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