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1 | #ifndef BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED |
2 | #define BOOST_SMART_PTR_SCOPED_ARRAY_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 | // http://www.boost.org/libs/smart_ptr/scoped_array.htm | |
12 | // | |
13 | ||
14 | #include <boost/config.hpp> | |
15 | #include <boost/assert.hpp> | |
16 | #include <boost/checked_delete.hpp> | |
17 | #include <boost/smart_ptr/detail/sp_nullptr_t.hpp> | |
18 | ||
19 | #include <boost/detail/workaround.hpp> | |
20 | ||
21 | #include <cstddef> // for std::ptrdiff_t | |
22 | ||
23 | namespace boost | |
24 | { | |
25 | ||
26 | // Debug hooks | |
27 | ||
28 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
29 | ||
30 | void sp_array_constructor_hook(void * p); | |
31 | void sp_array_destructor_hook(void * p); | |
32 | ||
33 | #endif | |
34 | ||
35 | // scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to | |
36 | // is guaranteed, either on destruction of the scoped_array or via an explicit | |
37 | // reset(). Use shared_array or std::vector if your needs are more complex. | |
38 | ||
39 | template<class T> class scoped_array // noncopyable | |
40 | { | |
41 | private: | |
42 | ||
43 | T * px; | |
44 | ||
45 | scoped_array(scoped_array const &); | |
46 | scoped_array & operator=(scoped_array const &); | |
47 | ||
48 | typedef scoped_array<T> this_type; | |
49 | ||
50 | void operator==( scoped_array const& ) const; | |
51 | void operator!=( scoped_array const& ) const; | |
52 | ||
53 | public: | |
54 | ||
55 | typedef T element_type; | |
56 | ||
57 | explicit scoped_array( T * p = 0 ) BOOST_NOEXCEPT : px( p ) | |
58 | { | |
59 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
60 | boost::sp_array_constructor_hook( px ); | |
61 | #endif | |
62 | } | |
63 | ||
64 | ~scoped_array() // never throws | |
65 | { | |
66 | #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
67 | boost::sp_array_destructor_hook( px ); | |
68 | #endif | |
69 | boost::checked_array_delete( px ); | |
70 | } | |
71 | ||
72 | void reset(T * p = 0) // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT) | |
73 | { | |
74 | BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors | |
75 | this_type(p).swap(*this); | |
76 | } | |
77 | ||
78 | T & operator[](std::ptrdiff_t i) const // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT) | |
79 | { | |
80 | BOOST_ASSERT( px != 0 ); | |
81 | BOOST_ASSERT( i >= 0 ); | |
82 | return px[i]; | |
83 | } | |
84 | ||
85 | T * get() const BOOST_NOEXCEPT | |
86 | { | |
87 | return px; | |
88 | } | |
89 | ||
90 | // implicit conversion to "bool" | |
91 | #include <boost/smart_ptr/detail/operator_bool.hpp> | |
92 | ||
93 | void swap(scoped_array & b) BOOST_NOEXCEPT | |
94 | { | |
95 | T * tmp = b.px; | |
96 | b.px = px; | |
97 | px = tmp; | |
98 | } | |
99 | }; | |
100 | ||
101 | #if !defined( BOOST_NO_CXX11_NULLPTR ) | |
102 | ||
103 | template<class T> inline bool operator==( scoped_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT | |
104 | { | |
105 | return p.get() == 0; | |
106 | } | |
107 | ||
108 | template<class T> inline bool operator==( boost::detail::sp_nullptr_t, scoped_array<T> const & p ) BOOST_NOEXCEPT | |
109 | { | |
110 | return p.get() == 0; | |
111 | } | |
112 | ||
113 | template<class T> inline bool operator!=( scoped_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT | |
114 | { | |
115 | return p.get() != 0; | |
116 | } | |
117 | ||
118 | template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, scoped_array<T> const & p ) BOOST_NOEXCEPT | |
119 | { | |
120 | return p.get() != 0; | |
121 | } | |
122 | ||
123 | #endif | |
124 | ||
125 | template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) BOOST_NOEXCEPT | |
126 | { | |
127 | a.swap(b); | |
128 | } | |
129 | ||
130 | } // namespace boost | |
131 | ||
132 | #endif // #ifndef BOOST_SMART_PTR_SCOPED_ARRAY_HPP_INCLUDED |