mpi_graph_neighbors_count(3openmpi) [osx man page]
MPI_Graph_neighbors_count(3OpenMPI) MPI_Graph_neighbors_count(3OpenMPI) NAME
MPI_Graph_neighbors_count - Returns the number of neighbors of a node associated with a graph topology. SYNTAX
C Syntax #include <mpi.h> int MPI_Graph_neighbors_count(MPI_Comm comm, int rank, int *nneighbors) Fortran Syntax INCLUDE 'mpif.h' MPI_GRAPH_NEIGHBORS_COUNT(COMM, RANK, NNEIGHBORS, IERROR) INTEGER COMM, RANK, NNEIGHBORS, IERROR C++ Syntax #include <mpi.h> int Graphcomm::Get_neighbors_count(int rank) const INPUT PARAMETERS
comm Communicator with graph topology (handle). rank Rank of process in group of comm (integer). OUTPUT PARAMETERS
nneighbors Number of neighbors of specified process (integer). IERROR Fortran only: Error status (integer). DESCRIPTION
MPI_Graph_neighbors_count and MPI_Graph_neighbors provide adjacency information for a general, graph topology. MPI_Graph_neighbors_count returns the number of neighbors for the process signified by rank. ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func- tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object. Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error. SEE ALSO
MPI_Graph_neighbors Open MPI 1.2 September 2006 MPI_Graph_neighbors_count(3OpenMPI)
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MPI_Comm_set_errhandler(3OpenMPI) MPI_Comm_set_errhandler(3OpenMPI) NAME
MPI_Comm_set_errhandler - Attaches a new error handler to a communicator. SYNTAX
C Syntax #include <mpi.h> int MPI_Comm_set_errhandler(MPI_Comm comm, MPI_Errhandler errhandler) Fortran Syntax INCLUDE 'mpif.h' MPI_COMM_SET_ERRHANDLER(COMM, ERRHANDLER, IERROR) INTEGER COMM, ERRHANDLER, IERROR C++ Syntax #include <mpi.h> void MPI::Comm::Set_errhandler(const MPI::Errhandler& errhandler) INPUT
/OUTPUT PARAMETER comm Communicator (handle). OUTPUT PARAMETERS
errhandler New error handler for communicator (handle). IERROR Fortran only: Error status (integer). DESCRIPTION
MPI_Comm_set_errhandler attaches a new error handler to a communicator. The error handler must be either a predefined error handler or an error handler created by a call to MPI_Comm_create_errhandler. This call is identical to MPI_Errhandler_set, the use of which is depre- cated. ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func- tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object. Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error. Open MPI 1.2 September 2006 MPI_Comm_set_errhandler(3OpenMPI)