X-Git-Url: https://git.donarmstrong.com/?p=rsem.git;a=blobdiff_plain;f=boost%2Fsmart_ptr%2Fshared_ptr.hpp;h=9259ca0f06d59647603c2ade590ddff8624fd697;hp=609cce903221ab5687ccbabc9d651348e883dc76;hb=2d71eb92104693ca9baa5a2e1c23eeca776d8fd3;hpb=da57529b92adbb7ae74a89861cb39fb35ac7c62d

diff --git a/boost/smart_ptr/shared_ptr.hpp b/boost/smart_ptr/shared_ptr.hpp
index 609cce9..9259ca0 100644
--- a/boost/smart_ptr/shared_ptr.hpp
+++ b/boost/smart_ptr/shared_ptr.hpp
@@ -32,6 +32,7 @@
 #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>
@@ -41,6 +42,7 @@
 #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)
@@ -50,56 +52,157 @@
 #endif
 #endif
 
-#ifdef BOOST_MSVC  // moved here to work around VC++ compiler crash
-# pragma warning(push)
-# pragma warning(disable:4284) // odd return type for operator->
-#endif
-
 namespace boost
 {
 
 template<class T> class shared_ptr;
 template<class T> class weak_ptr;
 template<class T> class enable_shared_from_this;
-template<class T> class enable_shared_from_this2;
+class enable_shared_from_raw;
 
 namespace detail
 {
 
-struct static_cast_tag {};
-struct const_cast_tag {};
-struct dynamic_cast_tag {};
-struct polymorphic_cast_tag {};
+// 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 shared_ptr_traits
+template< class T > struct sp_dereference
 {
-    typedef T & reference;
+    typedef T & type;
 };
 
-template<> struct shared_ptr_traits<void>
+template<> struct sp_dereference< void >
 {
-    typedef void reference;
+    typedef void type;
 };
 
 #if !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
 
-template<> struct shared_ptr_traits<void const>
+template<> struct sp_dereference< void const >
 {
-    typedef void reference;
+    typedef void type;
 };
 
-template<> struct shared_ptr_traits<void volatile>
+template<> struct sp_dereference< void volatile >
 {
-    typedef void reference;
+    typedef void type;
 };
 
-template<> struct shared_ptr_traits<void const volatile>
+template<> struct sp_dereference< void const volatile >
 {
-    typedef void reference;
+    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 )
@@ -110,13 +213,7 @@ template< class X, class Y, class T > inline void sp_enable_shared_from_this( bo
     }
 }
 
-template< class X, class Y, class T > inline void sp_enable_shared_from_this( boost::shared_ptr<X> * ppx, Y const * py, boost::enable_shared_from_this2< 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
 
@@ -154,6 +251,69 @@ template< class T, class R > struct sp_enable_if_auto_ptr< std::auto_ptr< T >, R
 
 #endif
 
+// sp_assert_convertible
+
+template< 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 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 )
+
 } // namespace detail
 
 
@@ -174,19 +334,24 @@ private:
 
 public:
 
-    typedef T element_type;
-    typedef T value_type;
-    typedef T * pointer;
-    typedef typename boost::detail::shared_ptr_traits<T>::reference reference;
+    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(): px(0), pn() // never throws in 1.30+
+    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( p ) // Y must be complete
+    explicit shared_ptr( Y * p ): px( p ), pn() // Y must be complete
     {
-        boost::detail::sp_enable_shared_from_this( this, p, p );
+        boost::detail::sp_pointer_construct( this, p, pn );
     }
 
     //
@@ -195,29 +360,58 @@ public:
     // 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)
+    template<class Y, class D> shared_ptr( Y * p, D d ): px( p ), pn( p, d )
     {
-        boost::detail::sp_enable_shared_from_this( this, p, p );
+        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_enable_shared_from_this( this, p, p );
+        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 )
+    {
     }
 
-//  generated copy constructor, destructor are fine
+#endif
 
     template<class Y>
-    explicit shared_ptr(weak_ptr<Y> const & r): pn(r.pn) // may throw
+    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 ): px( 0 ), pn( r.pn, boost::detail::sp_nothrow_tag() ) // never throws
+    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() )
         {
@@ -235,72 +429,80 @@ public:
     shared_ptr( shared_ptr<Y> const & r )
 
 #endif
-    : px( r.px ), pn( r.pn ) // never throws
+    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, T * p ): px( p ), pn( r.pn ) // never throws
+    shared_ptr( shared_ptr<Y> const & r, element_type * p ) BOOST_NOEXCEPT : px( p ), pn( r.pn )
     {
     }
 
-    template<class Y>
-    shared_ptr(shared_ptr<Y> const & r, boost::detail::static_cast_tag): px(static_cast<element_type *>(r.px)), pn(r.pn)
-    {
-    }
+#ifndef BOOST_NO_AUTO_PTR
 
     template<class Y>
-    shared_ptr(shared_ptr<Y> const & r, boost::detail::const_cast_tag): px(const_cast<element_type *>(r.px)), pn(r.pn)
+    explicit shared_ptr( std::auto_ptr<Y> & r ): px(r.get()), pn()
     {
-    }
+        boost::detail::sp_assert_convertible< Y, T >();
 
-    template<class Y>
-    shared_ptr(shared_ptr<Y> const & r, boost::detail::dynamic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
-    {
-        if(px == 0) // need to allocate new counter -- the cast failed
-        {
-            pn = boost::detail::shared_count();
-        }
-    }
+        Y * tmp = r.get();
+        pn = boost::detail::shared_count( r );
 
-    template<class Y>
-    shared_ptr(shared_ptr<Y> const & r, boost::detail::polymorphic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
-    {
-        if(px == 0)
-        {
-            boost::throw_exception(std::bad_cast());
-        }
+        boost::detail::sp_deleter_construct( this, tmp );
     }
 
-#ifndef BOOST_NO_AUTO_PTR
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
 
     template<class Y>
-    explicit shared_ptr(std::auto_ptr<Y> & r): px(r.get()), pn()
+    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_enable_shared_from_this( this, tmp, tmp );
+        pn = boost::detail::shared_count( r );
+
+        boost::detail::sp_deleter_construct( this, tmp );
     }
 
-#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
+#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()
     {
-        typename Ap::element_type * tmp = r.get();
+        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_enable_shared_from_this( this, tmp, tmp );
-    }
 
+        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 ) // never throws
+    shared_ptr & operator=( shared_ptr const & r ) BOOST_NOEXCEPT
     {
         this_type(r).swap(*this);
         return *this;
@@ -309,7 +511,7 @@ public:
 #if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1400)
 
     template<class Y>
-    shared_ptr & operator=(shared_ptr<Y> const & r) // never throws
+    shared_ptr & operator=(shared_ptr<Y> const & r) BOOST_NOEXCEPT
     {
         this_type(r).swap(*this);
         return *this;
@@ -322,11 +524,20 @@ public:
     template<class Y>
     shared_ptr & operator=( std::auto_ptr<Y> & r )
     {
-        this_type(r).swap(*this);
+        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;
     }
 
-#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
+#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 )
@@ -335,16 +546,26 @@ public:
         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_HAS_RVALUE_REFS )
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
 
-    shared_ptr( shared_ptr && r ): px( r.px ), pn() // never throws
+    shared_ptr( shared_ptr && r ) BOOST_NOEXCEPT : px( r.px ), pn()
     {
         pn.swap( r.pn );
         r.px = 0;
@@ -360,20 +581,22 @@ public:
     shared_ptr( shared_ptr<Y> && r )
 
 #endif
-    : px( r.px ), pn() // never throws
+    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 ) // never throws
+    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 ) // never throws
+    shared_ptr & operator=( shared_ptr<Y> && r ) BOOST_NOEXCEPT
     {
         this_type( static_cast< shared_ptr<Y> && >( r ) ).swap( *this );
         return *this;
@@ -381,15 +604,25 @@ public:
 
 #endif
 
-    void reset() // never throws in 1.30+
+#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
+    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);
+        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 )
@@ -402,24 +635,35 @@ public:
         this_type( p, d, a ).swap( *this );
     }
 
-    template<class Y> void reset( shared_ptr<Y> const & r, T * p )
+    template<class Y> void reset( shared_ptr<Y> const & r, element_type * p )
     {
         this_type( r, p ).swap( *this );
     }
-
-    reference operator* () const // never throws
+    
+    // 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);
+        BOOST_ASSERT( px != 0 );
         return *px;
     }
-
-    T * operator-> () const // never throws
+    
+    // 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);
+        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 px[ i ];
+    }
 
-    T * get() const // never throws
+    element_type * get() const BOOST_NOEXCEPT
     {
         return px;
     }
@@ -427,33 +671,43 @@ public:
 // implicit conversion to "bool"
 #include <boost/smart_ptr/detail/operator_bool.hpp>
 
-    bool unique() const // never throws
+    bool unique() const BOOST_NOEXCEPT
     {
         return pn.unique();
     }
 
-    long use_count() const // never throws
+    long use_count() const BOOST_NOEXCEPT
     {
         return pn.use_count();
     }
 
-    void swap(shared_ptr<T> & other) // never throws
+    void swap( shared_ptr & other ) BOOST_NOEXCEPT
     {
         std::swap(px, other.px);
         pn.swap(other.pn);
     }
 
-    template<class Y> bool _internal_less(shared_ptr<Y> const & rhs) const
+    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
+    void * _internal_get_deleter( boost::detail::sp_typeinfo const & ti ) const BOOST_NOEXCEPT
     {
         return pn.get_deleter( ti );
     }
 
-    bool _internal_equiv( shared_ptr const & r ) const
+    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;
     }
@@ -471,17 +725,17 @@ private:
 
 #endif
 
-    T * px;                     // contained pointer
+    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)
+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();
 }
 
-template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b)
+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();
 }
@@ -490,64 +744,90 @@ template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, share
 
 // 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)
+template<class T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b) BOOST_NOEXCEPT
 {
     return a.get() != b.get();
 }
 
 #endif
 
-template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b)
+#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 a._internal_less(b);
+    return p.get() == 0;
 }
 
-template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b)
+template<class T> inline bool operator==( boost::detail::sp_nullptr_t, shared_ptr<T> const & p ) BOOST_NOEXCEPT
 {
-    a.swap(b);
+    return p.get() == 0;
 }
 
-template<class T, class U> shared_ptr<T> static_pointer_cast(shared_ptr<U> const & r)
+template<class T> inline bool operator!=( shared_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
 {
-    return shared_ptr<T>(r, boost::detail::static_cast_tag());
+    return p.get() != 0;
 }
 
-template<class T, class U> shared_ptr<T> const_pointer_cast(shared_ptr<U> const & r)
+template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, shared_ptr<T> const & p ) BOOST_NOEXCEPT
 {
-    return shared_ptr<T>(r, boost::detail::const_cast_tag());
+    return p.get() != 0;
 }
 
-template<class T, class U> shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const & r)
+#endif
+
+template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b) BOOST_NOEXCEPT
 {
-    return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
+    return a.owner_before( b );
 }
 
-// shared_*_cast names are deprecated. Use *_pointer_cast instead.
+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> shared_static_cast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> static_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
 {
-    return shared_ptr<T>(r, boost::detail::static_cast_tag());
+    (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> shared_dynamic_cast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> const_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
 {
-    return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
+    (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> shared_polymorphic_cast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> dynamic_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
 {
-    return shared_ptr<T>(r, boost::detail::polymorphic_cast_tag());
+    (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> shared_polymorphic_downcast(shared_ptr<U> const & r)
+template<class T, class U> shared_ptr<T> reinterpret_pointer_cast( shared_ptr<U> const & r ) BOOST_NOEXCEPT
 {
-    BOOST_ASSERT(dynamic_cast<T *>(r.get()) == r.get());
-    return shared_static_cast<T>(r);
+    (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_ptr
 
-template<class T> inline T * get_pointer(shared_ptr<T> const & p)
+template<class T> inline typename shared_ptr<T>::element_type * get_pointer(shared_ptr<T> const & p) BOOST_NOEXCEPT
 {
     return p.get();
 }
@@ -589,6 +869,9 @@ template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::
 
 // get_deleter
 
+namespace detail
+{
+
 #if ( defined(__GNUC__) && BOOST_WORKAROUND(__GNUC__, < 3) ) || \
     ( defined(__EDG_VERSION__) && BOOST_WORKAROUND(__EDG_VERSION__, <= 238) ) || \
     ( defined(__HP_aCC) && BOOST_WORKAROUND(__HP_aCC, <= 33500) )
@@ -596,7 +879,7 @@ template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::
 // 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 it
 
-template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
+template<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));
@@ -604,18 +887,64 @@ template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
 
 #else
 
-template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
+template<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)));
+    return static_cast<D *>( p._internal_get_deleter(BOOST_SP_TYPEID(D)) );
 }
 
 #endif
 
+class esft2_deleter_wrapper
+{
+private:
+
+    shared_ptr<void> 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 detail
+
+template<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*/ )
+template<class T> inline bool atomic_is_lock_free( shared_ptr<T> const * /*p*/ ) BOOST_NOEXCEPT
 {
     return false;
 }
@@ -688,13 +1017,18 @@ template<class T> inline bool atomic_compare_exchange_explicit( shared_ptr<T> *
     return atomic_compare_exchange( p, v, w ); // std::move( w )
 }
 
-#endif
+#endif // !defined(BOOST_SP_NO_ATOMIC_ACCESS)
 
-} // namespace boost
+// hash_value
 
-#ifdef BOOST_MSVC
-# pragma warning(pop)
-#endif
+template< 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  // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)