470 lines
18 KiB
C++
470 lines
18 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTERPROCESS_ADAPTIVE_POOL_HPP
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#define BOOST_INTERPROCESS_ADAPTIVE_POOL_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/interprocess/detail/config_begin.hpp>
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#include <boost/interprocess/detail/workaround.hpp>
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#include <boost/intrusive/pointer_traits.hpp>
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#include <boost/interprocess/interprocess_fwd.hpp>
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#include <boost/assert.hpp>
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#include <boost/utility/addressof.hpp>
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#include <boost/interprocess/detail/utilities.hpp>
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#include <boost/interprocess/detail/type_traits.hpp>
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#include <boost/interprocess/allocators/detail/adaptive_node_pool.hpp>
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#include <boost/interprocess/containers/version_type.hpp>
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#include <boost/interprocess/exceptions.hpp>
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#include <boost/interprocess/allocators/detail/allocator_common.hpp>
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#include <boost/container/detail/multiallocation_chain.hpp>
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#include <boost/interprocess/detail/mpl.hpp>
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#include <boost/move/adl_move_swap.hpp>
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#include <cstddef>
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//!\file
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//!Describes adaptive_pool pooled shared memory STL compatible allocator
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namespace boost {
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namespace interprocess {
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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namespace ipcdetail{
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template < unsigned int Version
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, class T
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, class SegmentManager
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, std::size_t NodesPerBlock
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, std::size_t MaxFreeBlocks
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, unsigned char OverheadPercent
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>
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class adaptive_pool_base
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: public node_pool_allocation_impl
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< adaptive_pool_base
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< Version, T, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent>
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, Version
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, T
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, SegmentManager
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>
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{
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public:
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typedef typename SegmentManager::void_pointer void_pointer;
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typedef SegmentManager segment_manager;
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typedef adaptive_pool_base
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<Version, T, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> self_t;
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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template <int dummy>
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struct node_pool
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{
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typedef ipcdetail::shared_adaptive_node_pool
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< SegmentManager, sizeof_value<T>::value, NodesPerBlock, MaxFreeBlocks, OverheadPercent> type;
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static type *get(void *p)
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{ return static_cast<type*>(p); }
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};
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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BOOST_STATIC_ASSERT((Version <=2));
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public:
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//-------
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typedef typename boost::intrusive::
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pointer_traits<void_pointer>::template
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rebind_pointer<T>::type pointer;
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typedef typename boost::intrusive::
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pointer_traits<void_pointer>::template
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rebind_pointer<const T>::type const_pointer;
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typedef T value_type;
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typedef typename ipcdetail::add_reference
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<value_type>::type reference;
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typedef typename ipcdetail::add_reference
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<const value_type>::type const_reference;
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typedef typename segment_manager::size_type size_type;
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typedef typename segment_manager::difference_type difference_type;
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typedef boost::interprocess::version_type<adaptive_pool_base, Version> version;
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typedef boost::container::dtl::transform_multiallocation_chain
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<typename SegmentManager::multiallocation_chain, T>multiallocation_chain;
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//!Obtains adaptive_pool_base from
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//!adaptive_pool_base
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template<class T2>
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struct rebind
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{
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typedef adaptive_pool_base<Version, T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> other;
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};
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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private:
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//!Not assignable from related adaptive_pool_base
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template<unsigned int Version2, class T2, class SegmentManager2, std::size_t N2, std::size_t F2, unsigned char O2>
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adaptive_pool_base& operator=
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(const adaptive_pool_base<Version2, T2, SegmentManager2, N2, F2, O2>&);
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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public:
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//!Constructor from a segment manager. If not present, constructs a node
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//!pool. Increments the reference count of the associated node pool.
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//!Can throw boost::interprocess::bad_alloc
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adaptive_pool_base(segment_manager *segment_mngr)
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: mp_node_pool(ipcdetail::get_or_create_node_pool<typename node_pool<0>::type>(segment_mngr)) { }
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//!Copy constructor from other adaptive_pool_base. Increments the reference
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//!count of the associated node pool. Never throws
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adaptive_pool_base(const adaptive_pool_base &other)
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: mp_node_pool(other.get_node_pool())
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{
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node_pool<0>::get(ipcdetail::to_raw_pointer(mp_node_pool))->inc_ref_count();
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}
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//!Assignment from other adaptive_pool_base
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adaptive_pool_base& operator=(const adaptive_pool_base &other)
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{
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adaptive_pool_base c(other);
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boost::adl_move_swap(*this, c);
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return *this;
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}
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//!Copy constructor from related adaptive_pool_base. If not present, constructs
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//!a node pool. Increments the reference count of the associated node pool.
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//!Can throw boost::interprocess::bad_alloc
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template<class T2>
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adaptive_pool_base
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(const adaptive_pool_base<Version, T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> &other)
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: mp_node_pool(ipcdetail::get_or_create_node_pool<typename node_pool<0>::type>(other.get_segment_manager())) { }
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//!Destructor, removes node_pool_t from memory
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//!if its reference count reaches to zero. Never throws
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~adaptive_pool_base()
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{ ipcdetail::destroy_node_pool_if_last_link(node_pool<0>::get(ipcdetail::to_raw_pointer(mp_node_pool))); }
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//!Returns a pointer to the node pool.
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//!Never throws
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void* get_node_pool() const
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{ return ipcdetail::to_raw_pointer(mp_node_pool); }
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//!Returns the segment manager.
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//!Never throws
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segment_manager* get_segment_manager()const
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{ return node_pool<0>::get(ipcdetail::to_raw_pointer(mp_node_pool))->get_segment_manager(); }
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//!Swaps allocators. Does not throw. If each allocator is placed in a
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//!different memory segment, the result is undefined.
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friend void swap(self_t &alloc1, self_t &alloc2)
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{ boost::adl_move_swap(alloc1.mp_node_pool, alloc2.mp_node_pool); }
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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private:
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void_pointer mp_node_pool;
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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};
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//!Equality test for same type
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//!of adaptive_pool_base
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template<unsigned int V, class T, class S, std::size_t NPC, std::size_t F, unsigned char OP> inline
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bool operator==(const adaptive_pool_base<V, T, S, NPC, F, OP> &alloc1,
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const adaptive_pool_base<V, T, S, NPC, F, OP> &alloc2)
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{ return alloc1.get_node_pool() == alloc2.get_node_pool(); }
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//!Inequality test for same type
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//!of adaptive_pool_base
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template<unsigned int V, class T, class S, std::size_t NPC, std::size_t F, unsigned char OP> inline
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bool operator!=(const adaptive_pool_base<V, T, S, NPC, F, OP> &alloc1,
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const adaptive_pool_base<V, T, S, NPC, F, OP> &alloc2)
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{ return alloc1.get_node_pool() != alloc2.get_node_pool(); }
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template < class T
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, class SegmentManager
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, std::size_t NodesPerBlock = 64
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, std::size_t MaxFreeBlocks = 2
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, unsigned char OverheadPercent = 5
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>
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class adaptive_pool_v1
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: public adaptive_pool_base
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< 1
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, T
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, SegmentManager
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, NodesPerBlock
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, MaxFreeBlocks
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, OverheadPercent
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>
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{
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public:
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typedef ipcdetail::adaptive_pool_base
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< 1, T, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> base_t;
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template<class T2>
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struct rebind
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{
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typedef adaptive_pool_v1<T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> other;
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};
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adaptive_pool_v1(SegmentManager *segment_mngr)
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: base_t(segment_mngr)
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{}
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template<class T2>
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adaptive_pool_v1
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(const adaptive_pool_v1<T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> &other)
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: base_t(other)
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{}
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};
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} //namespace ipcdetail{
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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//!An STL node allocator that uses a segment manager as memory
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//!source. The internal pointer type will of the same type (raw, smart) as
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//!"typename SegmentManager::void_pointer" type. This allows
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//!placing the allocator in shared memory, memory mapped-files, etc...
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//!
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//!This node allocator shares a segregated storage between all instances
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//!of adaptive_pool with equal sizeof(T) placed in the same segment
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//!group. NodesPerBlock is the number of nodes allocated at once when the allocator
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//!needs runs out of nodes. MaxFreeBlocks is the maximum number of totally free blocks
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//!that the adaptive node pool will hold. The rest of the totally free blocks will be
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//!deallocated with the segment manager.
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//!
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//!OverheadPercent is the (approximated) maximum size overhead (1-20%) of the allocator:
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//!(memory usable for nodes / total memory allocated from the segment manager)
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template < class T
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, class SegmentManager
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, std::size_t NodesPerBlock
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, std::size_t MaxFreeBlocks
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, unsigned char OverheadPercent
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>
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class adaptive_pool
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#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
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: public ipcdetail::adaptive_pool_base
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< 2
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, T
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, SegmentManager
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, NodesPerBlock
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, MaxFreeBlocks
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, OverheadPercent
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>
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#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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{
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#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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typedef ipcdetail::adaptive_pool_base
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< 2, T, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> base_t;
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public:
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typedef boost::interprocess::version_type<adaptive_pool, 2> version;
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template<class T2>
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struct rebind
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{
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typedef adaptive_pool<T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> other;
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};
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adaptive_pool(SegmentManager *segment_mngr)
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: base_t(segment_mngr)
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{}
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template<class T2>
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adaptive_pool
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(const adaptive_pool<T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> &other)
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: base_t(other)
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{}
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#else //BOOST_INTERPROCESS_DOXYGEN_INVOKED
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public:
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typedef implementation_defined::segment_manager segment_manager;
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typedef segment_manager::void_pointer void_pointer;
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typedef implementation_defined::pointer pointer;
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typedef implementation_defined::const_pointer const_pointer;
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typedef T value_type;
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typedef typename ipcdetail::add_reference
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<value_type>::type reference;
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typedef typename ipcdetail::add_reference
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<const value_type>::type const_reference;
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typedef typename segment_manager::size_type size_type;
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typedef typename segment_manager::difference_type difference_type;
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//!Obtains adaptive_pool from
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//!adaptive_pool
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template<class T2>
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struct rebind
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{
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typedef adaptive_pool<T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> other;
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};
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private:
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//!Not assignable from
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//!related adaptive_pool
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template<class T2, class SegmentManager2, std::size_t N2, std::size_t F2, unsigned char OP2>
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adaptive_pool& operator=
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(const adaptive_pool<T2, SegmentManager2, N2, F2, OP2>&);
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//!Not assignable from
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//!other adaptive_pool
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//adaptive_pool& operator=(const adaptive_pool&);
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public:
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//!Constructor from a segment manager. If not present, constructs a node
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//!pool. Increments the reference count of the associated node pool.
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//!Can throw boost::interprocess::bad_alloc
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adaptive_pool(segment_manager *segment_mngr);
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//!Copy constructor from other adaptive_pool. Increments the reference
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//!count of the associated node pool. Never throws
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adaptive_pool(const adaptive_pool &other);
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//!Copy constructor from related adaptive_pool. If not present, constructs
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//!a node pool. Increments the reference count of the associated node pool.
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//!Can throw boost::interprocess::bad_alloc
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template<class T2>
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adaptive_pool
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(const adaptive_pool<T2, SegmentManager, NodesPerBlock, MaxFreeBlocks, OverheadPercent> &other);
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//!Destructor, removes node_pool_t from memory
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//!if its reference count reaches to zero. Never throws
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~adaptive_pool();
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//!Returns a pointer to the node pool.
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//!Never throws
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void* get_node_pool() const;
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//!Returns the segment manager.
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//!Never throws
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segment_manager* get_segment_manager()const;
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//!Returns the number of elements that could be allocated.
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//!Never throws
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size_type max_size() const;
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//!Allocate memory for an array of count elements.
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//!Throws boost::interprocess::bad_alloc if there is no enough memory
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pointer allocate(size_type count, cvoid_pointer hint = 0);
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//!Deallocate allocated memory.
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//!Never throws
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void deallocate(const pointer &ptr, size_type count);
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//!Deallocates all free blocks
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//!of the pool
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void deallocate_free_blocks();
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//!Swaps allocators. Does not throw. If each allocator is placed in a
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//!different memory segment, the result is undefined.
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friend void swap(self_t &alloc1, self_t &alloc2);
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//!Returns address of mutable object.
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//!Never throws
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pointer address(reference value) const;
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//!Returns address of non mutable object.
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//!Never throws
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const_pointer address(const_reference value) const;
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/*
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//!Copy construct an object.
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//!Throws if T's copy constructor throws
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void construct(const pointer &ptr, const_reference v);
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//!Destroys object. Throws if object's
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//!destructor throws
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void destroy(const pointer &ptr);
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*/
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//!Returns maximum the number of objects the previously allocated memory
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//!pointed by p can hold. This size only works for memory allocated with
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//!allocate, allocation_command and allocate_many.
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size_type size(const pointer &p) const;
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pointer allocation_command(boost::interprocess::allocation_type command,
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size_type limit_size, size_type &prefer_in_recvd_out_size, pointer &reuse);
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//!Allocates many elements of size elem_size in a contiguous block
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//!of memory. The minimum number to be allocated is min_elements,
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//!the preferred and maximum number is
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//!preferred_elements. The number of actually allocated elements is
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//!will be assigned to received_size. The elements must be deallocated
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//!with deallocate(...)
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void allocate_many(size_type elem_size, size_type num_elements, multiallocation_chain &chain);
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//!Allocates n_elements elements, each one of size elem_sizes[i]in a
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//!contiguous block
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//!of memory. The elements must be deallocated
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void allocate_many(const size_type *elem_sizes, size_type n_elements, multiallocation_chain &chain);
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//!Allocates many elements of size elem_size in a contiguous block
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//!of memory. The minimum number to be allocated is min_elements,
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//!the preferred and maximum number is
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//!preferred_elements. The number of actually allocated elements is
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//!will be assigned to received_size. The elements must be deallocated
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//!with deallocate(...)
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void deallocate_many(multiallocation_chain &chain);
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//!Allocates just one object. Memory allocated with this function
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//!must be deallocated only with deallocate_one().
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//!Throws boost::interprocess::bad_alloc if there is no enough memory
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pointer allocate_one();
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//!Allocates many elements of size == 1 in a contiguous block
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//!of memory. The minimum number to be allocated is min_elements,
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//!the preferred and maximum number is
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//!preferred_elements. The number of actually allocated elements is
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//!will be assigned to received_size. Memory allocated with this function
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//!must be deallocated only with deallocate_one().
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void allocate_individual(size_type num_elements, multiallocation_chain &chain);
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//!Deallocates memory previously allocated with allocate_one().
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//!You should never use deallocate_one to deallocate memory allocated
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//!with other functions different from allocate_one(). Never throws
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void deallocate_one(const pointer &p);
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//!Allocates many elements of size == 1 in a contiguous block
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//!of memory. The minimum number to be allocated is min_elements,
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//!the preferred and maximum number is
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//!preferred_elements. The number of actually allocated elements is
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//!will be assigned to received_size. Memory allocated with this function
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//!must be deallocated only with deallocate_one().
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void deallocate_individual(multiallocation_chain &chain);
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#endif
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};
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#ifdef BOOST_INTERPROCESS_DOXYGEN_INVOKED
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//!Equality test for same type
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//!of adaptive_pool
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template<class T, class S, std::size_t NodesPerBlock, std::size_t F, unsigned char OP> inline
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bool operator==(const adaptive_pool<T, S, NodesPerBlock, F, OP> &alloc1,
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const adaptive_pool<T, S, NodesPerBlock, F, OP> &alloc2);
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//!Inequality test for same type
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//!of adaptive_pool
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template<class T, class S, std::size_t NodesPerBlock, std::size_t F, unsigned char OP> inline
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bool operator!=(const adaptive_pool<T, S, NodesPerBlock, F, OP> &alloc1,
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const adaptive_pool<T, S, NodesPerBlock, F, OP> &alloc2);
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#endif
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} //namespace interprocess {
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} //namespace boost {
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#include <boost/interprocess/detail/config_end.hpp>
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#endif //#ifndef BOOST_INTERPROCESS_ADAPTIVE_POOL_HPP
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