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+#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, 2012 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
+
+#include <memory> // TR1 cyclic inclusion fix
+
+#include <boost/assert.hpp>
+#include <boost/checked_delete.hpp>
+
+#include <boost/smart_ptr/shared_ptr.hpp>
+#include <boost/smart_ptr/detail/shared_count.hpp>
+#include <boost/smart_ptr/detail/sp_nullptr_t.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;
+
+ shared_array() BOOST_NOEXCEPT : px( 0 ), pn()
+ {
+ }
+
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+
+ shared_array( boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT : px( 0 ), pn()
+ {
+ }
+
+#endif
+
+ template<class Y>
+ explicit shared_array( Y * p ): px( p ), pn( p, checked_array_deleter<Y>() )
+ {
+ boost::detail::sp_assert_convertible< Y[], T[] >();
+ }
+
+ //
+ // Requirements: D's copy constructor must not throw
+ //
+ // shared_array will release p by calling d(p)
+ //
+
+ template<class Y, class D> shared_array( Y * p, D d ): px( p ), pn( p, d )
+ {
+ boost::detail::sp_assert_convertible< Y[], T[] >();
+ }
+
+ // As above, but with allocator. A's copy constructor shall not throw.
+
+ template<class Y, class D, class A> shared_array( Y * p, D d, A a ): px( p ), pn( p, d, a )
+ {
+ boost::detail::sp_assert_convertible< Y[], T[] >();
+ }
+
+// generated copy constructor, destructor are fine...
+
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
+
+// ... except in C++0x, move disables the implicit copy
+
+ shared_array( shared_array const & r ) BOOST_NOEXCEPT : px( r.px ), pn( r.pn )
+ {
+ }
+
+ shared_array( shared_array && r ) BOOST_NOEXCEPT : px( r.px ), pn()
+ {
+ pn.swap( r.pn );
+ r.px = 0;
+ }
+
+#endif
+
+ // conversion
+
+ template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+ shared_array( shared_array<Y> const & r, typename boost::detail::sp_enable_if_convertible< Y[], T[] >::type = boost::detail::sp_empty() )
+
+#else
+
+ shared_array( shared_array<Y> const & r )
+
+#endif
+ BOOST_NOEXCEPT : px( r.px ), pn( r.pn ) // never throws
+ {
+ boost::detail::sp_assert_convertible< Y[], T[] >();
+ }
+
+ // aliasing
+
+ template< class Y >
+ shared_array( shared_array<Y> const & r, element_type * p ) BOOST_NOEXCEPT : px( p ), pn( r.pn )
+ {
+ }
+
+ // assignment
+
+ shared_array & operator=( shared_array const & r ) BOOST_NOEXCEPT
+ {
+ this_type( r ).swap( *this );
+ return *this;
+ }
+
+#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1400)
+
+ template<class Y>
+ shared_array & operator=( shared_array<Y> const & r ) BOOST_NOEXCEPT
+ {
+ this_type( r ).swap( *this );
+ return *this;
+ }
+
+#endif
+
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
+
+ shared_array & operator=( shared_array && r ) BOOST_NOEXCEPT
+ {
+ this_type( static_cast< shared_array && >( r ) ).swap( *this );
+ return *this;
+ }
+
+ template<class Y>
+ shared_array & operator=( shared_array<Y> && r ) BOOST_NOEXCEPT
+ {
+ this_type( static_cast< shared_array<Y> && >( r ) ).swap( *this );
+ return *this;
+ }
+
+#endif
+
+ void reset() BOOST_NOEXCEPT
+ {
+ this_type().swap( *this );
+ }
+
+ template<class Y> void reset( Y * p ) // Y must be complete
+ {
+ BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
+ this_type( p ).swap( *this );
+ }
+
+ template<class Y, class D> void reset( Y * p, D d )
+ {
+ this_type( p, d ).swap( *this );
+ }
+
+ template<class Y, class D, class A> void reset( Y * p, D d, A a )
+ {
+ this_type( p, d, a ).swap( *this );
+ }
+
+ template<class Y> void reset( shared_array<Y> const & r, element_type * p )
+ {
+ this_type( r, p ).swap( *this );
+ }
+
+ T & operator[] (std::ptrdiff_t i) const // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT)
+ {
+ BOOST_ASSERT(px != 0);
+ BOOST_ASSERT(i >= 0);
+ return px[i];
+ }
+
+ T * get() const BOOST_NOEXCEPT
+ {
+ return px;
+ }
+
+// implicit conversion to "bool"
+#include <boost/smart_ptr/detail/operator_bool.hpp>
+
+ bool unique() const BOOST_NOEXCEPT
+ {
+ return pn.unique();
+ }
+
+ long use_count() const BOOST_NOEXCEPT
+ {
+ return pn.use_count();
+ }
+
+ void swap(shared_array<T> & other) BOOST_NOEXCEPT
+ {
+ std::swap(px, other.px);
+ pn.swap(other.pn);
+ }
+
+ void * _internal_get_deleter( boost::detail::sp_typeinfo const & ti ) const
+ {
+ return pn.get_deleter( ti );
+ }
+
+private:
+
+ template<class Y> friend class shared_array;
+
+ 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) BOOST_NOEXCEPT
+{
+ return a.get() == b.get();
+}
+
+template<class T> inline bool operator!=(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT
+{
+ return a.get() != b.get();
+}
+
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+
+template<class T> inline bool operator==( shared_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
+{
+ return p.get() == 0;
+}
+
+template<class T> inline bool operator==( boost::detail::sp_nullptr_t, shared_array<T> const & p ) BOOST_NOEXCEPT
+{
+ return p.get() == 0;
+}
+
+template<class T> inline bool operator!=( shared_array<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
+{
+ return p.get() != 0;
+}
+
+template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, shared_array<T> const & p ) BOOST_NOEXCEPT
+{
+ return p.get() != 0;
+}
+
+#endif
+
+template<class T> inline bool operator<(shared_array<T> const & a, shared_array<T> const & b) BOOST_NOEXCEPT
+{
+ return std::less<T*>()(a.get(), b.get());
+}
+
+template<class T> void swap(shared_array<T> & a, shared_array<T> & b) BOOST_NOEXCEPT
+{
+ a.swap(b);
+}
+
+template< class D, class T > D * get_deleter( shared_array<T> const & p )
+{
+ return static_cast< D * >( p._internal_get_deleter( BOOST_SP_TYPEID(D) ) );
+}
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_SHARED_ARRAY_HPP_INCLUDED