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