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Add allocate_shared_noinit.

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[SVN r81861]
This commit is contained in:
Peter Dimov
2012-12-11 18:32:24 +00:00
parent fd52dbc411
commit 67f5e9825e
1 changed files with 17 additions and 0 deletions
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17
include/boost/smart_ptr/make_shared_object.hpp
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@ -182,6 +182,23 @@ template< class T, class A > typename boost::detail::sp_if_not_array< T >::type
return boost::shared_ptr< T >( pt, pt2 ); return boost::shared_ptr< T >( pt, pt2 );
} }
template< class T, class A > typename boost::detail::sp_if_not_array< T >::type allocate_shared_noinit( A const & a )
{
boost::shared_ptr< T > pt( static_cast< T* >( 0 ), BOOST_SP_MSD( T ), a );
boost::detail::sp_ms_deleter< T > * pd = static_cast<boost::detail::sp_ms_deleter< T > *>( pt._internal_get_untyped_deleter() );
void * pv = pd->address();
::new( pv ) T;
pd->set_initialized();
T * pt2 = static_cast< T* >( pv );
boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
return boost::shared_ptr< T >( pt, pt2 );
}
#if defined( BOOST_HAS_VARIADIC_TMPL ) && defined( BOOST_HAS_RVALUE_REFS ) #if defined( BOOST_HAS_VARIADIC_TMPL ) && defined( BOOST_HAS_RVALUE_REFS )
// Variadic templates, rvalue reference // Variadic templates, rvalue reference