56 lines
1.9 KiB
Plaintext
56 lines
1.9 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_COUNT_HPP
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#define BOOST_COMPUTE_ALGORITHM_COUNT_HPP
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#include <boost/compute/lambda.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/algorithm/count_if.hpp>
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#include <boost/compute/type_traits/vector_size.hpp>
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namespace boost {
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namespace compute {
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/// Returns the number of occurrences of \p value in the range
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/// [\p first, \p last).
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///
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/// \see count_if()
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template<class InputIterator, class T>
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inline size_t count(InputIterator first,
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InputIterator last,
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const T &value,
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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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using ::boost::compute::_1;
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using ::boost::compute::lambda::all;
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if(vector_size<value_type>::value == 1){
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return ::boost::compute::count_if(first,
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last,
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_1 == value,
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queue);
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}
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else {
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return ::boost::compute::count_if(first,
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last,
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all(_1 == value),
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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_COUNT_HPP
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