layout.h

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#ifndef LAYOUT_INCLUDED
#define LAYOUT_INCLUDED

#include "communicator_mpi.h"
#include "commonParameters.h"


class Communicator_impl::Layout {
 public:

  static int grid_rank(int *rank, const int *gcoord); 
  static int grid_coord(int *gcoord, const int rank); 
  static int grid_dims(int *gdims);                   

  static int ipe(const int idir);                     
  static int npe(const int idir);                     

  static int tag(int rank, int idir, int ipm);        

  static int layout_setup();                          
  static int layout_delete();                         

  static int m_ndim;                                  
  static int *m_dims;                                 

  // logical layout
  static int *m_grid_dims;  
  static int *m_grid_coord; 

  static int *m_ipe_up;     
  static int *m_ipe_dn;     

  // physical mapping
  static char m_map_grid[16];
  static int  *m_physical_to_logical; 

  static int physical_map_setup();
  static int physical_map_delete();

  // subdimensional-slices
  static MPI_Comm *m_sub_comm;  

  static int subgrid_setup();
  static int subgrid_delete();

 private:
  Layout() {}                       
  Layout(const Layout&) {} 
  Layout& operator=(const Layout&); 
};

/*
  struct LogicalLayout {
    int ndim;
    int *dims; // global lattice size

    int *grid_dims;  // number of division along axis
    int *grid_coord;  // logical grid coord

    int *ipe_up;  // rank of upward neighbour along ith axis
    int *ipe_dn;  // rank of downward neighbour along ith axis

    MPI_Comm *sub_comm;  // communicator of reduced dimensions
  };

  static LogicalLayout m_layout;

  static int layout_setup ();
  static int layout_delete ();

  static int subgrid_setup ();
  static int subgrid_delete ();

  static int physical_map_setup ();
  static int physical_map_delete ();
*/
#endif /* m__COMMUNICATOR_MPI_LAYOUT_H */