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.\n\n";

 5:  #include petscao.h

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

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

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

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


 28:   AOView(ao,PETSC_VIEWER_STDOUT_WORLD);

 30:   ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);
 31:   ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
 32:   AOPetscToApplicationIS(ao,ispetsc);
 33:   ISView(isapp,PETSC_VIEWER_STDOUT_WORLD);
 34:   ISView(ispetsc,PETSC_VIEWER_STDOUT_WORLD);


 37:   ISDestroy(ispetsc);
 38:   ISDestroy(isapp);

 40:   AODestroy(ao);
 41:   PetscFinalize();
 42:   return 0;
 43: }
 44: