SegStreamAllocation.h

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/*
// $Id: //open/dev/fennel/segment/SegStreamAllocation.h#6 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2006-2009 The Eigenbase Project
// Copyright (C) 2006-2009 SQLstream, Inc.
// Copyright (C) 2006-2009 LucidEra, Inc.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef Fennel_SegStreamAllocation_Included
#define Fennel_SegStreamAllocation_Included

#include "fennel/common/ClosableObject.h"

FENNEL_BEGIN_NAMESPACE

class FENNEL_SEGMENT_EXPORT SegStreamAllocation
    : public ClosableObject
{
    BlockNum nPagesWritten;

    SharedSegOutputStream pSegOutputStream;

    SharedSegInputStream pSegInputStream;

protected:
    // implement ClosableObject
    virtual void closeImpl();

public:
    static SharedSegStreamAllocation newSegStreamAllocation();

    explicit SegStreamAllocation();

    void beginWrite(SharedSegOutputStream pSegOutputStreamInit);

    void endWrite();

    SharedSegInputStream const &getInputStream() const;

    BlockNum getWrittenPageCount() const;
};

FENNEL_END_NAMESPACE

#endif

// End SegStreamAllocation.h

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