1 #ifndef BOOST_SHARED_ARRAY_HPP_INCLUDED
2 #define BOOST_SHARED_ARRAY_HPP_INCLUDED
7 // (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
8 // Copyright (c) 2001, 2002 Peter Dimov
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)
14 // See http://www.boost.org/libs/smart_ptr/shared_array.htm for documentation.
17 #include <boost/config.hpp> // for broken compiler workarounds
19 #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
20 #include <boost/detail/shared_array_nmt.hpp>
23 #include <memory> // TR1 cyclic inclusion fix
25 #include <boost/assert.hpp>
26 #include <boost/checked_delete.hpp>
28 #include <boost/detail/shared_count.hpp>
29 #include <boost/detail/workaround.hpp>
31 #include <cstddef> // for std::ptrdiff_t
32 #include <algorithm> // for std::swap
33 #include <functional> // for std::less
41 // shared_array extends shared_ptr to arrays.
42 // The array pointed to is deleted when the last shared_array pointing to it
43 // is destroyed or reset.
46 template<class T> class shared_array
50 // Borland 5.5.1 specific workarounds
51 typedef checked_array_deleter<T> deleter;
52 typedef shared_array<T> this_type;
56 typedef T element_type;
58 explicit shared_array(T * p = 0): px(p), pn(p, deleter())
63 // Requirements: D's copy constructor must not throw
65 // shared_array will release p by calling d(p)
68 template<class D> shared_array(T * p, D d): px(p), pn(p, d)
72 // generated copy constructor, assignment, destructor are fine
76 BOOST_ASSERT(p == 0 || p != px);
77 this_type(p).swap(*this);
80 template <class D> void reset(T * p, D d)
82 this_type(p, d).swap(*this);
85 T & operator[] (std::ptrdiff_t i) const // never throws
87 BOOST_ASSERT(px != 0);
92 T * get() const // never throws
97 // implicit conversion to "bool"
99 #if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)
101 operator bool () const
106 #elif defined( _MANAGED )
108 static void unspecified_bool( this_type*** )
112 typedef void (*unspecified_bool_type)( this_type*** );
114 operator unspecified_bool_type() const // never throws
116 return px == 0? 0: unspecified_bool;
120 ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
121 ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) )
123 typedef T * (this_type::*unspecified_bool_type)() const;
125 operator unspecified_bool_type() const // never throws
127 return px == 0? 0: &this_type::get;
132 typedef T * this_type::*unspecified_bool_type;
134 operator unspecified_bool_type() const // never throws
136 return px == 0? 0: &this_type::px;
141 bool operator! () const // never throws
146 bool unique() const // never throws
151 long use_count() const // never throws
153 return pn.use_count();
156 void swap(shared_array<T> & other) // never throws
158 std::swap(px, other.px);
164 T * px; // contained pointer
165 detail::shared_count pn; // reference counter
169 template<class T> inline bool operator==(shared_array<T> const & a, shared_array<T> const & b) // never throws
171 return a.get() == b.get();
174 template<class T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) // never throws
176 return a.get() != b.get();
179 template<class T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) // never throws
181 return std::less<T*>()(a.get(), b.get());
184 template<class T> void swap(shared_array<T> & a, shared_array<T> & b) // never throws
191 #endif // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
193 #endif // #ifndef BOOST_SHARED_ARRAY_HPP_INCLUDED