MPI_Graph_get function - Message Passing Interface (original) (raw)

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