39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
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// Copyright 2005 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_BASIC_REDUCE_HPP
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#define BOOST_PARALLEL_BASIC_REDUCE_HPP
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namespace boost { namespace parallel {
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/** Reduction operation used to reconcile differences between local
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* and remote values for a particular key in a property map. The
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* type @c T is typically the @c value_type of the property
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* map. This basic reduction returns a default-constructed @c T as
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* the default value and always resolves to the remote value.
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*/
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template<typename T>
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struct basic_reduce
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{
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BOOST_STATIC_CONSTANT(bool, non_default_resolver = false);
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/// Returns a default-constructed T object
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template<typename Key>
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T operator()(const Key&) const { return T(); }
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/// Returns the remote value
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template<typename Key>
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const T& operator()(const Key&, const T&, const T& remote) const
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{ return remote; }
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};
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} } // end namespace boost::parallel
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#endif // BOOST_PARALLEL_BASIC_REDUCE_HPP
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