1 | #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED |
---|---|
2 | #define BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED |
3 | |
4 | // (C) Copyright Greg Colvin and Beman Dawes 1998, 1999. |
5 | // Copyright (c) 2001, 2002 Peter Dimov |
6 | // |
7 | // Distributed under the Boost Software License, Version 1.0. (See |
8 | // accompanying file LICENSE_1_0.txt or copy at |
9 | // http://www.boost.org/LICENSE_1_0.txt) |
10 | // |
11 | // See http://www.boost.org/libs/smart_ptr/ for documentation. |
12 | |
13 | #include <boost/smart_ptr/detail/requires_cxx11.hpp> |
14 | #include <boost/config.hpp> |
15 | #include <boost/assert.hpp> |
16 | #include <boost/core/checked_delete.hpp> |
17 | #include <boost/smart_ptr/detail/sp_nullptr_t.hpp> |
18 | #include <boost/smart_ptr/detail/sp_disable_deprecated.hpp> |
19 | #include <boost/smart_ptr/detail/sp_noexcept.hpp> |
20 | #include <boost/config/workaround.hpp> |
21 | |
22 | #ifndef BOOST_NO_AUTO_PTR |
23 | # include <memory> // for std::auto_ptr |
24 | #endif |
25 | |
26 | #if defined( BOOST_SP_DISABLE_DEPRECATED ) |
27 | #pragma GCC diagnostic push |
28 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
29 | #endif |
30 | |
31 | namespace boost |
32 | { |
33 | |
34 | // Debug hooks |
35 | |
36 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
37 | |
38 | void sp_scalar_constructor_hook(void * p); |
39 | void sp_scalar_destructor_hook(void * p); |
40 | |
41 | #endif |
42 | |
43 | // scoped_ptr mimics a built-in pointer except that it guarantees deletion |
44 | // of the object pointed to, either on destruction of the scoped_ptr or via |
45 | // an explicit reset(). scoped_ptr is a simple solution for simple needs; |
46 | // use shared_ptr or std::auto_ptr if your needs are more complex. |
47 | |
48 | template<class T> class scoped_ptr // noncopyable |
49 | { |
50 | private: |
51 | |
52 | T * px; |
53 | |
54 | scoped_ptr(scoped_ptr const &); |
55 | scoped_ptr & operator=(scoped_ptr const &); |
56 | |
57 | typedef scoped_ptr<T> this_type; |
58 | |
59 | void operator==( scoped_ptr const& ) const; |
60 | void operator!=( scoped_ptr const& ) const; |
61 | |
62 | public: |
63 | |
64 | typedef T element_type; |
65 | |
66 | explicit scoped_ptr( T * p = 0 ) BOOST_SP_NOEXCEPT : px( p ) |
67 | { |
68 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
69 | boost::sp_scalar_constructor_hook( px ); |
70 | #endif |
71 | } |
72 | |
73 | #ifndef BOOST_NO_AUTO_PTR |
74 | |
75 | explicit scoped_ptr( std::auto_ptr<T> p ) BOOST_SP_NOEXCEPT : px( p.release() ) |
76 | { |
77 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
78 | boost::sp_scalar_constructor_hook( px ); |
79 | #endif |
80 | } |
81 | |
82 | #endif |
83 | |
84 | ~scoped_ptr() BOOST_SP_NOEXCEPT |
85 | { |
86 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) |
87 | boost::sp_scalar_destructor_hook( px ); |
88 | #endif |
89 | boost::checked_delete( px ); |
90 | } |
91 | |
92 | void reset(T * p = 0) BOOST_SP_NOEXCEPT_WITH_ASSERT |
93 | { |
94 | BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors |
95 | this_type(p).swap(*this); |
96 | } |
97 | |
98 | T & operator*() const BOOST_SP_NOEXCEPT_WITH_ASSERT |
99 | { |
100 | BOOST_ASSERT( px != 0 ); |
101 | return *px; |
102 | } |
103 | |
104 | T * operator->() const BOOST_SP_NOEXCEPT_WITH_ASSERT |
105 | { |
106 | BOOST_ASSERT( px != 0 ); |
107 | return px; |
108 | } |
109 | |
110 | T * get() const BOOST_SP_NOEXCEPT |
111 | { |
112 | return px; |
113 | } |
114 | |
115 | // implicit conversion to "bool" |
116 | #include <boost/smart_ptr/detail/operator_bool.hpp> |
117 | |
118 | void swap(scoped_ptr & b) BOOST_SP_NOEXCEPT |
119 | { |
120 | T * tmp = b.px; |
121 | b.px = px; |
122 | px = tmp; |
123 | } |
124 | }; |
125 | |
126 | #if !defined( BOOST_NO_CXX11_NULLPTR ) |
127 | |
128 | template<class T> inline bool operator==( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT |
129 | { |
130 | return p.get() == 0; |
131 | } |
132 | |
133 | template<class T> inline bool operator==( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_SP_NOEXCEPT |
134 | { |
135 | return p.get() == 0; |
136 | } |
137 | |
138 | template<class T> inline bool operator!=( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT |
139 | { |
140 | return p.get() != 0; |
141 | } |
142 | |
143 | template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_SP_NOEXCEPT |
144 | { |
145 | return p.get() != 0; |
146 | } |
147 | |
148 | #endif |
149 | |
150 | template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) BOOST_SP_NOEXCEPT |
151 | { |
152 | a.swap(b); |
153 | } |
154 | |
155 | // get_pointer(p) is a generic way to say p.get() |
156 | |
157 | template<class T> inline T * get_pointer(scoped_ptr<T> const & p) BOOST_SP_NOEXCEPT |
158 | { |
159 | return p.get(); |
160 | } |
161 | |
162 | } // namespace boost |
163 | |
164 | #if defined( BOOST_SP_DISABLE_DEPRECATED ) |
165 | #pragma GCC diagnostic pop |
166 | #endif |
167 | |
168 | #endif // #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED |
169 |