Chris@16: #ifndef BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED
Chris@16: #define BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED
Chris@16: 
Chris@16: //
Chris@16: //  shared_ptr.hpp
Chris@16: //
Chris@16: //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
Chris@16: //  Copyright (c) 2001-2008 Peter Dimov
Chris@16: //
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See
Chris@16: //  accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: //  See http://www.boost.org/libs/smart_ptr/shared_ptr.htm for documentation.
Chris@16: //
Chris@16: 
Chris@16: #include <boost/config.hpp>   // for broken compiler workarounds
Chris@16: 
Chris@16: // In order to avoid circular dependencies with Boost.TR1
Chris@16: // we make sure that our include of <memory> doesn't try to
Chris@16: // pull in the TR1 headers: that's why we use this header 
Chris@16: // rather than including <memory> directly:
Chris@16: #include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/checked_delete.hpp>
Chris@16: #include <boost/throw_exception.hpp>
Chris@16: #include <boost/smart_ptr/detail/shared_count.hpp>
Chris@16: #include <boost/detail/workaround.hpp>
Chris@16: #include <boost/smart_ptr/detail/sp_convertible.hpp>
Chris@16: #include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
Chris@16: 
Chris@16: #if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
Chris@16: #include <boost/smart_ptr/detail/spinlock_pool.hpp>
Chris@16: #endif
Chris@16: 
Chris@16: #include <algorithm>            // for std::swap
Chris@16: #include <functional>           // for std::less
Chris@16: #include <typeinfo>             // for std::bad_cast
Chris@16: #include <cstddef>              // for std::size_t
Chris@16: 
Chris@16: #if !defined(BOOST_NO_IOSTREAM)
Chris@16: #if !defined(BOOST_NO_IOSFWD)
Chris@16: #include <iosfwd>               // for std::basic_ostream
Chris@16: #else
Chris@16: #include <ostream>
Chris@16: #endif
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: template<class T> class shared_ptr;
Chris@16: template<class T> class weak_ptr;
Chris@16: template<class T> class enable_shared_from_this;
Chris@16: class enable_shared_from_raw;
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16: 
Chris@16: // sp_element, element_type
Chris@16: 
Chris@16: template< class T > struct sp_element
Chris@16: {
Chris@16:     typedef T type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T > struct sp_element< T[] >
Chris@16: {
Chris@16:     typedef T type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
Chris@16: 
Chris@16: template< class T, std::size_t N > struct sp_element< T[N] >
Chris@16: {
Chris@16:     typedef T type;
Chris@16: };
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: // sp_dereference, return type of operator*
Chris@16: 
Chris@16: template< class T > struct sp_dereference
Chris@16: {
Chris@16:     typedef T & type;
Chris@16: };
Chris@16: 
Chris@16: template<> struct sp_dereference< void >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
Chris@16: 
Chris@16: template<> struct sp_dereference< void const >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: template<> struct sp_dereference< void volatile >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: template<> struct sp_dereference< void const volatile >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #endif // !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T > struct sp_dereference< T[] >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
Chris@16: 
Chris@16: template< class T, std::size_t N > struct sp_dereference< T[N] >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: // sp_member_access, return type of operator->
Chris@16: 
Chris@16: template< class T > struct sp_member_access
Chris@16: {
Chris@16:     typedef T * type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T > struct sp_member_access< T[] >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
Chris@16: 
Chris@16: template< class T, std::size_t N > struct sp_member_access< T[N] >
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: // sp_array_access, return type of operator[]
Chris@16: 
Chris@16: template< class T > struct sp_array_access
Chris@16: {
Chris@16:     typedef void type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T > struct sp_array_access< T[] >
Chris@16: {
Chris@16:     typedef T & type;
Chris@16: };
Chris@16: 
Chris@16: #if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
Chris@16: 
Chris@16: template< class T, std::size_t N > struct sp_array_access< T[N] >
Chris@16: {
Chris@16:     typedef T & type;
Chris@16: };
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: // sp_extent, for operator[] index check
Chris@16: 
Chris@16: template< class T > struct sp_extent
Chris@16: {
Chris@16:     enum _vt { value = 0 };
Chris@16: };
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T, std::size_t N > struct sp_extent< T[N] >
Chris@16: {
Chris@16:     enum _vt { value = N };
Chris@16: };
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: // enable_shared_from_this support
Chris@16: 
Chris@16: template< class X, class Y, class T > inline void sp_enable_shared_from_this( boost::shared_ptr<X> const * ppx, Y const * py, boost::enable_shared_from_this< T > const * pe )
Chris@16: {
Chris@16:     if( pe != 0 )
Chris@16:     {
Chris@16:         pe->_internal_accept_owner( ppx, const_cast< Y* >( py ) );
Chris@16:     }
Chris@16: }
Chris@16: 
Chris@16: template< class X, class Y > inline void sp_enable_shared_from_this( boost::shared_ptr<X> * ppx, Y const * py, boost::enable_shared_from_raw const * pe );
Chris@16: 
Chris@16: #ifdef _MANAGED
Chris@16: 
Chris@16: // Avoid C4793, ... causes native code generation
Chris@16: 
Chris@16: struct sp_any_pointer
Chris@16: {
Chris@16:     template<class T> sp_any_pointer( T* ) {}
Chris@16: };
Chris@16: 
Chris@16: inline void sp_enable_shared_from_this( sp_any_pointer, sp_any_pointer, sp_any_pointer )
Chris@16: {
Chris@16: }
Chris@16: 
Chris@16: #else // _MANAGED
Chris@16: 
Chris@16: inline void sp_enable_shared_from_this( ... )
Chris@16: {
Chris@16: }
Chris@16: 
Chris@16: #endif // _MANAGED
Chris@16: 
Chris@16: #if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined( BOOST_NO_AUTO_PTR )
Chris@16: 
Chris@16: // rvalue auto_ptr support based on a technique by Dave Abrahams
Chris@16: 
Chris@16: template< class T, class R > struct sp_enable_if_auto_ptr
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< class T, class R > struct sp_enable_if_auto_ptr< std::auto_ptr< T >, R >
Chris@16: {
Chris@16:     typedef R type;
Chris@16: }; 
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: // sp_assert_convertible
Chris@16: 
Chris@16: template< class Y, class T > inline void sp_assert_convertible()
Chris@16: {
Chris@16: #if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
Chris@16: 
Chris@16:     // static_assert( sp_convertible< Y, T >::value );
Chris@16:     typedef char tmp[ sp_convertible< Y, T >::value? 1: -1 ];
Chris@16:     (void)sizeof( tmp );
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16:     T* p = static_cast< Y* >( 0 );
Chris@16:     (void)p;
Chris@16: 
Chris@16: #endif
Chris@16: }
Chris@16: 
Chris@16: // pointer constructor helper
Chris@16: 
Chris@16: template< class T, class Y > inline void sp_pointer_construct( boost::shared_ptr< T > * ppx, Y * p, boost::detail::shared_count & pn )
Chris@16: {
Chris@16:     boost::detail::shared_count( p ).swap( pn );
Chris@16:     boost::detail::sp_enable_shared_from_this( ppx, p, p );
Chris@16: }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T, class Y > inline void sp_pointer_construct( boost::shared_ptr< T[] > * /*ppx*/, Y * p, boost::detail::shared_count & pn )
Chris@16: {
Chris@16:     sp_assert_convertible< Y[], T[] >();
Chris@16:     boost::detail::shared_count( p, boost::checked_array_deleter< T >() ).swap( pn );
Chris@16: }
Chris@16: 
Chris@16: template< class T, std::size_t N, class Y > inline void sp_pointer_construct( boost::shared_ptr< T[N] > * /*ppx*/, Y * p, boost::detail::shared_count & pn )
Chris@16: {
Chris@16:     sp_assert_convertible< Y[N], T[N] >();
Chris@16:     boost::detail::shared_count( p, boost::checked_array_deleter< T >() ).swap( pn );
Chris@16: }
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: // deleter constructor helper
Chris@16: 
Chris@16: template< class T, class Y > inline void sp_deleter_construct( boost::shared_ptr< T > * ppx, Y * p )
Chris@16: {
Chris@16:     boost::detail::sp_enable_shared_from_this( ppx, p, p );
Chris@16: }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: template< class T, class Y > inline void sp_deleter_construct( boost::shared_ptr< T[] > * /*ppx*/, Y * /*p*/ )
Chris@16: {
Chris@16:     sp_assert_convertible< Y[], T[] >();
Chris@16: }
Chris@16: 
Chris@16: template< class T, std::size_t N, class Y > inline void sp_deleter_construct( boost::shared_ptr< T[N] > * /*ppx*/, Y * /*p*/ )
Chris@16: {
Chris@16:     sp_assert_convertible< Y[N], T[N] >();
Chris@16: }
Chris@16: 
Chris@16: #endif // !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: 
Chris@16: //
Chris@16: //  shared_ptr
Chris@16: //
Chris@16: //  An enhanced relative of scoped_ptr with reference counted copy semantics.
