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Diffstat (limited to 'src/third_party/boost-1.56.0/boost/intrusive/hashtable.hpp')
| -rw-r--r-- | src/third_party/boost-1.56.0/boost/intrusive/hashtable.hpp | 3192 |
1 files changed, 0 insertions, 3192 deletions
diff --git a/src/third_party/boost-1.56.0/boost/intrusive/hashtable.hpp b/src/third_party/boost-1.56.0/boost/intrusive/hashtable.hpp deleted file mode 100644 index 8ada6e79cad..00000000000 --- a/src/third_party/boost-1.56.0/boost/intrusive/hashtable.hpp +++ /dev/null @@ -1,3192 +0,0 @@ -///////////////////////////////////////////////////////////////////////////// -// -// (C) Copyright Ion Gaztanaga 2006-2013 -// -// 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/intrusive for documentation. -// -///////////////////////////////////////////////////////////////////////////// -#ifndef BOOST_INTRUSIVE_HASHTABLE_HPP -#define BOOST_INTRUSIVE_HASHTABLE_HPP - -#include <boost/intrusive/detail/config_begin.hpp> -#include <boost/intrusive/intrusive_fwd.hpp> -//std C++ -#include <functional> //std::equal_to -#include <utility> //std::pair -#include <algorithm> //std::swap, std::lower_bound, std::upper_bound -#include <cstddef> //std::size_t -//boost -#include <boost/intrusive/detail/assert.hpp> -#include <boost/static_assert.hpp> -#include <boost/functional/hash.hpp> -//General intrusive utilities -#include <boost/intrusive/detail/hashtable_node.hpp> -#include <boost/intrusive/detail/transform_iterator.hpp> -#include <boost/intrusive/link_mode.hpp> -#include <boost/intrusive/detail/ebo_functor_holder.hpp> -#include <boost/intrusive/detail/utilities.hpp> -//Implementation utilities -#include <boost/intrusive/unordered_set_hook.hpp> -#include <boost/intrusive/slist.hpp> -#include <boost/intrusive/pointer_traits.hpp> -#include <boost/intrusive/detail/mpl.hpp> -#include <boost/move/move.hpp> - -namespace boost { -namespace intrusive { - -/// @cond - -struct hash_bool_flags -{ - static const std::size_t unique_keys_pos = 1u; - static const std::size_t constant_time_size_pos = 2u; - static const std::size_t power_2_buckets_pos = 4u; - static const std::size_t cache_begin_pos = 8u; - static const std::size_t compare_hash_pos = 16u; - static const std::size_t incremental_pos = 32u; -}; - -namespace detail { - -template<class SupposedValueTraits> -struct get_slist_impl_from_supposed_value_traits -{ - typedef SupposedValueTraits value_traits; - typedef typename detail::get_node_traits - <value_traits>::type node_traits; - typedef typename get_slist_impl - <typename reduced_slist_node_traits - <node_traits>::type - >::type type; -}; - -template<class SupposedValueTraits> -struct unordered_bucket_impl -{ - typedef typename - get_slist_impl_from_supposed_value_traits - <SupposedValueTraits>::type slist_impl; - typedef detail::bucket_impl<slist_impl> implementation_defined; - typedef implementation_defined type; -}; - -template<class SupposedValueTraits> -struct unordered_bucket_ptr_impl -{ - typedef typename detail::get_node_traits - <SupposedValueTraits>::type::node_ptr node_ptr; - typedef typename unordered_bucket_impl - <SupposedValueTraits>::type bucket_type; - - typedef typename pointer_traits - <node_ptr>::template rebind_pointer - < bucket_type >::type implementation_defined; - typedef implementation_defined type; -}; - -template <class T> -struct store_hash_bool -{ - template<bool Add> - struct two_or_three {one _[2 + Add];}; - template <class U> static one test(...); - template <class U> static two_or_three<U::store_hash> test (int); - static const std::size_t value = sizeof(test<T>(0)); -}; - -template <class T> -struct store_hash_is_true -{ - static const bool value = store_hash_bool<T>::value > sizeof(one)*2; -}; - -template <class T> -struct optimize_multikey_bool -{ - template<bool Add> - struct two_or_three {one _[2 + Add];}; - template <class U> static one test(...); - template <class U> static two_or_three<U::optimize_multikey> test (int); - static const std::size_t value = sizeof(test<T>(0)); -}; - -template <class T> -struct optimize_multikey_is_true -{ - static const bool value = optimize_multikey_bool<T>::value > sizeof(one)*2; -}; - -struct insert_commit_data_impl -{ - std::size_t hash; -}; - -template<class Node, class SlistNodePtr> -inline typename pointer_traits<SlistNodePtr>::template rebind_pointer<Node>::type - dcast_bucket_ptr(const SlistNodePtr &p) -{ - typedef typename pointer_traits<SlistNodePtr>::template rebind_pointer<Node>::type node_ptr; - return pointer_traits<node_ptr>::pointer_to(static_cast<Node&>(*p)); -} - -template<class NodeTraits> -struct group_functions -{ - typedef NodeTraits node_traits; - typedef unordered_group_adapter<node_traits> group_traits; - typedef typename node_traits::node_ptr node_ptr; - typedef typename node_traits::node node; - typedef typename reduced_slist_node_traits - <node_traits>::type reduced_node_traits; - typedef typename reduced_node_traits::node_ptr slist_node_ptr; - typedef typename reduced_node_traits::node slist_node; - typedef circular_slist_algorithms<group_traits> group_algorithms; - - static slist_node_ptr get_bucket_before_begin - (const slist_node_ptr &bucket_beg, const slist_node_ptr &bucket_end, const node_ptr &p) - { - //First find the last node of p's group. - //This requires checking the first node of the next group or - //the bucket node. - node_ptr prev_node = p; - node_ptr nxt(node_traits::get_next(p)); - while(!