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 #ifndef TEUCHOS_DEFAULT_COMM_HPP 00030 #define TEUCHOS_DEFAULT_COMM_HPP 00031 00032 #include "Teuchos_RCP.hpp" 00033 #include "Teuchos_DefaultSerialComm.hpp" 00034 #ifdef HAVE_MPI 00035 # include "Teuchos_DefaultMpiComm.hpp" 00036 #endif 00037 00038 namespace Teuchos { 00039 00047 template<typename Ordinal> 00048 class DefaultComm { 00049 public: 00050 00056 static Teuchos::RCP<const Comm<Ordinal> > getComm(); 00057 00060 static Teuchos::RCP<const Comm<Ordinal> > 00061 getDefaultSerialComm( const Teuchos::RCP<const Comm<Ordinal> > &comm ); 00062 00063 private: 00064 00065 static Teuchos::RCP<const Comm<Ordinal> > comm_; 00066 static Teuchos::RCP<const Comm<Ordinal> > defaultSerialComm_; 00067 00068 }; 00069 00070 // /////////////////////////// 00071 // Template Implementations 00072 00073 template<typename Ordinal> 00074 Teuchos::RCP<const Teuchos::Comm<Ordinal> > 00075 DefaultComm<Ordinal>::getComm() 00076 { 00077 if(!comm_.get()) { 00078 #ifdef HAVE_MPI 00079 comm_ = rcp(new MpiComm<Ordinal>(opaqueWrapper((MPI_Comm)MPI_COMM_WORLD))); 00080 #else // HAVE_MPI 00081 comm_ = rcp(new SerialComm<Ordinal>()); 00082 #endif // HAVE_MPI 00083 } 00084 return comm_; 00085 } 00086 00087 template<typename Ordinal> 00088 Teuchos::RCP<const Teuchos::Comm<Ordinal> > 00089 DefaultComm<Ordinal>::getDefaultSerialComm( 00090 const Teuchos::RCP<const Comm<Ordinal> > &comm 00091 ) 00092 { 00093 if( comm.get() ) 00094 return comm; 00095 else 00096 return defaultSerialComm_; 00097 } 00098 00099 template<typename Ordinal> 00100 Teuchos::RCP<const Teuchos::Comm<Ordinal> > 00101 DefaultComm<Ordinal>::comm_ = Teuchos::null; 00102 00103 template<typename Ordinal> 00104 Teuchos::RCP<const Teuchos::Comm<Ordinal> > 00105 DefaultComm<Ordinal>::defaultSerialComm_ 00106 = Teuchos::rcp(new Teuchos::SerialComm<Ordinal>()); 00107 00108 } // namespace Teuchos 00109 00110 #endif // TEUCHOS_DEFAULT_COMM_HPP