Actual source code: ex44.c


  2: static char help[] = "Tests various DMComposite routines.\n\n";

  4: #include <petscdm.h>
  5: #include <petscdmda.h>
  6: #include <petscdmcomposite.h>

  8: int main(int argc, char **argv)
  9: {
 10:   PetscMPIInt rank;
 11:   DM          da1, da2, packer;
 12:   Vec         local, global, globals[2], buffer;
 13:   PetscScalar value;
 14:   PetscViewer viewer;

 17:   PetscInitialize(&argc, &argv, (char *)0, help);

 19:   DMCompositeCreate(PETSC_COMM_WORLD, &packer);
 20:   DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 8, 1, 1, NULL, &da1);
 21:   DMSetFromOptions(da1);
 22:   DMSetUp(da1);
 23:   DMCompositeAddDM(packer, da1);
 24:   DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, 6, 1, 1, NULL, &da2);
 25:   DMSetFromOptions(da2);
 26:   DMSetUp(da2);
 27:   DMCompositeAddDM(packer, da2);

 29:   DMCreateGlobalVector(packer, &global);
 30:   DMCreateLocalVector(packer, &local);
 31:   DMCreateLocalVector(packer, &buffer);

 33:   DMCompositeGetAccessArray(packer, global, 2, NULL, globals);
 34:   value = 1;
 35:   VecSet(globals[0], value);
 36:   value = -1;
 37:   VecSet(globals[1], value);
 38:   MPI_Comm_rank(PETSC_COMM_WORLD, &rank);
 39:   value = rank + 1;
 40:   VecScale(globals[0], value);
 41:   VecScale(globals[1], value);
 42:   DMCompositeRestoreAccessArray(packer, global, 2, NULL, globals);

 44:   /* Test GlobalToLocal in insert mode */
 45:   DMGlobalToLocalBegin(packer, global, INSERT_VALUES, local);
 46:   DMGlobalToLocalEnd(packer, global, INSERT_VALUES, local);

 48:   PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD);
 49:   PetscViewerASCIISynchronizedPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nLocal Vector: processor %d\n", rank);
 50:   PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer);
 51:   VecView(local, viewer);
 52:   PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer);
 53:   PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);
 54:   PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD);

 56:   /* Test LocalToGlobal in insert mode */
 57:   DMLocalToGlobalBegin(packer, local, INSERT_VALUES, global);
 58:   DMLocalToGlobalEnd(packer, local, INSERT_VALUES, global);

 60:   VecView(global, PETSC_VIEWER_STDOUT_WORLD);

 62:   /* Test LocalToLocal in insert mode */
 63:   DMLocalToLocalBegin(packer, local, INSERT_VALUES, buffer);
 64:   DMLocalToLocalEnd(packer, local, INSERT_VALUES, buffer);

 66:   PetscViewerASCIIPushSynchronized(PETSC_VIEWER_STDOUT_WORLD);
 67:   PetscViewerASCIISynchronizedPrintf(PETSC_VIEWER_STDOUT_WORLD, "\nLocal Vector: processor %d\n", rank);
 68:   PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer);
 69:   VecView(buffer, viewer);
 70:   PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &viewer);
 71:   PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);
 72:   PetscViewerASCIIPopSynchronized(PETSC_VIEWER_STDOUT_WORLD);

 74:   VecDestroy(&buffer);
 75:   VecDestroy(&local);
 76:   VecDestroy(&global);
 77:   DMDestroy(&packer);
 78:   DMDestroy(&da2);
 79:   DMDestroy(&da1);

 81:   PetscFinalize();
 82:   return 0;
 83: }

 85: /*TEST

 87:    test:
 88:       nsize: 3

 90: TEST*/