1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests DMDA with variable multiple degrees of freedom per node.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown /* 5c4762a1bSJed Brown This code only compiles with gcc, since it is not ANSI C 6c4762a1bSJed Brown */ 7c4762a1bSJed Brown 8c4762a1bSJed Brown #include <petscdm.h> 9c4762a1bSJed Brown #include <petscdmda.h> 10c4762a1bSJed Brown 11*9371c9d4SSatish Balay PetscErrorCode doit(DM da, Vec global) { 12c4762a1bSJed Brown PetscInt i, j, k, M, N, dof; 13c4762a1bSJed Brown 149566063dSJacob Faibussowitsch PetscCall(DMDAGetInfo(da, 0, &M, &N, 0, 0, 0, 0, &dof, 0, 0, 0, 0, 0)); 15c4762a1bSJed Brown { 16*9371c9d4SSatish Balay struct { 17*9371c9d4SSatish Balay PetscScalar inside[dof]; 18*9371c9d4SSatish Balay } * *mystruct; 199566063dSJacob Faibussowitsch PetscCall(DMDAVecGetArrayRead(da, global, (void *)&mystruct)); 20c4762a1bSJed Brown for (i = 0; i < N; i++) { 21c4762a1bSJed Brown for (j = 0; j < M; j++) { 22c4762a1bSJed Brown for (k = 0; k < dof; k++) { 2363a3b9bcSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_WORLD, "%" PetscInt_FMT " %" PetscInt_FMT " %g\n", i, j, (double)mystruct[i][j].inside[0])); 24c4762a1bSJed Brown 25c4762a1bSJed Brown mystruct[i][j].inside[1] = 2.1; 26c4762a1bSJed Brown } 27c4762a1bSJed Brown } 28c4762a1bSJed Brown } 299566063dSJacob Faibussowitsch PetscCall(DMDAVecRestoreArrayRead(da, global, (void *)&mystruct)); 30c4762a1bSJed Brown } 31c4762a1bSJed Brown PetscFunctionReturn(0); 32c4762a1bSJed Brown } 33c4762a1bSJed Brown 34*9371c9d4SSatish Balay int main(int argc, char **argv) { 35c4762a1bSJed Brown PetscInt dof = 2, M = 3, N = 3, m = PETSC_DECIDE, n = PETSC_DECIDE; 36c4762a1bSJed Brown DM da; 37c4762a1bSJed Brown Vec global, local; 38c4762a1bSJed Brown 39327415f7SBarry Smith PetscFunctionBeginUser; 409566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 419566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0)); 42c4762a1bSJed Brown /* Create distributed array and get vectors */ 439566063dSJacob Faibussowitsch PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DMDA_STENCIL_BOX, M, N, m, n, dof, 1, NULL, NULL, &da)); 449566063dSJacob Faibussowitsch PetscCall(DMSetFromOptions(da)); 459566063dSJacob Faibussowitsch PetscCall(DMSetUp(da)); 469566063dSJacob Faibussowitsch PetscCall(DMCreateGlobalVector(da, &global)); 479566063dSJacob Faibussowitsch PetscCall(DMCreateLocalVector(da, &local)); 48c4762a1bSJed Brown 499566063dSJacob Faibussowitsch PetscCall(doit(da, global)); 50c4762a1bSJed Brown 519566063dSJacob Faibussowitsch PetscCall(VecView(global, 0)); 52c4762a1bSJed Brown 53c4762a1bSJed Brown /* Free memory */ 549566063dSJacob Faibussowitsch PetscCall(VecDestroy(&local)); 559566063dSJacob Faibussowitsch PetscCall(VecDestroy(&global)); 569566063dSJacob Faibussowitsch PetscCall(DMDestroy(&da)); 579566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 58b122ec5aSJacob Faibussowitsch return 0; 59c4762a1bSJed Brown } 60