1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/epoc32/include/stdapis/boost/shared_ptr.hpp Tue Mar 16 16:12:26 2010 +0000
1.3 @@ -0,0 +1,558 @@
1.4 +#ifndef BOOST_SHARED_PTR_HPP_INCLUDED
1.5 +#define BOOST_SHARED_PTR_HPP_INCLUDED
1.6 +
1.7 +//
1.8 +// shared_ptr.hpp
1.9 +//
1.10 +// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
1.11 +// Copyright (c) 2001-2006 Peter Dimov
1.12 +//
1.13 +// Distributed under the Boost Software License, Version 1.0. (See
1.14 +// accompanying file LICENSE_1_0.txt or copy at
1.15 +// http://www.boost.org/LICENSE_1_0.txt)
1.16 +//
1.17 +// See http://www.boost.org/libs/smart_ptr/shared_ptr.htm for documentation.
1.18 +//
1.19 +
1.20 +#include <boost/config.hpp> // for broken compiler workarounds
1.21 +
1.22 +#if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
1.23 +#include <boost/detail/shared_ptr_nmt.hpp>
1.24 +#else
1.25 +
1.26 +#include <memory> // for std::auto_ptr
1.27 +
1.28 +#include <boost/assert.hpp>
1.29 +#include <boost/checked_delete.hpp>
1.30 +#include <boost/throw_exception.hpp>
1.31 +#include <boost/detail/shared_count.hpp>
1.32 +#include <boost/detail/workaround.hpp>
1.33 +
1.34 +#include <algorithm> // for std::swap
1.35 +#include <functional> // for std::less
1.36 +#include <typeinfo> // for std::bad_cast
1.37 +#include <iosfwd> // for std::basic_ostream
1.38 +
1.39 +#ifdef BOOST_MSVC // moved here to work around VC++ compiler crash
1.40 +# pragma warning(push)
1.41 +# pragma warning(disable:4284) // odd return type for operator->
1.42 +#endif
1.43 +
1.44 +namespace boost
1.45 +{
1.46 +
1.47 +template<class T> class weak_ptr;
1.48 +template<class T> class enable_shared_from_this;
1.49 +
1.50 +namespace detail
1.51 +{
1.52 +
1.53 +struct static_cast_tag {};
1.54 +struct const_cast_tag {};
1.55 +struct dynamic_cast_tag {};
1.56 +struct polymorphic_cast_tag {};
1.57 +
1.58 +template<class T> struct shared_ptr_traits
1.59 +{
1.60 + typedef T & reference;
1.61 +};
1.62 +
1.63 +template<> struct shared_ptr_traits<void>
1.64 +{
1.65 + typedef void reference;
1.66 +};
1.67 +
1.68 +#if !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
1.69 +
1.70 +template<> struct shared_ptr_traits<void const>
1.71 +{
1.72 + typedef void reference;
1.73 +};
1.74 +
1.75 +template<> struct shared_ptr_traits<void volatile>
1.76 +{
1.77 + typedef void reference;
1.78 +};
1.79 +
1.80 +template<> struct shared_ptr_traits<void const volatile>
1.81 +{
1.82 + typedef void reference;
1.83 +};
1.84 +
1.85 +#endif
1.86 +
1.87 +// enable_shared_from_this support
1.88 +
1.89 +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 )
1.90 +{
1.91 + if(pe != 0) pe->_internal_weak_this._internal_assign(const_cast<Y*>(px), pn);
1.92 +}
1.93 +
1.94 +#ifdef sgi
1.95 +// Turn off: the last argument of the varargs function "sp_enable_shared_from_this" is unnamed
1.96 +# pragma set woff 3506
1.97 +#endif
1.98 +
1.99 +inline void sp_enable_shared_from_this( shared_count const & /*pn*/, ... )
1.100 +{
1.101 +}
1.102 +
1.103 +#ifdef sgi
1.104 +# pragma reset woff 3506
1.105 +#endif
1.106 +
1.107 +#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined( BOOST_NO_AUTO_PTR )
1.108 +
1.109 +// rvalue auto_ptr support based on a technique by Dave Abrahams
1.110 +
1.111 +template< class T, class R > struct sp_enable_if_auto_ptr
1.112 +{
1.113 +};
1.114 +
1.115 +template< class T, class R > struct sp_enable_if_auto_ptr< std::auto_ptr< T >, R >
1.116 +{
1.117 + typedef R type;
1.118 +};
1.119 +
1.120 +#endif
1.121 +
1.122 +} // namespace detail
1.123 +
1.124 +
1.125 +//
1.126 +// shared_ptr
1.127 +//
1.128 +// An enhanced relative of scoped_ptr with reference counted copy semantics.