(bucket_beg <= nxt && nxt <= bucket_end) && - (group_traits::get_next(nxt) == prev_node)){ - prev_node = nxt; - nxt = node_traits::get_next(nxt); - } - - //If we've reached the bucket node just return it. - if(bucket_beg <= nxt && nxt <= bucket_end){ - return nxt; - } - - //Otherwise, iterate using group links until the bucket node - node_ptr first_node_of_group = nxt; - node_ptr last_node_group = group_traits::get_next(first_node_of_group); - slist_node_ptr possible_end = node_traits::get_next(last_node_group); - - while(!(bucket_beg <= possible_end && possible_end <= bucket_end)){ - first_node_of_group = detail::dcast_bucket_ptr<node>(possible_end); - last_node_group = group_traits::get_next(first_node_of_group); - possible_end = node_traits::get_next(last_node_group); - } - return possible_end; - } - - static node_ptr get_prev_to_first_in_group(const slist_node_ptr &bucket_node, const node_ptr &first_in_group) - { - //Just iterate using group links and obtain the node - //before "first_in_group)" - node_ptr prev_node = detail::dcast_bucket_ptr<node>(bucket_node); - node_ptr nxt(node_traits::get_next(prev_node)); - while(nxt != first_in_group){ - prev_node = group_traits::get_next(nxt); - nxt = node_traits::get_next(prev_node); - } - return prev_node; - } - - static node_ptr get_first_in_group_of_last_in_group(const node_ptr &last_in_group) - { - //Just iterate using group links and obtain the node - //before "last_in_group" - node_ptr possible_first = group_traits::get_next(last_in_group); - node_ptr possible_first_prev = group_traits::get_next(possible_first); - // The deleted node is at the end of the group, so the - // node in the group pointing to it is at the beginning - // of the group. Find that to change its pointer. - while(possible_first_prev != last_in_group){ - possible_first = possible_first_prev; - possible_first_prev = group_traits::get_next(possible_first); - } - return possible_first; - } - - static void erase_from_group(const slist_node_ptr &end_ptr, const node_ptr &to_erase_ptr, detail::true_) - { - node_ptr nxt_ptr(node_traits::get_next(to_erase_ptr)); - node_ptr prev_in_group_ptr(group_traits::get_next(to_erase_ptr)); - bool last_in_group = (end_ptr == nxt_ptr) || - (group_traits::get_next(nxt_ptr) != to_erase_ptr); - bool is_first_in_group = node_traits::get_next(prev_in_group_ptr) != to_erase_ptr; - - if(is_first_in_group && last_in_group){ - group_algorithms::init(to_erase_ptr); - } - else if(is_first_in_group){ - group_algorithms::unlink_after(nxt_ptr); - } - else if(last_in_group){ - node_ptr first_in_group = - get_first_in_group_of_last_in_group(to_erase_ptr); - group_algorithms::unlink_after(first_in_group); - } - else{ - group_algorithms::unlink_after(nxt_ptr); - } - } - - static void erase_from_group(const slist_node_ptr&, const node_ptr&, detail::false_) - {} - - static node_ptr get_last_in_group(const node_ptr &first_in_group, detail::true_) - { return group_traits::get_next(first_in_group); } - - static node_ptr get_last_in_group(const node_ptr &n, detail::false_) - { return n; } - - static void init_group(const node_ptr &n, true_) - { group_algorithms::init(n); } - - static void init_group(const node_ptr &, false_) - {} - - static void insert_in_group(const node_ptr &first_in_group, const node_ptr &n, true_) - { - if(first_in_group){ - if(group_algorithms::unique(first_in_group)) - group_algorithms::link_after(first_in_group, n); - else{ - group_algorithms::link_after(group_algorithms::node_traits::get_next(first_in_group), n); - } - } - else{ - group_algorithms::init_header(n); - } - } - - static slist_node_ptr get_previous_and_next_in_group - ( const slist_node_ptr &i, node_ptr &nxt_in_group - //If first_end_ptr == last_end_ptr, then first_end_ptr is the bucket of i - //Otherwise first_end_ptr is the first bucket and last_end_ptr the last one. - , const slist_node_ptr &first_end_ptr, const slist_node_ptr &last_end_ptr) - { - slist_node_ptr prev; - node_ptr elem(detail::dcast_bucket_ptr<node>(i)); - - //It's the last in group if the next_node is a bucket - slist_node_ptr nxt(node_traits::get_next(elem)); - bool last_in_group = (first_end_ptr <= nxt && nxt <= last_end_ptr)/* || - (group_traits::get_next(nxt) != elem)*/; - //It's the first in group if group_previous's next_node