127 lines
3.6 KiB
C
127 lines
3.6 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) 1991-2009 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 the
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Free Software Foundation; either version 2 of the License, or (at your
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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, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Description
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\*---------------------------------------------------------------------------*/
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#include "Gather.H"
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#include "IPstream.H"
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#include "OPstream.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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// Construct from component
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template <class T0>
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Gather<T0>::Gather(const T0& localData, const bool redistribute)
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:
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List<T0>(0),
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nProcs_(max(1, Pstream::nProcs()))
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{
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this->setSize(nProcs_);
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//
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// Collect sizes on all processor
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//
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if (Pstream::parRun())
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{
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if (Pstream::master())
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{
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this->operator[](0) = localData;
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// Receive data
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for
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(
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int slave = Pstream::firstSlave(), procIndex = 1;
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slave <= Pstream::lastSlave();
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slave++, procIndex++
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)
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{
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IPstream fromSlave(Pstream::scheduled, slave);
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fromSlave >> this->operator[](procIndex);
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}
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// Send data
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for
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(
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int slave = Pstream::firstSlave(), procIndex = 1;
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slave <= Pstream::lastSlave();
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slave++, procIndex++
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)
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{
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OPstream toSlave(Pstream::scheduled, slave);
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if (redistribute)
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{
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toSlave << *this;
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}
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else
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{
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// Dummy send just to balance sends/receives
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toSlave << 0;
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}
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}
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}
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else
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{
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// Slave: send my local data to master
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{
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OPstream toMaster(Pstream::scheduled, Pstream::masterNo());
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toMaster << localData;
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}
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// Receive data from master
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{
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IPstream fromMaster(Pstream::scheduled, Pstream::masterNo());
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if (redistribute)
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{
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fromMaster >> *this;
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}
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else
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{
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label dummy;
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fromMaster >> dummy;
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}
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}
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}
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}
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else
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{
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this->operator[](0) = localData;
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}
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// ************************************************************************* //
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