exchange.h

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/*
 * @file exchange.h
 *
 * @copyright Copyright (C) 2024 Enrico Degregori <enrico.degregori@gmail.com>
 *
 * @author Enrico Degregori <enrico.degregori@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef EXCHANGE_H
#define EXCHANGE_H
 
#include "src/core/algorithm/map.h"
#include "src/setup/setting.h"
#include "src/core/exchange/backend_communication/backend_mpi.h"
#include "src/core/exchange/backend_hardware/backend_cpu.h"
#ifdef CUDA
#include "src/core/exchange/backend_hardware/backend_cuda.h"
#endif
 
struct t_exchange {
    int count;
    int buffer_size;
    void *buffer;
    int *buffer_idxlist;
};
typedef struct t_exchange t_exchange;
 
typedef void (*backend_func_wait) (t_mpi_exchange*);
 
struct t_wait {
    backend_func_wait pre_wait;
    backend_func_wait post_wait;
};
typedef struct t_wait t_wait;
 
typedef void (*backend_func_go) (t_exchange *, t_exchange*,  t_map*, t_kernels*,
                                 t_mpi_exchange*, t_wait*, void*, void *, int *, int*);
 
struct t_exchanger {
    t_exchange *exch_send;
    t_exchange *exch_recv;
    t_kernels* vtable;
    backend_func_go go;
    t_wait* vtable_wait;
    t_map *map;
    t_mpi_exchange *mpi_exchange;
};
typedef struct t_exchanger t_exchanger;
 
t_exchanger* new_exchanger(t_map        *map  ,
                           MPI_Datatype  type ,
                           distdir_hardware hw);
 
void exchanger_go(t_exchanger  *exchanger    ,
                  void         *src_data     ,
                  void         *dst_data     );
 
void exchanger_go_with_transform(t_exchanger  *exchanger    ,
                                 void         *src_data     ,
                                 void         *dst_data     ,
                                 int          *transform_src,
                                 int          *transform_dst);
 
void delete_exchanger(t_exchanger * exchanger);
 
#endif