-#ifndef BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED\r
-#define BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED\r
-\r
-//\r
-// shared_ptr.hpp\r
-//\r
-// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.\r
-// Copyright (c) 2001-2008 Peter Dimov\r
-//\r
-// Distributed under the Boost Software License, Version 1.0. (See\r
-// accompanying file LICENSE_1_0.txt or copy at\r
-// http://www.boost.org/LICENSE_1_0.txt)\r
-//\r
-// See http://www.boost.org/libs/smart_ptr/shared_ptr.htm for documentation.\r
-//\r
-\r
-#include <boost/config.hpp> // for broken compiler workarounds\r
-\r
-#if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)\r
-#include <boost/smart_ptr/detail/shared_ptr_nmt.hpp>\r
-#else\r
-\r
-// In order to avoid circular dependencies with Boost.TR1\r
-// we make sure that our include of <memory> doesn't try to\r
-// pull in the TR1 headers: that's why we use this header \r
-// rather than including <memory> directly:\r
-#include <boost/config/no_tr1/memory.hpp> // std::auto_ptr\r
-\r
-#include <boost/assert.hpp>\r
-#include <boost/checked_delete.hpp>\r
-#include <boost/throw_exception.hpp>\r
-#include <boost/smart_ptr/detail/shared_count.hpp>\r
-#include <boost/detail/workaround.hpp>\r
-#include <boost/smart_ptr/detail/sp_convertible.hpp>\r
-\r
-#if !defined(BOOST_SP_NO_ATOMIC_ACCESS)\r
-#include <boost/smart_ptr/detail/spinlock_pool.hpp>\r
-#include <boost/memory_order.hpp>\r
-#endif\r
-\r
-#include <algorithm> // for std::swap\r
-#include <functional> // for std::less\r
-#include <typeinfo> // for std::bad_cast\r
-\r
-#if !defined(BOOST_NO_IOSTREAM)\r
-#if !defined(BOOST_NO_IOSFWD)\r
-#include <iosfwd> // for std::basic_ostream\r
-#else\r
-#include <ostream>\r
-#endif\r
-#endif\r
-\r
-#ifdef BOOST_MSVC // moved here to work around VC++ compiler crash\r
-# pragma warning(push)\r
-# pragma warning(disable:4284) // odd return type for operator->\r
-#endif\r
-\r
-namespace boost\r
-{\r
-\r
-template<class T> class shared_ptr;\r
-template<class T> class weak_ptr;\r
-template<class T> class enable_shared_from_this;\r
-template<class T> class enable_shared_from_this2;\r
-\r
-namespace detail\r
-{\r
-\r
-struct static_cast_tag {};\r
-struct const_cast_tag {};\r
-struct dynamic_cast_tag {};\r
-struct polymorphic_cast_tag {};\r
-\r
-template<class T> struct shared_ptr_traits\r
-{\r
- typedef T & reference;\r
-};\r
-\r
-template<> struct shared_ptr_traits<void>\r
-{\r
- typedef void reference;\r
-};\r
-\r
-#if !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)\r
-\r
-template<> struct shared_ptr_traits<void const>\r
-{\r
- typedef void reference;\r
-};\r
-\r
-template<> struct shared_ptr_traits<void volatile>\r
-{\r
- typedef void reference;\r
-};\r
-\r
-template<> struct shared_ptr_traits<void const volatile>\r
-{\r
- typedef void reference;\r
-};\r
-\r
-#endif\r
-\r
-// enable_shared_from_this support\r
-\r
-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 )\r
-{\r
- if( pe != 0 )\r
- {\r
- pe->_internal_accept_owner( ppx, const_cast< Y* >( py ) );\r
- }\r
-}\r
-\r
-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 )\r
-{\r
- if( pe != 0 )\r
- {\r
- pe->_internal_accept_owner( ppx, const_cast< Y* >( py ) );\r
- }\r
-}\r
-\r
-#ifdef _MANAGED\r
-\r
-// Avoid C4793, ... causes native code generation\r
-\r
-struct sp_any_pointer\r
-{\r
- template<class T> sp_any_pointer( T* ) {}\r
-};\r
-\r
-inline void sp_enable_shared_from_this( sp_any_pointer, sp_any_pointer, sp_any_pointer )\r
-{\r
-}\r
-\r
-#else // _MANAGED\r
-\r
-inline void sp_enable_shared_from_this( ... )\r
-{\r
-}\r
-\r
-#endif // _MANAGED\r
-\r
-#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined( BOOST_NO_AUTO_PTR )\r
-\r
-// rvalue auto_ptr support based on a technique by Dave Abrahams\r
-\r
-template< class T, class R > struct sp_enable_if_auto_ptr\r
-{\r
-};\r
-\r
-template< class T, class R > struct sp_enable_if_auto_ptr< std::auto_ptr< T >, R >\r
-{\r
- typedef R type;\r
-}; \r
-\r
-#endif\r
-\r
-} // namespace detail\r
-\r
-\r
-//\r
-// shared_ptr\r
-//\r
-// An enhanced relative of scoped_ptr with reference counted copy semantics.\r
-// The object pointed to is deleted when the last shared_ptr pointing to it\r
-// is destroyed or reset.\r
-//\r
-\r
-template<class T> class shared_ptr\r
-{\r
-private:\r
-\r
- // Borland 5.5.1 specific workaround\r
- typedef shared_ptr<T> this_type;\r
-\r
-public:\r
-\r
- typedef T element_type;\r
- typedef T value_type;\r
- typedef T * pointer;\r
- typedef typename boost::detail::shared_ptr_traits<T>::reference reference;\r
-\r
- shared_ptr(): px(0), pn() // never throws in 1.30+\r
- {\r
- }\r
-\r
- template<class Y>\r
- explicit shared_ptr( Y * p ): px( p ), pn( p ) // Y must be complete\r
- {\r
- boost::detail::sp_enable_shared_from_this( this, p, p );\r
- }\r
-\r
- //\r
- // Requirements: D's copy constructor must not throw\r
- //\r
- // shared_ptr will release p by calling d(p)\r
- //\r
-\r
- template<class Y, class D> shared_ptr(Y * p, D d): px(p), pn(p, d)\r
- {\r
- boost::detail::sp_enable_shared_from_this( this, p, p );\r
- }\r
-\r
- // As above, but with allocator. A's copy constructor shall not throw.\r
-\r
- template<class Y, class D, class A> shared_ptr( Y * p, D d, A a ): px( p ), pn( p, d, a )\r
- {\r
- boost::detail::sp_enable_shared_from_this( this, p, p );\r
- }\r
-\r
-// generated copy constructor, destructor are fine\r
-\r
- template<class Y>\r
- explicit shared_ptr(weak_ptr<Y> const & r): pn(r.pn) // may throw\r
- {\r
- // it is now safe to copy r.px, as pn(r.pn) did not throw\r
- px = r.px;\r
- }\r
-\r
- template<class Y>\r
- shared_ptr( weak_ptr<Y> const & r, boost::detail::sp_nothrow_tag ): px( 0 ), pn( r.pn, boost::detail::sp_nothrow_tag() ) // never throws\r
- {\r
- if( !pn.empty() )\r
- {\r
- px = r.px;\r
- }\r
- }\r
-\r
- template<class Y>\r
-#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )\r
-\r
- shared_ptr( shared_ptr<Y> const & r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )\r
-\r
-#else\r
-\r
- shared_ptr( shared_ptr<Y> const & r )\r
-\r
-#endif\r
- : px( r.px ), pn( r.pn ) // never throws\r
- {\r
- }\r
-\r
- // aliasing\r
- template< class Y >\r
- shared_ptr( shared_ptr<Y> const & r, T * p ): px( p ), pn( r.pn ) // never throws\r
- {\r
- }\r
-\r
- template<class Y>\r
- shared_ptr(shared_ptr<Y> const & r, boost::detail::static_cast_tag): px(static_cast<element_type *>(r.px)), pn(r.pn)\r
- {\r
- }\r
-\r
- template<class Y>\r
- shared_ptr(shared_ptr<Y> const & r, boost::detail::const_cast_tag): px(const_cast<element_type *>(r.px)), pn(r.pn)\r
- {\r
- }\r
-\r
- template<class Y>\r
