Actual source code: dapreallocate.c

      1: #include <petsc/private/dmdaimpl.h>
      2: #include <petsc/private/isimpl.h>
      3: #include <petscsf.h>

      5: /*@
      6:   DMDASetPreallocationCenterDimension - Determine the topology used to determine adjacency

      8:   Input Parameters:
      9: + dm - The DM object
     10: - preallocCenterDim - The dimension of points which connect adjacent entries

     12:   Level: developer

     14:   Notes:
     15: $     FEM:   Two points p and q are adjacent if q \in closure(star(p)), preallocCenterDim = dim
     16: $     FVM:   Two points p and q are adjacent if q \in star(cone(p)),    preallocCenterDim = dim-1
     17: $     FVM++: Two points p and q are adjacent if q \in star(closure(p)), preallocCenterDim = 0

     19: .seealso: DMCreateMatrix(), DMDAPreallocateOperator()
     20: @*/
     21: PetscErrorCode DMDASetPreallocationCenterDimension(DM dm, PetscInt preallocCenterDim)
     22: {
     23:   DM_DA *mesh = (DM_DA*) dm->data;

     26:   mesh->preallocCenterDim = preallocCenterDim;
     27:   return 0;
     28: }

     30: /*@
     31:   DMDAGetPreallocationCenterDimension - Return the topology used to determine adjacency

     33:   Input Parameter:
     34: . dm - The DM object

     36:   Output Parameter:
     37: . preallocCenterDim - The dimension of points which connect adjacent entries

     39:   Level: developer

     41:   Notes:
     42: $     FEM:   Two points p and q are adjacent if q \in closure(star(p)), preallocCenterDim = dim
     43: $     FVM:   Two points p and q are adjacent if q \in star(cone(p)),    preallocCenterDim = dim-1
     44: $     FVM++: Two points p and q are adjacent if q \in star(closure(p)), preallocCenterDim = 0

     46: .seealso: DMCreateMatrix(), DMDAPreallocateOperator(), DMDASetPreallocationCenterDimension()
     47: @*/
     48: PetscErrorCode DMDAGetPreallocationCenterDimension(DM dm, PetscInt *preallocCenterDim)
     49: {
     50:   DM_DA *mesh = (DM_DA*) dm->data;

     54:   *preallocCenterDim = mesh->preallocCenterDim;
     55:   return 0;
     56: }