Chris@16: //  The object pointed to is deleted when the last shared_ptr pointing to it
Chris@16: //  is destroyed or reset.
Chris@16: //
Chris@16: 
Chris@16: template<class T> class shared_ptr
Chris@16: {
Chris@16: private:
Chris@16: 
Chris@16:     // Borland 5.5.1 specific workaround
Chris@16:     typedef shared_ptr<T> this_type;
Chris@16: 
Chris@16: public:
Chris@16: 
Chris@16:     typedef typename boost::detail::sp_element< T >::type element_type;
Chris@16: 
Chris@16:     shared_ptr() BOOST_NOEXCEPT : px( 0 ), pn() // never throws in 1.30+
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@16: 
Chris@16:     shared_ptr( boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT : px( 0 ), pn() // never throws
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     explicit shared_ptr( Y * p ): px( p ), pn() // Y must be complete
Chris@16:     {
Chris@16:         boost::detail::sp_pointer_construct( this, p, pn );
Chris@16:     }
Chris@16: 
Chris@16:     //
Chris@16:     // Requirements: D's copy constructor must not throw
Chris@16:     //
Chris@16:     // shared_ptr will release p by calling d(p)
Chris@16:     //
Chris@16: 
Chris@16:     template<class Y, class D> shared_ptr( Y * p, D d ): px( p ), pn( p, d )
Chris@16:     {
Chris@16:         boost::detail::sp_deleter_construct( this, p );
Chris@16:     }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@16: 
Chris@16:     template<class D> shared_ptr( boost::detail::sp_nullptr_t p, D d ): px( p ), pn( p, d )
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     // As above, but with allocator. A's copy constructor shall not throw.
Chris@16: 
Chris@16:     template<class Y, class D, class A> shared_ptr( Y * p, D d, A a ): px( p ), pn( p, d, a )
Chris@16:     {
Chris@16:         boost::detail::sp_deleter_construct( this, p );
Chris@16:     }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@16: 
Chris@16:     template<class D, class A> shared_ptr( boost::detail::sp_nullptr_t p, D d, A a ): px( p ), pn( p, d, a )
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: //  generated copy constructor, destructor are fine...
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@16: // ... except in C++0x, move disables the implicit copy
Chris@16: 
Chris@16:     shared_ptr( shared_ptr const & r ) BOOST_NOEXCEPT : px( r.px ), pn( r.pn )
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     explicit shared_ptr( weak_ptr<Y> const & r ): pn( r.pn ) // may throw
Chris@16:     {
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16: 
Chris@16:         // it is now safe to copy r.px, as pn(r.pn) did not throw
Chris@16:         px = r.px;
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     shared_ptr( weak_ptr<Y> const & r, boost::detail::sp_nothrow_tag )
Chris@16:     BOOST_NOEXCEPT : px( 0 ), pn( r.pn, boost::detail::sp_nothrow_tag() )
Chris@16:     {
Chris@16:         if( !pn.empty() )
Chris@16:         {
Chris@16:             px = r.px;
Chris@16:         }
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y>
Chris@16: #if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
Chris@16: 
Chris@16:     shared_ptr( shared_ptr<Y> const & r, typename boost::detail::sp_enable_if_convertible<Y,T>::type = boost::detail::sp_empty() )
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16:     shared_ptr( shared_ptr<Y> const & r )
Chris@16: 
Chris@16: #endif
Chris@16:     BOOST_NOEXCEPT : px( r.px ), pn( r.pn )
Chris@16:     {
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16:     }
Chris@16: 
Chris@16:     // aliasing
Chris@16:     template< class Y >
Chris@16:     shared_ptr( shared_ptr<Y> const & r, element_type * p ) BOOST_NOEXCEPT : px( p ), pn( r.pn )
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16: #ifndef BOOST_NO_AUTO_PTR
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     explicit shared_ptr( std::auto_ptr<Y> & r ): px(r.get()), pn()
Chris@16:     {
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16: 
Chris@16:         Y * tmp = r.get();
Chris@16:         pn = boost::detail::shared_count( r );
Chris@16: 
Chris@16:         boost::detail::sp_deleter_construct( this, tmp );
Chris@16:     }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     shared_ptr( std::auto_ptr<Y> && r ): px(r.get()), pn()
Chris@16:     {
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16: 
Chris@16:         Y * tmp = r.get();
Chris@16:         pn = boost::detail::shared_count( r );
Chris@16: 
Chris@16:         boost::detail::sp_deleter_construct( this, tmp );
Chris@16:     }
Chris@16: 
Chris@16: #elif !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16:     template<class Ap>
Chris@16:     explicit shared_ptr( Ap r, typename boost::detail::sp_enable_if_auto_ptr<Ap, int>::type = 0 ): px( r.get() ), pn()
Chris@16:     {
Chris@16:         typedef typename Ap::element_type Y;
Chris@16: 
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16: 
Chris@16:         Y * tmp = r.get();
Chris@16:         pn = boost::detail::shared_count( r );
Chris@16: 
Chris@16:         boost::detail::sp_deleter_construct( this, tmp );
Chris@16:     }
Chris@16: 
Chris@16: #endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
Chris@16: 
Chris@16: #endif // BOOST_NO_AUTO_PTR
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_SMART_PTR ) && !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@16:     template< class Y, class D >
Chris@16:     shared_ptr( std::unique_ptr< Y, D > && r ): px( r.get() ), pn()
Chris@16:     {
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16: 
Chris@16:         typename std::unique_ptr< Y, D >::pointer tmp = r.get();
Chris@16:         pn = boost::detail::shared_count( r );
Chris@16: 
Chris@16:         boost::detail::sp_deleter_construct( this, tmp );
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     // assignment
Chris@16: 
Chris@16:     shared_ptr & operator=( shared_ptr const & r ) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         this_type(r).swap(*this);
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1400)
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     shared_ptr & operator=(shared_ptr<Y> const & r) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         this_type(r).swap(*this);
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #ifndef BOOST_NO_AUTO_PTR
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     shared_ptr & operator=( std::auto_ptr<Y> & r )
Chris@16:     {
Chris@16:         this_type( r ).swap( *this );
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     shared_ptr & operator=( std::auto_ptr<Y> && r )
Chris@16:     {
Chris@16:         this_type( static_cast< std::auto_ptr<Y> && >( r ) ).swap( *this );
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #elif !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
Chris@16: 
Chris@16:     template<class Ap>
Chris@16:     typename boost::detail::sp_enable_if_auto_ptr< Ap, shared_ptr & >::type operator=( Ap r )
Chris@16:     {
Chris@16:         this_type( r ).swap( *this );
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
Chris@16: 
Chris@16: #endif // BOOST_NO_AUTO_PTR
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_SMART_PTR ) && !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@16:     template<class Y, class D>
Chris@16:     shared_ptr & operator=( std::unique_ptr<Y, D> && r )
Chris@16:     {
Chris@16:         this_type( static_cast< std::unique_ptr<Y, D> && >( r ) ).swap(*this);
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: // Move support
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
Chris@16: 
Chris@16:     shared_ptr( shared_ptr && r ) BOOST_NOEXCEPT : px( r.px ), pn()
Chris@16:     {
Chris@16:         pn.swap( r.pn );
Chris@16:         r.px = 0;
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y>
Chris@16: #if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
Chris@16: 
Chris@16:     shared_ptr( shared_ptr<Y> && r, typename boost::detail::sp_enable_if_convertible<Y,T>::type = boost::detail::sp_empty() )
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16:     shared_ptr( shared_ptr<Y> && r )
Chris@16: 
Chris@16: #endif
Chris@16:     BOOST_NOEXCEPT : px( r.px ), pn()
Chris@16:     {
Chris@16:         boost::detail::sp_assert_convertible< Y, T >();
Chris@16: 
Chris@16:         pn.swap( r.pn );
Chris@16:         r.px = 0;
Chris@16:     }
Chris@16: 
Chris@16:     shared_ptr & operator=( shared_ptr && r ) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         this_type( static_cast< shared_ptr && >( r ) ).swap( *this );
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y>
Chris@16:     shared_ptr & operator=( shared_ptr<Y> && r ) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         this_type( static_cast< shared_ptr<Y> && >( r ) ).swap( *this );
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@16: 
Chris@16:     shared_ptr & operator=( boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT // never throws
Chris@16:     {
Chris@16:         this_type().swap(*this);
Chris@16:         return *this;
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     void reset() BOOST_NOEXCEPT // never throws in 1.30+
Chris@16:     {
Chris@16:         this_type().swap(*this);
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y> void reset( Y * p ) // Y must be complete
Chris@16:     {
Chris@16:         BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
Chris@16:         this_type( p ).swap( *this );
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y, class D> void reset( Y * p, D d )
Chris@16:     {
Chris@16:         this_type( p, d ).swap( *this );
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y, class D, class A> void reset( Y * p, D d, A a )
Chris@16:     {
Chris@16:         this_type( p, d, a ).swap( *this );
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y> void reset( shared_ptr<Y> const & r, element_type * p )
Chris@16:     {
Chris@16:         this_type( r, p ).swap( *this );
Chris@16:     }
Chris@16:     
Chris@16:     // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT)
Chris@16:     typename boost::detail::sp_dereference< T >::type operator* () const
Chris@16:     {
Chris@16:         BOOST_ASSERT( px != 0 );
Chris@16:         return *px;
Chris@16:     }
Chris@16:     
Chris@16:     // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT)
Chris@16:     typename boost::detail::sp_member_access< T >::type operator-> () const 
Chris@16:     {
Chris@16:         BOOST_ASSERT( px != 0 );
Chris@16:         return px;
Chris@16:     }
Chris@16:     
Chris@16:     // never throws (but has a BOOST_ASSERT in it, so not marked with BOOST_NOEXCEPT)
