SYNOPSIS

int MPI_Dist_graph_neighbors(MPI_Comm comm,
int maxindegree, int sources[], int sourceweights[],
int maxoutdegree, int destinations[], int destweights[])

INPUT PARAMETERS

comm

- communicator with distributed graph topology (handle)

maxindegree

- size of sources and sourceweights arrays (non-negative integer)

maxoutdegree

- size of destinations and destweights arrays (non-negative integer)

OUTPUT PARAMETERS

sources

- processes for which the calling process is a destination (array of non-negative integers)

sourceweights

- weights of the edges into the calling process (array of non-negative integers)

destinations

- processes for which the calling process is a source (array of non-negative integers)

destweights

- weights of the edges out of the calling process (array of non-negative integers)

THREAD AND INTERRUPT SAFETY

This routine is thread-safe. This means that this routine may be safely used by multiple threads without the need for any user-provided thread locks. However, the routine is not interrupt safe. Typically, this is due to the use of memory allocation routines such as malloc or other non-MPICH runtime routines that are themselves not interrupt-safe.

NOTES FOR FORTRAN

All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list. ierr is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the call statement.

All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.