Date: 2022-03-31T04:47:36+00:00

Actual source code: patchcreate.c

      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; */

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

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

     24: PetscErrorCode DMInitialize_Patch(DM dm)
     25: {
     26:   dm->ops->view                            = DMView_Patch;
     27:   dm->ops->setfromoptions                  = DMSetFromOptions_Patch;
     28:   dm->ops->setup                           = DMSetUp_Patch;
     29:   dm->ops->createglobalvector              = DMCreateGlobalVector_Patch;
     30:   dm->ops->createlocalvector               = DMCreateLocalVector_Patch;
     31:   dm->ops->getlocaltoglobalmapping         = NULL;
     32:   dm->ops->createfieldis                   = NULL;
     33:   dm->ops->getcoloring                     = NULL;
     34:   dm->ops->creatematrix                    = NULL;
     35:   dm->ops->createinterpolation             = NULL;
     36:   dm->ops->createinjection                 = NULL;
     37:   dm->ops->refine                          = NULL;
     38:   dm->ops->coarsen                         = NULL;
     39:   dm->ops->refinehierarchy                 = NULL;
     40:   dm->ops->coarsenhierarchy                = NULL;
     41:   dm->ops->globaltolocalbegin              = NULL;
     42:   dm->ops->globaltolocalend                = NULL;
     43:   dm->ops->localtoglobalbegin              = NULL;
     44:   dm->ops->localtoglobalend                = NULL;
     45:   dm->ops->destroy                         = DMDestroy_Patch;
     46:   dm->ops->createsubdm                     = DMCreateSubDM_Patch;
     47:   return 0;
     48: }

     50: PETSC_EXTERN PetscErrorCode DMCreate_Patch(DM dm)
     51: {
     52:   DM_Patch       *mesh;

     55:   PetscNewLog(dm,&mesh);
     56:   dm->data = mesh;

     58:   mesh->refct       = 1;
     59:   mesh->dmCoarse    = NULL;
     60:   mesh->patchSize.i = 0;
     61:   mesh->patchSize.j = 0;
     62:   mesh->patchSize.k = 0;
     63:   mesh->patchSize.c = 0;

     65:   DMInitialize_Patch(dm);
     66:   return 0;
     67: }

     69: /*@
     70:   DMPatchCreate - Creates a DMPatch object, which is a collections of DMs called patches.

     72:   Collective

     74:   Input Parameter:
     75: . comm - The communicator for the DMPatch object

     77:   Output Parameter:
     78: . mesh  - The DMPatch object

     80:   Notes:

     82:   This code is incomplete and not used by other parts of PETSc.

     84:   Level: beginner

     86: .seealso: DMPatchZoom()

     88: @*/
     89: PetscErrorCode DMPatchCreate(MPI_Comm comm, DM *mesh)
     90: {
     92:   DMCreate(comm, mesh);
     93:   DMSetType(*mesh, DMPATCH);
     94:   return 0;
     95: }

     97: PetscErrorCode DMPatchCreateGrid(MPI_Comm comm, PetscInt dim, MatStencil patchSize, MatStencil commSize, MatStencil gridSize, DM *dm)
     98: {
     99:   DM_Patch       *mesh;
    100:   DM             da;
    101:   PetscInt       dof = 1, width = 1;

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

    122:   mesh->dmCoarse = da;

    124:   DMPatchSetPatchSize(*dm, patchSize);
    125:   DMPatchSetCommSize(*dm, commSize);
    126:   return 0;
    127: }