Chris@16:     typename boost::detail::sp_array_access< T >::type operator[] ( std::ptrdiff_t i ) const
Chris@16:     {
Chris@16:         BOOST_ASSERT( px != 0 );
Chris@16:         BOOST_ASSERT( i >= 0 && ( i < boost::detail::sp_extent< T >::value || boost::detail::sp_extent< T >::value == 0 ) );
Chris@16: 
Chris@101:         return static_cast< typename boost::detail::sp_array_access< T >::type >( px[ i ] );
Chris@16:     }
Chris@16: 
Chris@16:     element_type * get() const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return px;
Chris@16:     }
Chris@16: 
Chris@16: // implicit conversion to "bool"
Chris@16: #include <boost/smart_ptr/detail/operator_bool.hpp>
Chris@16: 
Chris@16:     bool unique() const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return pn.unique();
Chris@16:     }
Chris@16: 
Chris@16:     long use_count() const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return pn.use_count();
Chris@16:     }
Chris@16: 
Chris@16:     void swap( shared_ptr & other ) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         std::swap(px, other.px);
Chris@16:         pn.swap(other.pn);
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y> bool owner_before( shared_ptr<Y> const & rhs ) const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return pn < rhs.pn;
Chris@16:     }
Chris@16: 
Chris@16:     template<class Y> bool owner_before( weak_ptr<Y> const & rhs ) const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return pn < rhs.pn;
Chris@16:     }
Chris@16: 
Chris@16:     void * _internal_get_deleter( boost::detail::sp_typeinfo const & ti ) const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return pn.get_deleter( ti );
Chris@16:     }
Chris@16: 
Chris@16:     void * _internal_get_untyped_deleter() const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return pn.get_untyped_deleter();
Chris@16:     }
Chris@16: 
Chris@16:     bool _internal_equiv( shared_ptr const & r ) const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return px == r.px && pn == r.pn;
Chris@16:     }
Chris@16: 
Chris@16: // Tasteless as this may seem, making all members public allows member templates
Chris@16: // to work in the absence of member template friends. (Matthew Langston)
Chris@16: 
Chris@16: #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
Chris@16: 
Chris@16: private:
Chris@16: 
Chris@16:     template<class Y> friend class shared_ptr;
Chris@16:     template<class Y> friend class weak_ptr;
Chris@16: 
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     element_type * px;                 // contained pointer
Chris@16:     boost::detail::shared_count pn;    // reference counter
Chris@16: 
Chris@16: };  // shared_ptr
Chris@16: 
Chris@16: template<class T, class U> inline bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return a.get() == b.get();
Chris@16: }
Chris@16: 
Chris@16: template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return a.get() != b.get();
Chris@16: }
Chris@16: 
Chris@16: #if __GNUC__ == 2 && __GNUC_MINOR__ <= 96
Chris@16: 
Chris@16: // Resolve the ambiguity between our op!= and the one in rel_ops
Chris@16: 
Chris@16: template<class T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return a.get() != b.get();
Chris@16: }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@16: 
Chris@16: template<class T> inline bool operator==( shared_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() == 0;
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline bool operator==( boost::detail::sp_nullptr_t, shared_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() == 0;
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline bool operator!=( shared_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() != 0;
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, shared_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() != 0;
Chris@16: }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return a.owner_before( b );
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     a.swap(b);
Chris@16: }
Chris@16: 
Chris@16: template<class T, class U> shared_ptr<T> static_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     (void) static_cast< T* >( static_cast< U* >( 0 ) );
Chris@16: 
Chris@16:     typedef typename shared_ptr<T>::element_type E;
