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: