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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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