75 lines
2.5 KiB
Plaintext
75 lines
2.5 KiB
Plaintext
//---------------------------------------------------------------------------//
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// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// 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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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#ifndef BOOST_COMPUTE_ALGORITHM_MAX_ELEMENT_HPP
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#define BOOST_COMPUTE_ALGORITHM_MAX_ELEMENT_HPP
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#include <boost/compute/system.hpp>
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#include <boost/compute/command_queue.hpp>
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#include <boost/compute/functional.hpp>
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#include <boost/compute/algorithm/detail/find_extrema.hpp>
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namespace boost {
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namespace compute {
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/// Returns an iterator pointing to the element in the range
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/// [\p first, \p last) with the maximum value.
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///
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/// \param first first element in the input range
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/// \param last last element in the input range
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/// \param compare comparison function object which returns true if the first
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/// argument is less than (i.e. is ordered before) the second.
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/// \param queue command queue to perform the operation
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///
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/// For example, to find \c int2 value with maximum first component in given vector:
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/// \code
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/// // comparison function object
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/// BOOST_COMPUTE_FUNCTION(bool, compare_first, (const int2_ &a, const int2_ &b),
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/// {
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/// return a.x < b.x;
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/// });
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///
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/// // create vector
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/// boost::compute::vector<uint2_> data = ...
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///
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/// boost::compute::vector<uint2_>::iterator max =
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/// boost::compute::max_element(data.begin(), data.end(), compare_first, queue);
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/// \endcode
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///
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/// \see min_element()
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template<class InputIterator, class Compare>
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inline InputIterator
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max_element(InputIterator first,
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InputIterator last,
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Compare compare,
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command_queue &queue = system::default_queue())
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{
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return detail::find_extrema(first, last, compare, false, queue);
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}
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///\overload
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template<class InputIterator>
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inline InputIterator
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max_element(InputIterator first,
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InputIterator last,
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command_queue &queue = system::default_queue())
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{
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typedef typename std::iterator_traits<InputIterator>::value_type value_type;
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return ::boost::compute::max_element(
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first, last, ::boost::compute::less<value_type>(), queue
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);
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}
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} // end compute namespace
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} // end boost namespace
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#endif // BOOST_COMPUTE_ALGORITHM_MAX_ELEMENT_HPP
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