is not - //itself, as group list does not link bucket - node_ptr prev_in_group(group_traits::get_next(elem)); - bool first_in_group = node_traits::get_next(prev_in_group) != elem; - - if(first_in_group){ - node_ptr start_pos; - if(last_in_group){ - start_pos = elem; - nxt_in_group = node_ptr(); - } - else{ - start_pos = prev_in_group; - nxt_in_group = node_traits::get_next(elem); - } - slist_node_ptr bucket_node; - if(first_end_ptr != last_end_ptr){ - bucket_node = group_functions::get_bucket_before_begin - (first_end_ptr, last_end_ptr, start_pos); - } - else{ - bucket_node = first_end_ptr; - } - prev = group_functions::get_prev_to_first_in_group(bucket_node, elem); - } - else{ - if(last_in_group){ - nxt_in_group = group_functions::get_first_in_group_of_last_in_group(elem); - } - else{ - nxt_in_group = node_traits::get_next(elem); - } - prev = group_traits::get_next(elem); - } - return prev; - } - - static void insert_in_group(const node_ptr&, const node_ptr&, false_) - {} -}; - -template<class BucketType, class SplitTraits> -class incremental_rehash_rollback -{ - private: - typedef BucketType bucket_type; - typedef SplitTraits split_traits; - - incremental_rehash_rollback(); - incremental_rehash_rollback & operator=(const incremental_rehash_rollback &); - incremental_rehash_rollback (const incremental_rehash_rollback &); - - public: - incremental_rehash_rollback - (bucket_type &source_bucket, bucket_type &destiny_bucket, split_traits &split_traits) - : source_bucket_(source_bucket), destiny_bucket_(destiny_bucket) - , split_traits_(split_traits), released_(false) - {} - - void release() - { released_ = true; } - - ~incremental_rehash_rollback() - { - if(!released_){ - //If an exception is thrown, just put all moved nodes back in the old bucket - //and move back the split mark. - destiny_bucket_.splice_after(destiny_bucket_.before_begin(), source_bucket_); - split_traits_.decrement(); - } - } - - private: - bucket_type &source_bucket_; - bucket_type &destiny_bucket_; - split_traits &split_traits_; - bool released_; -}; - -template<class NodeTraits> -struct node_functions -{ - static void store_hash(typename NodeTraits::node_ptr p, std::size_t h, true_) - { return NodeTraits::set_hash(p, h); } - - static void store_hash(typename NodeTraits::node_ptr, std::size_t, false_) - {} -}; - -inline std::size_t hash_to_bucket(std::size_t hash_value, std::size_t bucket_cnt, detail::false_) -{ return hash_value % bucket_cnt; } - -inline std::size_t hash_to_bucket(std::size_t hash_value, std::size_t bucket_cnt, detail::true_) -{ return hash_value & (bucket_cnt - 1); } - -template<bool Power2Buckets, bool Incremental> -inline std::size_t hash_to_bucket_split(std::size_t hash_value, std::size_t bucket_cnt, std::size_t split) -{ - std::size_t bucket_number = detail::hash_to_bucket(hash_value, bucket_cnt, detail::bool_<Power2Buckets>()); - if(Incremental) - if(bucket_number >= split) - bucket_number -= bucket_cnt/2; - return bucket_number; -} - -} //namespace detail { - -//!This metafunction will obtain the type of a bucket -//!from the value_traits or hook option to be used with -//!a hash container. -template<class ValueTraitsOrHookOption> -struct unordered_bucket - : public detail::unordered_bucket_impl - <typename ValueTraitsOrHookOption:: - template pack<none>::proto_value_traits - > -{}; - -//!This metafunction will obtain the type of a bucket pointer -//!from the value_traits or hook option to be used with -//!a hash container. -template<class ValueTraitsOrHookOption> -struct unordered_bucket_ptr - : public detail::unordered_bucket_ptr_impl - <typename ValueTraitsOrHookOption:: - template pack<none>::proto_value_traits - > -{}; - -//!This metafunction will obtain the type of the default bucket traits -//!(when the user does not specify the bucket_traits<> option) from the -//!value_traits or hook option to be used with -//!a hash container. -template<class ValueTraitsOrHookOption> -struct unordered_default_bucket_traits -{ - typedef typename ValueTraitsOrHookOption:: - template pack<none>::proto_value_traits supposed_value_traits; - typedef typename detail:: - get_slist_impl_from_supposed_value_traits - <supposed_value_traits>::type slist_impl; - typedef detail::bucket_traits_impl - <slist_impl> implementation_defined; - typedef implementation_defined type; -}; - -struct default_bucket_traits; - -struct hashtable_defaults -{ - typedef detail::default_hashtable_hook proto_value_traits; - typedef std::size_t size_type; - typedef void equal; - typedef void hash; - typedef default_bucket_traits bucket_traits; - static const bool constant_time_size = true; - static const bool power_2_buckets = false; - static const bool cache_begin = false; - static const bool compare_hash = false; - static const bool incremental = false; -}; - -template<class ValueTraits, bool IsConst> -struct