- shared_ptr(shared_ptr<Y> const & r, boost::detail::dynamic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)\r
- {\r
- if(px == 0) // need to allocate new counter -- the cast failed\r
- {\r
- pn = boost::detail::shared_count();\r
- }\r
- }\r
-\r
- template<class Y>\r
- shared_ptr(shared_ptr<Y> const & r, boost::detail::polymorphic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)\r
- {\r
- if(px == 0)\r
- {\r
- boost::throw_exception(std::bad_cast());\r
- }\r
- }\r
-\r
-#ifndef BOOST_NO_AUTO_PTR\r
-\r
- template<class Y>\r
- explicit shared_ptr(std::auto_ptr<Y> & r): px(r.get()), pn()\r
- {\r
- Y * tmp = r.get();\r
- pn = boost::detail::shared_count(r);\r
- boost::detail::sp_enable_shared_from_this( this, tmp, tmp );\r
- }\r
-\r
-#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )\r
-\r
- template<class Ap>\r
- explicit shared_ptr( Ap r, typename boost::detail::sp_enable_if_auto_ptr<Ap, int>::type = 0 ): px( r.get() ), pn()\r
- {\r
- typename Ap::element_type * tmp = r.get();\r
- pn = boost::detail::shared_count( r );\r
- boost::detail::sp_enable_shared_from_this( this, tmp, tmp );\r
- }\r
-\r
-\r
-#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION\r
-\r
-#endif // BOOST_NO_AUTO_PTR\r
-\r
- // assignment\r
-\r
- shared_ptr & operator=( shared_ptr const & r ) // never throws\r
- {\r
- this_type(r).swap(*this);\r
- return *this;\r
- }\r
-\r
-#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1400)\r
-\r
- template<class Y>\r
- shared_ptr & operator=(shared_ptr<Y> const & r) // never throws\r
- {\r
- this_type(r).swap(*this);\r
- return *this;\r
- }\r
-\r
-#endif\r
-\r
-#ifndef BOOST_NO_AUTO_PTR\r
-\r
- template<class Y>\r
- shared_ptr & operator=( std::auto_ptr<Y> & r )\r
- {\r
- this_type(r).swap(*this);\r
- return *this;\r
- }\r
-\r
-#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )\r
-\r
- template<class Ap>\r
- typename boost::detail::sp_enable_if_auto_ptr< Ap, shared_ptr & >::type operator=( Ap r )\r
- {\r
- this_type( r ).swap( *this );\r
- return *this;\r
- }\r
-\r
-\r
-#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION\r
-\r
-#endif // BOOST_NO_AUTO_PTR\r
-\r
-// Move support\r
-\r
-#if defined( BOOST_HAS_RVALUE_REFS )\r
-\r
- shared_ptr( shared_ptr && r ): px( r.px ), pn() // never throws\r
- {\r
- pn.swap( r.pn );\r
- r.px = 0;\r
- }\r
-\r
- template<class Y>\r
-#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )\r
-\r
- shared_ptr( shared_ptr<Y> && r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )\r
-\r
-#else\r
-\r
- shared_ptr( shared_ptr<Y> && r )\r
-\r
-#endif\r
- : px( r.px ), pn() // never throws\r
- {\r
- pn.swap( r.pn );\r
- r.px = 0;\r
- }\r
-\r
- shared_ptr & operator=( shared_ptr && r ) // never throws\r
- {\r
- this_type( std::move( r ) ).swap( *this );\r
- return *this;\r
- }\r
-\r
- template<class Y>\r
- shared_ptr & operator=( shared_ptr<Y> && r ) // never throws\r
- {\r
- this_type( std::move( r ) ).swap( *this );\r
- return *this;\r
- }\r
-\r
-#endif\r
-\r
- void reset() // never throws in 1.30+\r
- {\r
- this_type().swap(*this);\r
- }\r
-\r
- template<class Y> void reset(Y * p) // Y must be complete\r
- {\r
- BOOST_ASSERT(p == 0 || p != px); // catch self-reset errors\r
- this_type(p).swap(*this);\r
- }\r
-\r
- template<class Y, class D> void reset( Y * p, D d )\r
- {\r
- this_type( p, d ).swap( *this );\r
- }\r
-\r
- template<class Y, class D, class A> void reset( Y * p, D d, A a )\r
- {\r
- this_type( p, d, a ).swap( *this );\r
- }\r
-\r
- template<class Y> void reset( shared_ptr<Y> const & r, T * p )\r
- {\r
- this_type( r, p ).swap( *this );\r
- }\r
-\r
- reference operator* () const // never throws\r
- {\r
- BOOST_ASSERT(px != 0);\r
- return *px;\r
- }\r
-\r
- T * operator-> () const // never throws\r
- {\r
- BOOST_ASSERT(px != 0);\r
- return px;\r
- }\r
-\r
- T * get() const // never throws\r
- {\r
- return px;\r
- }\r
-\r
-// implicit conversion to "bool"\r
-#include <boost/smart_ptr/detail/operator_bool.hpp>\r
-\r
- bool unique() const // never throws\r
- {\r
- return pn.unique();\r
- }\r
-\r
- long use_count() const // never throws\r
- {\r
- return pn.use_count();\r
- }\r
-\r
- void swap(shared_ptr<T> & other) // never throws\r
- {\r
- std::swap(px, other.px);\r
- pn.swap(other.pn);\r
- }\r
-\r
- template<class Y> bool _internal_less(shared_ptr<Y> const & rhs) const\r
- {\r
- return pn < rhs.pn;\r
- }\r
-\r
- void * _internal_get_deleter( detail::sp_typeinfo const & ti ) const\r
- {\r
- return pn.get_deleter( ti );\r
- }\r
-\r
- bool _internal_equiv( shared_ptr const & r ) const\r
- {\r
- return px == r.px && pn == r.pn;\r
- }\r
-\r
-// Tasteless as this may seem, making all members public allows member templates\r
-// to work in the absence of member template friends. (Matthew Langston)\r
-\r
-#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS\r
-\r
-private:\r
-\r
- template<class Y> friend class shared_ptr;\r
- template<class Y> friend class weak_ptr;\r
-\r
-\r
-#endif\r
-\r
- T * px; // contained pointer\r
- boost::detail::shared_count pn; // reference counter\r
-\r
-}; // shared_ptr\r
-\r
-template<class T, class U> inline bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b)\r
-{\r
- return a.get() == b.get();\r
-}\r
-\r
-template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b)\r
-{\r
- return a.get() != b.get();\r
-}\r
-\r
-#if __GNUC__ == 2 && __GNUC_MINOR__ <= 96\r
-\r
-// Resolve the ambiguity between our op!= and the one in rel_ops\r
-\r
-template<class T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b)\r
-{\r
- return a.get() != b.get();\r
-}\r
-\r
-#endif\r
-\r
-template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b)\r
-{\r
- return a._internal_less(b);\r
-}\r
-\r
-template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b)\r
-{\r
- a.swap(b);\r
-}\r
-\r
-template<class T, class U> shared_ptr<T> static_pointer_cast(shared_ptr<U> const & r)\r
-{\r
- return shared_ptr<T>(r, boost::detail::static_cast_tag());\r
-}\r
-\r
-template<class T, class U> shared_ptr<T> const_pointer_cast(shared_ptr<U> const & r)\r
-{\r
- return shared_ptr<T>(r, boost::detail::const_cast_tag());\r
-}\r
-\r
-template<class T, class U> shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const & r)\r
-{\r
- return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());\r
-}\r
-\r
-// shared_*_cast names are deprecated. Use *_pointer_cast instead.\r
-\r
-template<class T, class U> shared_ptr<T> shared_static_cast(shared_ptr<U> const & r)\r
-{\r
- return shared_ptr<T>(r, boost::detail::static_cast_tag());\r
-}\r
-\r
-template<class T, class U> shared_ptr<T> shared_dynamic_cast(shared_ptr<U> const & r)\r
-{\r
- return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());\r
-}\r
-\r
-template<class T, class U> shared_ptr<T> shared_polymorphic_cast(shared_ptr<U> const & r)\r
-{\r
- return shared_ptr<T>(r, boost::detail::polymorphic_cast_tag());\r
-}\r
-\r
-template<class T, class U> shared_ptr<T> shared_polymorphic_downcast(shared_ptr<U> const & r)\r
-{\r
- BOOST_ASSERT(dynamic_cast<T *>(r.get()) == r.get());\r
- return shared_static_cast<T>(r);\r
-}\r
-\r
-// get_pointer() enables boost::mem_fn to recognize shared_ptr\r
-\r
-template<class T> inline T * get_pointer(shared_ptr<T> const & p)\r
-{\r
- return p.get();\r
-}\r
-\r
-// operator<<\r
-\r
-#if !defined(BOOST_NO_IOSTREAM)\r
-\r
-#if defined(BOOST_NO_TEMPLATED_IOSTREAMS) || ( defined(__GNUC__) && (__GNUC__ < 3) )\r
-\r
-template<class Y> std::ostream & operator<< (std::ostream & os, shared_ptr<Y> const & p)\r
-{\r
- os << p.get();\r
- return os;\r
-}\r
-\r
-#else\r
-\r
-// in STLport's no-iostreams mode no iostream symbols can be used\r
-#ifndef _STLP_NO_IOSTREAMS\r
-\r
-# if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)\r
-// MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL\r
-using std::basic_ostream;\r
-template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, shared_ptr<Y> const & p)\r
-# else\r
-template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, shared_ptr<Y> const & p)\r
-# endif\r
-{\r
- os << p.get();\r
- return os;\r
-}\r
-\r
-#endif // _STLP_NO_IOSTREAMS\r
-\r
-#endif // __GNUC__ < 3\r
-\r
-#endif // !defined(BOOST_NO_IOSTREAM)\r
-\r
-// get_deleter\r
-\r
-#if ( defined(__GNUC__) && BOOST_WORKAROUND(__GNUC__, < 3) ) || \\r
- ( defined(__EDG_VERSION__) && BOOST_WORKAROUND(__EDG_VERSION__, <= 238) ) || \\r
- ( defined(__HP_aCC) && BOOST_WORKAROUND(__HP_aCC, <= 33500) )\r
-\r
-// g++ 2.9x doesn't allow static_cast<X const *>(void *)\r
-// apparently EDG 2.38 and HP aCC A.03.35 also don't accept it\r
-\r
-template<class D, class T> D * get_deleter(shared_ptr<T> const & p)\r
-{\r
- void const * q = p._internal_get_deleter(BOOST_SP_TYPEID(D));\r
- return const_cast<D *>(static_cast<D const *>(q));\r
-}\r
-\r
-#else\r
-\r
-template<class D, class T> D * get_deleter(shared_ptr<T> const & p)\r
-{\r
- return static_cast<D *>(p._internal_get_deleter(BOOST_SP_TYPEID(D)));\r
-}\r
-\r
-#endif\r
-\r
-// atomic access\r
-\r
-#if !defined(BOOST_SP_NO_ATOMIC_ACCESS)\r
-\r
-template<class T> inline bool atomic_is_lock_free( shared_ptr<T> const * /*p*/ )\r
-{\r
- return false;\r
-}\r
-\r
-template<class T> shared_ptr<T> atomic_load( shared_ptr<T> const * p )\r
-{\r
- boost::detail::spinlock_pool<2>::scoped_lock lock( p );\r
- return *p;\r
-}\r
-\r
-template<class T> inline shared_ptr<T> atomic_load_explicit( shared_ptr<T> const * p, memory_order /*mo*/ )\r
-{\r
- return atomic_load( p );\r
-}\r
-\r
-template<class T> void atomic_store( shared_ptr<T> * p, shared_ptr<T> r )\r
-{\r
- boost::detail::spinlock_pool<2>::scoped_lock lock( p );\r
- p->swap( r );\r
-}\r
-\r
-template<class T> inline void atomic_store_explicit( shared_ptr<T> * p, shared_ptr<T> r, memory_order /*mo*/ )\r
-{\r
- atomic_store( p, r ); // std::move( r )\r
-}\r
-\r
-template<class T> shared_ptr<T> atomic_exchange( shared_ptr<T> * p, shared_ptr<T> r )\r
-{\r
- boost::detail::spinlock & sp = boost::detail::spinlock_pool<2>::spinlock_for( p );\r
