Teuchos_RawMPITraits.hpp

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00001 // @HEADER
00002 // ***********************************************************************
00003 // 
00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 // @HEADER
00028 
00029 // ////////////////////////////////////////////////////////////////////////
00030 // Teuchos_RawMPITraits.hpp
00031 
00032 #ifndef TEUCHOS_RAW_MPI_TRAITS_H
00033 #define TEUCHOS_RAW_MPI_TRAITS_H
00034 
00035 #include "Teuchos_ConfigDefs.hpp"
00036 
00041 namespace Teuchos {
00042 
00044 
00054 template <class T> class RawMPITraits {
00055 public:
00057   static MPI_Datatype type() { bool *junk1; T *junk2 = &junk1; return MPI_DATATYPE_NULL; } // Should not compile!
00058 };
00059 
00060 #ifndef DOXYGEN_SHOULD_SKIP_THIS
00061 
00062 
00064 template <> class RawMPITraits<char> {
00065 public:
00067   static MPI_Datatype type() { return MPI_CHAR; }
00068 };
00069 
00071 
00073 template <> class RawMPITraits<int> {
00074 public:
00076   static MPI_Datatype type() { return MPI_INT; }
00077 };
00078 
00080 
00082 template <> class RawMPITraits<float> {
00083 public:
00085   static MPI_Datatype type() { return MPI_FLOAT; }
00086 };
00087 
00089 
00091 template <> class RawMPITraits<double> {
00092 public:
00094   static MPI_Datatype type() { return MPI_DOUBLE; }
00095 };
00096 
00098 
00100 template <class T> class RawMPITraits<std::complex<T> > {
00101 public:
00103   static MPI_Datatype type() { buildType(); return type_; }
00104 private:
00105   static void buildType() {
00106     if(type_==MPI_DATATYPE_NULL)
00107       MPI_Type_contiguous( 2, RawMPITraits<T>::type(), &type_ );
00108   }
00109   static MPI_Datatype type_;
00110 };
00111 
00112 template <class T> MPI_Datatype RawMPITraits<std::complex<T> >::type_ = MPI_DATATYPE_NULL;
00113 
00114 #endif // DOXYGEN_SHOULD_SKIP_THIS
00115 
00116 } // namespace Teuchos
00117 
00118 #endif // TEUCHOS_RAW_MPI_TRAITS_H

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