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00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2005 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software; you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by the 00013 Free Software Foundation; either version 2 of the License, or (at your 00014 option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM; if not, write to the Free Software Foundation, 00023 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00024 00025 Class 00026 Pstream 00027 00028 Description 00029 00030 \*---------------------------------------------------------------------------*/ 00031 00032 #ifndef PstreamReduceOps_H 00033 #define PstreamReduceOps_H 00034 00035 #include "Pstream.H" 00036 #include "ops.H" 00037 00038 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00039 00040 namespace Foam 00041 { 00042 00043 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00044 00045 // Reduce operation with user specified communication schedule 00046 template <class T, class BinaryOp> 00047 void reduce 00048 ( 00049 const List<Pstream::commsStruct>& comms, 00050 T& Value, 00051 const BinaryOp& bop 00052 ) 00053 { 00054 Pstream::gather(comms, Value, bop); 00055 Pstream::scatter(comms, Value); 00056 } 00057 00058 00059 // Reduce using either linear or tree communication schedule 00060 template <class T, class BinaryOp> 00061 void reduce 00062 ( 00063 T& Value, 00064 const BinaryOp& bop 00065 ) 00066 { 00067 if (Pstream::nProcs() < Pstream::nProcsSimpleSum) 00068 { 00069 reduce(Pstream::linearCommunication(), Value, bop); 00070 } 00071 else 00072 { 00073 reduce(Pstream::treeCommunication(), Value, bop); 00074 } 00075 } 00076 00077 00078 // Insist there is a specialisation for the reduction of a scalar 00079 void reduce(scalar& Value, const sumOp<scalar>& bop); 00080 00081 00082 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00083 00084 } // End namespace Foam 00085 00086 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00087 00088 #endif 00089 00090 // ************************************************************************* //