1 #ifndef BOOST_SMART_PTR_MAKE_SHARED_HPP_INCLUDED
2 #define BOOST_SMART_PTR_MAKE_SHARED_HPP_INCLUDED
6 // Copyright (c) 2007, 2008 Peter Dimov
8 // Distributed under the Boost Software License, Version 1.0.
9 // See accompanying file LICENSE_1_0.txt or copy at
10 // http://www.boost.org/LICENSE_1_0.txt
12 // See http://www.boost.org/libs/smart_ptr/make_shared.html
15 #include <boost/config.hpp>
16 #include <boost/smart_ptr/shared_ptr.hpp>
17 #include <boost/type_traits/type_with_alignment.hpp>
18 #include <boost/type_traits/alignment_of.hpp>
28 template< std::size_t N, std::size_t A > struct sp_aligned_storage
33 typename boost::type_with_alignment< A >::type align_;
37 template< class T > class sp_ms_deleter
41 typedef typename sp_aligned_storage< sizeof( T ), ::boost::alignment_of< T >::value >::type storage_type;
44 storage_type storage_;
52 reinterpret_cast< T* >( storage_.data_ )->~T();
59 sp_ms_deleter(): initialized_( false )
63 // optimization: do not copy storage_
64 sp_ms_deleter( sp_ms_deleter const & ): initialized_( false )
73 void operator()( T * )
80 return storage_.data_;
83 void set_initialized()
89 #if defined( BOOST_HAS_RVALUE_REFS )
90 template< class T > T&& forward( T &&t )
98 // Zero-argument versions
100 // Used even when variadic templates are available because of the new T() vs new T issue
102 template< class T > boost::shared_ptr< T > make_shared()
104 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
106 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
108 void * pv = pd->address();
111 pd->set_initialized();
113 T * pt2 = static_cast< T* >( pv );
115 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
116 return boost::shared_ptr< T >( pt, pt2 );
119 template< class T, class A > boost::shared_ptr< T > allocate_shared( A const & a )
121 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
123 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
125 void * pv = pd->address();
128 pd->set_initialized();
130 T * pt2 = static_cast< T* >( pv );
132 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
133 return boost::shared_ptr< T >( pt, pt2 );
136 #if defined( BOOST_HAS_VARIADIC_TMPL ) && defined( BOOST_HAS_RVALUE_REFS )
138 // Variadic templates, rvalue reference
140 template< class T, class... Args > boost::shared_ptr< T > make_shared( Args && ... args )
142 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
144 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
146 void * pv = pd->address();
148 ::new( pv ) T( detail::forward<Args>( args )... );
149 pd->set_initialized();
151 T * pt2 = static_cast< T* >( pv );
153 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
154 return boost::shared_ptr< T >( pt, pt2 );
157 template< class T, class A, class... Args > boost::shared_ptr< T > allocate_shared( A const & a, Args && ... args )
159 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
161 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
163 void * pv = pd->address();
165 ::new( pv ) T( detail::forward<Args>( args )... );
166 pd->set_initialized();
168 T * pt2 = static_cast< T* >( pv );
170 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
171 return boost::shared_ptr< T >( pt, pt2 );
178 template< class T, class A1 >
179 boost::shared_ptr< T > make_shared( A1 const & a1 )
181 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
183 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
185 void * pv = pd->address();
188 pd->set_initialized();
190 T * pt2 = static_cast< T* >( pv );
192 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
193 return boost::shared_ptr< T >( pt, pt2 );
196 template< class T, class A, class A1 >
197 boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1 )
199 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
201 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
203 void * pv = pd->address();
206 pd->set_initialized();
208 T * pt2 = static_cast< T* >( pv );
210 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
211 return boost::shared_ptr< T >( pt, pt2 );
214 template< class T, class A1, class A2 >
215 boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2 )
217 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
219 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
221 void * pv = pd->address();
223 ::new( pv ) T( a1, a2 );
224 pd->set_initialized();
226 T * pt2 = static_cast< T* >( pv );
228 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
229 return boost::shared_ptr< T >( pt, pt2 );
232 template< class T, class A, class A1, class A2 >
233 boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2 )
235 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
237 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
239 void * pv = pd->address();
241 ::new( pv ) T( a1, a2 );
242 pd->set_initialized();
244 T * pt2 = static_cast< T* >( pv );
246 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
247 return boost::shared_ptr< T >( pt, pt2 );
250 template< class T, class A1, class A2, class A3 >
251 boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3 )
253 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
255 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
257 void * pv = pd->address();
259 ::new( pv ) T( a1, a2, a3 );
260 pd->set_initialized();
262 T * pt2 = static_cast< T* >( pv );
264 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
265 return boost::shared_ptr< T >( pt, pt2 );
268 template< class T, class A, class A1, class A2, class A3 >
269 boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3 )
271 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
273 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
275 void * pv = pd->address();
277 ::new( pv ) T( a1, a2, a3 );
278 pd->set_initialized();
280 T * pt2 = static_cast< T* >( pv );
282 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
283 return boost::shared_ptr< T >( pt, pt2 );
286 template< class T, class A1, class A2, class A3, class A4 >
287 boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4 )
289 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
