| #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 |