#ifndef BOOST_SMART_PTR_MAKE_SHARED_HPP_INCLUDED #define BOOST_SMART_PTR_MAKE_SHARED_HPP_INCLUDED // make_shared.hpp // // Copyright (c) 2007, 2008 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/make_shared.html // for documentation. #include <boost/config.hpp> #include <boost/smart_ptr/shared_ptr.hpp> #include <boost/type_traits/type_with_alignment.hpp> #include <boost/type_traits/alignment_of.hpp> #include <cstddef> #include <new> namespace boost { namespace detail { template< std::size_t N, std::size_t A > struct sp_aligned_storage { union type { char data_[ N ]; typename boost::type_with_alignment< A >::type align_; }; }; template< class T > class sp_ms_deleter { private: typedef typename sp_aligned_storage< sizeof( T ), ::boost::alignment_of< T >::value >::type storage_type; bool initialized_; storage_type storage_; private: void destroy() { if( initialized_ ) { reinterpret_cast< T* >( storage_.data_ )->~T(); initialized_ = false; } } public: sp_ms_deleter(): initialized_( false ) { } // optimization: do not copy storage_ sp_ms_deleter( sp_ms_deleter const & ): initialized_( false ) { } ~sp_ms_deleter() { destroy(); } void operator()( T * ) { destroy(); } void * address() { return storage_.data_; } void set_initialized() { initialized_ = true; } }; #if defined( BOOST_HAS_RVALUE_REFS ) template< class T > T&& sp_forward( T & t ) { return static_cast< T&& >( t ); } #endif } // namespace detail // Zero-argument versions // // Used even when variadic templates are available because of the new T() vs new T issue template< class T > boost::shared_ptr< T > make_shared() { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); 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 ); } template< class T, class A > boost::shared_ptr< T > allocate_shared( A const & a ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); 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 ) // Variadic templates, rvalue reference template< class T, class Arg1, class... Args > boost::shared_ptr< T > make_shared( Arg1 && arg1, Args && ... args ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( boost::detail::sp_forward<Arg1>( arg1 ), boost::detail::sp_forward<Args>( args )... ); 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 ); } template< class T, class A, class Arg1, class... Args > boost::shared_ptr< T > allocate_shared( A const & a, Arg1 && arg1, Args && ... args ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( boost::detail::sp_forward<Arg1>( arg1 ), boost::detail::sp_forward<Args>( args )... ); 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 ); } #else // C++03 version template< class T, class A1 > boost::shared_ptr< T > make_shared( A1 const & a1 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1 ); 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 ); } template< class T, class A, class A1 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1 ); 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 ); } template< class T, class A1, class A2 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2 ); 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 ); } template< class T, class A, class A1, class A2 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2 ); 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 ); } template< class T, class A1, class A2, class A3 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3 ); 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 ); } template< class T, class A, class A1, class A2, class A3 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3 ); 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 ); } template< class T, class A1, class A2, class A3, class A4 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4 ); 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 ); } template< class T, class A, class A1, class A2, class A3, class A4 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4 ); 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 ); } template< class T, class A1, class A2, class A3, class A4, class A5 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5 ); 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 ); } template< class T, class A, class A1, class A2, class A3, class A4, class A5 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5 ); 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 ); } template< class T, class A1, class A2, class A3, class A4, class A5, class A6 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6 ); 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 ); } template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6 ); 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 ); } template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7 ); 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 ); } template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7 ); 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 ); } template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8 ); 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 ); } template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8 ); 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 ); } template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9 > boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8, A9 const & a9 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >() ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8, a9 ); 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 ); } template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9 > boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6, A7 const & a7, A8 const & a8, A9 const & a9 ) { boost::shared_ptr< T > pt( static_cast< T* >( 0 ), boost::detail::sp_ms_deleter< T >(), a ); boost::detail::sp_ms_deleter< T > * pd = boost::get_deleter< boost::detail::sp_ms_deleter< T > >( pt ); void * pv = pd->address(); ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8, a9 ); 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 ); } #endif } // namespace boost #endif // #ifndef BOOST_SMART_PTR_MAKE_SHARED_HPP_INCLUDED