1:  #include <petsc/private/dmpatchimpl.h>
  2:  #include <petscdmda.h>

  4: PetscErrorCode DMSetFromOptions_Patch(PetscOptionItems *PetscOptionsObject,DM dm)
  5: {
  6:   /* DM_Patch      *mesh = (DM_Patch*) dm->data; */

 11:   PetscOptionsHead(PetscOptionsObject,"DMPatch Options");
 12:   /* Handle associated vectors */
 13:   /* Handle viewing */
 14:   PetscOptionsTail();
 15:   return(0);
 16: }

 18: /* External function declarations here */
 19: extern PetscErrorCode DMSetUp_Patch(DM dm);
 20: extern PetscErrorCode DMView_Patch(DM dm, PetscViewer viewer);
 21: extern PetscErrorCode DMCreateGlobalVector_Patch(DM dm, Vec *g);
 22: extern PetscErrorCode DMCreateLocalVector_Patch(DM dm, Vec *l);
 23: extern PetscErrorCode DMDestroy_Patch(DM dm);
 24: extern PetscErrorCode DMCreateSubDM_Patch(DM dm, PetscInt numFields, const PetscInt fields[], IS *is, DM *subdm);

 26: PetscErrorCode DMInitialize_Patch(DM dm)
 27: {
 29:   dm->ops->view                            = DMView_Patch;
 30:   dm->ops->setfromoptions                  = DMSetFromOptions_Patch;
 31:   dm->ops->setup                           = DMSetUp_Patch;
 32:   dm->ops->createglobalvector              = DMCreateGlobalVector_Patch;
 33:   dm->ops->createlocalvector               = DMCreateLocalVector_Patch;
 34:   dm->ops->getlocaltoglobalmapping         = NULL;
 35:   dm->ops->createfieldis                   = NULL;
 36:   dm->ops->getcoloring                     = 0;
 37:   dm->ops->creatematrix                    = 0;
 38:   dm->ops->createinterpolation             = 0;
 39:   dm->ops->createinjection                 = 0;
 40:   dm->ops->refine                          = 0;
 41:   dm->ops->coarsen                         = 0;
 42:   dm->ops->refinehierarchy                 = 0;
 43:   dm->ops->coarsenhierarchy                = 0;
 44:   dm->ops->globaltolocalbegin              = NULL;
 45:   dm->ops->globaltolocalend                = NULL;
 46:   dm->ops->localtoglobalbegin              = NULL;
 47:   dm->ops->localtoglobalend                = NULL;
 48:   dm->ops->destroy                         = DMDestroy_Patch;
 49:   dm->ops->createsubdm                     = DMCreateSubDM_Patch;
 50:   return(0);
 51: }

 53: PETSC_EXTERN PetscErrorCode DMCreate_Patch(DM dm)
 54: {
 55:   DM_Patch       *mesh;

 60:   PetscNewLog(dm,&mesh);
 61:   dm->data = mesh;

 63:   mesh->refct       = 1;
 64:   mesh->dmCoarse    = NULL;
 65:   mesh->patchSize.i = 0;
 66:   mesh->patchSize.j = 0;
 67:   mesh->patchSize.k = 0;
 68:   mesh->patchSize.c = 0;

 70:   DMInitialize_Patch(dm);
 71:   return(0);
 72: }

 74: /*@
 75:   DMPatchCreate - Creates a DMPatch object, which is a collections of DMs called patches.

 77:   Collective

 79:   Input Parameter:
 80: . comm - The communicator for the DMPatch object

 82:   Output Parameter:
 83: . mesh  - The DMPatch object

 85:   Level: beginner

 87: @*/
 88: PetscErrorCode DMPatchCreate(MPI_Comm comm, DM *mesh)
 89: {

 94:   DMCreate(comm, mesh);
 95:   DMSetType(*mesh, DMPATCH);
 96:   return(0);
 97: }

 99: PetscErrorCode DMPatchCreateGrid(MPI_Comm comm, PetscInt dim, MatStencil patchSize, MatStencil commSize, MatStencil gridSize, DM *dm)
100: {
101:   DM_Patch       *mesh;
102:   DM             da;
103:   PetscInt       dof = 1, width = 1;

107:   DMPatchCreate(comm, dm);
108:   mesh = (DM_Patch*) (*dm)->data;
109:   if (dim < 2) {
110:     gridSize.j  = 1;
111:     patchSize.j = 1;
112:   }
113:   if (dim < 3) {
114:     gridSize.k  = 1;
115:     patchSize.k = 1;
116:   }
117:   DMCreate(comm, &da);
118:   DMSetType(da, DMDA);
119:   DMSetDimension(da, dim);
120:   DMDASetSizes(da, gridSize.i, gridSize.j, gridSize.k);
121:   DMDASetBoundaryType(da, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE);
122:   DMDASetDof(da, dof);
123:   DMDASetStencilType(da, DMDA_STENCIL_BOX);
124:   DMDASetStencilWidth(da, width);

126:   mesh->dmCoarse = da;

128:   DMPatchSetPatchSize(*dm, patchSize);
129:   DMPatchSetCommSize(*dm, commSize);
130:   return(0);
131: }