// Copyright (c) 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: Asynchronous allocation support to allocate shared buffer(s)

//

#ifndef __COMMSBUFASYNCREQUEST_H__

#define __COMMSBUFASYNCREQUEST_H__

#include <e32base.h>

#include <es_commsbuf.h>

#include <comms-infras/commsbufq.h>

class RCommsBufChain;

class CCommsBufAsyncRequest;

/**

Class that specialises the allocation of RCommsBuf asynchronously.

@publishedPartner

*/

class RCommsBufAsyncRequest

	{

    friend class CSystemSharedBufPond;  

	friend class RCommsBufPond;

	friend class CMBufManager;

	friend class RMBufAsyncRequest;

	public:

	IMPORT_C RCommsBufAsyncRequest();

	IMPORT_C ~RCommsBufAsyncRequest();

    IMPORT_C TInt Open(TCommsBufAllocator& aAllocator);

    IMPORT_C void Close();

	IMPORT_C void Alloc(RCommsBufChain& aChain, TInt aSize, TRequestStatus& aStatus);

	IMPORT_C void Alloc(RCommsBufChain& aChain, TInt aSize, TInt aMinSize, TInt aMaxSize, TRequestStatus& aStatus);

	IMPORT_C void Cancel();

	protected:

	IMPORT_C void Complete(TInt aCode);	

	private:

    IMPORT_C RCommsBufAsyncRequest(CCommsBufAsyncRequest* aImpl);

	private:

	CCommsBufAsyncRequest*     iAsyncReqImpl;

	};

#endif // __COMMSBUFASYNCREQUEST_H__