Teuchos_GlobalMPISession.hpp

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

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