downcast_node_to_value_t - : public detail::node_to_value<ValueTraits, IsConst> -{ - typedef detail::node_to_value<ValueTraits, IsConst> base_t; - typedef typename base_t::result_type result_type; - typedef ValueTraits value_traits; - typedef typename detail::get_slist_impl - <typename detail::reduced_slist_node_traits - <typename value_traits::node_traits>::type - >::type slist_impl; - typedef typename detail::add_const_if_c - <typename slist_impl::node, IsConst>::type & first_argument_type; - typedef typename detail::add_const_if_c - < typename ValueTraits::node_traits::node - , IsConst>::type & intermediate_argument_type; - typedef typename pointer_traits - <typename ValueTraits::pointer>:: - template rebind_pointer - <const ValueTraits>::type const_value_traits_ptr; - - downcast_node_to_value_t(const const_value_traits_ptr &ptr) - : base_t(ptr) - {} - - result_type operator()(first_argument_type arg) const - { return this->base_t::operator()(static_cast<intermediate_argument_type>(arg)); } -}; - -template<class F, class SlistNodePtr, class NodePtr> -struct node_cast_adaptor - : private detail::ebo_functor_holder<F> -{ - typedef detail::ebo_functor_holder<F> base_t; - - typedef typename pointer_traits<SlistNodePtr>::element_type slist_node; - typedef typename pointer_traits<NodePtr>::element_type node; - - template<class ConvertibleToF, class RealValuTraits> - node_cast_adaptor(const ConvertibleToF &c2f, const RealValuTraits *traits) - : base_t(base_t(c2f, traits)) - {} - - typename base_t::node_ptr operator()(const slist_node &to_clone) - { return base_t::operator()(static_cast<const node &>(to_clone)); } - - void operator()(SlistNodePtr to_clone) - { - base_t::operator()(pointer_traits<NodePtr>::pointer_to(static_cast<node &>(*to_clone))); - } -}; - -static const std::size_t hashtable_data_bool_flags_mask = - ( hash_bool_flags::cache_begin_pos - | hash_bool_flags::constant_time_size_pos - | hash_bool_flags::incremental_pos - ); - -//bucket_plus_vtraits stores ValueTraits + BucketTraits -//this data is needed by iterators to obtain the -//value from the iterator and detect the bucket -template<class ValueTraits, class BucketTraits> -struct bucket_plus_vtraits : public ValueTraits -{ - typedef BucketTraits bucket_traits; - typedef ValueTraits value_traits; - - static const bool safemode_or_autounlink = is_safe_autounlink<value_traits::link_mode>::value; - - typedef typename - detail::get_slist_impl_from_supposed_value_traits - <value_traits>::type slist_impl; - typedef typename value_traits::node_traits node_traits; - typedef unordered_group_adapter<node_traits> group_traits; - typedef typename slist_impl::iterator siterator; - typedef typename slist_impl::size_type size_type; - typedef detail::bucket_impl<slist_impl> bucket_type; - typedef detail::group_functions<node_traits> group_functions_t; - typedef typename slist_impl::node_algorithms node_algorithms; - typedef typename slist_impl::node_ptr slist_node_ptr; - typedef typename node_traits::node_ptr node_ptr; - typedef typename node_traits::node node; - typedef typename value_traits::value_type value_type; - typedef circular_slist_algorithms<group_traits> group_algorithms; - typedef typename pointer_traits - <typename value_traits::pointer>:: - template rebind_pointer - <const value_traits>::type const_value_traits_ptr; - typedef typename pointer_traits - <typename value_traits::pointer>:: - template rebind_pointer - <const bucket_plus_vtraits>::type const_bucket_value_traits_ptr; - typedef typename detail::unordered_bucket_ptr_impl - <value_traits>::type bucket_ptr; - typedef detail::bool_<detail::optimize_multikey_is_true - <node_traits>::value> optimize_multikey_t; - - template<class BucketTraitsType> - bucket_plus_vtraits(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits) - : ValueTraits(val_traits), bucket_traits_(::boost::forward<BucketTraitsType>(b_traits)) - {} - - bucket_plus_vtraits & operator =(const bucket_plus_vtraits &x) - { bucket_traits_ = x.bucket_traits_; return *this; } - - const_value_traits_ptr priv_value_traits_ptr() const - { return pointer_traits<const_value_traits_ptr>::pointer_to(this->priv_value_traits()); } - - //bucket_value_traits - // - const bucket_plus_vtraits &get_bucket_value_traits() const - { return *this; } - - bucket_plus_vtraits &get_bucket_value_traits() - { return *this; } - - const_bucket_value_traits_ptr bucket_value_traits_ptr() const - { return pointer_traits<const_bucket_value_traits_ptr>::pointer_to(this->get_bucket_value_traits()); } - - //value traits - // - const value_traits &priv_value_traits() const - { return *this; } - - value_traits &priv_value_traits() - { return *this; } - - //bucket_traits - // - const bucket_traits &priv_bucket_traits() const - { return this->bucket_traits_; } - - bucket_traits &priv_bucket_traits() - { return this->bucket_traits_; } - - //bucket