Actual source code: patchcreate.c
petsc-3.13.6 2020-09-29
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      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: }