MPIGraphdimsget(3OpenMPI) MPIGraphdimsget(3OpenMPI)

NAME
       MMPPIIGGrraapphhddiimmssggeett   -  Retrieves  graph topology information associated
       with a communicator.


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPIGraphdimsget(MPIComm comm, int *nnodes, int *nedges)


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPIGRAPHDIMSGET(COMM, NNODES, NEDGES, IERROR)
            INTEGER   COMM, NNODES, NEDGES, IERROR


CC++++ SSyynnttaaxx
       #include 
       void Graphcomm::Get dims(int nnodes[], int nedges[]) const


IINNPPUUTT PPAARRAAMMEETTEERR
       comm      Communicator for group with graph structure (handle).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       nnodes    Number of nodes in graph (integer).

       nedges    Number of edges in graph (integer).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       Functions MPIGraphdimsget and MPIGraphget retrieve the graph-topol-
       ogy   information   that   was   associated   with  a  communicator  by
       MPIGraphcreate.

       The information provided by MPIGraphdimsget can be used to  dimension
       the vectors index and edges correctly for a call to MPIGraphget.


EERRRROORRSS
       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::ERRORSTHROWEXCEPTIONS, 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
       MPICommseterrhandler; the predefined error handler MPIERRORSRETURN
       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
       MPIGraphcreate
       MPIGraphget




Open MPI 1.2                    September 2006     MPIGraphdimsget(3OpenMPI)