1 | ///////////////////////////////////////////////////////////////////////////// |
---|---|
2 | // |
3 | // (C) Copyright Ion Gaztanaga 2014-2014 |
4 | // |
5 | // Distributed under the Boost Software License, Version 1.0. |
6 | // (See accompanying file LICENSE_1_0.txt or copy at |
7 | // http://www.boost.org/LICENSE_1_0.txt) |
8 | // |
9 | // See http://www.boost.org/libs/intrusive for documentation. |
10 | // |
11 | ///////////////////////////////////////////////////////////////////////////// |
12 | |
13 | #ifndef BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP |
14 | #define BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP |
15 | |
16 | #ifndef BOOST_CONFIG_HPP |
17 | # include <boost/config.hpp> |
18 | #endif |
19 | |
20 | #if defined(BOOST_HAS_PRAGMA_ONCE) |
21 | # pragma once |
22 | #endif |
23 | |
24 | #include <boost/intrusive/detail/workaround.hpp> |
25 | |
26 | namespace boost { |
27 | namespace intrusive { |
28 | namespace detail { |
29 | |
30 | template<bool ConstantSize, class SizeType, class Tag = void> |
31 | struct size_holder |
32 | { |
33 | static const bool constant_time_size = ConstantSize; |
34 | typedef SizeType size_type; |
35 | |
36 | BOOST_INTRUSIVE_FORCEINLINE SizeType get_size() const |
37 | { return size_; } |
38 | |
39 | BOOST_INTRUSIVE_FORCEINLINE void set_size(SizeType size) |
40 | { size_ = size; } |
41 | |
42 | BOOST_INTRUSIVE_FORCEINLINE void decrement() |
43 | { --size_; } |
44 | |
45 | BOOST_INTRUSIVE_FORCEINLINE void increment() |
46 | { ++size_; } |
47 | |
48 | BOOST_INTRUSIVE_FORCEINLINE void increase(SizeType n) |
49 | { size_ += n; } |
50 | |
51 | BOOST_INTRUSIVE_FORCEINLINE void decrease(SizeType n) |
52 | { size_ -= n; } |
53 | |
54 | BOOST_INTRUSIVE_FORCEINLINE void swap(size_holder &other) |
55 | { SizeType tmp(size_); size_ = other.size_; other.size_ = tmp; } |
56 | |
57 | SizeType size_; |
58 | }; |
59 | |
60 | template<class SizeType, class Tag> |
61 | struct size_holder<false, SizeType, Tag> |
62 | { |
63 | static const bool constant_time_size = false; |
64 | typedef SizeType size_type; |
65 | |
66 | BOOST_INTRUSIVE_FORCEINLINE size_type get_size() const |
67 | { return 0; } |
68 | |
69 | BOOST_INTRUSIVE_FORCEINLINE void set_size(size_type) |
70 | {} |
71 | |
72 | BOOST_INTRUSIVE_FORCEINLINE void decrement() |
73 | {} |
74 | |
75 | BOOST_INTRUSIVE_FORCEINLINE void increment() |
76 | {} |
77 | |
78 | BOOST_INTRUSIVE_FORCEINLINE void increase(SizeType) |
79 | {} |
80 | |
81 | BOOST_INTRUSIVE_FORCEINLINE void decrease(SizeType) |
82 | {} |
83 | |
84 | BOOST_INTRUSIVE_FORCEINLINE void swap(size_holder){} |
85 | }; |
86 | |
87 | } //namespace detail{ |
88 | } //namespace intrusive{ |
89 | } //namespace boost{ |
90 | |
91 | #endif //BOOST_INTRUSIVE_DETAIL_SIZE_HOLDER_HPP |
92 |