109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
// Copyright (C) 2005-2006 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 test of the all_gather() collective.
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#include <boost/mpi/collectives/all_gather.hpp>
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#include <boost/mpi/environment.hpp>
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#include <boost/mpi/communicator.hpp>
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#include <boost/test/minimal.hpp>
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#include <algorithm>
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#include "gps_position.hpp"
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#include <boost/serialization/string.hpp>
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#include <boost/serialization/list.hpp>
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#include <boost/iterator/counting_iterator.hpp>
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#include <boost/lexical_cast.hpp>
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using boost::mpi::communicator;
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using boost::mpi::packed_skeleton_iarchive;
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using boost::mpi::packed_skeleton_oarchive;
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template<typename Generator>
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void
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all_gather_test(const communicator& comm, Generator generator,
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const char* kind)
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{
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typedef typename Generator::result_type value_type;
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value_type value = generator(comm.rank());
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using boost::mpi::all_gather;
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std::vector<value_type> values;
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if (comm.rank() == 0) {
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std::cout << "Gathering " << kind << "...";
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std::cout.flush();
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}
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all_gather(comm, value, values);
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std::vector<value_type> expected_values;
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for (int p = 0; p < comm.size(); ++p)
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expected_values.push_back(generator(p));
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BOOST_CHECK(values == expected_values);
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if (comm.rank() == 0 && values == expected_values)
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std::cout << "OK." << std::endl;
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(comm.barrier)();
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}
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// Generates integers to test with gather()
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struct int_generator
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{
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typedef int result_type;
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int operator()(int p) const { return 17 + p; }
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};
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// Generates GPS positions to test with gather()
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struct gps_generator
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{
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typedef gps_position result_type;
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gps_position operator()(int p) const
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{
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return gps_position(39 + p, 16, 20.2799);
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}
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};
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struct string_generator
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{
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typedef std::string result_type;
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std::string operator()(int p) const
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{
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std::string result = boost::lexical_cast<std::string>(p);
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result += " rosebud";
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if (p != 1) result += 's';
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return result;
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}
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};
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struct string_list_generator
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{
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typedef std::list<std::string> result_type;
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std::list<std::string> operator()(int p) const
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{
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std::list<std::string> result;
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for (int i = 0; i <= p; ++i) {
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std::string value = boost::lexical_cast<std::string>(i);
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result.push_back(value);
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}
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return result;
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}
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};
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int test_main(int argc, char* argv[])
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{
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boost::mpi::environment env(argc, argv);
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communicator comm;
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all_gather_test(comm, int_generator(), "integers");
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all_gather_test(comm, gps_generator(), "GPS positions");
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all_gather_test(comm, string_generator(), "string");
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all_gather_test(comm, string_list_generator(), "list of strings");
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return 0;
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}
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