Jeff Thompson | ef2d5a4 | 2013-08-22 19:09:24 -0700 | [diff] [blame^] | 1 | #ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED |
| 2 | #define BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED |
| 3 | |
| 4 | // |
| 5 | // shared_array.hpp |
| 6 | // |
| 7 | // (C) Copyright Greg Colvin and Beman Dawes 1998, 1999. |
| 8 | // Copyright (c) 2001, 2002, 2012 Peter Dimov |
| 9 | // |
| 10 | // Distributed under the Boost Software License, Version 1.0. (See |
| 11 | // accompanying file LICENSE_1_0.txt or copy at |
| 12 | // http://www.boost.org/LICENSE_1_0.txt) |
| 13 | // |
| 14 | // See http://www.boost.org/libs/smart_ptr/shared_array.htm for documentation. |
| 15 | // |
| 16 | |
| 17 | #include <ndnboost/config.hpp> // for broken compiler workarounds |
| 18 | |
| 19 | #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) |
| 20 | #include <ndnboost/smart_ptr/detail/shared_array_nmt.hpp> |
| 21 | #else |
| 22 | |
| 23 | #include <memory> // TR1 cyclic inclusion fix |
| 24 | |
| 25 | #include <ndnboost/assert.hpp> |
| 26 | #include <ndnboost/checked_delete.hpp> |
| 27 | |
| 28 | #include <ndnboost/smart_ptr/shared_ptr.hpp> |
| 29 | #include <ndnboost/smart_ptr/detail/shared_count.hpp> |
| 30 | #include <ndnboost/smart_ptr/detail/sp_nullptr_t.hpp> |
| 31 | #include <ndnboost/detail/workaround.hpp> |
| 32 | |
| 33 | #include <cstddef> // for std::ptrdiff_t |
| 34 | #include <algorithm> // for std::swap |
| 35 | #include <functional> // for std::less |
| 36 | |
| 37 | namespace ndnboost |
| 38 | { |
| 39 | |
| 40 | // |
| 41 | // shared_array |
| 42 | // |
| 43 | // shared_array extends shared_ptr to arrays. |
| 44 | // The array pointed to is deleted when the last shared_array pointing to it |
| 45 | // is destroyed or reset. |
| 46 | // |
| 47 | |
| 48 | template<class T> class shared_array |
| 49 | { |
| 50 | private: |
| 51 | |
| 52 | // Borland 5.5.1 specific workarounds |
| 53 | typedef checked_array_deleter<T> deleter; |
| 54 | typedef shared_array<T> this_type; |
| 55 | |
| 56 | public: |
| 57 | |
| 58 | typedef T element_type; |
| 59 | |
| 60 | shared_array() BOOST_NOEXCEPT : px( 0 ), pn() |
| 61 | { |
| 62 | } |
| 63 | |
| 64 | template<class Y> |
| 65 | explicit shared_array( Y * p ): px( p ), pn( p, checked_array_deleter<Y>() ) |
| 66 | { |
| 67 | ndnboost::detail::sp_assert_convertible< Y[], T[] >(); |
| 68 | } |
| 69 | |
| 70 | // |
| 71 | // Requirements: D's copy constructor must not throw |
| 72 | // |
| 73 | // shared_array will release p by calling d(p) |
| 74 | // |
| 75 | |
| 76 | template<class Y, class D> shared_array( Y * p, D d ): px( p ), pn( p, d ) |
| 77 | { |
| 78 | ndnboost::detail::sp_assert_convertible< Y[], T[] >(); |
| 79 | } |
| 80 | |
| 81 | // As above, but with allocator. A's copy constructor shall not throw. |
| 82 | |
| 83 | template<class Y, class D, class A> shared_array( Y * p, D d, A a ): px( p ), pn( p, d, a ) |
| 84 | { |
| 85 | ndnboost::detail::sp_assert_convertible< Y[], T[] >(); |
| 86 | } |
| 87 | |
| 88 | // generated copy constructor, destructor are fine... |
| 89 | |
