Date: 2021-03-03T22:28:04+00:00

Actual source code: slda.c
petsc-3.14.5 2021-03-03
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      1: #include <../src/ts/characteristic/impls/da/slda.h>
      2: #include <petscdmda.h>
      3: #include <petscviewer.h>

      5: PetscErrorCode CharacteristicView_DA(Characteristic c, PetscViewer viewer)
      6: {
      7:   Characteristic_DA *da = (Characteristic_DA*) c->data;
      8:   PetscBool         iascii, isstring;
      9:   PetscErrorCode    ierr;

     12:   /* Pull out field names from DM */
     13:   PetscObjectTypeCompare((PetscObject) viewer, PETSCVIEWERASCII, &iascii);
     14:   PetscObjectTypeCompare((PetscObject) viewer, PETSCVIEWERSTRING, &isstring);
     15:   if (iascii) {
     16:     PetscViewerASCIIPrintf(viewer,"  DMDA: dummy=%D\n", da->dummy);
     17:   } else if (isstring) {
     18:     PetscViewerStringSPrintf(viewer,"dummy %D", da->dummy);
     19:   }
     20:   return(0);
     21: }

     23: PetscErrorCode CharacteristicDestroy_DA(Characteristic c)
     24: {
     25:   Characteristic_DA *da = (Characteristic_DA*) c->data;
     26:   PetscErrorCode    ierr;

     29:   PetscFree(da);
     30:   return(0);
     31: }

     33: PetscErrorCode CharacteristicSetUp_DA(Characteristic c)
     34: {
     35:   PetscMPIInt    blockLen[2];
     36:   MPI_Aint       indices[2];
     37:   MPI_Datatype   oldtypes[2];
     38:   PetscInt       dim, numValues;

     41:   DMDAGetInfo(c->velocityDA, &dim, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
     42:   if (c->structured) c->numIds = dim;
     43:   else c->numIds = 3;
     44:   if (c->numFieldComp > MAX_COMPONENTS) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE, "The maximum number of fields allowed is %d, you have %d. You can recompile after increasing MAX_COMPONENTS.", MAX_COMPONENTS, c->numFieldComp);
     45:   numValues = 4 + MAX_COMPONENTS;

     47:   /* Create new MPI datatype for communication of characteristic point structs */
     48:   blockLen[0] = 1+c->numIds; indices[0] = 0;                              oldtypes[0] = MPIU_INT;
     49:   blockLen[1] = numValues;   indices[1] = (1+c->numIds)*sizeof(PetscInt); oldtypes[1] = MPIU_SCALAR;
     50:   MPI_Type_create_struct(2, blockLen, indices, oldtypes, &c->itemType);
     51:   MPI_Type_commit(&c->itemType);

     53:   /* Initialize the local queue for char foot values */
     54:   VecGetLocalSize(c->velocity, &c->queueMax);
     55:   PetscMalloc1(c->queueMax, &c->queue);
     56:   c->queueSize = 0;

     58:   /* Allocate communication structures */
     59:   if (c->numNeighbors <= 0) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE, "Invalid number of neighbors %d. Call CharactersiticSetNeighbors() before setup.", c->numNeighbors);
     60:   PetscMalloc1(c->numNeighbors, &c->needCount);
     61:   PetscMalloc1(c->numNeighbors, &c->localOffsets);
     62:   PetscMalloc1(c->numNeighbors, &c->fillCount);
     63:   PetscMalloc1(c->numNeighbors, &c->remoteOffsets);
     64:   PetscMalloc1(c->numNeighbors-1, &c->request);
     65:   PetscMalloc1(c->numNeighbors-1,  &c->status);
     66:   return(0);
     67: }

     69: PETSC_EXTERN PetscErrorCode CharacteristicCreate_DA(Characteristic c)
     70: {
     71:   Characteristic_DA *da;
     72:   PetscErrorCode    ierr;

     75:   PetscNew(&da);
     76:   PetscMemzero(da, sizeof(Characteristic_DA));
     77:   PetscLogObjectMemory((PetscObject)c, sizeof(Characteristic_DA));
     78:   c->data = (void*) da;

     80:   c->ops->setup   = CharacteristicSetUp_DA;
     81:   c->ops->destroy = CharacteristicDestroy_DA;
     82:   c->ops->view    = CharacteristicView_DA;

     84:   da->dummy = 0;
     85:   return(0);
     86: }

     88: /* -----------------------------------------------------------------------------
     89:    Checks for periodicity of a DM and Maps points outside of a domain back onto the domain
     90:    using appropriate periodicity. At the moment assumes only a 2-D DMDA.
     91:    ----------------------------------------------------------------------------------------*/
     92: PetscErrorCode DMDAMapCoordsToPeriodicDomain(DM da, PetscScalar *x, PetscScalar *y)
     93: {
     94:   DMBoundaryType bx, by;
     95:   PetscInt       dim, gx, gy;

     99:   DMDAGetInfo(da, &dim, &gx, &gy, NULL, NULL, NULL, NULL, NULL, NULL, &bx, &by, NULL, NULL);

    101:   if (bx == DM_BOUNDARY_PERIODIC) {
    102:       while (*x >= (PetscScalar)gx) *x -= (PetscScalar)gx;
    103:       while (*x < 0.0)              *x += (PetscScalar)gx;
    104:     }
    105:     if (by == DM_BOUNDARY_PERIODIC) {
    106:       while (*y >= (PetscScalar)gy) *y -= (PetscScalar)gy;
    107:       while (*y < 0.0)              *y += (PetscScalar)gy;
    108:     }
    109:   return(0);
    110: }