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sp_accept_owner added.

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[SVN r44353]
This commit is contained in:
Peter Dimov
2008-04-12 18:22:18 +00:00
parent f85a1bf406
commit 4094c23537
5 changed files with 207 additions and 59 deletions
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91
include/boost/shared_ptr.hpp
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@@ -50,7 +50,6 @@ namespace boost
template<class T> class shared_ptr;
template<class T> class weak_ptr;
template<class T> class enable_shared_from_this;
namespace detail
{
@@ -89,48 +88,6 @@ template<> struct shared_ptr_traits<void const volatile>
#endif
// enable_shared_from_this support
struct ignore_enable_shared_from_this_tag {};
template<class T, class Y> void sp_enable_shared_from_this( boost::shared_ptr<Y> * ptr, boost::enable_shared_from_this<T> const * pe )
{
if(pe != 0)
{
pe->_internal_accept_owner(*ptr);
}
}
#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 )
{
}
#else // _MANAGED
#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( ... )
{
}
#ifdef sgi
# pragma reset woff 3506
#endif
#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
@@ -148,6 +105,32 @@ template< class T, class R > struct sp_enable_if_auto_ptr< std::auto_ptr< T >, R
} // namespace detail
// sp_accept_owner
#ifdef _MANAGED
// Avoid C4793, ... causes native code generation
struct sp_any_pointer
{
template<class T> sp_any_pointer( T* ) {}
};
inline void sp_accept_owner( sp_any_pointer, sp_any_pointer )
{
}
inline void sp_accept_owner( sp_any_pointer, sp_any_pointer, sp_any_pointer )
{
}
#else // _MANAGED
inline void sp_accept_owner( ... )
{
}
#endif // _MANAGED
//
// shared_ptr
@@ -178,7 +161,7 @@ public:
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 );
sp_accept_owner( this, p );
}
//
@@ -187,16 +170,18 @@ 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 );
D * pd = static_cast<D *>( pn.get_deleter( BOOST_SP_TYPEID(D) ) );
sp_accept_owner( this, p, pd );
}
// 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 );
D * pd = static_cast<D *>( pn.get_deleter( BOOST_SP_TYPEID(D) ) );
sp_accept_owner( this, p, pd );
}
// generated copy constructor, assignment, destructor are fine...
@@ -268,12 +253,6 @@ public:
}
}
// constructor that doesn't trigger enable_shared_from_this code, needed
// for enable_shared_from_this internal implementation
template<class Y, class D> shared_ptr(Y * p, D d, detail::ignore_enable_shared_from_this_tag):
px(p), pn(p, d)
{}
#ifndef BOOST_NO_AUTO_PTR
template<class Y>
@@ -281,7 +260,8 @@ public:
{
Y * tmp = r.get();
pn = boost::detail::shared_count(r);
boost::detail::sp_enable_shared_from_this( this, tmp );
sp_accept_owner( this, tmp );
}
#if !defined( BOOST_NO_SFINAE ) && !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION )
@@ -291,7 +271,8 @@ public:
{
typename Ap::element_type * tmp = r.get();
pn = boost::detail::shared_count( r );
boost::detail::sp_enable_shared_from_this( this, tmp );
sp_accept_owner( this, tmp );
}