1.129 +// The object pointed to is deleted when the last shared_ptr pointing to it
1.130 +// is destroyed or reset.
1.131 +//
1.132 +
1.133 +template<class T> class shared_ptr
1.134 +{
1.135 +private:
1.136 +
1.137 + // Borland 5.5.1 specific workaround
1.138 + typedef shared_ptr<T> this_type;
1.139 +
1.140 +public:
1.141 +
1.142 + typedef T element_type;
1.143 + typedef T value_type;
1.144 + typedef T * pointer;
1.145 + typedef typename boost::detail::shared_ptr_traits<T>::reference reference;
1.146 +
1.147 + shared_ptr(): px(0), pn() // never throws in 1.30+
1.148 + {
1.149 + }
1.150 +
1.151 + template<class Y>
1.152 + explicit shared_ptr( Y * p ): px( p ), pn( p ) // Y must be complete
1.153 + {
1.154 + boost::detail::sp_enable_shared_from_this( pn, p, p );
1.155 + }
1.156 +
1.157 + //
1.158 + // Requirements: D's copy constructor must not throw
1.159 + //
1.160 + // shared_ptr will release p by calling d(p)
1.161 + //
1.162 +
1.163 + template<class Y, class D> shared_ptr(Y * p, D d): px(p), pn(p, d)
1.164 + {
1.165 + boost::detail::sp_enable_shared_from_this( pn, p, p );
1.166 + }
1.167 +
1.168 + // As above, but with allocator. A's copy constructor shall not throw.
1.169 +
1.170 + template<class Y, class D, class A> shared_ptr( Y * p, D d, A a ): px( p ), pn( p, d, a )
1.171 + {
1.172 + boost::detail::sp_enable_shared_from_this( pn, p, p );
1.173 + }
1.174 +
1.175 +// generated copy constructor, assignment, destructor are fine...
1.176 +
1.177 +// except that Borland C++ has a bug, and g++ with -Wsynth warns
1.178 +#if defined(__BORLANDC__) || defined(__GNUC__)
1.179 +
1.180 + shared_ptr & operator=(shared_ptr const & r) // never throws
1.181 + {
1.182 + px = r.px;
1.183 + pn = r.pn; // shared_count::op= doesn't throw
1.184 + return *this;
1.185 + }
1.186 +
1.187 +#endif
1.188 +
1.189 + template<class Y>
1.190 + explicit shared_ptr(weak_ptr<Y> const & r): pn(r.pn) // may throw
1.191 + {
1.192 + // it is now safe to copy r.px, as pn(r.pn) did not throw
1.193 + px = r.px;
1.194 + }
1.195 +
1.196 + template<class Y>
1.197 + shared_ptr(shared_ptr<Y> const & r): px(r.px), pn(r.pn) // never throws
1.198 + {
1.199 + }
1.200 +
1.201 + template<class Y>
1.202 + shared_ptr(shared_ptr<Y> const & r, boost::detail::static_cast_tag): px(static_cast<element_type *>(r.px)), pn(r.pn)
1.203 + {
1.204 + }
1.205 +
1.206 + template<class Y>
1.207 + shared_ptr(shared_ptr<Y> const & r, boost::detail::const_cast_tag): px(const_cast<element_type *>(r.px)), pn(r.pn)
1.208 + {
1.209 + }
1.210 +
1.211 + template<class Y>
1.212 + shared_ptr(shared_ptr<Y> const & r, boost::detail::dynamic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
1.213 + {
1.214 + if(px == 0) // need to allocate new counter -- the cast failed
1.215 + {
1.216 + pn = boost::detail::shared_count();
1.217 + }
1.218 + }
1.219 +
1.220 + template<class Y>
1.221 + shared_ptr(shared_ptr<Y> const & r, boost::detail::polymorphic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
1.222 + {
1.223 + if(px == 0)
1.224 + {
1.225 + boost::throw_exception(std::bad_cast());
1.226 + }
1.227 + }
1.228 +
1.229 +#ifndef BOOST_NO_AUTO_PTR
1.230 +
1.231 + template<class Y>
1.232 + explicit shared_ptr(std::auto_ptr<Y> & r): px(r.get()), pn()
1.233 + {
1.234 + Y * tmp = r.get();