operations - bucket_ptr priv_bucket_pointer() const - { return this->priv_bucket_traits().bucket_begin(); } - - typename slist_impl::size_type priv_bucket_count() const - { return this->priv_bucket_traits().bucket_count(); } - - bucket_ptr priv_invalid_bucket() const - { - const bucket_traits &rbt = this->priv_bucket_traits(); - return rbt.bucket_begin() + rbt.bucket_count(); - } - siterator priv_invalid_local_it() const - { return this->priv_bucket_traits().bucket_begin()->before_begin(); } - - static siterator priv_get_last(bucket_type &b, detail::true_) //optimize multikey - { - //First find the last node of p's group. - //This requires checking the first node of the next group or - //the bucket node. - slist_node_ptr end_ptr(b.end().pointed_node()); - node_ptr possible_end(node_traits::get_next( detail::dcast_bucket_ptr<node>(end_ptr))); - node_ptr last_node_group(possible_end); - - while(end_ptr != possible_end){ - last_node_group = group_traits::get_next(detail::dcast_bucket_ptr<node>(possible_end)); - possible_end = node_traits::get_next(last_node_group); - } - return bucket_type::s_iterator_to(*last_node_group); - } - - static siterator priv_get_last(bucket_type &b, detail::false_) //NOT optimize multikey - { return b.previous(b.end()); } - - static siterator priv_get_previous(bucket_type &b, siterator i, detail::true_) //optimize multikey - { - node_ptr elem(detail::dcast_bucket_ptr<node>(i.pointed_node())); - node_ptr prev_in_group(group_traits::get_next(elem)); - bool first_in_group = node_traits::get_next(prev_in_group) != elem; - typename bucket_type::node &n = first_in_group - ? *group_functions_t::get_prev_to_first_in_group(b.end().pointed_node(), elem) - : *group_traits::get_next(elem) - ; - return bucket_type::s_iterator_to(n); - } - - static siterator priv_get_previous(bucket_type &b, siterator i, detail::false_) //NOT optimize multikey - { return b.previous(i); } - - static void priv_clear_group_nodes(bucket_type &b, detail::true_) //optimize multikey - { - siterator it(b.begin()), itend(b.end()); - while(it != itend){ - node_ptr to_erase(detail::dcast_bucket_ptr<node>(it.pointed_node())); - ++it; - group_algorithms::init(to_erase); - } - } - - static void priv_clear_group_nodes(bucket_type &, detail::false_) //NOT optimize multikey - {} - - std::size_t priv_get_bucket_num_no_hash_store(siterator it, detail::true_) //optimize multikey - { - const bucket_ptr f(this->priv_bucket_pointer()), l(f + this->priv_bucket_count() - 1); - slist_node_ptr bb = group_functions_t::get_bucket_before_begin - ( f->end().pointed_node() - , l->end().pointed_node() - , detail::dcast_bucket_ptr<node>(it.pointed_node())); - //Now get the bucket_impl from the iterator - const bucket_type &b = static_cast<const bucket_type&> - (bucket_type::slist_type::container_from_end_iterator(bucket_type::s_iterator_to(*bb))); - //Now just calculate the index b has in the bucket array - return static_cast<size_type>(&b - &*f); - } - - std::size_t priv_get_bucket_num_no_hash_store(siterator it, detail::false_) //NO optimize multikey - { - bucket_ptr f(this->priv_bucket_pointer()), l(f + this->priv_bucket_count() - 1); - slist_node_ptr first_ptr(f->cend().pointed_node()) - , last_ptr(l->cend().pointed_node()); - - //The end node is embedded in the singly linked list: - //iterate until we reach it. - while(!(first_ptr <= it.pointed_node() && it.pointed_node() <= last_ptr)){ - ++it; - } - //Now get the bucket_impl from the iterator - const bucket_type &b = static_cast<const bucket_type&> - (bucket_type::container_from_end_iterator(it)); - - //Now just calculate the index b has in the bucket array - return static_cast<std::size_t>(&b - &*f); - } - - static std::size_t priv_stored_hash(slist_node_ptr n, detail::true_) //store_hash - { return node_traits::get_hash(detail::dcast_bucket_ptr<node>(n)); } - - static std::size_t priv_stored_hash(slist_node_ptr, detail::false_) //NO store_hash (This should never be called) - { BOOST_INTRUSIVE_INVARIANT_ASSERT(0); return 0; } - - node &priv_value_to_node(value_type &v) - { return *this->priv_value_traits().to_node_ptr(v); } - - const node &priv_value_to_node(const value_type &v) const - { return *this->priv_value_traits().to_node_ptr(v); } - - value_type &priv_value_from_slist_node(slist_node_ptr n) - { return *this->priv_value_traits().to_value_ptr(detail::dcast_bucket_ptr<node>(n)); } - - const value_type &priv_value_from_slist_node(slist_node_ptr n) const - { return *this->priv_value_traits().to_value_ptr(detail::dcast_bucket_ptr<node>(n)); } - - void priv_clear_buckets(const bucket_ptr buckets_ptr, const size_type bucket_cnt) - { - bucket_ptr buckets_it = buckets_ptr; - for(size_type bucket_i = 0; bucket_i != bucket_cnt; ++buckets_it, ++bucket_i){ - if(safemode_or_autounlink){ - bucket_plus_vtraits::priv_clear_group_nodes(*buckets_it, optimize_multikey_t()); - buckets_it->clear_and_dispose(detail::init_disposer<node_algorithms>()); - } - else{ - buckets_it->clear(); - } - } - } - - bucket_traits bucket_traits_; -}; - -//bucket_hash_t -//Stores bucket_plus_vtraits plust the hash function -template<class VoidOrKeyHash, class ValueTraits, class BucketTraits> -struct bucket_hash_t - : public detail::ebo_functor_holder - <typename get_hash< VoidOrKeyHash - , typename bucket_plus_vtraits<ValueTraits,BucketTraits>::value_traits::value_type - >::type - > -{ - typedef typename bucket_plus_vtraits<ValueTraits,BucketTraits>::value_traits value_traits; - typedef typename value_traits::value_type value_type; - typedef typename value_traits::node_traits node_traits; - typedef typename get_hash< VoidOrKeyHash, value_type>::type hasher; - typedef BucketTraits bucket_traits; - typedef bucket_plus_vtraits<ValueTraits, BucketTraits> bucket_plus_vtraits_t; - - template<class BucketTraitsType> - bucket_hash_t(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits, const hasher & h) - : detail::ebo_functor_holder<hasher>(h), internal(val_traits, ::boost::forward<BucketTraitsType>(b_traits)) - {} - - const hasher &priv_hasher() const - { return this->detail::ebo_functor_holder<hasher>::get(); } - - hasher &priv_hasher() - { return this->detail::ebo_functor_holder<hasher>::get(); } - - std::size_t priv_stored_or_compute_hash(const value_type &v, detail::true_) const //For store_hash == true - { return node_traits::get_hash(this->internal.priv_value_traits().to_node_ptr(v)); } - - std::size_t priv_stored_or_compute_hash(const value_type &v, detail::false_) const //For store_hash == false - { return this->priv_hasher()(v); } - - bucket_plus_vtraits_t internal; //4 -}; - -//bucket_hash_equal_t -//Stores bucket_hash_t and the equality function when the first -//non-empty bucket shall not be cached. -template<class VoidOrKeyHash, class VoidOrKeyEqual, class ValueTraits, class BucketTraits, bool> -struct bucket_hash_equal_t - : public detail::ebo_functor_holder //equal - <typename get_equal_to< VoidOrKeyEqual - , typename bucket_plus_vtraits<ValueTraits,BucketTraits>::value_traits::value_type - >::type - > -{ - typedef bucket_hash_t<VoidOrKeyHash, ValueTraits, BucketTraits> bucket_hash_type; - typedef bucket_plus_vtraits<ValueTraits,BucketTraits> bucket_plus_vtraits_t; - typedef typename bucket_plus_vtraits_t::value_traits value_traits; - typedef typename get_equal_to< VoidOrKeyEqual - , typename value_traits::value_type - >::type value_equal; - typedef typename bucket_hash_type::hasher hasher; - typedef BucketTraits bucket_traits; - typedef typename bucket_plus_vtraits_t::slist_impl slist_impl; - typedef typename slist_impl::size_type size_type; - typedef typename slist_impl::iterator siterator; - typedef detail::bucket_impl<slist_impl> bucket_type; - typedef typename detail::unordered_bucket_ptr_impl<value_traits>::type bucket_ptr; - - template<class BucketTraitsType> - bucket_hash_equal_t(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits, const hasher & h, const value_equal &e) - : detail::ebo_functor_holder<value_equal>(e) - , internal(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h) - {} - - bucket_ptr priv_get_cache() - { return this->internal.internal.priv_bucket_pointer(); } - - void priv_set_cache(const bucket_ptr &) - {} - - size_type priv_get_cache_bucket_num() - { return 0u; } - - void priv_initialize_cache() - {} - - void priv_swap_cache(bucket_hash_equal_t &) - {} - - siterator priv_begin() const - { - size_type n = 0; - size_type bucket_cnt = this->internal.internal.priv_bucket_count(); - for (n = 0; n < bucket_cnt; ++n){ - bucket_type &b = this->internal.internal.priv_bucket_pointer()[n]; - if(!b.empty()){ - return b.begin(); - } - } - return this->internal.internal.priv_invalid_local_it(); - } - - void priv_insertion_update_cache(size_type) - {} - - void priv_erasure_update_cache_range(size_type, size_type) - {} - - void priv_erasure_update_cache() - {} - - const value_equal &priv_equal() const - { return this->detail::ebo_functor_holder<value_equal>::get(); } - - value_equal &priv_equal() - { return this->detail::ebo_functor_holder<value_equal>::get(); } - - bucket_hash_t<VoidOrKeyHash, ValueTraits, BucketTraits> internal; //3 -}; - -//bucket_hash_equal_t -//Stores bucket_hash_t and the equality function when the first -//non-empty bucket shall be cached. -template<class VoidOrKeyHash, class VoidOrKeyEqual, class ValueTraits, class BucketTraits> //cache_begin == true version -struct bucket_hash_equal_t<VoidOrKeyHash, VoidOrKeyEqual, ValueTraits, BucketTraits, true> - : public detail::ebo_functor_holder //equal - <typename get_equal_to< VoidOrKeyEqual - , typename bucket_plus_vtraits<ValueTraits,BucketTraits>::value_traits::value_type - >::type - > -{ - typedef bucket_plus_vtraits<ValueTraits, BucketTraits> bucket_plus_vtraits_t; - typedef