]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | |
2 | // helper code for dealing with tracking non-boost shared_ptr/weak_ptr | |
3 | ||
4 | // Copyright Frank Mori Hess 2009. | |
5 | // Distributed under the Boost Software License, Version | |
6 | // 1.0. (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/signals2 for library home page. | |
10 | ||
11 | #ifndef BOOST_SIGNALS2_FOREIGN_PTR_HPP | |
12 | #define BOOST_SIGNALS2_FOREIGN_PTR_HPP | |
13 | ||
14 | #include <algorithm> | |
15 | #include <boost/config.hpp> | |
16 | #include <boost/assert.hpp> | |
17 | #include <boost/scoped_ptr.hpp> | |
18 | #include <boost/smart_ptr/bad_weak_ptr.hpp> | |
19 | #include <boost/utility/swap.hpp> | |
20 | ||
21 | #ifndef BOOST_NO_CXX11_SMART_PTR | |
22 | #include <memory> | |
23 | #endif | |
24 | ||
25 | namespace boost | |
26 | { | |
27 | template<typename T> class shared_ptr; | |
28 | template<typename T> class weak_ptr; | |
29 | ||
30 | namespace signals2 | |
31 | { | |
32 | template<typename WeakPtr> struct weak_ptr_traits | |
33 | {}; | |
34 | template<typename T> struct weak_ptr_traits<boost::weak_ptr<T> > | |
35 | { | |
36 | typedef boost::shared_ptr<T> shared_type; | |
37 | }; | |
38 | #ifndef BOOST_NO_CXX11_SMART_PTR | |
39 | template<typename T> struct weak_ptr_traits<std::weak_ptr<T> > | |
40 | { | |
41 | typedef std::shared_ptr<T> shared_type; | |
42 | }; | |
43 | #endif | |
44 | ||
45 | template<typename SharedPtr> struct shared_ptr_traits | |
46 | {}; | |
47 | ||
48 | template<typename T> struct shared_ptr_traits<boost::shared_ptr<T> > | |
49 | { | |
50 | typedef boost::weak_ptr<T> weak_type; | |
51 | }; | |
52 | #ifndef BOOST_NO_CXX11_SMART_PTR | |
53 | template<typename T> struct shared_ptr_traits<std::shared_ptr<T> > | |
54 | { | |
55 | typedef std::weak_ptr<T> weak_type; | |
56 | }; | |
57 | #endif | |
58 | ||
59 | namespace detail | |
60 | { | |
61 | struct foreign_shared_ptr_impl_base | |
62 | { | |
63 | virtual ~foreign_shared_ptr_impl_base() {} | |
64 | virtual foreign_shared_ptr_impl_base * clone() const = 0; | |
65 | }; | |
66 | ||
67 | template<typename FSP> | |
68 | class foreign_shared_ptr_impl: public foreign_shared_ptr_impl_base | |
69 | { | |
70 | public: | |
71 | foreign_shared_ptr_impl(const FSP &p): _p(p) | |
72 | {} | |
73 | virtual foreign_shared_ptr_impl * clone() const | |
74 | { | |
75 | return new foreign_shared_ptr_impl(*this); | |
76 | } | |
77 | private: | |
78 | FSP _p; | |
79 | }; | |
80 | ||
81 | class foreign_void_shared_ptr | |
82 | { | |
83 | public: | |
84 | foreign_void_shared_ptr(): | |
85 | _p(0) | |
86 | {} | |
87 | foreign_void_shared_ptr(const foreign_void_shared_ptr &other): | |
88 | _p(other._p->clone()) | |
89 | {} | |
90 | template<typename FSP> | |
91 | explicit foreign_void_shared_ptr(const FSP &fsp): | |
92 | _p(new foreign_shared_ptr_impl<FSP>(fsp)) | |
93 | {} | |
94 | ~foreign_void_shared_ptr() | |
95 | { | |
96 | delete _p; | |
97 | } | |
98 | foreign_void_shared_ptr & operator=(const foreign_void_shared_ptr &other) | |
99 | { | |
100 | if(&other == this) return *this; | |
101 | foreign_void_shared_ptr(other).swap(*this); | |
102 | return *this; | |
103 | } | |
104 | void swap(foreign_void_shared_ptr &other) | |
105 | { | |
106 | boost::swap(_p, other._p); | |
107 | } | |
108 | private: | |
109 | foreign_shared_ptr_impl_base *_p; | |
110 | }; | |
111 | ||
112 | struct foreign_weak_ptr_impl_base | |
113 | { | |
114 | virtual ~foreign_weak_ptr_impl_base() {} | |
115 | virtual foreign_void_shared_ptr lock() const = 0; | |
116 | virtual bool expired() const = 0; | |
117 | virtual foreign_weak_ptr_impl_base * clone() const = 0; | |
118 | }; | |
119 | ||
120 | template<typename FWP> | |
121 | class foreign_weak_ptr_impl: public foreign_weak_ptr_impl_base | |
122 | { | |
123 | public: | |
124 | foreign_weak_ptr_impl(const FWP &p): _p(p) | |
125 | {} | |
126 | virtual foreign_void_shared_ptr lock() const | |
127 | { | |
128 | return foreign_void_shared_ptr(_p.lock()); | |
129 | } | |
130 | virtual bool expired() const | |
131 | { | |
132 | return _p.expired(); | |
133 | } | |
134 | virtual foreign_weak_ptr_impl * clone() const | |
135 | { | |
136 | return new foreign_weak_ptr_impl(*this); | |
137 | } | |
138 | private: | |
139 | FWP _p; | |
140 | }; | |
141 | ||
142 | class foreign_void_weak_ptr | |
143 | { | |
144 | public: | |
145 | foreign_void_weak_ptr() | |
146 | {} | |
147 | foreign_void_weak_ptr(const foreign_void_weak_ptr &other): | |
148 | _p(other._p->clone()) | |
149 | {} | |
150 | template<typename FWP> | |
151 | explicit foreign_void_weak_ptr(const FWP &fwp): | |
152 | _p(new foreign_weak_ptr_impl<FWP>(fwp)) | |
153 | {} | |
154 | foreign_void_weak_ptr & operator=(const foreign_void_weak_ptr &other) | |
155 | { | |
156 | if(&other == this) return *this; | |
157 | foreign_void_weak_ptr(other).swap(*this); | |
158 | return *this; | |
159 | } | |
160 | void swap(foreign_void_weak_ptr &other) | |
161 | { | |
162 | boost::swap(_p, other._p); | |
163 | } | |
164 | foreign_void_shared_ptr lock() const | |
165 | { | |
166 | return _p->lock(); | |
167 | } | |
168 | bool expired() const | |
169 | { | |
170 | return _p->expired(); | |
171 | } | |
172 | private: | |
173 | boost::scoped_ptr<foreign_weak_ptr_impl_base> _p; | |
174 | }; | |
175 | } // namespace detail | |
176 | ||
177 | } // namespace signals2 | |
178 | } // namespace boost | |
179 | ||
180 | #endif // BOOST_SIGNALS2_FOREIGN_PTR_HPP |