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116 lines
3.0 KiB
C++
116 lines
3.0 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2004-2011 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#ifndef PstreamReduceOps_H
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#define PstreamReduceOps_H
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#include "Pstream.H"
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#include "ops.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Reduce operation with user specified communication schedule
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template <class T, class BinaryOp>
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void reduce
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(
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const List<UPstream::commsStruct>& comms,
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T& Value,
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const BinaryOp& bop,
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const int tag
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)
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{
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Pstream::gather(comms, Value, bop, tag);
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Pstream::scatter(comms, Value, tag);
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}
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// Reduce using either linear or tree communication schedule
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template <class T, class BinaryOp>
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void reduce
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(
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T& Value,
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const BinaryOp& bop,
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const int tag = Pstream::msgType()
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)
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{
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if (UPstream::nProcs() < UPstream::nProcsSimpleSum)
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{
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reduce(UPstream::linearCommunication(), Value, bop, tag);
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}
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else
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{
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reduce(UPstream::treeCommunication(), Value, bop, tag);
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}
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}
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// Reduce using either linear or tree communication schedule
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template <class T, class BinaryOp>
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T returnReduce
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(
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const T& Value,
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const BinaryOp& bop,
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const int tag = Pstream::msgType()
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)
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{
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T WorkValue(Value);
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if (UPstream::nProcs() < UPstream::nProcsSimpleSum)
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{
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reduce(UPstream::linearCommunication(), WorkValue, bop, tag);
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}
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else
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{
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reduce(UPstream::treeCommunication(), WorkValue, bop, tag);
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}
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return WorkValue;
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}
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// Insist there is a specialisation for the reduction of a scalar
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void reduce
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(
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scalar& Value,
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const sumOp<scalar>& bop,
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const int tag = Pstream::msgType()
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);
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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