boost/multi_index/hashed_index.hpp
/* Copyright 2003-2014 Joaquin M Lopez Munoz. * Distributed under the Boost Software License, Version 1.0. * (See accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) * * See http://www.boost.org/libs/multi_index for library home page. */ #ifndef BOOST_MULTI_INDEX_HASHED_INDEX_HPP #define BOOST_MULTI_INDEX_HASHED_INDEX_HPP #if defined(_MSC_VER) #pragma once #endif #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ #include <algorithm> #include <boost/call_traits.hpp> #include <boost/detail/allocator_utilities.hpp> #include <boost/detail/no_exceptions_support.hpp> #include <boost/detail/workaround.hpp> #include <boost/foreach_fwd.hpp> #include <boost/limits.hpp> #include <boost/move/core.hpp> #include <boost/mpl/bool.hpp> #include <boost/mpl/if.hpp> #include <boost/mpl/push_front.hpp> #include <boost/multi_index/detail/access_specifier.hpp> #include <boost/multi_index/detail/auto_space.hpp> #include <boost/multi_index/detail/bucket_array.hpp> #include <boost/multi_index/detail/do_not_copy_elements_tag.hpp> #include <boost/multi_index/detail/hash_index_iterator.hpp> #include <boost/multi_index/detail/index_node_base.hpp> #include <boost/multi_index/detail/modify_key_adaptor.hpp> #include <boost/multi_index/detail/safe_mode.hpp> #include <boost/multi_index/detail/scope_guard.hpp> #include <boost/multi_index/detail/vartempl_support.hpp> #include <boost/multi_index/hashed_index_fwd.hpp> #include <boost/tuple/tuple.hpp> #include <boost/type_traits/is_same.hpp> #include <cmath> #include <cstddef> #include <functional> #include <iterator> #include <utility> #if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) #include <initializer_list> #endif #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION) #include <boost/serialization/nvp.hpp> #endif #if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING) #define BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT_OF(x) \ detail::scope_guard BOOST_JOIN(check_invariant_,__LINE__)= \ detail::make_obj_guard(x,&hashed_index::check_invariant_); \ BOOST_JOIN(check_invariant_,__LINE__).touch(); #define BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT \ BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT_OF(*this) #else #define BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT_OF(x) #define BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT #endif namespace boost{ namespace multi_index{ namespace detail{ /* hashed_index adds a layer of hashed indexing to a given Super */ /* Most of the implementation of unique and non-unique indices is * shared. We tell from one another on instantiation time by using * Category tags defined in hash_index_node.hpp. */ template< typename KeyFromValue,typename Hash,typename Pred, typename SuperMeta,typename TagList,typename Category > class hashed_index: BOOST_MULTI_INDEX_PROTECTED_IF_MEMBER_TEMPLATE_FRIENDS SuperMeta::type #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) ,public safe_mode::safe_container< hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category> > #endif { #if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\ BOOST_WORKAROUND(__MWERKS__,<=0x3003) /* The "ISO C++ Template Parser" option in CW8.3 has a problem with the * lifetime of const references bound to temporaries --precisely what * scopeguards are. */ #pragma parse_mfunc_templ off #endif typedef typename SuperMeta::type super; protected: typedef hashed_index_node< typename super::node_type,Category> node_type; private: typedef typename node_type::node_alg node_alg; typedef typename node_type::impl_type node_impl_type; typedef typename node_impl_type::pointer node_impl_pointer; typedef typename node_impl_type::base_pointer node_impl_base_pointer; typedef bucket_array< typename super::final_allocator_type> bucket_array_type; public: /* types */ typedef typename KeyFromValue::result_type key_type; typedef typename node_type::value_type value_type; typedef KeyFromValue key_from_value; typedef Hash hasher; typedef Pred key_equal; typedef tuple<std::size_t, key_from_value,hasher,key_equal> ctor_args; typedef typename super::final_allocator_type allocator_type; typedef typename allocator_type::pointer pointer; typedef typename allocator_type::const_pointer const_pointer; typedef typename allocator_type::reference reference; typedef typename allocator_type::const_reference const_reference; typedef std::size_t size_type; typedef std::ptrdiff_t difference_type; #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) typedef safe_mode::safe_iterator< hashed_index_iterator< node_type,bucket_array_type, hashed_index_global_iterator_tag>, hashed_index> iterator; #else typedef hashed_index_iterator< node_type,bucket_array_type, hashed_index_global_iterator_tag> iterator; #endif typedef iterator const_iterator; typedef hashed_index_iterator< node_type,bucket_array_type, hashed_index_local_iterator_tag> local_iterator; typedef local_iterator const_local_iterator; typedef TagList