynamicDirCachePage::PosCachedInPage(TInt64 aPos) const
+ {
+ return (aPos >= iStartMedPos && aPos < iStartMedPos + PageSizeInBytes());
+ }
+
+/**
+Reset the media address to 0, invalidate page content.
+*/
+void TDynamicDirCachePage::ResetPos()
+ {
+ iStartMedPos = 0;
+ SetValid(EFalse);
+ }
+
+/**
+Set page starting media address, invalidate page content.
+@param aPos the new media address to be set.
+*/
+void TDynamicDirCachePage::SetPos(TInt64 aPos)
+ {
+ iStartMedPos = aPos;
+ SetValid(EFalse);
+ return;
+ }
+
+
+//========================================================================
+/**
+Calculate the page starting media address, aligned with page size.
+@param aPos the media address to be aligned.
+@return TInt64 the aligned media address.
+*/
+TInt64 CDynamicDirCache::CalcPageStartPos(TInt64 aPos) const
+ {
+ ASSERT(aPos >= iCacheBasePos);
+ return (((aPos - iCacheBasePos) >> iPageSizeLog2) << iPageSizeLog2) + iCacheBasePos;
+ }
+
+/**
+Check if the cache has reached its limited page number.
+@return TBool ETrue if cache is full, otherwise EFalse.
+*/
+TBool CDynamicDirCache::CacheIsFull() const
+ {
+ // active page, locked page and unlocked page
+ return (iLockedQCount + iUnlockedQCount + 1 >= iMaxSizeInPages);
+ }
+
+/**
+Return the maximum allowed page number of the cache.
+*/
+TUint32 CDynamicDirCache::MaxCacheSizeInPages() const
+ {
+ return iMaxSizeInPages;
+ }
+
+#endif //SL_DIR_CACHE_INL
+