37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
// Copyright (C) 2006 Douglas Gregor <doug.gregor@gmail.com>
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// A simple Hello, world! example using Boost.MPI message passing.
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#include <boost/mpi.hpp>
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#include <iostream>
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#include <boost/serialization/string.hpp> // Needed to send/receive strings!
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namespace mpi = boost::mpi;
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int main(int argc, char* argv[])
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{
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mpi::environment env(argc, argv);
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mpi::communicator world;
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if (world.rank() == 0) {
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mpi::request reqs[2];
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std::string msg, out_msg = "Hello";
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reqs[0] = world.isend(1, 0, out_msg);
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reqs[1] = world.irecv(1, 1, msg);
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mpi::wait_all(reqs, reqs + 2);
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std::cout << msg << "!" << std::endl;
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} else {
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mpi::request reqs[2];
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std::string msg, out_msg = "world";
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reqs[0] = world.isend(0, 1, out_msg);
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reqs[1] = world.irecv(0, 0, msg);
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mpi::wait_all(reqs, reqs + 2);
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std::cout << msg << ", ";
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}
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return 0;
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}
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