diff -r 000000000000 -r e4d67989cc36 ossrv_pub/boost_apis/boost/shared_ptr.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ossrv_pub/boost_apis/boost/shared_ptr.hpp Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,558 @@ +#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 // for broken compiler workarounds + +#if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) +#include +#else + +#include // for std::auto_ptr + +#include +#include +#include +#include +#include + +#include // for std::swap +#include // for std::less +#include // for std::bad_cast +#include // 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 weak_ptr; +template class enable_shared_from_this; + +namespace detail +{ + +struct static_cast_tag {}; +struct const_cast_tag {}; +struct dynamic_cast_tag {}; +struct polymorphic_cast_tag {}; + +template struct shared_ptr_traits +{ + typedef T & reference; +}; + +template<> struct shared_ptr_traits +{ + typedef void reference; +}; + +#if !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS) + +template<> struct shared_ptr_traits +{ + typedef void reference; +}; + +template<> struct shared_ptr_traits +{ + typedef void reference; +}; + +template<> struct shared_ptr_traits +{ + typedef void reference; +}; + +#endif + +// enable_shared_from_this support + +template void sp_enable_shared_from_this( shared_count const & pn, boost::enable_shared_from_this const * pe, Y const * px ) +{ + if(pe != 0) pe->_internal_weak_this._internal_assign(const_cast(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 shared_ptr +{ +private: + + // Borland 5.5.1 specific workaround + typedef shared_ptr this_type; + +public: + + typedef T element_type; + typedef T value_type; + typedef T * pointer; + typedef typename boost::detail::shared_ptr_traits::reference reference; + + shared_ptr(): px(0), pn() // never throws in 1.30+ + { + } + + template + 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 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 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 + explicit shared_ptr(weak_ptr 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 + shared_ptr(shared_ptr const & r): px(r.px), pn(r.pn) // never throws + { + } + + template + shared_ptr(shared_ptr const & r, boost::detail::static_cast_tag): px(static_cast(r.px)), pn(r.pn) + { + } + + template + shared_ptr(shared_ptr const & r, boost::detail::const_cast_tag): px(const_cast(r.px)), pn(r.pn) + { + } + + template + shared_ptr(shared_ptr const & r, boost::detail::dynamic_cast_tag): px(dynamic_cast(r.px)), pn(r.pn) + { + if(px == 0) // need to allocate new counter -- the cast failed + { + pn = boost::detail::shared_count(); + } + } + + template + shared_ptr(shared_ptr const & r, boost::detail::polymorphic_cast_tag): px(dynamic_cast(r.px)), pn(r.pn) + { + if(px == 0) + { + boost::throw_exception(std::bad_cast()); + } + } + +#ifndef BOOST_NO_AUTO_PTR + + template + explicit shared_ptr(std::auto_ptr & 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 + explicit shared_ptr( Ap r, typename boost::detail::sp_enable_if_auto_ptr::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 + shared_ptr & operator=(shared_ptr 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 + shared_ptr & operator=( std::auto_ptr & r ) + { + this_type(r).swap(*this); + return *this; + } + +#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) + + template + 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 void reset(Y * p) // Y must be complete + { + BOOST_ASSERT(p == 0 || p != px); // catch self-reset errors + this_type(p).swap(*this); + } + + template void reset( Y * p, D d ) + { + this_type( p, d ).swap( *this ); + } + + template 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 & other) // never throws + { + std::swap(px, other.px); + pn.swap(other.pn); + } + + template bool _internal_less(shared_ptr 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 friend class shared_ptr; + template friend class weak_ptr; + + +#endif + + T * px; // contained pointer + boost::detail::shared_count pn; // reference counter + +}; // shared_ptr + +template inline bool operator==(shared_ptr const & a, shared_ptr const & b) +{ + return a.get() == b.get(); +} + +template inline bool operator!=(shared_ptr const & a, shared_ptr 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 inline bool operator!=(shared_ptr const & a, shared_ptr const & b) +{ + return a.get() != b.get(); +} + +#endif + +template inline bool operator<(shared_ptr const & a, shared_ptr const & b) +{ + return a._internal_less(b); +} + +template inline void swap(shared_ptr & a, shared_ptr & b) +{ + a.swap(b); +} + +template shared_ptr static_pointer_cast(shared_ptr const & r) +{ + return shared_ptr(r, boost::detail::static_cast_tag()); +} + +template shared_ptr const_pointer_cast(shared_ptr const & r) +{ + return shared_ptr(r, boost::detail::const_cast_tag()); +} + +template shared_ptr dynamic_pointer_cast(shared_ptr const & r) +{ + return shared_ptr(r, boost::detail::dynamic_cast_tag()); +} + +// shared_*_cast names are deprecated. Use *_pointer_cast instead. + +template shared_ptr shared_static_cast(shared_ptr const & r) +{ + return shared_ptr(r, boost::detail::static_cast_tag()); +} + +template shared_ptr shared_dynamic_cast(shared_ptr const & r) +{ + return shared_ptr(r, boost::detail::dynamic_cast_tag()); +} + +template shared_ptr shared_polymorphic_cast(shared_ptr const & r) +{ + return shared_ptr(r, boost::detail::polymorphic_cast_tag()); +} + +template shared_ptr shared_polymorphic_downcast(shared_ptr const & r) +{ + BOOST_ASSERT(dynamic_cast(r.get()) == r.get()); + return shared_static_cast(r); +} + +// get_pointer() enables boost::mem_fn to recognize shared_ptr + +template inline T * get_pointer(shared_ptr const & p) +{ + return p.get(); +} + +// operator<< + +#if defined(__GNUC__) && (__GNUC__ < 3) + +template std::ostream & operator<< (std::ostream & os, shared_ptr 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 basic_ostream & operator<< (basic_ostream & os, shared_ptr const & p) +# else +template std::basic_ostream & operator<< (std::basic_ostream & os, shared_ptr 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(void *) +// apparently EDG 2.38 and HP aCC A.03.35 also don't accept it + +template D * get_deleter(shared_ptr const & p) +{ + void const * q = p._internal_get_deleter(typeid(D)); + return const_cast(static_cast(q)); +} + +#else + +template D * get_deleter(shared_ptr const & p) +{ + return static_cast(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