| 90 | #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES ) |
| 91 | |
| 92 | // ... except in C++0x, move disables the implicit copy |
| 93 | |
| 94 | shared_array( shared_array const & r ) BOOST_NOEXCEPT : px( r.px ), pn( r.pn ) |
| 95 | { |
| 96 | } |
| 97 | |
| 98 | shared_array( shared_array && r ) BOOST_NOEXCEPT : px( r.px ), pn() |
| 99 | { |
| 100 | pn.swap( r.pn ); |
| 101 | r.px = 0; |
| 102 | } |
| 103 | |
| 104 | #endif |
| 105 | |
| 106 | // conversion |
| 107 | |
| 108 | template<class Y> |
| 109 | #if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) |
| 110 | |
| 111 | shared_array( shared_array<Y> const & r, typename ndnboost::detail::sp_enable_if_convertible< Y[], T[] >::type = ndnboost::detail::sp_empty() ) |
| 112 | |
| 113 | #else |
| 114 | |
| 115 | shared_array( shared_array<Y> const & r ) |
| 116 | |
| 117 | #endif |
| 118 | BOOST_NOEXCEPT : px( r.px ), pn( r.pn ) // never throws |
| 119 | { |
| 120 | ndnboost::detail::sp_assert_convertible< Y[], T[] >(); |
| 121 | } |
| 122 | |
| 123 | // aliasing |
| 124 | |
| 125 | template< class Y > |
| 126 | shared_array( shared_array<Y> const & r, element_type * p ) BOOST_NOEXCEPT : px( p ), pn( r.pn ) |
| 127 | { |
| 128 | } |
| 129 | |
| 130 | // assignment |
| 131 | |
| 132 | shared_array & operator=( shared_array const & r ) BOOST_NOEXCEPT |
| 133 | { |
| 134 | this_type( r ).swap( *this ); |
| 135 | return *this; |
| 136 | } |
| 137 | |
| 138 | #if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1400) |
| 139 | |
| 140 | template<class Y> |
| 141 | shared_array & operator=( shared_array<Y> const & r ) BOOST_NOEXCEPT |
| 142 | { |
| 143 | this_type( r ).swap( *this ); |
| 144 | return *this; |
| 145 | } |
| 146 | |
| 147 | #endif |
| 148 | |
| 149 | #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES ) |
| 150 | |
| 151 | shared_array & operator=( shared_array && r ) BOOST_NOEXCEPT |
| 152 | { |
| 153 | this_type( static_cast< shared_array && >( r ) ).swap( *this ); |
| 154 | return *this; |
| 155 | } |
| 156 | |
| 157 | template<class Y> |
| 158 | shared_array & operator=( shared_array<Y> && r ) BOOST_NOEXCEPT |
| 159 | { |
| 160 | this_type( static_cast< shared_array<Y> && >( r ) ).swap( *this ); |
| 161 | return *this; |
| 162 | } |
| 163 | |
| 164 | #endif |
| 165 | |
| 166 | void reset() BOOST_NOEXCEPT |
| 167 | { |
| 168 | this_type().swap( *this ); |
| 169 | } |
| 170 | |
| 171 | template<class Y> void reset( Y * p ) // Y must be complete |
| 172 | { |
| 173 | BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors |
| 174 | this_type( p ).swap( *this ); |
| 175 | } |
| 176 | |
| 177 | template<class Y, class D> void reset( Y * p, D d ) |
| 178 | { |
| 179 | this_type( p, d ).swap( *this ); |
| 180 | } |
| 181 | |
| 182 | template<class Y, class D, class A> void reset( Y * p, D d, A a ) |
| 183 | { |
| 184 | this_type( p, d, a ).swap( *this ); |
| 185 | } |
| 186 | |
| 187 | template<class Y> void reset( shared_array<Y> const & r, element_type * p ) |
| 188 | { |
| 189 | this_type( r, p ).swap( *this ); |
| 190 | } |
| 191 | |
