// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of "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:

 //

 #include "UP_STD.H"

 #include <s32file.h>

 EXPORT_C RFilePagePool::RFilePagePool()

 /** Default constructor. */

 	{}

 EXPORT_C RFilePagePool::RFilePagePool(CPageCache& aCache)

 	: TCachePagePool(aCache)

 /** Constructor with a page cache for the pool.

 @param aCache Page cache for the pool */

 	{}

 EXPORT_C void RFilePagePool::Close()

 /** Flushes cached pages to the file, and closes the file. */

 	{

 	TCachePagePool::Flush();

 	Release();

 	}

 EXPORT_C void RFilePagePool::Release()

 /** Closes the file without flushing the cache. */

 	{

 	Purge();

 	iFile.Close();

 	}

 EXPORT_C TInt RFilePagePool::Flush()

 /** Flushes the page cache and the file.

 @return KErrNone if successful, otherwise another of the system-wide error 

 codes. */

 	{

 	TInt r=TCachePagePool::Flush();

 	if (r==KErrNone)

 		{

 		r=iFile.Flush();

 		}

 	return r;

 	}

 EXPORT_C void RFilePagePool::FlushL()

 /** Flushes the page cache and the file, leaving with a system-wide error code 

 if an error occurs. */

 	{

 	TCachePagePool::FlushL();

 	__LEAVE_IF_ERROR(iFile.Flush());

 	}

 EXPORT_C TPageRef RFilePagePool::ExtendL(const TAny* aPage,TPageReclamation)

 	{

 	TInt pos=0;

 	__LEAVE_IF_ERROR(iFile.Seek(ESeekEnd,pos));

 	__ASSERT_DEBUG(pos>=0,User::Invariant());

 	if (pos%KPoolPageSize!=0)

 		__LEAVE(KErrCorrupt);

 //

 	__LEAVE_IF_ERROR(iFile.Write(pos,TPtrC8((const TUint8*)aPage,KPoolPageSize)));

 	return TPageRef(pos/KPoolPageSize+1);

 	}

 EXPORT_C void RFilePagePool::WriteL(TPageRef aRef,const TAny* aPage,TPageChange)

 	{

 	TInt pos=(aRef.Value()-1)*KPoolPageSize;

 	__LEAVE_IF_ERROR(iFile.Write(pos,TPtrC8((const TUint8*)aPage,KPoolPageSize)));

 	}

 EXPORT_C void RFilePagePool::ReadL(TPageRef aRef,TAny* aPage)

 	{

 	TInt pos=(aRef.Value()-1)*KPoolPageSize;

 	TPtr8 ptr((TUint8*)aPage,KPoolPageSize);

 	__LEAVE_IF_ERROR(iFile.Read(pos,ptr));

 	if (ptr.Length()<KPoolPageSize)

 		__LEAVE(KErrEof);

 	}