// Copyright 2004 The Trustees of Indiana University.
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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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// Authors: Douglas Gregor
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// Andrew Lumsdaine
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#ifndef BOOST_PARALLEL_ALGORITHM_HPP
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#define BOOST_PARALLEL_ALGORITHM_HPP
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#ifndef BOOST_GRAPH_USE_MPI
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#error "Parallel BGL files should not be included unless <boost/graph/use_mpi.hpp> has been included"
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#endif
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#include <boost/optional.hpp>
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#include <boost/config.hpp> // for BOOST_STATIC_CONSTANT
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#include <vector>
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#include <functional>
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namespace boost { namespace parallel {
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template<typename BinaryOp>
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struct is_commutative
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{
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BOOST_STATIC_CONSTANT(bool, value = false);
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};
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template<typename T>
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struct minimum : std::binary_function<T, T, T>
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{
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const T& operator()(const T& x, const T& y) const { return x < y? x : y; }
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};
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template<typename T>
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struct maximum : std::binary_function<T, T, T>
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{
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const T& operator()(const T& x, const T& y) const { return x < y? y : x; }
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};
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template<typename T>
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struct sum : std::binary_function<T, T, T>
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{
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const T operator()(const T& x, const T& y) const { return x + y; }
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};
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template<typename ProcessGroup, typename InputIterator,
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typename OutputIterator, typename BinaryOperation>
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OutputIterator
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reduce(ProcessGroup pg, typename ProcessGroup::process_id_type root,
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InputIterator first, InputIterator last, OutputIterator out,
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BinaryOperation bin_op);
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template<typename ProcessGroup, typename T, typename BinaryOperation>
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inline T
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all_reduce(ProcessGroup pg, const T& value, BinaryOperation bin_op)
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{
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T result;
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all_reduce(pg,
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const_cast<T*>(&value), const_cast<T*>(&value+1),
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&result, bin_op);
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return result;
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}
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template<typename ProcessGroup, typename T, typename BinaryOperation>
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inline T
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scan(ProcessGroup pg, const T& value, BinaryOperation bin_op)
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{
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T result;
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scan(pg,
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const_cast<T*>(&value), const_cast<T*>(&value+1),
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&result, bin_op);
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return result;
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}
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template<typename ProcessGroup, typename InputIterator, typename T>
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void
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all_gather(ProcessGroup pg, InputIterator first, InputIterator last,
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std::vector<T>& out);
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} } // end namespace boost::parallel
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#include <boost/graph/parallel/detail/inplace_all_to_all.hpp>
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#endif // BOOST_PARALLEL_ALGORITHM_HPP
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