tag_list; protected: typedef typename super::final_node_type final_node_type; typedef tuples::cons< ctor_args, typename super::ctor_args_list> ctor_args_list; typedef typename mpl::push_front< typename super::index_type_list, hashed_index>::type index_type_list; typedef typename mpl::push_front< typename super::iterator_type_list, iterator>::type iterator_type_list; typedef typename mpl::push_front< typename super::const_iterator_type_list, const_iterator>::type const_iterator_type_list; typedef typename super::copy_map_type copy_map_type; #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION) typedef typename super::index_saver_type index_saver_type; typedef typename super::index_loader_type index_loader_type; #endif private: #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) typedef safe_mode::safe_container< hashed_index> safe_super; #endif typedef typename call_traits<value_type>::param_type value_param_type; typedef typename call_traits< key_type>::param_type key_param_type; /* Needed to avoid commas in BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL * expansion. */ typedef std::pair<iterator,bool> emplace_return_type; public: /* construct/destroy/copy * Default and copy ctors are in the protected section as indices are * not supposed to be created on their own. No range ctor either. */ hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& operator=( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x) { this->final()=x.final(); return *this; } #if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& operator=( std::initializer_list<value_type> list) { this->final()=list; return *this; } #endif allocator_type get_allocator()const BOOST_NOEXCEPT { return this->final().get_allocator(); } /* size and capacity */ bool empty()const BOOST_NOEXCEPT{return this->final_empty_();} size_type size()const BOOST_NOEXCEPT{return this->final_size_();} size_type max_size()const BOOST_NOEXCEPT{return this->final_max_size_();} /* iterators */ iterator begin()BOOST_NOEXCEPT {return make_iterator(node_type::from_impl(header()->next()->prior()));} const_iterator begin()const BOOST_NOEXCEPT {return make_iterator(node_type::from_impl(header()->next()->prior()));} iterator end()BOOST_NOEXCEPT{return make_iterator(header());} const_iterator end()const BOOST_NOEXCEPT{return make_iterator(header());} const_iterator cbegin()const BOOST_NOEXCEPT{return begin();} const_iterator cend()const BOOST_NOEXCEPT{return end();} iterator iterator_to(const value_type& x) { return make_iterator(node_from_value<node_type>(&x)); } const_iterator iterator_to(const value_type& x)const { return make_iterator(node_from_value<node_type>(&x)); } /* modifiers */ BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL( emplace_return_type,emplace,emplace_impl) BOOST_MULTI_INDEX_OVERLOADS_TO_VARTEMPL_EXTRA_ARG( iterator,emplace_hint,emplace_hint_impl,iterator,position) std::pair<iterator,bool> insert(const value_type& x) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::pair<final_node_type*,bool> p=this->final_insert_(x); return std::pair<iterator,bool>(make_iterator(p.first),p.second); } std::pair<iterator,bool> insert(BOOST_RV_REF(value_type) x) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::pair<final_node_type*,bool> p=this->final_insert_rv_(x); return std::pair<iterator,bool>(make_iterator(p.first),p.second); } iterator insert(iterator position,const value_type& x) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::pair<final_node_type*,bool> p=this->final_insert_( x,static_cast<final_node_type*>(position.get_node())); return make_iterator(p.first); } iterator insert(iterator position,BOOST_RV_REF(value_type) x) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::pair<final_node_type*,bool> p=this->final_insert_rv_( x,static_cast<final_node_type*>(position.get_node())); return make_iterator(p.first); } template<typename InputIterator> void insert(InputIterator first,InputIterator last) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; for(;first!=last;++first)this->final_insert_ref_(*first); } #if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) void insert(std::initializer_list<value_type> list) { insert(list.begin(),list.end()); } #endif iterator erase(iterator position) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; this->final_erase_(static_cast<final_node_type*>(position++.get_node())); return position; } size_type erase(key_param_type k) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::size_t buc=buckets.position(hash_(k)); for(node_impl_pointer x=buckets.at(buc)->prior(); x!=node_impl_pointer(0);x=node_alg::next_to_inspect(x)){ if(eq_(k,key(node_type::from_impl(x)->value()))){ node_impl_pointer y=end_of_range(x); size_type s=0; do{ node_impl_pointer z=node_alg::after(x); this->final_erase_( static_cast<final_node_type*>(node_type::from_impl(x))); x=z; ++s; }while(x!