| 192 | T & operator[] (std::ptrdiff_t i) const // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT) |
| 193 | { |
| 194 | BOOST_ASSERT(px != 0); |
| 195 | BOOST_ASSERT(i >= 0); |
| 196 | return px[i]; |
| 197 | } |
| 198 | |
| 199 | T * get() const BOOST_NOEXCEPT |
| 200 | { |
| 201 | return px; |
| 202 | } |
| 203 | |
| 204 | // implicit conversion to "bool" |
| 205 | #include <ndnboost/smart_ptr/detail/operator_bool.hpp> |
| 206 | |
| 207 | bool unique() const BOOST_NOEXCEPT |
| 208 | { |
| 209 | return pn.unique(); |
| 210 | } |
| 211 | |
| 212 | long use_count() const BOOST_NOEXCEPT |
| 213 | { |
| 214 | return pn.use_count(); |
| 215 | } |
| 216 | |
| 217 | void swap(shared_array<T> & other) BOOST_NOEXCEPT |
| 218 | { |
| 219 | std::swap(px, other.px); |
| 220 | pn.swap(other.pn); |
| 221 | } |
| 222 | |
| 223 | void * _internal_get_deleter( ndnboost::detail::sp_typeinfo const & ti ) const |
| 224 | { |
| 225 | return pn.get_deleter( ti ); |
| 226 | } |
| 227 | |
| 228 | private: |
| 229 | |
| 230 | template<class Y> friend class shared_array; |
| 231 | |
| 232 | T * px; // contained pointer |
| 233 | detail::shared_count pn; // reference counter |
| 234 | |
| 235 | }; // shared_array |
| 236 | |
| 237 | template<class T> inline bool operator==(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT |
| 238 | { |
| 239 | return a.get() == b.get(); |
| 240 | } |
| 241 | |
| 242 | template<class T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT |
| 243 | { |
| 244 | return a.get() != b.get(); |
| 245 | } |
| 246 | |
| 247 | #if !defined( BOOST_NO_CXX11_NULLPTR ) |
| 248 | |
| 249 | template<class T> inline bool operator==( shared_array<T> const & p, ndnboost::detail::sp_nullptr_t ) BOOST_NOEXCEPT |
| 250 | { |
| 251 | return p.get() == 0; |
| 252 | } |
| 253 | |
| 254 | template<class T> inline bool operator==( ndnboost::detail::sp_nullptr_t, shared_array<T> const & p ) BOOST_NOEXCEPT |
| 255 | { |
| 256 | return p.get() == 0; |
| 257 | } |
| 258 | |
| 259 | template<class T> inline bool operator!=( shared_array<T> const & p, ndnboost::detail::sp_nullptr_t ) BOOST_NOEXCEPT |
| 260 | { |
| 261 | return p.get() != 0; |
| 262 | } |
| 263 | |
| 264 | template<class T> inline bool operator!=( ndnboost::detail::sp_nullptr_t, shared_array<T> const & p ) BOOST_NOEXCEPT |
| 265 | { |
| 266 | return p.get() != 0; |
| 267 | } |
| 268 | |
| 269 | #endif |
| 270 | |
| 271 | template<class T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT |
| 272 | { |
| 273 | return std::less<T*>()(a.get(), b.get()); |
| 274 | } |
| 275 | |
| 276 | template<class T> void swap(shared_array<T> & a, shared_array<T> & b) BOOST_NOEXCEPT |
| 277 | { |
| 278 | a.swap(b); |
| 279 | } |
| 280 | |
| 281 | template< class D, class T > D * get_deleter( shared_array<T> const & p ) |
| 282 | { |
| 283 | return static_cast< D * >( p._internal_get_deleter( BOOST_SP_TYPEID(D) ) ); |
| 284 | } |
| 285 | |
| 286 | } // namespace ndnboost |
| 287 | |
| 288 | #endif // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) |
| 289 | |
| 290 | #endif // #ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED |