DMDAGetNeighbors

Gets an array containing the MPI rank of all the current processes neighbors.

Synopsis

#include "petscdmda.h"   
PetscErrorCode DMDAGetNeighbors(DM da, const PetscMPIInt *ranks[])

Not Collective

Input Parameter

• da - the DMDA object

Output Parameter

• ranks - the neighbors ranks, stored with the x index increasing most rapidly. The process itself is in the list

Notes

In 2d the ranks is of length 9, in 3d of length 27

Not supported in 1d

Do not free the array, it is freed when the DMDA is destroyed.

Fortran Note

Pass in an array of the appropriate length to contain the values

See Also

DMDA - Creating vectors for structured grids, DMDA, DM

Level

intermediate

Location

src/dm/impls/da/da.c

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Index of all DMDA routines
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Index of all manual pages