=y); return s; } } return 0; } iterator erase(iterator first,iterator last) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(first); BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(last); BOOST_MULTI_INDEX_CHECK_IS_OWNER(first,*this); BOOST_MULTI_INDEX_CHECK_IS_OWNER(last,*this); BOOST_MULTI_INDEX_CHECK_VALID_RANGE(first,last); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; while(first!=last){ first=erase(first); } return first; } bool replace(iterator position,const value_type& x) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; return this->final_replace_( x,static_cast<final_node_type*>(position.get_node())); } bool replace(iterator position,BOOST_RV_REF(value_type) x) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; return this->final_replace_rv_( x,static_cast<final_node_type*>(position.get_node())); } template<typename Modifier> bool modify(iterator position,Modifier mod) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) /* MSVC++ 6.0 optimizer on safe mode code chokes if this * this is not added. Left it for all compilers as it does no * harm. */ position.detach(); #endif return this->final_modify_( mod,static_cast<final_node_type*>(position.get_node())); } template<typename Modifier,typename Rollback> bool modify(iterator position,Modifier mod,Rollback back_) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) /* MSVC++ 6.0 optimizer on safe mode code chokes if this * this is not added. Left it for all compilers as it does no * harm. */ position.detach(); #endif return this->final_modify_( mod,back_,static_cast<final_node_type*>(position.get_node())); } template<typename Modifier> bool modify_key(iterator position,Modifier mod) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; return modify( position,modify_key_adaptor<Modifier,value_type,KeyFromValue>(mod,key)); } template<typename Modifier,typename Rollback> bool modify_key(iterator position,Modifier mod,Rollback back_) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_DEREFERENCEABLE_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; return modify( position, modify_key_adaptor<Modifier,value_type,KeyFromValue>(mod,key), modify_key_adaptor<Rollback,value_type,KeyFromValue>(back_,key)); } void clear()BOOST_NOEXCEPT { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; this->final_clear_(); } void swap(hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT_OF(x); this->final_swap_(x.final()); } /* observers */ key_from_value key_extractor()const{return key;} hasher hash_function()const{return hash_;} key_equal key_eq()const{return eq_;} /* lookup */ /* Internally, these ops rely on const_iterator being the same * type as iterator. */ template<typename CompatibleKey> iterator find(const CompatibleKey& k)const { return find(k,hash_,eq_); } template< typename CompatibleKey,typename CompatibleHash,typename CompatiblePred > iterator find( const CompatibleKey& k, const CompatibleHash& hash,const CompatiblePred& eq)const { std::size_t buc=buckets.position(hash(k)); for(node_impl_pointer x=buckets.at(buc)->prior(); x!=node_impl_pointer(0);x=node_alg::next_to_inspect(x)){ if(eq(k,key(node_type::from_impl(x)->value()))){ return make_iterator(node_type::from_impl(x)); } } return end(); } template<typename CompatibleKey> size_type count(const CompatibleKey& k)const { return count(k,hash_,eq_); } template< typename CompatibleKey,typename CompatibleHash,typename CompatiblePred > size_type count( const CompatibleKey& k, const CompatibleHash& hash,const CompatiblePred& eq)const { std::size_t buc=buckets.position(hash(k)); for(node_impl_pointer x=buckets.at(buc)->prior(); x!=node_impl_pointer(0);x=node_alg::next_to_inspect(x)){ if(eq(k,key(node_type::from_impl(x)->value()))){ size_type res=0; node_impl_pointer y=end_of_range(x); do{ ++res; x=node_alg::after(x); }while(x!=y); return res; } } return 0; } template<typename CompatibleKey> std::pair<iterator,iterator> equal_range(const CompatibleKey& k)const { return equal_range(k,hash_,eq_); } template< typename CompatibleKey,typename CompatibleHash,typename CompatiblePred > std::pair<iterator,iterator> equal_range( const CompatibleKey& k, const CompatibleHash& hash,const CompatiblePred& eq)const { std::size_t buc=buckets.position(hash(k)); for(node_impl_pointer x=buckets.at(buc)->prior(); x!=node_impl_pointer(0);x=node_alg::next_to_inspect(x)){ if(eq(k,key(node_type::from_impl(x)->value()))){ return std::pair<iterator,iterator>( make_iterator(node_type::from_impl(x)), make_iterator(node_type::from_impl(end_of_range(x)))); } } return std::pair<iterator,iterator>(end(),end()); } /* bucket interface */ size_type bucket_count()const BOOST_NOEXCEPT{return buckets.size();} size_type max_bucket_count()const BOOST_NOEXCEPT{return static_cast<size_type>(-1);} size_type bucket_size(size_type n)const { size_type res=0; for(node_impl_pointer x=buckets.at(n)->prior(); x!