1 2 static char help[] = "Tests mirror boundary conditions in 1-d.\n\n"; 3 4 #include <petscdm.h> 5 #include <petscdmda.h> 6 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; 14 15 PetscFunctionBeginUser; 16 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 17 PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0)); 18 PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0)); 19 20 PetscCall(DMDACreate1d(PETSC_COMM_WORLD, DM_BOUNDARY_MIRROR, M, dof, stencil_width, NULL, &da)); 21 PetscCall(DMSetFromOptions(da)); 22 PetscCall(DMSetUp(da)); 23 PetscCall(DMDAGetCorners(da, &xstart, 0, 0, &m, 0, 0)); 24 25 PetscCall(DMCreateGlobalVector(da, &global)); 26 PetscCall(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 PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal)); 31 32 PetscCall(DMCreateLocalVector(da, &local)); 33 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 34 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 35 36 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); 37 PetscCall(VecView(local, sviewer)); 38 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sviewer)); 39 PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD)); 40 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 41 42 PetscCall(DMDestroy(&da)); 43 PetscCall(VecDestroy(&local)); 44 PetscCall(VecDestroy(&global)); 45 46 PetscCall(PetscFinalize()); 47 return 0; 48 } 49 50 /*TEST 51 52 test: 53 54 test: 55 suffix: 2 56 nsize: 2 57 filter: grep -v "Vec Object" 58 59 TEST*/ 60