// 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);

	}