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_GLOBAL_MPI_SESSION_HPP 00030 #define TEUCHOS_GLOBAL_MPI_SESSION_HPP 00031 00036 #include "Teuchos_ConfigDefs.hpp" 00037 00038 #ifdef HAVE_MPI 00039 #include "mpi.h" 00040 #endif 00041 00042 namespace Teuchos { 00043 00052 class GlobalMPISession 00053 { 00054 public: 00055 00057 00058 00075 GlobalMPISession( int* argc, char*** argv, std::ostream *out = &std::cout ); 00076 00079 ~GlobalMPISession(); 00080 00082 00084 00085 00087 static bool mpiIsInitialized(); 00088 00090 static bool mpiIsFinalized(); 00091 00100 static int getRank(); 00101 00111 static int getNProc(); 00112 00114 00115 private: 00116 00117 static bool haveMPIState_; 00118 static bool mpiIsFinalized_; 00119 static int rank_; 00120 static int nProc_; 00121 00122 static void initialize( std::ostream *out ); 00123 00124 }; 00125 00126 } // namespace Teuchos 00127 00128 #endif // TEUCHOS_GLOBAL_MPI_SESSION_HPP