1 static char help[] = "Tests mirror boundary conditions in 1-d.\n\n";
2
3 #include <petscdm.h>
4 #include <petscdmda.h>
5
main(int argc,char ** argv)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;
13
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));
18
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));
23
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));
30
31 PetscCall(DMCreateLocalVector(da, &local));
32 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local));
33 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local));
34
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));
39
40 PetscCall(DMDestroy(&da));
41 PetscCall(VecDestroy(&local));
42 PetscCall(VecDestroy(&global));
43
44 PetscCall(PetscFinalize());
45 return 0;
46 }
47
48 /*TEST
49
50 test:
51
52 test:
53 suffix: 2
54 nsize: 2
55 filter: grep -v "Vec Object"
56
57 TEST*/
58