=node_impl_pointer(0);x=node_alg::after_local(x)){ ++res; } return res; } size_type bucket(key_param_type k)const { return buckets.position(hash_(k)); } local_iterator begin(size_type n) { return const_cast<const hashed_index*>(this)->begin(n); } const_local_iterator begin(size_type n)const { node_impl_pointer x=buckets.at(n)->prior(); if(x==node_impl_pointer(0))return end(n); return make_local_iterator(node_type::from_impl(x)); } local_iterator end(size_type n) { return const_cast<const hashed_index*>(this)->end(n); } const_local_iterator end(size_type)const { return make_local_iterator(0); } const_local_iterator cbegin(size_type n)const{return begin(n);} const_local_iterator cend(size_type n)const{return end(n);} local_iterator local_iterator_to(const value_type& x) { return make_local_iterator(node_from_value<node_type>(&x)); } const_local_iterator local_iterator_to(const value_type& x)const { return make_local_iterator(node_from_value<node_type>(&x)); } /* hash policy */ float load_factor()const BOOST_NOEXCEPT {return static_cast<float>(size())/bucket_count();} float max_load_factor()const BOOST_NOEXCEPT{return mlf;} void max_load_factor(float z){mlf=z;calculate_max_load();} void rehash(size_type n) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; if(size()<=max_load&&n<=bucket_count())return; size_type bc =(std::numeric_limits<size_type>::max)(); float fbc=static_cast<float>(1+size()/mlf); if(bc>fbc){ bc=static_cast<size_type>(fbc); if(bc<n)bc=n; } unchecked_rehash(bc); } void reserve(size_type n) { rehash(static_cast<size_type>(std::ceil(static_cast<double>(n)/mlf))); } BOOST_MULTI_INDEX_PROTECTED_IF_MEMBER_TEMPLATE_FRIENDS: hashed_index(const ctor_args_list& args_list,const allocator_type& al): super(args_list.get_tail(),al), key(tuples::get<1>(args_list.get_head())), hash_(tuples::get<2>(args_list.get_head())), eq_(tuples::get<3>(args_list.get_head())), buckets(al,header()->impl(),tuples::get<0>(args_list.get_head())), mlf(1.0f) { calculate_max_load(); } hashed_index( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x): super(x), #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) safe_super(), #endif key(x.key), hash_(x.hash_), eq_(x.eq_), buckets(x.get_allocator(),header()->impl(),x.buckets.size()), mlf(x.mlf), max_load(x.max_load) { /* Copy ctor just takes the internal configuration objects from x. The rest * is done in subsequent call to copy_(). */ } hashed_index( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, do_not_copy_elements_tag): super(x,do_not_copy_elements_tag()), #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) safe_super(), #endif key(x.key), hash_(x.hash_), eq_(x.eq_), buckets(x.get_allocator(),header()->impl(),0), mlf(1.0f) { calculate_max_load(); } ~hashed_index() { /* the container is guaranteed to be empty by now */ } #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) iterator make_iterator(node_type* node) { return iterator(node,this); } const_iterator make_iterator(node_type* node)const { return const_iterator(node,const_cast<hashed_index*>(this)); } #else iterator make_iterator(node_type* node) { return iterator(node); } const_iterator make_iterator(node_type* node)const { return const_iterator(node); } #endif local_iterator make_local_iterator(node_type* node) { return local_iterator(node); } const_local_iterator make_local_iterator(node_type* node)const { return const_local_iterator(node); } void copy_( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, const copy_map_type& map) { copy_(x,map,Category()); } void copy_( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, const copy_map_type& map,hashed_unique_tag) { if(x.size()!=0){ node_impl_pointer end_org=x.header()->impl(), org=end_org, cpy=header()->impl(); do{ node_impl_pointer prev_org=org->prior(), prev_cpy= static_cast<node_type*>(map.find(static_cast<final_node_type*>( node_type::from_impl(prev_org))))->impl(); cpy->prior()=prev_cpy; if(node_alg::is_first_of_bucket(org)){ node_impl_base_pointer buc_org=prev_org->next(), buc_cpy= buckets.begin()+(buc_org-x.buckets.begin()); prev_cpy->next()=buc_cpy; buc_cpy->prior()=cpy; } else{ prev_cpy->next()=node_impl_type::base_pointer_from(cpy); } org=prev_org; cpy=prev_cpy; }while(org!=end_org); } super::copy_(x,map); } void copy_( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, const copy_map_type& map,hashed_non_unique_tag) { if(x.size()!=0){ node_impl_pointer end_org=x.header()->impl(), org=end_org, cpy=header()->impl(); do{ node_impl_pointer next_org=node_alg::after(org), next_cpy= static_cast<node_type*>(map.find(static_cast<final_node_type*>( node_type::from_impl(next_org))))->impl(); if(node_alg::is_first_of_bucket(next_org)){ node_impl_base_pointer buc_org=org->next(), buc_cpy= buckets.begin()+(buc_org-x.buckets.begin()); cpy->next()=buc_cpy; buc_cpy->prior()=next_cpy; next_cpy->prior()=cpy; } else{ if(org->next()==node_impl_type::base_pointer_from(next_org)){ cpy->next()=node_impl_type::base_pointer_from(next_cpy); } else{ cpy->next()= node_impl_type::base_pointer_from( static_cast<node_type*>(map.find(static_cast<final_node_type*>( node_type::from_impl( node_impl_type::pointer_from(org->next())))))->impl()); } if(next_org->prior()!