Imported from /home/lorry/working-area/delta_boost-tarball/boost_1_54_0.tar.bz2.boost_1_54_0baserock/morph

1 files changed, 36 insertions, 0 deletions

diff --git a/libs/mpi/example/hello_world_nonblocking.cpp b/libs/mpi/example/hello_world_nonblocking.cpp
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+++ b/libs/mpi/example/hello_world_nonblocking.cpp
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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;
+}