FCL/sf/os/ossrv: comparison ossrv_pub/boost_apis/boost/shared

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+:e4d67989cc36
+#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
+#define BOOST_SHARED_PTR_HPP_INCLUDED
+//
+//  shared_ptr.hpp
+//
+//  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
+//  Copyright (c) 2001-2006 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/detail/shared_ptr_nmt.hpp>
+#else
+#include <memory>               // for std::auto_ptr
+#include <boost/assert.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/detail/shared_count.hpp>
+#include <boost/detail/workaround.hpp>
+#include <algorithm>            // for std::swap
+#include <functional>           // for std::less
+#include <typeinfo>             // for std::bad_cast
+#include <iosfwd>               // for std::basic_ostream
+#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 weak_ptr;
+template<class T> class enable_shared_from_this;
+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 T, class Y> void sp_enable_shared_from_this( shared_count const & pn, boost::enable_shared_from_this<T> const * pe, Y const * px )
+{
+if(pe != 0) pe->_internal_weak_this._internal_assign(const_cast<Y*>(px), pn);
+}
+#ifdef sgi
+// Turn off: the last argument of the varargs function "sp_enable_shared_from_this" is unnamed
+# pragma set woff 3506
+#endif
+inline void sp_enable_shared_from_this( shared_count const & /*pn*/, ... )
+{
+}
+#ifdef sgi
+# pragma reset woff 3506
+#endif
+#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( pn, 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( pn, 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( pn, p, p );
+}
+//  generated copy constructor, assignment, destructor are fine...
+//  except that Borland C++ has a bug, and g++ with -Wsynth warns
+#if defined(__BORLANDC__) || defined(__GNUC__)
+shared_ptr & operator=(shared_ptr const & r) // never throws
+{
+px = r.px;
+pn = r.pn; // shared_count::op= doesn't throw
+return *this;
+}
+#endif
+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(shared_ptr<Y> const & r): px(r.px), 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( pn, 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( pn, tmp, tmp );
+}
+#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+#endif // BOOST_NO_AUTO_PTR
+#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1300)
+template<class Y>
+shared_ptr & operator=(shared_ptr<Y> const & r) // never throws
+{
+px = r.px;
+pn = r.pn; // shared_count::op= doesn't throw
+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
+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 );
+}
+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"
+#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x580)
+operator bool () const
+{
+return px != 0;
+}
+#elif defined( _MANAGED )
+static void unspecified_bool( this_type*** )
+{
+}
+typedef void (*unspecified_bool_type)( this_type*** );
+operator unspecified_bool_type() const // never throws
+{
+return px == 0? 0: unspecified_bool;
+}
+#elif \
+( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
+( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) )
+typedef T * (this_type::*unspecified_bool_type)() const;
+operator unspecified_bool_type() const // never throws
+{
+return px == 0? 0: &this_type::get;
+}
+#else
+typedef T * this_type::*unspecified_bool_type;
+operator unspecified_bool_type() const // never throws
+{
+return px == 0? 0: &this_type::px;
+}
+#endif
+// operator! is redundant, but some compilers need it
+bool operator! () const // never throws
+{
+return px == 0;
+}
+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(std::type_info const & ti) const
+{
+return pn.get_deleter(ti);
+}
+// 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(__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
+// get_deleter (experimental)
+#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(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(typeid(D)));
+}
+#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_SHARED_PTR_HPP_INCLUDED