Chris@16: 
Chris@16:     E * p = static_cast< E* >( r.get() );
Chris@16:     return shared_ptr<T>( r, p );
Chris@16: }
Chris@16: 
Chris@16: template<class T, class U> shared_ptr<T> const_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     (void) const_cast< T* >( static_cast< U* >( 0 ) );
Chris@16: 
Chris@16:     typedef typename shared_ptr<T>::element_type E;
Chris@16: 
Chris@16:     E * p = const_cast< E* >( r.get() );
Chris@16:     return shared_ptr<T>( r, p );
Chris@16: }
Chris@16: 
Chris@16: template<class T, class U> shared_ptr<T> dynamic_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     (void) dynamic_cast< T* >( static_cast< U* >( 0 ) );
Chris@16: 
Chris@16:     typedef typename shared_ptr<T>::element_type E;
Chris@16: 
Chris@16:     E * p = dynamic_cast< E* >( r.get() );
Chris@16:     return p? shared_ptr<T>( r, p ): shared_ptr<T>();
Chris@16: }
Chris@16: 
Chris@16: template<class T, class U> shared_ptr<T> reinterpret_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     (void) reinterpret_cast< T* >( static_cast< U* >( 0 ) );
Chris@16: 
Chris@16:     typedef typename shared_ptr<T>::element_type E;
Chris@16: 
Chris@16:     E * p = reinterpret_cast< E* >( r.get() );
Chris@16:     return shared_ptr<T>( r, p );
Chris@16: }
Chris@16: 
Chris@16: // get_pointer() enables boost::mem_fn to recognize shared_ptr
Chris@16: 
Chris@16: template<class T> inline typename shared_ptr<T>::element_type * get_pointer(shared_ptr<T> const & p) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get();
Chris@16: }
Chris@16: 
Chris@16: // operator<<
Chris@16: 
Chris@16: #if !defined(BOOST_NO_IOSTREAM)
Chris@16: 
Chris@16: #if defined(BOOST_NO_TEMPLATED_IOSTREAMS) || ( defined(__GNUC__) &&  (__GNUC__ < 3) )
Chris@16: 
Chris@16: template<class Y> std::ostream & operator<< (std::ostream & os, shared_ptr<Y> const & p)
Chris@16: {
Chris@16:     os << p.get();
Chris@16:     return os;
Chris@16: }
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: // in STLport's no-iostreams mode no iostream symbols can be used
Chris@16: #ifndef _STLP_NO_IOSTREAMS
Chris@16: 
Chris@16: # if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)
Chris@16: // MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL
Chris@16: using std::basic_ostream;
Chris@16: template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, shared_ptr<Y> const & p)
Chris@16: # else
Chris@16: template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, shared_ptr<Y> const & p)
Chris@16: # endif
Chris@16: {
Chris@16:     os << p.get();
Chris@16:     return os;
Chris@16: }
Chris@16: 
Chris@16: #endif // _STLP_NO_IOSTREAMS
Chris@16: 
Chris@16: #endif // __GNUC__ < 3
Chris@16: 
Chris@16: #endif // !defined(BOOST_NO_IOSTREAM)
Chris@16: 
Chris@16: // get_deleter
Chris@16: 
Chris@16: namespace detail
Chris@16: {
Chris@16: 
Chris@16: #if ( defined(__GNUC__) && BOOST_WORKAROUND(__GNUC__, < 3) ) || \
Chris@16:     ( defined(__EDG_VERSION__) && BOOST_WORKAROUND(__EDG_VERSION__, <= 238) ) || \
Chris@16:     ( defined(__HP_aCC) && BOOST_WORKAROUND(__HP_aCC, <= 33500) )
Chris@16: 
Chris@16: // g++ 2.9x doesn't allow static_cast<X const *>(void *)
Chris@16: // apparently EDG 2.38 and HP aCC A.03.35 also don't accept it
Chris@16: 
Chris@16: template<class D, class T> D * basic_get_deleter(shared_ptr<T> const & p)
Chris@16: {
Chris@16:     void const * q = p._internal_get_deleter(BOOST_SP_TYPEID(D));
Chris@16:     return const_cast<D *>(static_cast<D const *>(q));
Chris@16: }
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: template<class D, class T> D * basic_get_deleter( shared_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return static_cast<D *>( p._internal_get_deleter(BOOST_SP_TYPEID(D)) );
Chris@16: }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: class esft2_deleter_wrapper
Chris@16: {
Chris@16: private:
Chris@16: 
Chris@101:     shared_ptr<void const volatile> deleter_;
Chris@16: 
Chris@16: public:
Chris@16: 
Chris@16:     esft2_deleter_wrapper()
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     template< class T > void set_deleter( shared_ptr<T> const & deleter )
Chris@16:     {
Chris@16:         deleter_ = deleter;
Chris@16:     }
Chris@16: 
