mpi_exch.c File Reference

Functions to exchange boundary data via MPI. More...

#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <mpi.h>
#include "../../util/source/compiler.h"
#include "../../util/source/logfile.h"
#include "../source/mb_cns.h"
#include "mpi_cns.h"

Functions
int	allocate_send_and_receive_buffers (struct block_data *bd)
	Allocate memory for the MPI send and receive buffers.
int	make_tag (int block_id, int bndry)
	Returns a tag that should be unique for each block and boundary combination.
int	mpi_exchange_boundary_data (struct global_data *G, struct block_data bd[], int jb, int type_of_copy)
	Ensure that all boundary data is exchanged between connected boundaries on adjacent blocks.
int	copy_into_send_buffer (struct block_data *bd, int bndry, int type_of_copy)
	Copy data into the send buffer from the appropriate boundary of the current block.
int	copy_from_receive_buffer (struct block_data *bd, int bndry, int type_of_copy)
	Copy data from the receive buffer into the appropriate boundary of the current block.
Variables
double *	send_buffer [4]
double *	receive_buffer [4]

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Detailed Description

Functions to exchange boundary data via MPI.

Author:

PA Jacobs and RJ Goozee

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Function Documentation

int allocate_send_and_receive_buffers (  struct block_data *  bd  )

Allocate memory for the MPI send and receive buffers. Parameters: bd  : a pointer to the block_data structure Returns: 0 if successful, 1 otherwise.

int copy_from_receive_buffer (  struct block_data *  bd, int  bndry, int  type_of_copy )

Copy data from the receive buffer into the appropriate boundary of the current block. See workbook page 33, 18-Jun-02 for details of order. Parameters: bd  : pointer to the target block bndry  : value specifying the block boundary type_of_copy  :

int copy_into_send_buffer (  struct block_data *  bd, int  bndry, int  type_of_copy )

Copy data into the send buffer from the appropriate boundary of the current block. See workbook page 33, 18-Jun-02 for details of order. Parameters: bd  : pointer to the target block bndry  : value specifying the source block boundary type_of_copy  : sometimes we want to copy cell geometry, other times the flow data

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