Actual source code: ex7.c
2: static char help[] = "Demonstrates constructing an application ordering.\n\n";
4: #include petscao.h
8: int main(int argc,char **argv)
9: {
10: int n = 5,ierr,rank,size;
11: IS ispetsc,isapp;
12: AO ao;
14: PetscInitialize(&argc,&argv,(char*)0,help);
15: PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
16: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
17: MPI_Comm_size(PETSC_COMM_WORLD,&size);
19: /* create the index sets */
20: ISCreateStride(PETSC_COMM_WORLD,n,rank,size,&ispetsc);
21: ISCreateStride(PETSC_COMM_WORLD,n,n*rank,1,&isapp);
23: /* create the application ordering */
24: AOCreateBasicIS(isapp,ispetsc,&ao);
27: AOView(ao,PETSC_VIEWER_STDOUT_WORLD);
29: ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);
30: ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
31: AOPetscToApplicationIS(ao,ispetsc);
32: ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
33: ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);
36: ISDestroy(ispetsc);
37: ISDestroy(isapp);
39: AODestroy(ao);
40: PetscFinalize();
41: return 0;
42: }
43: