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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_ITERATOR_DETAIL_GET_BASE_ITERATOR_BUFFER_HPP | |
12 | #define BOOST_COMPUTE_ITERATOR_DETAIL_GET_BASE_ITERATOR_BUFFER_HPP | |
13 | ||
14 | namespace boost { | |
15 | namespace compute { | |
16 | namespace detail { | |
17 | ||
18 | // returns the buffer for an iterator adaptor's base iterator if | |
19 | // it exists, otherwise returns a null buffer object. | |
20 | template<class Iterator> | |
21 | inline const buffer& | |
22 | get_base_iterator_buffer(const Iterator &iter, | |
23 | typename boost::enable_if< | |
24 | is_buffer_iterator< | |
25 | typename Iterator::base_type | |
26 | > | |
27 | >::type* = 0) | |
28 | { | |
29 | return iter.base().get_buffer(); | |
30 | } | |
31 | ||
32 | template<class Iterator> | |
33 | inline const buffer& | |
34 | get_base_iterator_buffer(const Iterator &iter, | |
35 | typename boost::disable_if< | |
36 | is_buffer_iterator< | |
37 | typename Iterator::base_type | |
38 | > | |
39 | >::type* = 0) | |
40 | { | |
41 | (void) iter; | |
42 | ||
43 | static buffer null_buffer; | |
44 | ||
45 | return null_buffer; | |
46 | } | |
47 | ||
48 | } // end detail namespace | |
49 | } // end compute namespace | |
50 | } // end boost namespace | |
51 | ||
52 | #endif // BOOST_COMPUTE_ITERATOR_DETAIL_GET_BASE_ITERATOR_BUFFER_HPP |