65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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*/
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#ifndef ALGEBRAS_NESTEDRELATION2_BLOCKINGPROGRESSESTIMATOR_H_
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#define ALGEBRAS_NESTEDRELATION2_BLOCKINGPROGRESSESTIMATOR_H_
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#include "AlgebraTypes.h"
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#include "Algebra.h"
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#include "ProgressEstimator.h"
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#include "Nr2aLocalInfo.h"
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namespace nr2a {
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/*
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The "BlockingProgressEstimator"[2] can be used for Operators which do not work
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in a pipeline, but output their results when enarly finished (blocking
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operators).
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*/
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class BlockingProgressEstimator :
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public ProgressEstimator<Nr2aLocalInfo<BlockingProgressEstimator> >
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{
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public:
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BlockingProgressEstimator(const bool waitForFirstOnly = false);
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BlockingProgressEstimator(Word predecessor,
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const bool waitForFirstOnly = false);
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virtual ~BlockingProgressEstimator();
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virtual int requestProgress(Word* args, ProgressInfo* result,
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void* localInfo, const bool argsAvailable);
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static CostEstimation * Build();
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static CostEstimation * BuildWaitForFirstOnly();
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private:
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//void * m_predecessor;
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bool m_waitForFirstOnly;
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};
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} /* namespace nr2a */
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#endif /* ALGEBRAS_NESTEDRELATION2_BLOCKINGPROGRESSESTIMATOR_H_ */
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