petsc-3.14.6 2021-03-30
VecCreateGhostWithArray
Creates a parallel vector with ghost padding on each processor; the caller allocates the array space.
Synopsis
#include "petscvec.h"
PetscErrorCode VecCreateGhostWithArray(MPI_Comm comm,PetscInt n,PetscInt N,PetscInt nghost,const PetscInt ghosts[],const PetscScalar array[],Vec *vv)
Collective
Input Parameters
| comm | - the MPI communicator to use
|
| n | - local vector length
|
| N | - global vector length (or PETSC_DECIDE to have calculated if n is given)
|
| nghost | - number of local ghost points
|
| ghosts | - global indices of ghost points (or NULL if not needed), these do not need to be in increasing order (sorted)
|
| array | - the space to store the vector values (as long as n + nghost)
|
Output Parameter
| vv | - the global vector representation (without ghost points as part of vector)
|
Notes
Use VecGhostGetLocalForm() to access the local, ghosted representation
of the vector.
This also automatically sets the ISLocalToGlobalMapping() for this vector.
See Also
VecCreate(), VecGhostGetLocalForm(), VecGhostRestoreLocalForm(),
VecCreateGhost(), VecCreateSeqWithArray(), VecCreateMPIWithArray(),
VecCreateGhostBlock(), VecCreateGhostBlockWithArray(), VecMPISetGhost()
Level
advanced
Location
src/vec/vec/impls/mpi/pbvec.c
Examples
src/vec/vec/tutorials/ex9.c.html
src/vec/vec/tutorials/ex9f.F90.html
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages