Actual source code: ex39.c
1: static char help[] = "Tests mirror boundary conditions in 1-d.\n\n";
3: #include <petscdm.h>
4: #include <petscdmda.h>
6: int main(int argc, char **argv)
7: {
8: PetscInt M = 6, stencil_width = 1, dof = 1, m, xstart, i, j;
9: DM da;
10: Vec global, local;
11: PetscScalar **vglobal;
12: PetscViewer sviewer;
14: PetscFunctionBeginUser;
15: PetscCall(PetscInitialize(&argc, &argv, NULL, help));
16: PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0));
17: PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0));
19: PetscCall(DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_MIRROR, M, dof, stencil_width, NULL, &da));
20: PetscCall(DMSetFromOptions(da));
21: PetscCall(DMSetUp(da));
22: PetscCall(DMDAGetCorners(da, &xstart, 0, 0, &m, 0, 0));
24: PetscCall(DMCreateGlobalVector(da, &global));
25: PetscCall(DMDAVecGetArrayDOF(da, global, &vglobal));
26: for (i = xstart; i < xstart + m; i++) {
27: for (j = 0; j < dof; j++) vglobal[i][j] = 100 * (i + 1) + j;
28: }
29: PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal));
31: PetscCall(DMCreateLocalVector(da, &local));
32: PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local));
33: PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local));
35: PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer));
36: PetscCall(VecView(local, sviewer));
37: PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer));
38: PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD));
40: PetscCall(DMDestroy(&da));
41: PetscCall(VecDestroy(&local));
42: PetscCall(VecDestroy(&global));
44: PetscCall(PetscFinalize());
45: return 0;
46: }
48: /*TEST
50: test:
52: test:
53: suffix: 2
54: nsize: 2
55: filter: grep -v "Vec Object"
57: TEST*/