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- // Copyright (C) 2006 Douglas Gregor <doug.gregor@gmail.com>
- // Use, modification and distribution is subject to 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)
- // A simple Hello, world! example using Boost.MPI message passing.
- #include <boost/mpi.hpp>
- #include <iostream>
- #include <boost/serialization/string.hpp> // Needed to send/receive strings!
- namespace mpi = boost::mpi;
- int main(int argc, char* argv[])
- {
- mpi::environment env(argc, argv);
- mpi::communicator world;
- if (world.rank() == 0) {
- mpi::request reqs[2];
- std::string msg, out_msg = "Hello";
- reqs[0] = world.isend(1, 0, out_msg);
- reqs[1] = world.irecv(1, 1, msg);
- mpi::wait_all(reqs, reqs + 2);
- std::cout << msg << "!" << std::endl;
- } else {
- mpi::request reqs[2];
- std::string msg, out_msg = "world";
- reqs[0] = world.isend(0, 1, out_msg);
- reqs[1] = world.irecv(0, 0, msg);
- mpi::wait_all(reqs, reqs + 2);
- std::cout << msg << ", ";
- }
- return 0;
- }
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