Chris@16:     template<typename D> D* get_deleter() const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return boost::detail::basic_get_deleter<D>( deleter_ );
Chris@16:     }
Chris@16: 
Chris@16:     template< class T> void operator()( T* )
Chris@16:     {
Chris@16:         BOOST_ASSERT( deleter_.use_count() <= 1 );
Chris@16:         deleter_.reset();
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: template<class D, class T> D * get_deleter( shared_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     D *del = boost::detail::basic_get_deleter<D>(p);
Chris@16: 
Chris@16:     if(del == 0)
Chris@16:     {
Chris@16:         boost::detail::esft2_deleter_wrapper *del_wrapper = boost::detail::basic_get_deleter<boost::detail::esft2_deleter_wrapper>(p);
Chris@16: // The following get_deleter method call is fully qualified because
Chris@16: // older versions of gcc (2.95, 3.2.3) fail to compile it when written del_wrapper->get_deleter<D>()
Chris@16:         if(del_wrapper) del = del_wrapper->::boost::detail::esft2_deleter_wrapper::get_deleter<D>();
Chris@16:     }
Chris@16: 
Chris@16:     return del;
Chris@16: }
Chris@16: 
Chris@16: // atomic access
Chris@16: 
Chris@16: #if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
Chris@16: 
Chris@16: template<class T> inline bool atomic_is_lock_free( shared_ptr<T> const * /*p*/ ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return false;
Chris@16: }
Chris@16: 
Chris@16: template<class T> shared_ptr<T> atomic_load( shared_ptr<T> const * p )
Chris@16: {
Chris@16:     boost::detail::spinlock_pool<2>::scoped_lock lock( p );
Chris@16:     return *p;
Chris@16: }
Chris@16: 
Chris@101: template<class T> inline shared_ptr<T> atomic_load_explicit( shared_ptr<T> const * p, /*memory_order mo*/ int )
Chris@16: {
Chris@16:     return atomic_load( p );
Chris@16: }
Chris@16: 
Chris@16: template<class T> void atomic_store( shared_ptr<T> * p, shared_ptr<T> r )
Chris@16: {
Chris@16:     boost::detail::spinlock_pool<2>::scoped_lock lock( p );
Chris@16:     p->swap( r );
Chris@16: }
Chris@16: 
Chris@101: template<class T> inline void atomic_store_explicit( shared_ptr<T> * p, shared_ptr<T> r, /*memory_order mo*/ int )
Chris@16: {
Chris@16:     atomic_store( p, r ); // std::move( r )
Chris@16: }
Chris@16: 
Chris@16: template<class T> shared_ptr<T> atomic_exchange( shared_ptr<T> * p, shared_ptr<T> r )
Chris@16: {
Chris@16:     boost::detail::spinlock & sp = boost::detail::spinlock_pool<2>::spinlock_for( p );
Chris@16: 
Chris@16:     sp.lock();
Chris@16:     p->swap( r );
Chris@16:     sp.unlock();
Chris@16: 
Chris@16:     return r; // return std::move( r )
Chris@16: }
Chris@16: 
Chris@101: template<class T> shared_ptr<T> atomic_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> r, /*memory_order mo*/ int )
Chris@16: {
Chris@16:     return atomic_exchange( p, r ); // std::move( r )
Chris@16: }
Chris@16: 
Chris@16: template<class T> bool atomic_compare_exchange( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w )
Chris@16: {
Chris@16:     boost::detail::spinlock & sp = boost::detail::spinlock_pool<2>::spinlock_for( p );
Chris@16: 
Chris@16:     sp.lock();
Chris@16: 
Chris@16:     if( p->_internal_equiv( *v ) )
Chris@16:     {
Chris@16:         p->swap( w );
Chris@16: 
Chris@16:         sp.unlock();
Chris@16: 
Chris@16:         return true;
Chris@16:     }
Chris@16:     else
Chris@16:     {
Chris@16:         shared_ptr<T> tmp( *p );
Chris@16: 
Chris@16:         sp.unlock();
Chris@16: 
Chris@16:         tmp.swap( *v );
Chris@16:         return false;
Chris@16:     }
Chris@16: }
Chris@16: 
Chris@101: template<class T> inline bool atomic_compare_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w, /*memory_order success*/ int, /*memory_order failure*/ int )
Chris@16: {
Chris@16:     return atomic_compare_exchange( p, v, w ); // std::move( w )
Chris@16: }
Chris@16: 
Chris@16: #endif // !defined(BOOST_SP_NO_ATOMIC_ACCESS)
Chris@16: 
Chris@16: // hash_value
Chris@16: 
Chris@16: template< class T > struct hash;
Chris@16: 
Chris@16: template< class T > std::size_t hash_value( boost::shared_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return boost::hash< T* >()( p.get() );
Chris@16: }
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif  // #ifndef BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED