boost/multi_index/hashed_index.hpp
/* Copyright 2003-2010 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)&&(_MSC_VER>=1200) #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/limits.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/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_ctr_proxy.hpp> #include <boost/multi_index/detail/safe_mode.hpp> #include <boost/multi_index/detail/scope_guard.hpp> #include <boost/multi_index/hashed_index_fwd.hpp> #include <boost/tuple/tuple.hpp> #include <cstddef> #include <functional> #include <utility> #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 \ detail::scope_guard BOOST_JOIN(check_invariant_,__LINE__)= \ detail::make_obj_guard(*this,&hashed_index::check_invariant_); \ BOOST_JOIN(check_invariant_,__LINE__).touch(); #else #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 * these tags. */ struct hashed_unique_tag{}; struct hashed_non_unique_tag{}; 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) #if BOOST_WORKAROUND(BOOST_MSVC,<1300) ,public safe_ctr_proxy_impl< hashed_index_iterator< hashed_index_node<typename SuperMeta::type::node_type>, bucket_array<typename SuperMeta::type::final_allocator_type> >, hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category> > #else ,public safe_mode::safe_container< hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category> > #endif #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> node_type; private: typedef typename node_type::impl_type node_impl_type; typedef typename node_impl_type::pointer node_impl_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) #if BOOST_WORKAROUND(BOOST_MSVC,<1300) typedef safe_mode::safe_iterator< hashed_index_iterator< node_type,bucket_array_type>, safe_ctr_proxy< hashed_index_iterator< node_type,bucket_array_type> > > iterator; #else typedef safe_mode::safe_iterator< hashed_index_iterator< node_type,bucket_array_type>, hashed_index> iterator; #endif #else typedef hashed_index_iterator< node_type,bucket_array_type> iterator; #endif typedef iterator const_iterator; typedef iterator local_iterator; typedef const_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) #if BOOST_WORKAROUND(BOOST_MSVC,<1300) typedef safe_ctr_proxy_impl< hashed_index_iterator< node_type,bucket_array_type>, hashed_index> safe_super; #else typedef safe_mode::safe_container< hashed_index> safe_super; #endif #endif typedef typename call_traits<value_type>::param_type value_param_type; typedef typename call_traits< key_type>::param_type key_param_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; } allocator_type get_allocator()const { return this->final().get_allocator(); } /* size and capacity */ bool empty()const{return this->final_empty_();} size_type size()const{return this->final_size_();} size_type max_size()const{return this->final_max_size_();} /* iterators */ iterator begin() { return make_iterator( node_type::from_impl(buckets.at(first_bucket)->next())); } const_iterator begin()const { return make_iterator( node_type::from_impl(buckets.at(first_bucket)->next())); } iterator end(){return make_iterator(header());} const_iterator end()const{return make_iterator(header());} const_iterator cbegin()const{return begin();} const_iterator cend()const{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 */ std::pair<iterator,bool> insert(value_param_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); } iterator insert(iterator position,value_param_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); } template<typename InputIterator> void insert(InputIterator first,InputIterator last) { BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT; iterator hint=end(); for(;first!=last;++first)hint=insert(hint,*first); } 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; size_type s=0; std::size_t buc=buckets.position(hash(k)); node_impl_pointer x=buckets.at(buc); node_impl_pointer y=x->next(); while(y!=x){ if(eq(k,key(node_type::from_impl(y)->value()))){ bool b; do{ node_impl_pointer z=y->next(); b=z!=x&&eq( key(node_type::from_impl(y)->value()), key(node_type::from_impl(z)->value())); this->final_erase_( static_cast<final_node_type*>(node_type::from_impl(y))); y=z; ++s; }while(b); break; } y=y->next(); } return s; } 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,value_param_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())); } 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_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; 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)); node_impl_pointer x=buckets.at(buc); node_impl_pointer y=x->next(); while(y!=x){ if(eq(k,key(node_type::from_impl(y)->value()))){ return make_iterator(node_type::from_impl(y)); } y=y->next(); } 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 { size_type res=0; std::size_t buc=buckets.position(hash(k)); node_impl_pointer x=buckets.at(buc); node_impl_pointer y=x->next(); while(y!=x){ if(eq(k,key(node_type::from_impl(y)->value()))){ do{ ++res; y=y->next(); }while(y!=x&&eq(k,key(node_type::from_impl(y)->value()))); break; } y=y->next(); } return res; } 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)); node_impl_pointer x=buckets.at(buc); node_impl_pointer y=x->next(); while(y!=x){ if(eq(k,key(node_type::from_impl(y)->value()))){ node_impl_pointer y0=y; do{ y=y->next(); }while(y!=x&&eq(k,key(node_type::from_impl(y)->value()))); if(y==x){ do{ ++y; }while(y==y->next()); y=y->next(); } return std::pair<iterator,iterator>( make_iterator(node_type::from_impl(y0)), make_iterator(node_type::from_impl(y))); } y=y->next(); } return std::pair<iterator,iterator>(end(),end()); } /* bucket interface */ size_type bucket_count()const{return buckets.size();} size_type max_bucket_count()const{return static_cast<size_type>(-1);} size_type bucket_size(size_type n)const { size_type res=0; node_impl_pointer x=buckets.at(n); node_impl_pointer y=x->next(); while(y!=x){ ++res; y=y->next(); } 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); node_impl_pointer y=x->next(); if(y==x)return end(); return make_iterator(node_type::from_impl(y)); } local_iterator end(size_type n) { return const_cast<const hashed_index*>(this)->end(n); } const_local_iterator end(size_type n)const { node_impl_pointer x=buckets.at(n); if(x==x->next())return end(); do{ ++x; }while(x==x->next()); return make_iterator(node_type::from_impl(x->next())); } 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_iterator(node_from_value<node_type>(&x)); } const_local_iterator local_iterator_to(const value_type& x)const { return make_iterator(node_from_value<node_type>(&x)); } /* hash policy */ float load_factor()const{return static_cast<float>(size())/bucket_count();} float max_load_factor()const{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); } 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(1.0), first_bucket(buckets.size()) { 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), first_bucket(x.first_bucket) { /* Copy ctor just takes the internal configuration objects from x. The rest * is done in subsequent call to copy_(). */ } ~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,&buckets,this); } const_iterator make_iterator(node_type* node)const { return const_iterator( node, &const_cast<bucket_array_type&>(buckets), const_cast<hashed_index*>(this)); } #else iterator make_iterator(node_type* node) { return iterator(node,&buckets); } const_iterator make_iterator(node_type* node)const { return const_iterator(node,&const_cast<bucket_array_type&>(buckets)); } #endif void copy_( const hashed_index<KeyFromValue,Hash,Pred,SuperMeta,TagList,Category>& x, const copy_map_type& map) { for(node_impl_pointer begin_org=x.buckets.begin(), begin_cpy=buckets.begin(), end_org=x.buckets.end(); begin_org!=end_org;++begin_org,++begin_cpy){ node_impl_pointer next_org=begin_org->next(); node_impl_pointer cpy=begin_cpy; while(next_org!