MPI_Graph_get function

Retrieves graph topology information associated with a communicator.

Syntax

int MPIAPI MPI_Graph_get(
   MPI_Comm                comm,
   int                     maxindex,
   int                     maxedges,
   _Out_cap_(maxindex) int *index,
   _Out_cap_(maxindex) int *edges
);

Parameters

• comm
  Communicator with graph structure.

• maxindex
  Length of the index vector in the calling program.

• maxedges
  Length of the edges vector in the calling program.

• index
  Array of integers containing the graph structure.

• edges
  Array of integers containing the graph structure.

Return value

Returns MPI_SUCCESS on success. Otherwise, the return value is an error code.

In Fortran, the return value is stored in the IERROR parameter.

Fortran

    MPI_GRAPH_GET(COMM, MAXINDEX, MAXEDGES, INDEX, EDGES, IERROR)
        INTEGER COMM, MAXINDEX, MAXEDGES, INDEX(*), EDGES(*), IERROR

Requirements

See also

MPI Process Topology Functions