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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/ 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>
- #include <boost/smart_ptr/detail/sp_disable_deprecated.hpp>
- #include <boost/smart_ptr/detail/sp_noexcept.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
- #endif
- #if defined( BOOST_SP_DISABLE_DEPRECATED )
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
- #endif
- namespace 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 movelib
- {
- template< class T, class D > class unique_ptr;
- } // namespace movelib
- namespace detail
- {
- // sp_element, element_type
- template< 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 check
- template< 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 support
- 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 )
- {
- 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 generation
- struct 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 // _MANAGED
- inline 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 Abrahams
- template< 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_convertible
- template< class Y, class T > inline void sp_assert_convertible() BOOST_SP_NOEXCEPT
- {
- #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 helper
- template< 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 helper
- template< 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 )
- struct sp_internal_constructor_tag
- {
- };
- } // 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;
- BOOST_CONSTEXPR shared_ptr() BOOST_SP_NOEXCEPT : px( 0 ), pn()
- {
- }
- #if !defined( BOOST_NO_CXX11_NULLPTR )
- BOOST_CONSTEXPR shared_ptr( boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT : px( 0 ), pn()
- {
- }
- #endif
- BOOST_CONSTEXPR shared_ptr( boost::detail::sp_internal_constructor_tag, element_type * px_, boost::detail::shared_count const & pn_ ) BOOST_SP_NOEXCEPT : px( px_ ), pn( pn_ )
- {
- }
- #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- BOOST_CONSTEXPR shared_ptr( boost::detail::sp_internal_constructor_tag, element_type * px_, boost::detail::shared_count && pn_ ) BOOST_SP_NOEXCEPT : px( px_ ), pn( std::move( pn_ ) )
- {
- }
- #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_SP_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_SP_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_SP_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_SP_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();
- if( tmp != 0 )
- {
- pn = boost::detail::shared_count( r );
- boost::detail::sp_deleter_construct( this, tmp );
- }
- }
- #endif
- template< class Y, class D >
- shared_ptr( boost::movelib::unique_ptr< Y, D > r ): px( r.get() ), pn()
- {
- boost::detail::sp_assert_convertible< Y, T >();
- typename boost::movelib::unique_ptr< Y, D >::pointer tmp = r.get();
- if( tmp != 0 )
- {
- pn = boost::detail::shared_count( r );
- boost::detail::sp_deleter_construct( this, tmp );
- }
- }
- // assignment
- shared_ptr & operator=( shared_ptr const & r ) BOOST_SP_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_SP_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
- template<class Y, class D>
- shared_ptr & operator=( boost::movelib::unique_ptr<Y, D> r )
- {
- // this_type( static_cast< unique_ptr<Y, D> && >( r ) ).swap( *this );
- boost::detail::sp_assert_convertible< Y, T >();
- typename boost::movelib::unique_ptr< Y, D >::pointer p = r.get();
- shared_ptr tmp;
- if( p != 0 )
- {
- tmp.px = p;
- tmp.pn = boost::detail::shared_count( r );
- boost::detail::sp_deleter_construct( &tmp, p );
- }
- tmp.swap( *this );
- return *this;
- }
- // Move support
- #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- shared_ptr( shared_ptr && r ) BOOST_SP_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_SP_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_SP_NOEXCEPT
- {
- this_type( static_cast< shared_ptr && >( r ) ).swap( *this );
- return *this;
- }
- template<class Y>
- shared_ptr & operator=( shared_ptr<Y> && r ) BOOST_SP_NOEXCEPT
- {
- this_type( static_cast< shared_ptr<Y> && >( r ) ).swap( *this );
- return *this;
- }
- // aliasing move
- template<class Y>
- shared_ptr( shared_ptr<Y> && r, element_type * p ) BOOST_SP_NOEXCEPT : px( p ), pn()
- {
- pn.swap( r.pn );
- r.px = 0;
- }
- #endif
- #if !defined( BOOST_NO_CXX11_NULLPTR )
- shared_ptr & operator=( boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT
- {
- this_type().swap(*this);
- return *this;
- }
- #endif