1.235 + pn = boost::detail::shared_count(r);
1.236 + boost::detail::sp_enable_shared_from_this( pn, tmp, tmp );
1.237 + }
1.238 +
1.239 +#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
1.240 +
1.241 + template<class Ap>
1.242 + explicit shared_ptr( Ap r, typename boost::detail::sp_enable_if_auto_ptr<Ap, int>::type = 0 ): px( r.get() ), pn()
1.243 + {
1.244 + typename Ap::element_type * tmp = r.get();
1.245 + pn = boost::detail::shared_count( r );
1.246 + boost::detail::sp_enable_shared_from_this( pn, tmp, tmp );
1.247 + }
1.248 +
1.249 +
1.250 +#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
1.251 +
1.252 +#endif // BOOST_NO_AUTO_PTR
1.253 +
1.254 +#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1300)
1.255 +
1.256 + template<class Y>
1.257 + shared_ptr & operator=(shared_ptr<Y> const & r) // never throws
1.258 + {
1.259 + px = r.px;
1.260 + pn = r.pn; // shared_count::op= doesn't throw
1.261 + return *this;
1.262 + }
1.263 +
1.264 +#endif
1.265 +
1.266 +#ifndef BOOST_NO_AUTO_PTR
1.267 +
1.268 + template<class Y>
1.269 + shared_ptr & operator=( std::auto_ptr<Y> & r )
1.270 + {
1.271 + this_type(r).swap(*this);
1.272 + return *this;
1.273 + }
1.274 +
1.275 +#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
1.276 +
1.277 + template<class Ap>
1.278 + typename boost::detail::sp_enable_if_auto_ptr< Ap, shared_ptr & >::type operator=( Ap r )
1.279 + {
1.280 + this_type( r ).swap( *this );
1.281 + return *this;
1.282 + }
1.283 +
1.284 +
1.285 +#endif // BOOST_NO_SFINAE, BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
1.286 +
1.287 +#endif // BOOST_NO_AUTO_PTR
1.288 +
1.289 + void reset() // never throws in 1.30+
1.290 + {
1.291 + this_type().swap(*this);
1.292 + }
1.293 +
1.294 + template<class Y> void reset(Y * p) // Y must be complete
1.295 + {
1.296 + BOOST_ASSERT(p == 0 || p != px); // catch self-reset errors
1.297 + this_type(p).swap(*this);
1.298 + }
1.299 +
1.300 + template<class Y, class D> void reset( Y * p, D d )
1.301 + {
1.302 + this_type( p, d ).swap( *this );
1.303 + }
1.304 +
1.305 + template<class Y, class D, class A> void reset( Y * p, D d, A a )
1.306 + {
1.307 + this_type( p, d, a ).swap( *this );
1.308 + }
1.309 +
1.310 + reference operator* () const // never throws
1.311 + {
1.312 + BOOST_ASSERT(px != 0);
1.313 + return *px;
1.314 + }
1.315 +
1.316 + T * operator-> () const // never throws
1.317 + {
1.318 + BOOST_ASSERT(px != 0);
1.319 + return px;
1.320 + }
1.321 +
1.322 + T * get() const // never throws
1.323 + {
1.324 + return px;
1.325 + }
1.326 +
1.327 + // implicit conversion to "bool"
1.328 +
1.329 +#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x580)
1.330 +
1.331 + operator bool () const
1.332 + {
1.333 + return px != 0;
1.334 + }
1.335 +
1.336 +#elif defined( _MANAGED )
1.337 +
1.338 + static void unspecified_bool( this_type*** )
1.339 + {
1.340 + }
1.341 +
1.342 + typedef void (*unspecified_bool_type)( this_type*** );
1.343 +
1.344 + operator unspecified_bool_type() const // never throws
1.345 + {
1.346 + return px == 0? 0: unspecified_bool;
1.347 + }
1.348 +
1.349 +#elif \
1.350 + ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
1.351 + ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) )
1.352 +
1.353 + typedef T * (this_type::*unspecified_bool_type)() const;
1.354 +