291 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
293 void * pv = pd->address();
295 ::new( pv ) T( a1, a2, a3, a4 );
296 pd->set_initialized();
298 T * pt2 = static_cast< T* >( pv );
300 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
301 return boost::shared_ptr< T >( pt, pt2 );
304 template< class T, class A, class A1, class A2, class A3, class A4 >
305 boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4 )
307 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
309 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
311 void * pv = pd->address();
313 ::new( pv ) T( a1, a2, a3, a4 );
314 pd->set_initialized();
316 T * pt2 = static_cast< T* >( pv );
318 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
319 return boost::shared_ptr< T >( pt, pt2 );
322 template< class T, class A1, class A2, class A3, class A4, class A5 >
323 boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5 )
325 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
327 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
329 void * pv = pd->address();
331 ::new( pv ) T( a1, a2, a3, a4, a5 );
332 pd->set_initialized();
334 T * pt2 = static_cast< T* >( pv );
336 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
337 return boost::shared_ptr< T >( pt, pt2 );
340 template< class T, class A, class A1, class A2, class A3, class A4, class A5 >
341 boost::shared_ptr< T > allocate_shared( A const & a, A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5 )
343 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
345 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
347 void * pv = pd->address();
349 ::new( pv ) T( a1, a2, a3, a4, a5 );
350 pd->set_initialized();
352 T * pt2 = static_cast< T* >( pv );
354 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
355 return boost::shared_ptr< T >( pt, pt2 );
358 template< class T, class A1, class A2, class A3, class A4, class A5, class A6 >
359 boost::shared_ptr< T > make_shared( A1 const & a1, A2 const & a2, A3 const & a3, A4 const & a4, A5 const & a5, A6 const & a6 )
361 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
363 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
365 void * pv = pd->address();
367 ::new( pv ) T( a1, a2, a3, a4, a5, a6 );
368 pd->set_initialized();
370 T * pt2 = static_cast< T* >( pv );
372 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
373 return boost::shared_ptr< T >( pt, pt2 );
376 template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6 >
377 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 )
379 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
381 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
383 void * pv = pd->address();
385 ::new( pv ) T( a1, a2, a3, a4, a5, a6 );
386 pd->set_initialized();
388 T * pt2 = static_cast< T* >( pv );
390 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
391 return boost::shared_ptr< T >( pt, pt2 );
394 template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7 >
395 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 )
397 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
399 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
401 void * pv = pd->address();
403 ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7 );
404 pd->set_initialized();
406 T * pt2 = static_cast< T* >( pv );
408 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
409 return boost::shared_ptr< T >( pt, pt2 );
412 template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7 >
413 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 )
415 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
417 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
419 void * pv = pd->address();
421 ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7 );
422 pd->set_initialized();
424 T * pt2 = static_cast< T* >( pv );
426 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
427 return boost::shared_ptr< T >( pt, pt2 );
430 template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8 >
431 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 )
433 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
435 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
437 void * pv = pd->address();
439 ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8 );
440 pd->set_initialized();
442 T * pt2 = static_cast< T* >( pv );
444 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
445 return boost::shared_ptr< T >( pt, pt2 );
448 template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8 >
449 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 )
451 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
453 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
455 void * pv = pd->address();
457 ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8 );
458 pd->set_initialized();
460 T * pt2 = static_cast< T* >( pv );
462 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
463 return boost::shared_ptr< T >( pt, pt2 );
466 template< class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9 >
467 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 )
469 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >() );
471 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
473 void * pv = pd->address();
475 ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8, a9 );
476 pd->set_initialized();
478 T * pt2 = static_cast< T* >( pv );
480 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
481 return boost::shared_ptr< T >( pt, pt2 );
484 template< class T, class A, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8, class A9 >
485 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 )
487 boost::shared_ptr< T > pt( static_cast< T* >( 0 ), detail::sp_ms_deleter< T >(), a );
489 detail::sp_ms_deleter< T > * pd = boost::get_deleter< detail::sp_ms_deleter< T > >( pt );
491 void * pv = pd->address();
493 ::new( pv ) T( a1, a2, a3, a4, a5, a6, a7, a8, a9 );
494 pd->set_initialized();
496 T * pt2 = static_cast< T* >( pv );
498 boost::detail::sp_enable_shared_from_this( &pt, pt2, pt2 );
499 return boost::shared_ptr< T >( pt, pt2 );
506 #endif // #ifndef BOOST_SMART_PTR_MAKE_SHARED_HPP_INCLUDED