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1 | //---------------------------------------------------------------------------// |
2 | // Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com> | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0 | |
5 | // See accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt | |
7 | // | |
8 | // See http://boostorg.github.com/compute for more information. | |
9 | //---------------------------------------------------------------------------// | |
10 | ||
11 | #ifndef BOOST_COMPUTE_ALGORITHM_SWAP_RANGES_HPP | |
12 | #define BOOST_COMPUTE_ALGORITHM_SWAP_RANGES_HPP | |
13 | ||
14 | #include <boost/compute/system.hpp> | |
15 | #include <boost/compute/command_queue.hpp> | |
16 | #include <boost/compute/algorithm/copy.hpp> | |
17 | #include <boost/compute/container/vector.hpp> | |
18 | ||
19 | namespace boost { | |
20 | namespace compute { | |
21 | ||
22 | /// Swaps the elements in the range [\p first1, \p last1) with the | |
23 | /// elements in the range beginning at \p first2. | |
24 | template<class Iterator1, class Iterator2> | |
25 | inline Iterator2 swap_ranges(Iterator1 first1, | |
26 | Iterator1 last1, | |
27 | Iterator2 first2, | |
28 | command_queue &queue = system::default_queue()) | |
29 | { | |
30 | typedef typename std::iterator_traits<Iterator1>::value_type value_type; | |
31 | ||
32 | Iterator2 last2 = first2 + std::distance(first1, last1); | |
33 | ||
34 | ::boost::compute::vector<value_type> tmp(first1, last1, queue); | |
35 | ::boost::compute::copy(first2, last2, first1, queue); | |
36 | ::boost::compute::copy(tmp.begin(), tmp.end(), first2, queue); | |
37 | ||
38 | return last2; | |
39 | } | |
40 | ||
41 | } // end compute namespace | |
42 | } // end boost namespace | |
43 | ||
44 | #endif // BOOST_COMPUTE_ALGORITHM_SWAP_RANGES_HPP |