1.355 + operator unspecified_bool_type() const // never throws
1.356 + {
1.357 + return px == 0? 0: &this_type::get;
1.358 + }
1.359 +
1.360 +#else
1.361 +
1.362 + typedef T * this_type::*unspecified_bool_type;
1.363 +
1.364 + operator unspecified_bool_type() const // never throws
1.365 + {
1.366 + return px == 0? 0: &this_type::px;
1.367 + }
1.368 +
1.369 +#endif
1.370 +
1.371 + // operator! is redundant, but some compilers need it
1.372 +
1.373 + bool operator! () const // never throws
1.374 + {
1.375 + return px == 0;
1.376 + }
1.377 +
1.378 + bool unique() const // never throws
1.379 + {
1.380 + return pn.unique();
1.381 + }
1.382 +
1.383 + long use_count() const // never throws
1.384 + {
1.385 + return pn.use_count();
1.386 + }
1.387 +
1.388 + void swap(shared_ptr<T> & other) // never throws
1.389 + {
1.390 + std::swap(px, other.px);
1.391 + pn.swap(other.pn);
1.392 + }
1.393 +
1.394 + template<class Y> bool _internal_less(shared_ptr<Y> const & rhs) const
1.395 + {
1.396 + return pn < rhs.pn;
1.397 + }
1.398 +
1.399 + void * _internal_get_deleter(std::type_info const & ti) const
1.400 + {
1.401 + return pn.get_deleter(ti);
1.402 + }
1.403 +
1.404 +// Tasteless as this may seem, making all members public allows member templates
1.405 +// to work in the absence of member template friends. (Matthew Langston)
1.406 +
1.407 +#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
1.408 +
1.409 +private:
1.410 +
1.411 + template<class Y> friend class shared_ptr;
1.412 + template<class Y> friend class weak_ptr;
1.413 +
1.414 +
1.415 +#endif
1.416 +
1.417 + T * px; // contained pointer
1.418 + boost::detail::shared_count pn; // reference counter
1.419 +
1.420 +}; // shared_ptr
1.421 +
1.422 +template<class T, class U> inline bool operator==(shared_ptr<T> const & a, shared_ptr<U> const & b)
1.423 +{
1.424 + return a.get() == b.get();
1.425 +}
1.426 +
1.427 +template<class T, class U> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<U> const & b)
1.428 +{
1.429 + return a.get() != b.get();
1.430 +}
1.431 +
1.432 +#if __GNUC__ == 2 && __GNUC_MINOR__ <= 96
1.433 +
1.434 +// Resolve the ambiguity between our op!= and the one in rel_ops
1.435 +
1.436 +template<class T> inline bool operator!=(shared_ptr<T> const & a, shared_ptr<T> const & b)
1.437 +{
1.438 + return a.get() != b.get();
1.439 +}
1.440 +
1.441 +#endif
1.442 +
1.443 +template<class T, class U> inline bool operator<(shared_ptr<T> const & a, shared_ptr<U> const & b)
1.444 +{
1.445 + return a._internal_less(b);
1.446 +}
1.447 +
1.448 +template<class T> inline void swap(shared_ptr<T> & a, shared_ptr<T> & b)
1.449 +{
1.450 + a.swap(b);
1.451 +}
1.452 +
1.453 +template<class T, class U> shared_ptr<T> static_pointer_cast(shared_ptr<U> const & r)
1.454 +{
1.455 + return shared_ptr<T>(r, boost::detail::static_cast_tag());
1.456 +}
1.457 +
1.458 +template<class T, class U> shared_ptr<T> const_pointer_cast(shared_ptr<U> const & r)
1.459 +{
1.460 + return shared_ptr<T>(r, boost::detail::const_cast_tag());
1.461 +}
1.462 +
1.463 +template<class T, class U> shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const & r)
1.464 +{
1.465 + return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
1.466 +}
1.467 +
1.468 +// shared_*_cast names are deprecated. Use *_pointer_cast instead.
