Teuchos_GlobalMPISession.hpp

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#ifndef TEUCHOS_GLOBAL_MPI_SESSION_HPP
#define TEUCHOS_GLOBAL_MPI_SESSION_HPP

#include "Teuchos_ArrayView.hpp"


namespace Teuchos {

//
class TEUCHOSCORE_LIB_DLL_EXPORT GlobalMPISession
{
public:



  GlobalMPISession( int* argc, char*** argv, std::ostream *out = &std::cout );

  ~GlobalMPISession();




  static bool mpiIsInitialized();

  static bool mpiIsFinalized();

  static int getRank();

  static int getNProc();

  static void barrier();

  static int sum(int localVal);

  static void allGather(int localVal, const ArrayView<int> &allVals);


private:

  static bool haveMPIState_;
  static bool mpiIsFinalized_;
  static int rank_;
  static int nProc_;

  static void initialize( std::ostream *out );

  static void justInTimeInitialize();

};

} // namespace Teuchos

#endif // TEUCHOS_GLOBAL_MPI_SESSION_HPP