=begin_org){ cpy->next()= static_cast<node_type*>( map.find( static_cast<final_node_type*>( node_type::from_impl(next_org))))->impl(); next_org=next_org->next(); cpy=cpy->next(); } cpy->next()=begin_cpy; } super::copy_(x,map); } node_type* insert_(value_param_type v,node_type* x) { reserve(size()+1); std::size_t buc=find_bucket(v); node_impl_pointer pos=buckets.at(buc); if(!link_point(v,pos,Category()))return node_type::from_impl(pos); node_type* res=static_cast<node_type*>(super::insert_(v,x)); if(res==x){ link(x,pos); if(first_bucket>buc)first_bucket=buc; } return res; } node_type* insert_(value_param_type v,node_type* position,node_type* x) { reserve(size()+1); std::size_t buc=find_bucket(v); node_impl_pointer pos=buckets.at(buc); if(!link_point(v,pos,Category()))return node_type::from_impl(pos); node_type* res=static_cast<node_type*>(super::insert_(v,position,x)); if(res==x){ link(x,pos); if(first_bucket>buc)first_bucket=buc; } return res; } void erase_(node_type* x) { unlink(x); first_bucket=buckets.first_nonempty(first_bucket); super::erase_(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif } void delete_all_nodes_() { for(node_impl_pointer x=buckets.begin(),x_end=buckets.end(); x!=x_end;++x){ node_impl_pointer y=x->next(); while(y!=x){ node_impl_pointer z=y->next(); this->final_delete_node_( static_cast<final_node_type*>(node_type::from_impl(y))); y=z; } } } void clear_() { super::clear_(); buckets.clear(); first_bucket=buckets.size(); #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); std::swap(first_bucket,x.first_bucket); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) safe_super::swap(x); #endif super::swap_(x); } bool replace_(value_param_type v,node_type* x) { if(eq(key(v),key(x->value()))){ return super::replace_(v,x); } node_impl_pointer y=prev(x); unlink_next(y); BOOST_TRY{ std::size_t buc=find_bucket(v); node_impl_pointer pos=buckets.at(buc); if(link_point(v,pos,Category())&&super::replace_(v,x)){ link(x,pos); if(first_bucket>buc){ first_bucket=buc; } else if(first_bucket<buc){ first_bucket=buckets.first_nonempty(first_bucket); } return true; } link(x,y); return false; } BOOST_CATCH(...){ link(x,y); 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,Category()); } BOOST_CATCH(...){ erase_(x); BOOST_RETHROW; } BOOST_CATCH_END if(!b){ unlink(x); BOOST_TRY{ node_impl_pointer pos=buckets.at(buc); if(!link_point(x->value(),pos,Category())){ first_bucket=buckets.first_nonempty(first_bucket); super::erase_(x); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif return false; } link(x,pos); if(first_bucket>buc){ first_bucket=buc; } else if(first_bucket<buc){ first_bucket=buckets.first_nonempty(first_bucket); } } BOOST_CATCH(...){ first_bucket=buckets.first_nonempty(first_bucket); 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); first_bucket=buckets.first_nonempty(first_bucket); #if defined(BOOST_MULTI_INDEX_ENABLE_SAFE_MODE) detach_iterators(x); #endif return false; } else return true; } BOOST_CATCH(...){ unlink(x); first_bucket=buckets.first_nonempty(first_bucket); #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,Category())){ return super::modify_rollback_(x); } node_impl_pointer y=prev(x); unlink_next(y); BOOST_TRY{ node_impl_pointer pos=buckets.at(buc); if(link_point(x->value(),pos,Category())&&super::modify_rollback_(x)){ link(x,pos); if(first_bucket>buc){ first_bucket=buc; } else if(first_bucket<buc){ first_bucket=buckets.first_nonempty(first_bucket); } return true; } link(x,y); return false; } BOOST_CATCH(...){ link(x,y); BOOST_RETHROW; } BOOST_CATCH_END } #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; } if(first_bucket!=buckets.first_nonempty(0))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)); } bool link_point( value_param_type v,node_impl_pointer& pos,hashed_unique_tag) { node_impl_pointer x=pos->next(); while(x!=pos){ if(eq(key(v),key(node_type::from_impl(x)->value()))){ pos=x; return false; } x=x->next(); } return true; } bool link_point( value_param_type v,node_impl_pointer& pos,hashed_non_unique_tag) { node_impl_pointer prev=pos; node_impl_pointer x=pos->next(); while(x!=pos){ if(eq(key(v),key(node_type::from_impl(x)->value()))){ pos=prev; return true; } prev=x; x=x->next(); } return true; } static void link(node_type* x,node_impl_pointer pos) { node_impl_type::link(x->impl(),pos); }; static void link(node_impl_pointer x,node_impl_pointer pos) { node_impl_type::link(x,pos); }; static void unlink(node_type* x) { node_impl_type::unlink(x->impl()); }; static node_impl_pointer prev(node_type* x) { return node_impl_type::prev(x->impl()); } static node_impl_pointer prev_from(node_type* x,node_impl_pointer y) { return node_impl_type::prev_from(x->impl(),y); } static void unlink_next(node_impl_pointer x) { node_impl_type::unlink_next(x); } 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(size_type n) { if(n>max_load){ size_type bc =(std::numeric_limits<size_type>::max)(); float fbc=static_cast<float>(1+n/mlf); if(bc>fbc)bc =static_cast<size_type>(fbc); unchecked_rehash(bc); } } void unchecked_rehash(size_type n) { bucket_array_type buckets1(get_allocator(),header()->impl(),n); auto_space<std::size_t,allocator_type> hashes(get_allocator(),size()); std::size_t i=0; node_impl_pointer x=buckets.begin(); node_impl_pointer x_end=buckets.end(); for(;x!=x_end;++x){ node_impl_pointer y=x->next(); while(y!=x){ hashes.data()[i++]=hash(key(node_type::from_impl(y)->value())); y=y->next(); } } i=0; x=buckets.begin(); for(;x!=x_end;++x){ node_impl_pointer y=x->next(); while(y!=x){ node_impl_pointer z=y->next(); std::size_t buc1=buckets1.position(hashes.data()[i++]); node_impl_pointer x1=buckets1.at(buc1); link(y,x1); y=z; } } buckets.swap(buckets1); calculate_max_load(); first_bucket=buckets.first_nonempty(0); } bool in_place( node_impl_pointer x,key_param_type k,std::size_t buc, hashed_unique_tag)const { std::less_equal<node_impl_pointer> leq; node_impl_pointer bbegin=buckets.begin(); node_impl_pointer bend=buckets.end(); node_impl_pointer pbuc=x->next(); while(!leq(bbegin,pbuc)||!leq(pbuc,bend))pbuc=pbuc->next(); if(buc!=static_cast<std::size_t>(pbuc-bbegin))return false; node_impl_pointer y=x; while(y->next()!=x){ y=y->next(); if(y==pbuc)continue; if(eq(k,key(node_type::from_impl(y)->value())))return false; } return true; } bool in_place( node_impl_pointer x,key_param_type k,std::size_t buc, hashed_non_unique_tag)const { std::less_equal<node_impl_pointer> leq; node_impl_pointer bbegin=buckets.begin(); node_impl_pointer bend=buckets.end(); node_impl_pointer pbuc=x->next(); while(!leq(bbegin,pbuc)||!leq(pbuc,bend))pbuc=pbuc->next(); if(buc!=static_cast<std::size_t>(pbuc-bbegin))return false; node_impl_pointer y=x->next(); if(y!=pbuc){ if(eq(k,key(node_type::from_impl(y)->value()))){ /* adjacent to equivalent element -> in place */ return true; } else{ y=y->next(); while(y!=pbuc){ if(eq(k,key(node_type::from_impl(y)->value())))return false; y=y->next(); } } } while(y->next()!=x){ y=y->next(); if(eq(k,key(node_type::from_impl(y)->value()))){ while(y->next()!=x){ y=y->next(); if(!eq(k,key(node_type::from_impl(y)->value())))return false; } /* after a group of equivalent elements --> in place */ return true; } } return true; } #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 key_from_value key; hasher hash; key_equal eq; bucket_array_type buckets; float mlf; size_type max_load; std::size_t first_bucket; #if defined(BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING)&&\ BOOST_WORKAROUND(__MWERKS__,<=0x3003) #pragma parse_mfunc_templ reset #endif }; /* 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> 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> 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 */ #undef BOOST_MULTI_INDEX_HASHED_INDEX_CHECK_INVARIANT #endif