1.469 +
1.470 +template<class T, class U> shared_ptr<T> shared_static_cast(shared_ptr<U> const & r)
1.471 +{
1.472 + return shared_ptr<T>(r, boost::detail::static_cast_tag());
1.473 +}
1.474 +
1.475 +template<class T, class U> shared_ptr<T> shared_dynamic_cast(shared_ptr<U> const & r)
1.476 +{
1.477 + return shared_ptr<T>(r, boost::detail::dynamic_cast_tag());
1.478 +}
1.479 +
1.480 +template<class T, class U> shared_ptr<T> shared_polymorphic_cast(shared_ptr<U> const & r)
1.481 +{
1.482 + return shared_ptr<T>(r, boost::detail::polymorphic_cast_tag());
1.483 +}
1.484 +
1.485 +template<class T, class U> shared_ptr<T> shared_polymorphic_downcast(shared_ptr<U> const & r)
1.486 +{
1.487 + BOOST_ASSERT(dynamic_cast<T *>(r.get()) == r.get());
1.488 + return shared_static_cast<T>(r);
1.489 +}
1.490 +
1.491 +// get_pointer() enables boost::mem_fn to recognize shared_ptr
1.492 +
1.493 +template<class T> inline T * get_pointer(shared_ptr<T> const & p)
1.494 +{
1.495 + return p.get();
1.496 +}
1.497 +
1.498 +// operator<<
1.499 +
1.500 +#if defined(__GNUC__) && (__GNUC__ < 3)
1.501 +
1.502 +template<class Y> std::ostream & operator<< (std::ostream & os, shared_ptr<Y> const & p)
1.503 +{
1.504 + os << p.get();
1.505 + return os;
1.506 +}
1.507 +
1.508 +#else
1.509 +
1.510 +// in STLport's no-iostreams mode no iostream symbols can be used
1.511 +#ifndef _STLP_NO_IOSTREAMS
1.512 +
1.513 +# if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)
1.514 +// MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL
1.515 +using std::basic_ostream;
1.516 +template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, shared_ptr<Y> const & p)
1.517 +# else
1.518 +template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, shared_ptr<Y> const & p)
1.519 +# endif
1.520 +{
1.521 + os << p.get();
1.522 + return os;
1.523 +}
1.524 +
1.525 +#endif // _STLP_NO_IOSTREAMS
1.526 +
1.527 +#endif // __GNUC__ < 3
1.528 +
1.529 +// get_deleter (experimental)
1.530 +
1.531 +#if ( defined(__GNUC__) && BOOST_WORKAROUND(__GNUC__, < 3) ) || \
1.532 + ( defined(__EDG_VERSION__) && BOOST_WORKAROUND(__EDG_VERSION__, <= 238) ) || \
1.533 + ( defined(__HP_aCC) && BOOST_WORKAROUND(__HP_aCC, <= 33500) )
1.534 +
1.535 +// g++ 2.9x doesn't allow static_cast<X const *>(void *)
1.536 +// apparently EDG 2.38 and HP aCC A.03.35 also don't accept it
1.537 +
1.538 +template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
1.539 +{
1.540 + void const * q = p._internal_get_deleter(typeid(D));
1.541 + return const_cast<D *>(static_cast<D const *>(q));
1.542 +}
1.543 +
1.544 +#else
1.545 +
1.546 +template<class D, class T> D * get_deleter(shared_ptr<T> const & p)
1.547 +{
1.548 + return static_cast<D *>(p._internal_get_deleter(typeid(D)));
1.549 +}
1.550 +
1.551 +#endif
1.552 +
1.553 +} // namespace boost
1.554 +
1.555 +#ifdef BOOST_MSVC
1.556 +# pragma warning(pop)
1.557 +#endif
1.558 +
1.559 +#endif // #if defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
1.560 +
1.561 +#endif // #ifndef BOOST_SHARED_PTR_HPP_INCLUDED