cs_crystal_router.h

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#ifndef __CS_CRYSTAL_ROUTER_H__
#define __CS_CRYSTAL_ROUTER_H__

/*============================================================================
 * Crystal Router parallel exchange algorithm based operations.
 *============================================================================*/

/*
  This file is part of Code_Saturne, a general-purpose CFD tool.

  Copyright (C) 1998-2018 EDF S.A.

  This program is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2 of the License, or (at your option) any later
  version.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
  Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/*----------------------------------------------------------------------------*/

#if defined(HAVE_MPI)
#include <mpi.h>
#endif

/*----------------------------------------------------------------------------
 *  Local headers
 *----------------------------------------------------------------------------*/

#include "cs_defs.h"
#include "cs_block_dist.h"

/*----------------------------------------------------------------------------*/

BEGIN_C_DECLS

/*=============================================================================
 * Macro definitions
 *============================================================================*/

#define CS_CRYSTAL_ROUTER_USE_DEST_ID         (1 << 0)

#define CS_CRYSTAL_ROUTER_ADD_SRC_ID          (1 << 1)
#define CS_CRYSTAL_ROUTER_ADD_SRC_RANK        (1 << 2)

/*============================================================================
 * Type definitions
 *============================================================================*/

/* Opaque crystal router structure */

#if defined(HAVE_MPI)

typedef struct _cs_crystal_router_t  cs_crystal_router_t;

#endif

/*=============================================================================
 * Public function prototypes
 *============================================================================*/

#if defined(HAVE_MPI)

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

cs_crystal_router_t *
cs_crystal_router_create_s(size_t            n_elts,
                           int               stride,
                           cs_datatype_t     datatype,
                           int               flags,
                           const void       *elt,
                           const cs_lnum_t  *dest_id,
                           const int         dest_rank[],
                           MPI_Comm          comm);

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

cs_crystal_router_t *
cs_crystal_router_create_i(size_t            n_elts,
                           cs_datatype_t     datatype,
                           int               flags,
                           const cs_lnum_t  *eld_idx,
                           const void       *elt,
                           const cs_lnum_t  *dest_id,
                           const int         dest_rank[],
                           MPI_Comm          comm);

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

void
cs_crystal_router_destroy(cs_crystal_router_t  **cr);

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

void
cs_crystal_router_exchange(cs_crystal_router_t  *cr);

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

cs_lnum_t
cs_crystal_router_n_elts(const cs_crystal_router_t  *cr);

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

void
cs_crystal_router_get_data(cs_crystal_router_t   *cr,
                           int                  **src_rank,
                           cs_lnum_t            **dest_id,
                           cs_lnum_t            **src_id,
                           cs_lnum_t            **data_index,
                           void                 **data);

#endif /* defined(HAVE_MPI) */

/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/

void
cs_crystal_router_log_finalize(void);

/*----------------------------------------------------------------------------*/

END_C_DECLS

#endif /* __CS_CRYSTAL_ROUTER_H__ */