-\r
- sp.lock();\r
- p->swap( r );\r
- sp.unlock();\r
-\r
- return r; // return std::move( r )\r
-}\r
-\r
-template<class T> shared_ptr<T> atomic_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> r, memory_order /*mo*/ )\r
-{\r
- return atomic_exchange( p, r ); // std::move( r )\r
-}\r
-\r
-template<class T> bool atomic_compare_exchange( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w )\r
-{\r
- boost::detail::spinlock & sp = boost::detail::spinlock_pool<2>::spinlock_for( p );\r
-\r
- sp.lock();\r
-\r
- if( p->_internal_equiv( *v ) )\r
- {\r
- p->swap( w );\r
-\r
- sp.unlock();\r
-\r
- return true;\r
- }\r
- else\r
- {\r
- shared_ptr<T> tmp( *p );\r
-\r
- sp.unlock();\r
-\r
- tmp.swap( *v );\r
- return false;\r
- }\r
-}\r
-\r
-template<class T> inline bool atomic_compare_exchange_explicit( shared_ptr<T> * p, shared_ptr<T> * v, shared_ptr<T> w, memory_order /*success*/, memory_order /*failure*/ )\r
-{\r
- return atomic_compare_exchange( p, v, w ); // std::move( w )\r
-}\r
-\r
-#endif\r
-\r
-} // namespace boost\r
-\r
-#ifdef BOOST_MSVC\r
-# pragma warning(pop)\r
-#endif\r
-\r
-#endif // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)\r
-\r
-#endif // #ifndef BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED\r
+#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
+
+#if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
+#include <boost/smart_ptr/detail/shared_ptr_nmt.hpp>
+#else
+
+// 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>
+
+#if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
+#include <boost/smart_ptr/detail/spinlock_pool.hpp>
+#include <boost/memory_order.hpp>
+#endif
+
+#include <algorithm> // for std::swap
+#include <functional> // for std::less
+#include <typeinfo> // for std::bad_cast
+
+#if !defined(BOOST_NO_IOSTREAM)
+#if !defined(BOOST_NO_IOSFWD)
+#include <iosfwd> // for std::basic_ostream
+#else
+#include <ostream>
+#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;
+
+namespace detail
+{
+
+struct static_cast_tag {};
+struct const_cast_tag {};
+struct dynamic_cast_tag {};
+struct polymorphic_cast_tag {};
+
+template<class T> struct shared_ptr_traits
+{
+ typedef T & reference;
+};
+
+template<> struct shared_ptr_traits<void>
+{
+ typedef void reference;
+};
+
+#if !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
+
+template<> struct shared_ptr_traits<void const>
+{
+ typedef void reference;
+};
+
+template<> struct shared_ptr_traits<void volatile>
+{
+ typedef void reference;
+};
+
+template<> struct shared_ptr_traits<void const volatile>
+{
+ typedef void reference;
+};
+
+#endif
+
+// 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, 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 ) );
+ }
+}
+
+#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
+
+} // 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 T element_type;
+ typedef T value_type;
+ typedef T * pointer;
+ typedef typename boost::detail::shared_ptr_traits<T>::reference reference;
+
+ shared_ptr(): px(0), pn() // never throws in 1.30+
+ {
+ }
+
+ template<class Y>
+ explicit shared_ptr( Y * p ): px( p ), pn( p ) // Y must be complete
+ {
+ boost::detail::sp_enable_shared_from_this( this, p, p );
+ }
+
+ //
+ // 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_enable_shared_from_this( this, p, p );
