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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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