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// Copyright Alain Miniussi 2014.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Authors: Alain Miniussi
#include <vector>
#include <iostream>
#include <boost/mpi/communicator.hpp>
#include <boost/mpi/collectives.hpp>
#include <boost/mpi/environment.hpp>
#include <boost/mpi/cartesian_communicator.hpp>
namespace mpi = boost::mpi;
// Curly brace init make this useless, but
// - Need to support obsolete like g++ 4.3.x. for some reason
// - Can't conditionnaly compile with bjam (unless you find
// the doc, and read it, which would only make sense if you
// actually wan't to use bjam, which does not (make sense))
typedef mpi::cartesian_dimension cd;
int main(int argc, char* argv[])
{
mpi::environment env;
mpi::communicator world;
if (world.size() != 24) return -1;
mpi::cartesian_dimension dims[] = {cd(2, true), cd(3,true), cd(4,true)};
mpi::cartesian_communicator cart(world, mpi::cartesian_topology(dims));
for (int r = 0; r < cart.size(); ++r) {
cart.barrier();
if (r == cart.rank()) {
std::vector<int> c = cart.coordinates(r);
std::cout << "rk :" << r << " coords: "
<< c[0] << ' ' << c[1] << ' ' << c[2] << '\n';
}
}
return 0;
}
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