+ }
+
+ // 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 );
+ }
+
+// generated copy constructor, destructor are fine
+
+ template<class Y>
+ explicit shared_ptr(weak_ptr<Y> const & r): pn(r.pn) // may throw
+ {
+ // 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
+ {
+ if( !pn.empty() )
+ {
+ px = r.px;
+ }
+ }
+
+ template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+ shared_ptr( shared_ptr<Y> const & r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )
+
+#else
+
+ shared_ptr( shared_ptr<Y> const & r )
+
+#endif
+ : px( r.px ), pn( r.pn ) // never throws
+ {
+ }
+
+ // aliasing
+ template< class Y >
+ shared_ptr( shared_ptr<Y> const & r, T * p ): px( p ), pn( r.pn ) // never throws
+ {
+ }
+
+ 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)
+ {
+ }
+
+ 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)
+ {
+ }
+
+ 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();
+ }
+ }
+
+ 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());
+ }
+ }
+
+#ifndef BOOST_NO_AUTO_PTR
+
+ template<class Y>
+ explicit shared_ptr(std::auto_ptr<Y> & r): px(r.get()), pn()
+ {
+ Y * tmp = r.get();
+ pn = boost::detail::shared_count(r);
+ boost::detail::sp_enable_shared_from_this( this, tmp, tmp );
+ }
+
+#if !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();
+ pn = boost::detail::shared_count( r );
+ boost::detail::sp_enable_shared_from_this( this, tmp, tmp );
+ }
+
+
+#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+#endif // BOOST_NO_AUTO_PTR
+
+ // assignment
+
+ shared_ptr & operator=( shared_ptr const & r ) // never throws
+ {
+ 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) // never throws
+ {
+ 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_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
+
+// Move support
+
+#if defined( BOOST_HAS_RVALUE_REFS )
+
+ shared_ptr( shared_ptr && r ): px( r.px ), pn() // never throws
+ {
+ pn.swap( r.pn );
+ r.px = 0;
+ }
+
+ template<class Y>
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE )
+
+ shared_ptr( shared_ptr<Y> && r, typename detail::sp_enable_if_convertible<Y,T>::type = detail::sp_empty() )
+
+#else
+
+ shared_ptr( shared_ptr<Y> && r )
+
+#endif
+ : px( r.px ), pn() // never throws
+ {
+ pn.swap( r.pn );
+ r.px = 0;
+ }
+
+ shared_ptr & operator=( shared_ptr && r ) // never throws
+ {
+ this_type( std::move( r ) ).swap( *this );
+ return *this;
+ }
+
+ template<class Y>
+ shared_ptr & operator=( shared_ptr<Y> && r ) // never throws
+ {
+ this_type( std::move( r ) ).swap( *this );
+ return *this;
+ }
+
+#endif
+
+ void reset() // 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, T * p )
+ {
+ this_type( r, p ).swap( *this );
+ }
+
+ reference operator* () const // never throws
+ {
+ BOOST_ASSERT(px != 0);
+ return *px;
+ }
+
+ T * operator-> () const // never throws
+ {
+ BOOST_ASSERT(px != 0);
+ return px;
+ }
+
+ T * get() const // never throws
+ {
+ return px;
+ }
+
+// implicit conversion to "bool"
+#include <boost/smart_ptr/detail/operator_bool.hpp>
+
+ bool unique() const // never throws
+ {
+ return pn.unique();
+ }
+
+ long use_count() const // never throws
+ {
+ return pn.use_count();
+ }
+
+ void swap(shared_ptr<T> & other) // never throws
+ {
+ std::swap(px, other.px);
+ pn.swap(other.pn);
+ }
