Actual source code: ex7.c

  1: /*$Id: ex7.c,v 1.17 2001/04/10 19:37:18 bsmith Exp $*/

  3: static char help[] = "Demonstrates constructing an application ordering.nn";

 5:  #include petscao.h

  7: int main(int argc,char **argv)
  8: {
  9:   int      n = 5,ierr,rank,size;
 10:   IS       ispetsc,isapp;
 11:   AO       ao;

 13:   PetscInitialize(&argc,&argv,(char*)0,help);
 14:   PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
 15:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 16:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 18:   /* create the index sets */
 19:   ISCreateStride(PETSC_COMM_WORLD,n,rank,size,&ispetsc);
 20:   ISCreateStride(PETSC_COMM_WORLD,n,n*rank,1,&isapp);

 22:   /* create the application ordering */
 23:   AOCreateBasicIS(isapp,ispetsc,&ao);


 26:   AOView(ao,PETSC_VIEWER_STDOUT_WORLD);

 28:   ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);
 29:   ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
 30:   AOPetscToApplicationIS(ao,ispetsc);
 31:   ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
 32:   ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);


 35:   ISDestroy(ispetsc);
 36:   ISDestroy(isapp);

 38:   AODestroy(ao);
 39:   PetscFinalize();
 40:   return 0;
 41: }
 42: