387 lines
14 KiB
C++
387 lines
14 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/container for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_CONTAINER_DETAIL_NODE_ALLOC_HPP_
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#define BOOST_CONTAINER_DETAIL_NODE_ALLOC_HPP_
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#if (defined _MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif
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#include "config_begin.hpp"
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#include <boost/container/detail/workaround.hpp>
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#include <utility>
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#include <functional>
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#include <boost/move/utility.hpp>
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#include <boost/intrusive/options.hpp>
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#include <boost/container/detail/version_type.hpp>
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#include <boost/container/detail/type_traits.hpp>
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#include <boost/container/detail/utilities.hpp>
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#include <boost/container/allocator_traits.hpp>
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#include <boost/container/detail/mpl.hpp>
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#include <boost/container/detail/destroyers.hpp>
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#include <boost/container/detail/allocator_version_traits.hpp>
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#include <boost/detail/no_exceptions_support.hpp>
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#ifndef BOOST_CONTAINER_PERFECT_FORWARDING
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#include <boost/container/detail/preprocessor.hpp>
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#endif
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#include <boost/container/detail/algorithms.hpp>
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#include <new>
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namespace boost {
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namespace container {
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namespace container_detail {
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template<class ValueCompare, class Node>
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struct node_compare
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: private ValueCompare
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{
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typedef typename ValueCompare::key_type key_type;
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typedef typename ValueCompare::value_type value_type;
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typedef typename ValueCompare::key_of_value key_of_value;
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node_compare(const ValueCompare &pred)
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: ValueCompare(pred)
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{}
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ValueCompare &value_comp()
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{ return static_cast<ValueCompare &>(*this); }
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ValueCompare &value_comp() const
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{ return static_cast<const ValueCompare &>(*this); }
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bool operator()(const Node &a, const Node &b) const
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{ return ValueCompare::operator()(a.get_data(), b.get_data()); }
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};
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template<class A, class ICont, class Pred = container_detail::nat>
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struct node_alloc_holder
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{
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typedef allocator_traits<A> allocator_traits_type;
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typedef node_alloc_holder<A, ICont> self_t;
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typedef typename allocator_traits_type::value_type value_type;
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typedef typename ICont::value_type Node;
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typedef typename allocator_traits_type::template
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portable_rebind_alloc<Node>::type NodeAlloc;
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typedef allocator_traits<NodeAlloc> node_allocator_traits_type;
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typedef A ValAlloc;
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typedef typename node_allocator_traits_type::pointer NodePtr;
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typedef container_detail::scoped_deallocator<NodeAlloc> Deallocator;
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typedef typename node_allocator_traits_type::size_type size_type;
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typedef typename node_allocator_traits_type::difference_type difference_type;
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typedef container_detail::integral_constant<unsigned, 1> allocator_v1;
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typedef container_detail::integral_constant<unsigned, 2> allocator_v2;
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typedef container_detail::integral_constant<unsigned,
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boost::container::container_detail::
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version<NodeAlloc>::value> alloc_version;
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typedef typename ICont::iterator icont_iterator;
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typedef typename ICont::const_iterator icont_citerator;
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typedef allocator_destroyer<NodeAlloc> Destroyer;
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typedef allocator_traits<NodeAlloc> NodeAllocTraits;
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typedef allocator_version_traits<NodeAlloc> AllocVersionTraits;
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private:
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BOOST_COPYABLE_AND_MOVABLE(node_alloc_holder)
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public:
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//Constructors for sequence containers
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node_alloc_holder()
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: members_()
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{}
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explicit node_alloc_holder(const ValAlloc &a)
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: members_(a)
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{}
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explicit node_alloc_holder(const node_alloc_holder &x)
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: members_(NodeAllocTraits::select_on_container_copy_construction(x.node_alloc()))
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{}
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explicit node_alloc_holder(BOOST_RV_REF(node_alloc_holder) x)
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: members_(boost::move(x.node_alloc()))
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{ this->icont().swap(x.icont()); }
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//Constructors for associative containers
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explicit node_alloc_holder(const ValAlloc &a, const Pred &c)
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: members_(a, c)
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{}
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explicit node_alloc_holder(const node_alloc_holder &x, const Pred &c)
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: members_(NodeAllocTraits::select_on_container_copy_construction(x.node_alloc()), c)
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{}
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explicit node_alloc_holder(const Pred &c)
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: members_(c)
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{}
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//helpers for move assignments
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explicit node_alloc_holder(BOOST_RV_REF(node_alloc_holder) x, const Pred &c)
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: members_(boost::move(x.node_alloc()), c)
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{ this->icont().swap(x.icont()); }
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void copy_assign_alloc(const node_alloc_holder &x)
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{
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container_detail::bool_<allocator_traits_type::propagate_on_container_copy_assignment::value> flag;
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container_detail::assign_alloc( static_cast<NodeAlloc &>(this->members_)
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, static_cast<const NodeAlloc &>(x.members_), flag);
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}
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void move_assign_alloc( node_alloc_holder &x)
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{
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container_detail::bool_<allocator_traits_type::propagate_on_container_move_assignment::value> flag;
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container_detail::move_alloc( static_cast<NodeAlloc &>(this->members_)
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, static_cast<NodeAlloc &>(x.members_), flag);
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}
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~node_alloc_holder()
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{ this->clear(alloc_version()); }
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size_type max_size() const
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{ return allocator_traits_type::max_size(this->node_alloc()); }
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NodePtr allocate_one()
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{ return AllocVersionTraits::allocate_one(this->node_alloc()); }
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void deallocate_one(const NodePtr &p)
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{ AllocVersionTraits::deallocate_one(this->node_alloc(), p); }
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#ifdef BOOST_CONTAINER_PERFECT_FORWARDING
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template<class ...Args>
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NodePtr create_node(Args &&...args)
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{
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NodePtr p = this->allocate_one();
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Deallocator node_deallocator(p, this->node_alloc());
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allocator_traits<NodeAlloc>::construct
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( this->node_alloc()
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, container_detail::addressof(p->m_data), boost::forward<Args>(args)...);
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node_deallocator.release();
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//This does not throw
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typedef typename Node::hook_type hook_type;
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::new(static_cast<hook_type*>(container_detail::to_raw_pointer(p))) hook_type;
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return (p);
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}
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#else //#ifdef BOOST_CONTAINER_PERFECT_FORWARDING
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#define BOOST_PP_LOCAL_MACRO(n) \
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\
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BOOST_PP_EXPR_IF(n, template<) BOOST_PP_ENUM_PARAMS(n, class P) BOOST_PP_EXPR_IF(n, >) \
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NodePtr create_node(BOOST_PP_ENUM(n, BOOST_CONTAINER_PP_PARAM_LIST, _)) \
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{ \
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NodePtr p = this->allocate_one(); \
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Deallocator node_deallocator(p, this->node_alloc()); \
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allocator_traits<NodeAlloc>::construct \
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(this->node_alloc(), container_detail::addressof(p->m_data) \
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BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _)); \
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node_deallocator.release(); \
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typedef typename Node::hook_type hook_type; \
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::new(static_cast<hook_type*>(container_detail::to_raw_pointer(p))) hook_type; \
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return (p); \
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} \
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//!
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#define BOOST_PP_LOCAL_LIMITS (0, BOOST_CONTAINER_MAX_CONSTRUCTOR_PARAMETERS)
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#include BOOST_PP_LOCAL_ITERATE()
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#endif //#ifdef BOOST_CONTAINER_PERFECT_FORWARDING
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template<class It>
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NodePtr create_node_from_it(const It &it)
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{
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NodePtr p = this->allocate_one();
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Deallocator node_deallocator(p, this->node_alloc());
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::boost::container::construct_in_place(this->node_alloc(), container_detail::addressof(p->m_data), it);
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node_deallocator.release();
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//This does not throw
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typedef typename Node::hook_type hook_type;
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::new(static_cast<hook_type*>(container_detail::to_raw_pointer(p))) hook_type;
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return (p);
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}
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void destroy_node(const NodePtr &nodep)
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{
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allocator_traits<NodeAlloc>::destroy(this->node_alloc(), container_detail::to_raw_pointer(nodep));
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this->deallocate_one(nodep);
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}
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void swap(node_alloc_holder &x)
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{
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this->icont().swap(x.icont());
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container_detail::bool_<allocator_traits_type::propagate_on_container_swap::value> flag;
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container_detail::swap_alloc(this->node_alloc(), x.node_alloc(), flag);
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}
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template<class FwdIterator, class Inserter>
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void allocate_many_and_construct
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(FwdIterator beg, difference_type n, Inserter inserter)
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{
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if(n){
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/*
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NodePtr p = this->allocate_one();
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Deallocator node_deallocator(p, this->node_alloc());
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::boost::container::construct_in_place(this->node_alloc(), container_detail::addressof(p->m_data), it);
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node_deallocator.release();
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//This does not throw
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typedef typename Node::hook_type hook_type;
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::new(static_cast<hook_type*>(container_detail::to_raw_pointer(p))) hook_type;
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return (p);
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*/
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typedef typename NodeAlloc::multiallocation_chain multiallocation_chain;
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//Try to allocate memory in a single block
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typedef typename multiallocation_chain::iterator multialloc_iterator;
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multiallocation_chain mem;
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this->node_alloc().allocate_individual(n, mem);
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multialloc_iterator itbeg(mem.begin()), itlast(mem.last());
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mem.clear();
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Node *p = 0;
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NodeAlloc &nalloc = this->node_alloc();
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BOOST_TRY{
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while(n--){
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p = container_detail::to_raw_pointer(&*itbeg);
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++itbeg;
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//This can throw
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Deallocator node_deallocator(p, nalloc);
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boost::container::construct_in_place(nalloc, container_detail::addressof(p->m_data), beg);
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++beg;
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node_deallocator.release();
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//This does not throw
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typedef typename Node::hook_type hook_type;
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::new(static_cast<hook_type*>(p)) hook_type;
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//This can throw in some containers (predicate might throw)
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inserter(*p);
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}
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}
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BOOST_CATCH(...){
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mem.incorporate_after(mem.last(), &*itbeg, &*itlast, n);
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this->node_alloc().deallocate_individual(mem);
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BOOST_RETHROW
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}
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BOOST_CATCH_END
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}
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}
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void clear(allocator_v1)
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{ this->icont().clear_and_dispose(Destroyer(this->node_alloc())); }
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void clear(allocator_v2)
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{
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typename NodeAlloc::multiallocation_chain chain;
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allocator_destroyer_and_chain_builder<NodeAlloc> builder(this->node_alloc(), chain);
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this->icont().clear_and_dispose(builder);
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//BOOST_STATIC_ASSERT((::boost::has_move_emulation_enabled<typename NodeAlloc::multiallocation_chain>::value == true));
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if(!chain.empty())
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this->node_alloc().deallocate_individual(chain);
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}
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icont_iterator erase_range(const icont_iterator &first, const icont_iterator &last, allocator_v1)
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{ return this->icont().erase_and_dispose(first, last, Destroyer(this->node_alloc())); }
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icont_iterator erase_range(const icont_iterator &first, const icont_iterator &last, allocator_v2)
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{
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typedef typename NodeAlloc::multiallocation_chain multiallocation_chain;
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NodeAlloc & nalloc = this->node_alloc();
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multiallocation_chain chain;
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allocator_destroyer_and_chain_builder<NodeAlloc> chain_builder(nalloc, chain);
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icont_iterator ret_it = this->icont().erase_and_dispose(first, last, chain_builder);
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nalloc.deallocate_individual(chain);
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return ret_it;
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}
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template<class Key, class Comparator>
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size_type erase_key(const Key& k, const Comparator &comp, allocator_v1)
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{ return this->icont().erase_and_dispose(k, comp, Destroyer(this->node_alloc())); }
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template<class Key, class Comparator>
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size_type erase_key(const Key& k, const Comparator &comp, allocator_v2)
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{
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allocator_multialloc_chain_node_deallocator<NodeAlloc> chain_holder(this->node_alloc());
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return this->icont().erase_and_dispose(k, comp, chain_holder.get_chain_builder());
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}
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protected:
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struct cloner
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{
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cloner(node_alloc_holder &holder)
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: m_holder(holder)
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{}
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NodePtr operator()(const Node &other) const
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{ return m_holder.create_node(other.get_data()); }
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node_alloc_holder &m_holder;
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};
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struct members_holder
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: public NodeAlloc
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{
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private:
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members_holder(const members_holder&);
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members_holder & operator=(const members_holder&);
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public:
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members_holder()
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: NodeAlloc(), m_icont()
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{}
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template<class ConvertibleToAlloc>
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explicit members_holder(BOOST_FWD_REF(ConvertibleToAlloc) c2alloc)
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: NodeAlloc(boost::forward<ConvertibleToAlloc>(c2alloc))
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, m_icont()
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{}
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template<class ConvertibleToAlloc>
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members_holder(BOOST_FWD_REF(ConvertibleToAlloc) c2alloc, const Pred &c)
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: NodeAlloc(boost::forward<ConvertibleToAlloc>(c2alloc))
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, m_icont(typename ICont::value_compare(c))
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{}
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explicit members_holder(const Pred &c)
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: NodeAlloc()
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, m_icont(typename ICont::value_compare(c))
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{}
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//The intrusive container
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ICont m_icont;
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};
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ICont &non_const_icont() const
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{ return const_cast<ICont&>(this->members_.m_icont); }
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ICont &icont()
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{ return this->members_.m_icont; }
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const ICont &icont() const
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{ return this->members_.m_icont; }
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NodeAlloc &node_alloc()
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{ return static_cast<NodeAlloc &>(this->members_); }
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const NodeAlloc &node_alloc() const
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{ return static_cast<const NodeAlloc &>(this->members_); }
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members_holder members_;
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};
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} //namespace container_detail {
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} //namespace container {
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} //namespace boost {
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#include <boost/container/detail/config_end.hpp>
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#endif // BOOST_CONTAINER_DETAIL_NODE_ALLOC_HPP_
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