+
+ template<class Y> bool _internal_less(shared_ptr<Y> const & rhs) const
+ {
+ return pn < rhs.pn;
+ }
+
+ void * _internal_get_deleter( detail::sp_typeinfo const & ti ) const
+ {
+ return pn.get_deleter( ti );
+ }
+
+ bool _internal_equiv( shared_ptr const & r ) const
+ {
+ 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_FRIENDS
+
+private:
+
+ template<class Y> friend class shared_ptr;
+ template<class Y> friend class weak_ptr;
+
+
+#endif
+
+ T * 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)
+{
+ return a.get() == b.get();
+}
+
+template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b)
+{
+ 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)
+{
+ return a.get() != b.get();
+}
+
+#endif
+
+template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b)
+{
+ return a._internal_less(b);
+}
+
+template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b)
+{
+ a.swap(b);
+}
+
+template<class T, class U> shared_ptr<T> static_pointer_cast(shared_ptr<U> const & r)
+{
+ return shared_ptr<T>(r, boost::detail::static_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> const_pointer_cast(shared_ptr<U> const & r)
+{
+ return shared_ptr<T>(r, boost::detail::const_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const & r)
+{
+ return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
+}
+
+// shared_*_cast names are deprecated. Use *_pointer_cast instead.
+
+template<class T, class U> shared_ptr<T> shared_static_cast(shared_ptr<U> const & r)
+{
+ return shared_ptr<T>(r, boost::detail::static_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> shared_dynamic_cast(shared_ptr<U> const & r)
+{
+ return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> shared_polymorphic_cast(shared_ptr<U> const & r)
+{
+ return shared_ptr<T>(r, boost::detail::polymorphic_cast_tag());
+}
+
+template<class T, class U> shared_ptr<T> shared_polymorphic_downcast(shared_ptr<U> const & r)
+{
+ BOOST_ASSERT(dynamic_cast<T *>(r.get()) == r.get());
+ return shared_static_cast<T>(r);
+}
+
+// get_pointer() enables boost::mem_fn to recognize shared_ptr
+
+template<class T> inline T * get_pointer(shared_ptr<T> const & p)
+{
+ 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
+
+#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 it
+
+template<class D, class T> D * 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));
+}
+
+#else
+
+template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
+{
+ return static_cast<D *>(p._internal_get_deleter(BOOST_SP_TYPEID(D)));
+}
+
+#endif
+
+// atomic access
+
+#if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
+
+template<class T> inline bool atomic_is_lock_free( shared_ptr<T> const * /*p*/ )
+{
+ 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*/ )
+{
+ 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*/ )
+{
+ 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*/ )
+{
+ 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*/, memory_order /*failure*/ )
+{
+ return atomic_compare_exchange( p, v, w ); // std::move( w )
+}
+
+#endif
+
+} // namespace boost
+
+#ifdef BOOST_MSVC
+# pragma warning(pop)
+#endif
+
+#endif // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
+
+#endif // #ifndef BOOST_SMART_PTR_SHARED_PTR_HPP_INCLUDED
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