LcsClusterAccessBase.cpp

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/*
// $Id: //open/dev/fennel/lucidera/colstore/LcsClusterAccessBase.cpp#4 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Copyright (C) 2005-2009 The Eigenbase Project
//
// 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
*/

#include "fennel/common/CommonPreamble.h"
#include "fennel/lucidera/colstore/LcsClusterAccessBase.h"
#include "fennel/btree/BTreeWriter.h"
#include "fennel/tuple/TupleAccessor.h"

FENNEL_BEGIN_CPPFILE("$Id: //open/dev/fennel/lucidera/colstore/LcsClusterAccessBase.cpp#4 $");

LcsClusterAccessBase::LcsClusterAccessBase(
    BTreeDescriptor const &treeDescriptor)
{
    segmentAccessor = treeDescriptor.segmentAccessor;
    clusterLock.accessSegment(segmentAccessor);
    bTreeTupleData.compute(treeDescriptor.tupleDescriptor);
}

LcsRid LcsClusterAccessBase::readRid()
{
    return *reinterpret_cast<LcsRid const *> (bTreeTupleData[0].pData);
}

PageId LcsClusterAccessBase::readClusterPageId()
{
    return *reinterpret_cast<PageId const *> (bTreeTupleData[1].pData);
}

void LcsClusterAccessBase::setHdrOffsets(PConstLcsClusterNode pHdr)
{
    PBuffer p = (PBuffer) pHdr;

    lastVal = (uint16_t *) (p += sizeof(LcsClusterNode));
    firstVal = (uint16_t *) (p += sizeof(uint16_t) * nClusterCols);
    nVal = (uint *) (p += sizeof(uint16_t) * nClusterCols);
    delta = (uint16_t *) (p += sizeof(uint) * nClusterCols);
}

void LcsClusterAccessBase::unlockClusterPage()
{
    clusterLock.unlock();
}

FENNEL_END_CPPFILE("$Id: //open/dev/fennel/lucidera/colstore/LcsClusterAccessBase.cpp#4 $");

// End LcsClusterAccessBase.cpp

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