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