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Teuchos_DefaultMpiComm.cpp
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00004 //                    Teuchos: Common Tools Package
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00041 
00042 #include <Teuchos_DefaultMpiComm.hpp>
00043 
00044 
00045 namespace Teuchos {
00046 
00047   std::string
00048   mpiErrorCodeToString (const int err) 
00049   {
00050     if (err == MPI_SUCCESS) {
00051       return "MPI_SUCCESS";
00052     }
00053     else {
00054       char rawErrString[MPI_MAX_ERROR_STRING];
00055       int len = 0;
00056       (void) MPI_Error_string (err, rawErrString, &len);
00057       return std::string (rawErrString);
00058     }
00059   }
00060 
00061   namespace details {
00062     void safeCommFree (MPI_Comm* comm) {
00063       int finalized = 0;
00064       const int err = MPI_Finalized (&finalized);
00065       // Just to be safe, don't do anything if calling MPI_Finalized
00066       // didn't succeed.  It's better to leak memory than to crash.
00067       if (err == MPI_SUCCESS && ! finalized) {
00068   // Don't throw an exception if MPI_Comm_free reports an error,
00069   // since we're likely to be in a destructor and destructors
00070   // shouldn't throw exceptions.
00071   (void) MPI_Comm_free (comm);
00072       }
00073     }
00074 
00075     int setCommErrhandler (MPI_Comm comm, MPI_Errhandler handler) {
00076 #if MPI_VERSION >= 2
00077       return MPI_Comm_set_errhandler (comm, handler);
00078 #else // MPI 1
00079       return MPI_Errhandler_set (comm, handler);
00080 #endif // MPI_VERSION >= 2
00081     }
00082   } // namespace details
00083 
00084 } // namespace Teuchos
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