=org){ next_cpy->prior()= static_cast<node_type*>(map.find(static_cast<final_node_type*>( node_type::from_impl(next_org->prior()))))->impl(); } else{ next_cpy->prior()=cpy; } } org=next_org; cpy=next_cpy; }while(org!=end_org); } super::copy_(x,map); } template<typename Variant> final_node_type* insert_( value_param_type v,final_node_type*& x,Variant variant) { reserve_for_insert(size()+1); std::size_t buc=find_bucket(v); link_info pos(buckets.at(buc)); if(!link_point(v,pos)){ return static_cast<final_node_type*>( node_type::from_impl(node_impl_type::pointer_from(pos))); } final_node_type* res=super::insert_(v,x,variant); if(res==x)link(static_cast<node_type*>(x),pos); return res; } template<typename Variant> final_node_type* insert_( value_param_type v,node_type* position,final_node_type*& x,Variant variant) { reserve_for_insert(size()+1); std::size_t buc=find_bucket(v); link_info pos(buckets.at(buc)); if(!link_point(v,pos)){ return static_cast<final_node_type*>( node_type::from_impl(node_impl_type::pointer_from(pos))); } final_node_type* res=super::insert_(v,position,x,variant); if(res==x)link(static_cast<node_type*>(x),pos); return res; } void erase_(node_type* x) { unlink(x); super::erase_(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif } void delete_all_nodes_() { delete_all_nodes_(Category()); } void delete_all_nodes_(hashed_unique_tag) { for(node_impl_pointer x_end=header()->impl(),x=x_end->prior();x!=x_end;){ node_impl_pointer y=x->prior(); this->final_delete_node_( static_cast<final_node_type*>(node_type::from_impl(x))); x=y; } } void delete_all_nodes_(hashed_non_unique_tag) { for(node_impl_pointer x_end=header()->impl(),x=x_end->prior();x!=x_end;){ node_impl_pointer y=x->prior(); if(y->next()!=node_impl_type::base_pointer_from(x)&& y->next()->prior()!=x){ /* n-1 of group */ /* Make the second node prior() pointer back-linked so that it won't * refer to a deleted node when the time for its own destruction comes. */ node_impl_pointer first=node_impl_type::pointer_from(y->next()); first->next()->prior()=first; } this->final_delete_node_( static_cast<final_node_type*>(node_type::from_impl(x))); x=y; } } void clear_() { super::clear_(); buckets.clear(header()->impl()); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) safe_super::detach_dereferenceable_iterators(); #endif } void swap_( hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x) { std::swap(key,x.key); std::swap(hash_,x.hash_); std::swap(eq_,x.eq_); buckets.swap(x.buckets); std::swap(mlf,x.mlf); std::swap(max_load,x.max_load); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) safe_super::swap(x); #endif super::swap_(x); } void swap_elements_( hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x) { buckets.swap(x.buckets); std::swap(mlf,x.mlf); std::swap(max_load,x.max_load); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) safe_super::swap(x); #endif super::swap_elements_(x); } template<typename Variant> bool replace_(value_param_type v,node_type* x,Variant variant) { if(eq_(key(v),key(x->value()))){ return super::replace_(v,x,variant); } unlink_undo undo; unlink(x,undo); BOOST_TRY{ std::size_t buc=find_bucket(v); link_info pos(buckets.at(buc)); if(link_point(v,pos)&&super::replace_(v,x,variant)){ link(x,pos); return true; } undo(); return false; } BOOST_CATCH(...){ undo(); BOOST_RETHROW; } BOOST_CATCH_END } bool modify_(node_type* x) { std::size_t buc; bool b; BOOST_TRY{ buc=find_bucket(x->value()); b=in_place(x->impl(),key(x->value()),buc); } BOOST_CATCH(...){ erase_(x); BOOST_RETHROW; } BOOST_CATCH_END if(!b){ unlink(x); BOOST_TRY{ link_info pos(buckets.at(buc)); if(!link_point(x->value(),pos)){ super::erase_(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif return false; } link(x,pos); } BOOST_CATCH(...){ super::erase_(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif BOOST_RETHROW; } BOOST_CATCH_END } BOOST_TRY{ if(!super::modify_(x)){ unlink(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif return false; } else return true; } BOOST_CATCH(...){ unlink(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif BOOST_RETHROW; } BOOST_CATCH_END } bool modify_rollback_(node_type* x) { std::size_t buc=find_bucket(x->value()); if(in_place(x->impl(),key(x->value()),buc)){ return super::modify_rollback_(x); } unlink_undo undo; unlink(x,undo); BOOST_TRY{ link_info pos(buckets.at(buc)); if(link_point(x->value(),pos)&&super::modify_rollback_(x)){ link(x,pos); return true; } undo(); return false; } BOOST_CATCH(...){ undo(); BOOST_RETHROW; } BOOST_CATCH_END } /* comparison */ #if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) /* defect macro refers to class, not function, templates, but anyway */ template<typename K,typename H,typename P,typename S,typename T,typename C> friend bool operator==( const hashed_index<K,H,P,S,T,C>&,const hashed_index<K,H,P,S,T,C>& y); #endif bool equals(const hashed_index& x)const{return equals(x,Category());} bool equals(const hashed_index& x,hashed_unique_tag)const { if(size()!=x.size())return false; for(const_iterator it=begin(),it_end=end(),it2_end=x.end(); it!=it_end;++it){ const_iterator it2=x.find(key(*it)); if(it2==it2_end||!(*it==*it2))return false; } return true; } bool equals(const hashed_index& x,hashed_non_unique_tag)const { if(size()!=x.size())return false; for(const_iterator it=begin(),it_end=end();it!=it_end;){ const_iterator it2,it2_last; boost::tie(it2,it2_last)=x.equal_range(key(*it)); if(it2==it2_last)return false; const_iterator it_last=make_iterator( node_type::from_impl(end_of_range(it.get_node()->impl()))); if(std::distance(it,it_last)!=std::distance(it2,it2_last))return false; /* From is_permutation code in * http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3068.pdf */ for(;it!=it_last;++it,++it2){ if(!(*it==*it2))break; } if(it!=it_last){ for(const_iterator scan=it;scan!=it_last;++scan){ if(std::find(it,scan,*scan)!=scan)continue; std::ptrdiff_t matches=std::count(it2,it2_last,*scan); if(matches==0||matches!=std::count(scan,it_last,*scan))return false; } it=it_last; } } return true; } #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION) /* serialization */ template<typename Archive> void save_( Archive& ar,const unsigned int version,const index_saver_type& sm)const { ar<<serialization::make_nvp("position",buckets); super::save_(ar,version,sm); } template<typename Archive> void load_(Archive& ar,const unsigned int version,const index_loader_type& lm) { ar>>serialization::make_nvp("position",buckets); super::load_(ar,version,lm); } #endif #if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING) /* invariant stuff */ bool invariant_()const { if(size()==0||begin()==end()){ if(size()!=0||begin()!=end())return false; } else{ size_type s0=0; for(const_iterator it=begin(),it_end=end();it!=it_end;++it,++s0){} if(s0!=size())return false; size_type s1=0; for(size_type buc=0;buc<bucket_count();++buc){ size_type ss1=0; for(const_local_iterator it=begin(buc),it_end=end(buc); it!=it_end;++it,++ss1){ if(find_bucket(*it)!=buc)return false; } if(ss1!=bucket_size(buc))return false; s1+=ss1; } if(s1!=size())return false; } return super::invariant_(); } /* This forwarding function eases things for the boost::mem_fn construct * in BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT. Actually, * final_check_invariant is already an inherited member function of index. */ void check_invariant_()const{this->final_check_invariant_();} #endif private: node_type* header()const{return this->final_header();} std::size_t find_bucket(value_param_type v)const { return bucket(key(v)); } struct link_info_non_unique { link_info_non_unique(node_impl_base_pointer pos): first(pos),last(node_impl_base_pointer(0)){} operator const node_impl_base_pointer&()const{return this->first;} node_impl_base_pointer first,last; }; typedef typename mpl::if_< is_same<Category,hashed_unique_tag>, node_impl_base_pointer, link_info_non_unique >::type link_info; bool link_point(value_param_type v,link_info& pos) { return link_point(v,pos,Category()); } bool link_point( value_param_type v,node_impl_base_pointer& pos,hashed_unique_tag) { for(node_impl_pointer x=pos->prior();x!=node_impl_pointer(0); x=node_alg::after_local(x)){ if(eq_(key(v),key(node_type::from_impl(x)->value()))){ pos=node_impl_type::base_pointer_from(x); return false; } } return true; } bool link_point( value_param_type v,link_info_non_unique& pos,hashed_non_unique_tag) { for(node_impl_pointer x=pos.first->prior();x!=node_impl_pointer(0); x=node_alg::next_to_inspect(x)){ if(eq_(key(v),key(node_type::from_impl(x)->value()))){ pos.first=node_impl_type::base_pointer_from(x); pos.last=node_impl_type::base_pointer_from(last_of_range(x)); return true; } } return true; } node_impl_pointer last_of_range(node_impl_pointer x)const { return last_of_range(x,Category()); } node_impl_pointer last_of_range(node_impl_pointer x,hashed_unique_tag)const { return x; } node_impl_pointer last_of_range( node_impl_pointer x,hashed_non_unique_tag)const { node_impl_base_pointer y=x->next(); node_impl_pointer z=y->prior(); if(z==x){ /* range of size 1 or 2 */ node_impl_pointer yy=node_impl_type::pointer_from(y); return eq_( key(node_type::from_impl(x)->value()), key(node_type::from_impl(yy)->value()))?yy:x; } else if(z->prior()==x) /* last of bucket */ return x; else /* group of size>2 */ return z; } node_impl_pointer end_of_range(node_impl_pointer x)const { return end_of_range(x,Category()); } node_impl_pointer end_of_range(node_impl_pointer x,hashed_unique_tag)const { return node_alg::after(last_of_range(x)); } node_impl_pointer end_of_range( node_impl_pointer x,hashed_non_unique_tag)const { node_impl_base_pointer y=x->next(); node_impl_pointer z=y->prior(); if(z==x){ /* range of size 1 or 2 */ node_impl_pointer yy=node_impl_type::pointer_from(y); if(!eq_( key(node_type::from_impl(x)->value()), key(node_type::from_impl(yy)->value())))yy=x; return yy->next()->prior()==yy? node_impl_type::pointer_from(yy->next()): yy->next()->prior(); } else