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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2008 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpi.h"
int main(int argc, char *argv[])
{
int myrank, size, src = 0, dest = 1;
int buf[20];
MPI_Init(0, 0);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
if (myrank == src || myrank == dest) {
int partner = src;
if (myrank == partner)
partner = dest;
MPI_Sendrecv(MPI_BOTTOM, 0, MPI_INT, partner, 0,
MPI_BOTTOM, 0, MPI_INT, partner, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
}
if (myrank == src) {
MPI_Send(buf, 20, MPI_INT, dest, 0, MPI_COMM_WORLD);
} else if (myrank == dest) {
MPI_Recv(buf, 20, MPI_INT, src, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
}
MPI_Finalize();
return 0;
}
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