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/* Copyright (c) 2012-2018. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include <stdio.h>
#include "mpi.h"
int main(int argc, char *argv[])
{
int rank;
int size;
MPI_Datatype type;
MPI_Datatype type2;
int blocklen[3] = {2, 3, 1};
int displacement[3] = {0, 3, 8};
int buffer[27];
MPI_Status status;
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size < 2) {
printf("Please run with 2 processes.\n");
MPI_Finalize();
return 1;
}
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Type_contiguous(3, MPI_INT, &type2);
MPI_Type_commit(&type2);
MPI_Type_indexed(3, blocklen, displacement, type2, &type);
MPI_Type_commit(&type);
if (rank == 0) {
for (int i = 0; i < 27; i++)
buffer[i] = i;
MPI_Send(buffer, 1, type, 1, 123, MPI_COMM_WORLD);
}
if (rank == 1) {
for (int i = 0; i < 27; i++)
buffer[i] = -1;
MPI_Recv(buffer, 1, type, 0, 123, MPI_COMM_WORLD, &status);
for (int i = 0; i < 27; i++)
printf("buffer[%d] = %d\n", i, buffer[i]);
fflush(stdout);
}
MPI_Type_free(&type);
MPI_Type_free(&type2);
MPI_Finalize();
return 0;
}
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