#ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED | |
#define BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED | |
// | |
// shared_array.hpp | |
// | |
// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999. | |
// Copyright (c) 2001, 2002 Peter Dimov | |
// | |
// Distributed under the Boost Software License, Version 1.0. (See | |
// accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
// | |
// See http://www.boost.org/libs/smart_ptr/shared_array.htm for documentation. | |
// | |
#include <boost/config.hpp> // for broken compiler workarounds | |
#if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) | |
#include <boost/smart_ptr/detail/shared_array_nmt.hpp> | |
#else | |
#include <memory> // TR1 cyclic inclusion fix | |
#include <boost/assert.hpp> | |
#include <boost/checked_delete.hpp> | |
#include <boost/smart_ptr/detail/shared_count.hpp> | |
#include <boost/detail/workaround.hpp> | |
#include <cstddef> // for std::ptrdiff_t | |
#include <algorithm> // for std::swap | |
#include <functional> // for std::less | |
namespace boost | |
{ | |
// | |
// shared_array | |
// | |
// shared_array extends shared_ptr to arrays. | |
// The array pointed to is deleted when the last shared_array pointing to it | |
// is destroyed or reset. | |
// | |
template<class T> class shared_array | |
{ | |
private: | |
// Borland 5.5.1 specific workarounds | |
typedef checked_array_deleter<T> deleter; | |
typedef shared_array<T> this_type; | |
public: | |
typedef T element_type; | |
explicit shared_array(T * p = 0): px(p), pn(p, deleter()) | |
{ | |
} | |
// | |
// Requirements: D's copy constructor must not throw | |
// | |
// shared_array will release p by calling d(p) | |
// | |
template<class D> shared_array(T * p, D d): px(p), pn(p, d) | |
{ | |
} | |
// generated copy constructor, assignment, destructor are fine | |
void reset(T * p = 0) | |
{ | |
BOOST_ASSERT(p == 0 || p != px); | |
this_type(p).swap(*this); | |
} | |
template <class D> void reset(T * p, D d) | |
{ | |
this_type(p, d).swap(*this); | |
} | |
T & operator[] (std::ptrdiff_t i) const // never throws | |
{ | |
BOOST_ASSERT(px != 0); | |
BOOST_ASSERT(i >= 0); | |
return px[i]; | |
} | |
T * get() const // never throws | |
{ | |
return px; | |
} | |
// implicit conversion to "bool" | |
#include <boost/smart_ptr/detail/operator_bool.hpp> | |
bool unique() const // never throws | |
{ | |
return pn.unique(); | |
} | |
long use_count() const // never throws | |
{ | |
return pn.use_count(); | |
} | |
void swap(shared_array<T> & other) // never throws | |
{ | |
std::swap(px, other.px); | |
pn.swap(other.pn); | |
} | |
private: | |
T * px; // contained pointer | |
detail::shared_count pn; // reference counter | |
}; // shared_array | |
template<class T> inline bool operator==(shared_array<T> const & a, shared_array<T> const & b) // never throws | |
{ | |
return a.get() == b.get(); | |
} | |
template<class T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) // never throws | |
{ | |
return a.get() != b.get(); | |
} | |
template<class T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) // never throws | |
{ | |
return std::less<T*>()(a.get(), b.get()); | |
} | |
template<class T> void swap(shared_array<T> & a, shared_array<T> & b) // never throws | |
{ | |
a.swap(b); | |
} | |
} // namespace boost | |
#endif // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) | |
#endif // #ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED |