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Diffstat (limited to 'src/boost/libs/mpi/example/random_scatter.cpp')
-rw-r--r-- | src/boost/libs/mpi/example/random_scatter.cpp | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/boost/libs/mpi/example/random_scatter.cpp b/src/boost/libs/mpi/example/random_scatter.cpp new file mode 100644 index 00000000..fc8879e4 --- /dev/null +++ b/src/boost/libs/mpi/example/random_scatter.cpp @@ -0,0 +1,37 @@ +// 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) + +// An example using Boost.MPI's gather(): [main] + +#include <boost/mpi.hpp> +#include <boost/mpi/collectives.hpp> +#include <iostream> +#include <cstdlib> +#include <vector> + +namespace mpi = boost::mpi; + +int main(int argc, char* argv[]) +{ + mpi::environment env(argc, argv); + mpi::communicator world; + + std::srand(time(0) + world.rank()); + std::vector<int> all; + int mine = -1; + if (world.rank() == 0) { + all.resize(world.size()); + std::generate(all.begin(), all.end(), std::rand); + } + mpi::scatter(world, all, mine, 0); + for (int r = 0; r < world.size(); ++r) { + world.barrier(); + if (r == world.rank()) { + std::cout << "Rank " << r << " got " << mine << '\n'; + } + } + return 0; +} |