- void reset() BOOST_SP_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_ptr<Y> const & r, element_type * p ) BOOST_SP_NOEXCEPT
- {
- this_type( r, p ).swap( *this );
- }
- #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- template<class Y> void reset( shared_ptr<Y> && r, element_type * p ) BOOST_SP_NOEXCEPT
- {
- this_type( static_cast< shared_ptr<Y> && >( r ), p ).swap( *this );
- }
- #endif
- typename boost::detail::sp_dereference< T >::type operator* () const BOOST_SP_NOEXCEPT_WITH_ASSERT
- {
- BOOST_ASSERT( px != 0 );
- return *px;
- }
-
- typename boost::detail::sp_member_access< T >::type operator-> () const BOOST_SP_NOEXCEPT_WITH_ASSERT
- {
- BOOST_ASSERT( px != 0 );
- return px;
- }
-
- typename boost::detail::sp_array_access< T >::type operator[] ( std::ptrdiff_t i ) const BOOST_SP_NOEXCEPT_WITH_ASSERT
- {
- 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_SP_NOEXCEPT
- {
- return px;
- }
- // implicit conversion to "bool"
- #include <boost/smart_ptr/detail/operator_bool.hpp>
- bool unique() const BOOST_SP_NOEXCEPT
- {
- return pn.unique();
- }
- long use_count() const BOOST_SP_NOEXCEPT
- {
- return pn.use_count();
- }
- void swap( shared_ptr & other ) BOOST_SP_NOEXCEPT
- {
- std::swap(px, other.px);
- pn.swap(other.pn);
- }
- template<class Y> bool owner_before( shared_ptr<Y> const & rhs ) const BOOST_SP_NOEXCEPT
- {
- return pn < rhs.pn;
- }
- template<class Y> bool owner_before( weak_ptr<Y> const & rhs ) const BOOST_SP_NOEXCEPT
- {
- return pn < rhs.pn;
- }
- void * _internal_get_deleter( boost::detail::sp_typeinfo_ const & ti ) const BOOST_SP_NOEXCEPT
- {
- return pn.get_deleter( ti );
- }
- void * _internal_get_local_deleter( boost::detail::sp_typeinfo_ const & ti ) const BOOST_SP_NOEXCEPT
- {
- return pn.get_local_deleter( ti );
- }
- void * _internal_get_untyped_deleter() const BOOST_SP_NOEXCEPT
- {
- return pn.get_untyped_deleter();
- }
- bool _internal_equiv( shared_ptr const & r ) const BOOST_SP_NOEXCEPT
- {
- return px == r.px && pn == r.pn;
- }
- boost::detail::shared_count _internal_count() const BOOST_SP_NOEXCEPT
- {
- return 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_FRIENDS
- private:
- 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_ptr
- template<class T, class U> inline bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b) BOOST_SP_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_SP_NOEXCEPT
- {
- return a.get() != b.get();
- }
- #if __GNUC__ == 2 && __GNUC_MINOR__ <= 96
- // Resolve the ambiguity between our op!= and the one in rel_ops
- template<class T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b) BOOST_SP_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_SP_NOEXCEPT
- {
- return p.get() == 0;
- }
- template<class T> inline bool operator==( boost::detail::sp_nullptr_t, shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- return p.get() == 0;
- }
- template<class T> inline bool operator!=( shared_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_SP_NOEXCEPT
- {
- return p.get() != 0;
- }
- template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- return p.get() != 0;
- }
- #endif
- template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b) BOOST_SP_NOEXCEPT
- {
- return a.owner_before( b );
- }
- template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b) BOOST_SP_NOEXCEPT
- {
- a.swap(b);
- }
- template<class T, class U> shared_ptr<T> static_pointer_cast( shared_ptr<U> const & r ) BOOST_SP_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_SP_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_SP_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_SP_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 );
- }
- #if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- template<class T, class U> shared_ptr<T> static_pointer_cast( shared_ptr<U> && r ) BOOST_SP_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>( std::move(r), p );
- }
- template<class T, class U> shared_ptr<T> const_pointer_cast( shared_ptr<U> && r ) BOOST_SP_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>( std::move(r), p );
- }
- template<class T, class U> shared_ptr<T> dynamic_pointer_cast( shared_ptr<U> && r ) BOOST_SP_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>( std::move(r), p ): shared_ptr<T>();
- }
- template<class T, class U> shared_ptr<T> reinterpret_pointer_cast( shared_ptr<U> && r ) BOOST_SP_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>( std::move(r), p );
- }
- #endif // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
- // get_pointer() enables boost::mem_fn to recognize shared_ptr
- template<class T> inline typename shared_ptr<T>::element_type * get_pointer(shared_ptr<T> const & p) BOOST_SP_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 _STL
- using 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)
- # else
- template<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_deleter
- namespace detail
- {
- template<class D, class T> D * basic_get_deleter( shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- return static_cast<D *>( p._internal_get_deleter(BOOST_SP_TYPEID_(D)) );
- }
- template<class D, class T> D * basic_get_local_deleter( D *, shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT;
- template<class D, class T> D const * basic_get_local_deleter( D const *, shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT;
- class esft2_deleter_wrapper
- {
- private:
- shared_ptr<void const volatile> deleter_;
- public:
- esft2_deleter_wrapper() BOOST_SP_NOEXCEPT
- {
- }
- template< class T > void set_deleter( shared_ptr<T> const & deleter ) BOOST_SP_NOEXCEPT
- {
- deleter_ = deleter;
- }
- template<typename D> D* get_deleter() const BOOST_SP_NOEXCEPT
- {
- return boost::detail::basic_get_deleter<D>( deleter_ );
- }
- template< class T> void operator()( T* ) BOOST_SP_NOEXCEPT_WITH_ASSERT
- {
- BOOST_ASSERT( deleter_.use_count() <= 1 );
- deleter_.reset();
- }
- };
- } // namespace detail
- template<class D, class T> D * get_deleter( shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- D * d = boost::detail::basic_get_deleter<D>( p );
- if( d == 0 )
- {
- d = boost::detail::basic_get_local_deleter( d, p );
- }
- if( d == 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) d = del_wrapper->::boost::detail::esft2_deleter_wrapper::get_deleter<D>();
- }
- return d;
- }
- // atomic access
- #if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
- template<class T> inline bool atomic_is_lock_free( shared_ptr<T> const * /*p*/ ) BOOST_SP_NOEXCEPT
- {
- return false;
- }
- template<class T> shared_ptr<T> atomic_load( shared_ptr<T> const * p ) BOOST_SP_NOEXCEPT
- {
- boost::detail::spinlock_pool<2>::scoped_lock lock( p );
- return *p;
- }
- template<class T, class M> inline shared_ptr<T> atomic_load_explicit( shared_ptr<T> const * p, /*memory_order mo*/ M ) BOOST_SP_NOEXCEPT
- {
- return atomic_load( p );
- }
- template<class T> void atomic_store( shared_ptr<T> * p, shared_ptr<T> r ) BOOST_SP_NOEXCEPT
- {
- boost::detail::spinlock_pool<2>::scoped_lock lock( p );
- p->swap( r );
- }
- template<class T, class M> inline void atomic_store_explicit( shared_ptr<T> * p, shared_ptr<T> r, /*memory_order mo*/ M ) BOOST_SP_NOEXCEPT
- {
- atomic_store( p, r ); // std::move( r )
- }
- template<class T> shared_ptr<T> atomic_exchange( shared_ptr<T> * p, shared_ptr<T> r ) BOOST_SP_NOEXCEPT
- {
- 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, class M> shared_ptr<T> inline atomic_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> r, /*memory_order mo*/ M ) BOOST_SP_NOEXCEPT
- {
- 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_SP_NOEXCEPT
- {
- 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, class M> inline bool atomic_compare_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w, /*memory_order success*/ M, /*memory_order failure*/ M ) BOOST_SP_NOEXCEPT
- {
- return atomic_compare_exchange( p, v, w ); // std::move( w )
- }
- #endif // !defined(BOOST_SP_NO_ATOMIC_ACCESS)
- // hash_value
- template< class T > struct hash;
- template< class T > std::size_t hash_value( boost::shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- return boost::hash< typename boost::shared_ptr<T>::element_type* >()( p.get() );
- }
- } // namespace boost
- #include <boost/smart_ptr/detail/local_sp_deleter.hpp>
- namespace boost
- {
- namespace detail
- {
- template<class D, class T> D * basic_get_local_deleter( D *, shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- return static_cast<D *>( p._internal_get_local_deleter( BOOST_SP_TYPEID_(local_sp_deleter<D>) ) );
- }
- template<class D, class T> D const * basic_get_local_deleter( D const *, shared_ptr<T> const & p ) BOOST_SP_NOEXCEPT
- {
- return static_cast<D *>( p._internal_get_local_deleter( BOOST_SP_TYPEID_(local_sp_deleter<D>) ) );
- }
- } // namespace detail
- } // namespace boost
- #if defined( BOOST_SP_DISABLE_DEPRECATED )
- #pragma GCC diagnostic pop
- #endif
- #endif // #ifndef BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED
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