C Bindings for Process Topologies

int MPI_Cart_create(MPI_Comm comm_old, int ndims, int *dims, int *periods, int reorder, MPI_Comm *comm_cart)
int MPI_Dims_create(int nnodes, int ndims, int *dims)
int MPI_Graph_create(MPI_Comm comm_old, int nnodes, int *index, int *edges, int reorder, MPI_Comm *comm_graph)
int MPI_Topo_test(MPI_Comm comm, int *status)
int MPI_Graphdims_get(MPI_Comm comm, int *nnodes, int *nedges)
int MPI_Graph_get(MPI_Comm comm, int maxindex, int maxedges, int *index, int *edges)
int MPI_Cartdim_get(MPI_Comm comm, int *ndims)
int MPI_Cart_get(MPI_Comm comm, int maxdims, int *dims, int *periods, int *coords)
int MPI_Cart_rank(MPI_Comm comm, int *coords, int *rank)
int MPI_Cart_coords(MPI_Comm comm, int rank, int maxdims, int *coords)
int MPI_Graph_neighbors_count(MPI_Comm comm, int rank, int *nneighbors)
int MPI_Graph_neighbors(MPI_Comm comm, int rank, int maxneighbors, int *neighbors)
int MPI_Cart_shift(MPI_Comm comm, int direction, int disp, int *rank_source, int *rank_dest)
int MPI_Cart_sub(MPI_Comm comm, int *remain_dims, MPI_Comm *newcomm)
int MPI_Cart_map(MPI_Comm comm, int ndims, int *dims, int *periods, int *newrank)
int MPI_Graph_map(MPI_Comm comm, int nnodes, int *index, int *edges, int *newrank)