if(z->prior()==x) /* last of bucket */ return z; else /* group of size>2 */ return z->next()->prior()==z? node_impl_type::pointer_from(z->next()): z->next()->prior(); } void link(node_type* x,const link_info& pos) { link(x,pos,Category()); } void link(node_type* x,node_impl_base_pointer pos,hashed_unique_tag) { node_alg::link(x->impl(),pos,header()->impl()); } void link(node_type* x,const link_info_non_unique& pos,hashed_non_unique_tag) { if(pos.last==node_impl_base_pointer(0)){ node_alg::link(x->impl(),pos.first,header()->impl()); } else{ node_alg::link( x->impl(), node_impl_type::pointer_from(pos.first), node_impl_type::pointer_from(pos.last)); } } void unlink(node_type* x) { node_alg::unlink(x->impl()); } typedef typename node_alg::unlink_undo unlink_undo; void unlink(node_type* x,unlink_undo& undo) { node_alg::unlink(x->impl(),undo); } void calculate_max_load() { float fml=static_cast<float>(mlf*bucket_count()); max_load=(std::numeric_limits<size_type>::max)(); if(max_load>fml)max_load=static_cast<size_type>(fml); } void reserve_for_insert(size_type n) { if(n>max_load){ size_type bc =(std::numeric_limits<size_type>::max)(); float fbc=static_cast<float>(1+static_cast<double>(n)/mlf); if(bc>fbc)bc =static_cast<size_type>(fbc); unchecked_rehash(bc); } } void unchecked_rehash(size_type n){unchecked_rehash(n,Category());} void unchecked_rehash(size_type n,hashed_unique_tag) { node_impl_type cpy_end_node; node_impl_pointer cpy_end=node_impl_pointer(&cpy_end_node), end_=header()->impl(); bucket_array_type buckets_cpy(get_allocator(),cpy_end,n); if(size()!=0){ auto_space< std::size_t,allocator_type> hashes(get_allocator(),size()); auto_space< node_impl_pointer,allocator_type> node_ptrs(get_allocator(),size()); std::size_t i=0,size_=size(); bool within_bucket=false; BOOST_TRY{ for(;i!=size_;++i){ node_impl_pointer x=end_->prior(); /* only this can possibly throw */ std::size_t h=hash_(key(node_type::from_impl(x)->value())); hashes.data()[i]=h; node_ptrs.data()[i]=x; within_bucket=!node_alg::unlink_last(end_); node_alg::link(x,buckets_cpy.at(buckets_cpy.position(h)),cpy_end); } } BOOST_CATCH(...){ if(i!=0){ std::size_t prev_buc=buckets.position(hashes.data()[i-1]); if(!within_bucket)prev_buc=~prev_buc; for(std::size_t j=i;j--;){ std::size_t buc=buckets.position(hashes.data()[j]); node_impl_pointer x=node_ptrs.data()[j]; if(buc==prev_buc)node_alg::append(x,end_); else node_alg::link(x,buckets.at(buc),end_); prev_buc=buc; } } BOOST_RETHROW; } BOOST_CATCH_END } end_->prior()=cpy_end->prior()!=cpy_end?cpy_end->prior():end_; end_->next()=cpy_end->next(); end_->prior()->next()->prior()=end_->next()->prior()->prior()=end_; buckets.swap(buckets_cpy); calculate_max_load(); } void unchecked_rehash(size_type n,hashed_non_unique_tag) { node_impl_type cpy_end_node; node_impl_pointer cpy_end=node_impl_pointer(&cpy_end_node), end_=header()->impl(); bucket_array_type buckets_cpy(get_allocator(),cpy_end,n); if(size()!=0){ auto_space< std::size_t,allocator_type> hashes(get_allocator(),size()); auto_space< node_impl_pointer,allocator_type> node_ptrs(get_allocator(),size()); std::size_t i=0; bool within_bucket=false; BOOST_TRY{ for(;;++i){ node_impl_pointer x=end_->prior(); if(x==end_)break; /* only this can possibly throw */ std::size_t h=hash_(key(node_type::from_impl(x)->value())); hashes.data()[i]=h; node_ptrs.data()[i]=x; std::pair<node_impl_pointer,bool> p= node_alg::unlink_last_group(end_); node_alg::link_range( p.first,x,buckets_cpy.at(buckets_cpy.position(h)),cpy_end); within_bucket=!(p.second); } } BOOST_CATCH(...){ if(i!=0){ std::size_t prev_buc=buckets.position(hashes.data()[i-1]); if(!within_bucket)prev_buc=~prev_buc; for(std::size_t j=i;j--;){ std::size_t buc=buckets.position(hashes.data()[j]); node_impl_pointer x=node_ptrs.data()[j], y= x->prior()->next()!=node_impl_type::base_pointer_from(x)&& x->prior()->next()->prior()!=x? node_impl_type::pointer_from(x->prior()->next()):x; node_alg::unlink_range(y,x); if(buc==prev_buc)node_alg::append_range(y,x,end_); else node_alg::link_range(y,x,buckets.at(buc),end_); prev_buc=buc; } } BOOST_RETHROW; } BOOST_CATCH_END } end_->prior()=cpy_end->prior()!=cpy_end?cpy_end->prior():end_; end_->next()=cpy_end->next(); end_->prior()->next()->prior()=end_->next()->prior()->prior()=end_; buckets.swap(buckets_cpy); calculate_max_load(); } bool in_place(node_impl_pointer x,key_param_type k,std::size_t buc)const { return in_place(x,k,buc,Category()); } bool in_place( node_impl_pointer x,key_param_type k,std::size_t buc, hashed_unique_tag)const { bool found=false; for(node_impl_pointer y=buckets.at(buc)->prior(); y!=node_impl_pointer(0);y=node_alg::after_local(y)){ if(y==x)found=true; else if(eq_(k,key(node_type::from_impl(y)->value())))return false; } return found; } bool in_place( node_impl_pointer x,key_param_type k,std::size_t buc, hashed_non_unique_tag)const { bool found=false; int range_size=0; for(node_impl_pointer y=buckets.at(buc)->prior();y!=node_impl_pointer(0);){ if(node_alg::is_first_of_group(y)){ /* group of 3 or more */ if(y==x){ /* in place <-> equal to some other member of the group */ return eq_( k, key(node_type::from_impl( node_impl_type::pointer_from(y->next()))->value())); } else{ node_impl_pointer z= node_alg::after_local(y->next()->prior()); /* end of range */ if(eq_(k,key(node_type::from_impl(y)->value()))){ if(found)return false; /* x lies outside */ do{ if(y==x)return true; y=node_alg::after_local(y); }while(y!=z); return false; /* x not found */ } else{ if(range_size==1&&!found)return false; if(range_size==2)return found; range_size=0; y=z; /* skip range (and potentially x, too, which is fine) */ } } } else{ /* group of 1 or 2 */ if(y==x){ if(range_size==1)return true; range_size=1; found=true; } else if(eq_(k,key(node_type::from_impl(y)->value()))){ if(range_size==0&&found)return false; if(range_size==1&&!found)return false; if(range_size==2)return false; ++range_size; } else{ if(range_size==1&&!found)return false; if(range_size==2)return found; range_size=0; } y=node_alg::after_local(y); } } return found; } #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) void detach_iterators(node_type* x) { iterator it=make_iterator(x); safe_mode::detach_equivalent_iterators(it); } #endif template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK> std::pair<iterator,bool> emplace_impl(BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::pair<final_node_type*,bool>p= this->final_emplace_(BOOST_MULTI_INDEX_FORWARD_PARAM_PACK); return std::pair<iterator,bool>(make_iterator(p.first),p.second); } template<BOOST_MULTI_INDEX_TEMPLATE_PARAM_PACK> iterator emplace_hint_impl( iterator position,BOOST_MULTI_INDEX_FUNCTION_PARAM_PACK) { BOOST_MULTI_INDEX_CHECK_VALID_ITERATOR(position); BOOST_MULTI_INDEX_CHECK_IS_OWNER(position,*this); BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; std::pair<final_node_type*,bool>p= this->final_emplace_hint_( static_cast<final_node_type*>(position.get_node()), BOOST_MULTI_INDEX_FORWARD_PARAM_PACK); return make_iterator(p.first); } key_from_value key; hasher hash_; key_equal eq_; bucket_array_type buckets; float mlf; size_type max_load; #if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\ BOOST_WORKAROUND(__MWERKS__,<=0x3003) #pragma parse_mfunc_templ reset #endif }; /* comparison */ template< typename KeyFromValue,typename Hash,typename Pred, typename SuperMeta,typename TagList,typename Category > bool operator==( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& y) { return x.equals(y); } template< typename KeyFromValue,typename Hash,typename Pred, typename SuperMeta,typename TagList,typename Category > bool operator!=( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& y) { return !(x==y); } /* specialized algorithms */ template< typename KeyFromValue,typename Hash,typename Pred, typename SuperMeta,typename TagList,typename Category > void swap( hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& y) { x.swap(y); } } /* namespace multi_index::detail */ /* hashed index specifiers */ template<typename Arg1,typename Arg2,typename Arg3,typename Arg4> struct hashed_unique { typedef typename detail::hashed_index_args< Arg1,Arg2,Arg3,Arg4> index_args; typedef typename index_args::tag_list_type::type tag_list_type; typedef typename index_args::key_from_value_type key_from_value_type; typedef typename index_args::hash_type hash_type; typedef typename index_args::pred_type pred_type; template<typename Super> struct node_class { typedef detail::hashed_index_node<Super,detail::hashed_unique_tag> type; }; template<typename SuperMeta> struct index_class { typedef detail::hashed_index< key_from_value_type,hash_type,pred_type, SuperMeta,tag_list_type,detail::hashed_unique_tag> type; }; }; template<typename Arg1,typename Arg2,typename Arg3,typename Arg4> struct hashed_non_unique { typedef typename detail::hashed_index_args< Arg1,Arg2,Arg3,Arg4> index_args; typedef typename index_args::tag_list_type::type tag_list_type; typedef typename index_args::key_from_value_type key_from_value_type; typedef typename index_args::hash_type hash_type; typedef typename index_args::pred_type pred_type; template<typename Super> struct node_class { typedef detail::hashed_index_node< Super,detail::hashed_non_unique_tag> type; }; template<typename SuperMeta> struct index_class { typedef detail::hashed_index< key_from_value_type,hash_type,pred_type, SuperMeta,tag_list_type,detail::hashed_non_unique_tag> type; }; }; } /* namespace multi_index */ } /* namespace boost */ /* Boost.Foreach compatibility */ template< typename KeyFromValue,typename Hash,typename Pred, typename SuperMeta,typename TagList,typename Category > inline boost::mpl::true_* boost_foreach_is_noncopyable( boost::multi_index::detail::hashed_index< KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>*&, boost::foreach::tag) { return 0; } #undef BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT #undef BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT_OF #endif