bucket_hash_t<VoidOrKeyHash, ValueTraits, BucketTraits> bucket_hash_type; - typedef typename bucket_plus_vtraits - <ValueTraits,BucketTraits>::value_traits value_traits; - typedef typename get_equal_to - < VoidOrKeyEqual - , typename value_traits::value_type>::type value_equal; - typedef typename bucket_hash_type::hasher hasher; - typedef BucketTraits bucket_traits; - typedef typename bucket_plus_vtraits_t::slist_impl::size_type size_type; - typedef typename bucket_plus_vtraits_t::slist_impl::iterator siterator; - - template<class BucketTraitsType> - bucket_hash_equal_t(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits, const hasher & h, const value_equal &e) - : detail::ebo_functor_holder<value_equal>(e) - , internal(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h) - {} - - typedef typename detail::unordered_bucket_ptr_impl - <typename bucket_hash_type::value_traits>::type bucket_ptr; - - bucket_ptr &priv_get_cache() - { return cached_begin_; } - - const bucket_ptr &priv_get_cache() const - { return cached_begin_; } - - void priv_set_cache(const bucket_ptr &p) - { cached_begin_ = p; } - - std::size_t priv_get_cache_bucket_num() - { return this->cached_begin_ - this->internal.internal.priv_bucket_pointer(); } - - void priv_initialize_cache() - { this->cached_begin_ = this->internal.internal.priv_invalid_bucket(); } - - void priv_swap_cache(bucket_hash_equal_t &other) - { - std::swap(this->cached_begin_, other.cached_begin_); - } - - siterator priv_begin() const - { - if(this->cached_begin_ == this->internal.internal.priv_invalid_bucket()){ - return this->internal.internal.priv_invalid_local_it(); - } - else{ - return this->cached_begin_->begin(); - } - } - - void priv_insertion_update_cache(size_type insertion_bucket) - { - bucket_ptr p = this->internal.internal.priv_bucket_pointer() + insertion_bucket; - if(p < this->cached_begin_){ - this->cached_begin_ = p; - } - } - - const value_equal &priv_equal() const - { return this->detail::ebo_functor_holder<value_equal>::get(); } - - value_equal &priv_equal() - { return this->detail::ebo_functor_holder<value_equal>::get(); } - - void priv_erasure_update_cache_range(size_type first_bucket_num, size_type last_bucket_num) - { - //If the last bucket is the end, the cache must be updated - //to the last position if all - if(this->priv_get_cache_bucket_num() == first_bucket_num && - this->internal.internal.priv_bucket_pointer()[first_bucket_num].empty() ){ - this->priv_set_cache(this->internal.internal.priv_bucket_pointer() + last_bucket_num); - this->priv_erasure_update_cache(); - } - } - - void priv_erasure_update_cache() - { - if(this->cached_begin_ != this->internal.internal.priv_invalid_bucket()){ - size_type current_n = this->priv_get_cache() - this->internal.internal.priv_bucket_pointer(); - for( const size_type num_buckets = this->internal.internal.priv_bucket_count() - ; current_n < num_buckets - ; ++current_n, ++this->priv_get_cache()){ - if(!this->priv_get_cache()->empty()){ - return; - } - } - this->priv_initialize_cache(); - } - } - - bucket_ptr cached_begin_; - bucket_hash_t<VoidOrKeyHash, ValueTraits, BucketTraits> internal; //2 -}; - -//hashdata_internal -//Stores bucket_hash_equal_t and split_traits -template<class SizeType, std::size_t BoolFlags, class VoidOrKeyHash, class VoidOrKeyEqual, class ValueTraits, class BucketTraits> -struct hashdata_internal - : public detail::size_holder< 0 != (BoolFlags & hash_bool_flags::incremental_pos), SizeType, int> //split_traits -{ - typedef bucket_hash_equal_t - < VoidOrKeyHash, VoidOrKeyEqual - , ValueTraits, BucketTraits - , 0 != (BoolFlags & hash_bool_flags::cache_begin_pos) - > internal_type; - typedef typename internal_type::value_equal value_equal; - typedef typename internal_type::hasher hasher; - typedef bucket_plus_vtraits<ValueTraits,BucketTraits> bucket_plus_vtraits_t; - typedef typename bucket_plus_vtraits_t::size_type size_type; - typedef typename bucket_plus_vtraits_t::bucket_ptr bucket_ptr; - typedef detail::size_holder - <0 != (BoolFlags & hash_bool_flags::incremental_pos) - , SizeType, int> split_traits; - typedef typename bucket_plus_vtraits_t:: - value_traits::node_traits node_traits; - typedef detail::bool_<detail::optimize_multikey_is_true - <node_traits>::value> optimize_multikey_t; - - template<class BucketTraitsType> - hashdata_internal( const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits - , const hasher & h, const value_equal &e) - : internal(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h, e) - {} - - split_traits &priv_split_traits() - { return *this; } - - const split_traits &priv_split_traits() const - { return *this; } - - ~hashdata_internal() - { this->priv_clear_buckets(); } - - void priv_clear_buckets() - { - this->internal.internal.internal.priv_clear_buckets - ( this->internal.priv_get_cache() - , this->internal.internal.internal.priv_bucket_count() - - (this->internal.priv_get_cache() - - this->internal.internal.internal.priv_bucket_pointer())); - } - - void priv_clear_buckets_and_cache() - { - this->priv_clear_buckets(); - this->internal.priv_initialize_cache(); - } - - void priv_initialize_buckets_and_cache() - { - this->internal.internal.internal.priv_clear_buckets - ( this->internal.internal.internal.priv_bucket_pointer() - , this->internal.internal.internal.priv_bucket_count()); - this->internal.priv_initialize_cache(); - } - - internal_type internal; //2 -}; - -//hashtable_data_t -//Stores hashdata_internal and size_traits -template<class SizeType, std::size_t BoolFlags, class VoidOrKeyHash, class VoidOrKeyEqual, class ValueTraits, class BucketTraits> -struct hashtable_data_t - : public detail::size_holder - < 0 != (BoolFlags & hash_bool_flags::constant_time_size_pos), SizeType> //size_traits -{ - typedef detail::size_holder - < 0 != (BoolFlags & hash_bool_flags::constant_time_size_pos) - , SizeType> size_traits; - typedef hashdata_internal - < SizeType - , BoolFlags & (hash_bool_flags::incremental_pos | hash_bool_flags::cache_begin_pos) - , VoidOrKeyHash, VoidOrKeyEqual - , ValueTraits, BucketTraits> internal_type; - typedef ValueTraits value_traits; - typedef typename internal_type::value_equal value_equal; - typedef typename internal_type::hasher hasher; - typedef BucketTraits bucket_traits; - typedef bucket_plus_vtraits - <ValueTraits,BucketTraits> bucket_plus_vtraits_t; - - template<class BucketTraitsType> - hashtable_data_t( BOOST_FWD_REF(BucketTraitsType) b_traits, const hasher & h - , const value_equal &e, const value_traits &val_traits) - : internal(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h, e) - {} - - internal_type internal; //1 -}; - -/// @endcond - -//! The class template hashtable is an intrusive hash table container, that -//! is used to construct intrusive unordered_set and unordered_multiset containers. The -//! no-throw guarantee holds only, if the VoidOrKeyEqual object and Hasher don't throw. -//! -//! hashtable is a semi-intrusive container: each object to be stored in the -//! container must contain a proper hook, but the container also needs -//! additional auxiliary memory to work: hashtable needs a pointer to an array -//! of type `bucket_type` to be passed in the constructor. This bucket array must -//! have at least the same lifetime as the container. This makes the use of -//! hashtable more complicated than purely intrusive containers. -//! `bucket_type` is default-constructible, copyable and assignable -//! -//! The template parameter \c T is the type to be managed by the container. -//! The user can specify additional options and if no options are provided -//! default options are used. -//! -//! The container supports the following options: -//! \c base_hook<>/member_hook<>/value_traits<>, -//! \c constant_time_size<>, \c size_type<>, \c hash<> and \c equal<> -//! \c bucket_traits<>, power_2_buckets<>, cache_begin<> and incremental<>. -//! -//! hashtable only provides forward iterators but it provides 4 iterator types: -//! iterator and const_iterator to navigate through the whole container and -//! local_iterator and const_local_iterator to navigate through the values -//! stored in a single bucket. Local iterators are faster and smaller. -//! -//! It's not recommended to use non constant-time size hashtables because several -//! key functions, like "empty()", become non-constant time functions. Non -//! constant_time size hashtables are mainly provided to support auto-unlink hooks. -//! -//! hashtables, does not make automatic rehashings nor -//! offers functions related to a load factor. Rehashing can be explicitly requested -//! and the user must provide a new bucket array that will be used from that moment. -//! -//! Since no automatic rehashing is done, iterators are never invalidated when -//! inserting or erasing elements. Iterators are only invalidated when rehashing. -#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED) -template<class T, class ...Options> -#else -template<class ValueTraits, class VoidOrKeyHash, class VoidOrKeyEqual, class SizeType, class BucketTraits, std::size_t BoolFlags> -#endif -class hashtable_impl - : private hashtable_data_t - < SizeType - , BoolFlags & hashtable_data_bool_flags_mask - , VoidOrKeyHash, VoidOrKeyEqual, ValueTraits, BucketTraits> -{ - typedef hashtable_data_t - < SizeType - , BoolFlags & hashtable_data_bool_flags_mask - , VoidOrKeyHash, VoidOrKeyEqual, ValueTraits, BucketTraits> data_type; - - public: - typedef ValueTraits value_traits; - - /// @cond - typedef BucketTraits bucket_traits; - - typedef typename detail::get_slist_impl - <typename detail::reduced_slist_node_traits - <typename value_traits::node_traits>::type - >::type slist_impl; - typedef bucket_plus_vtraits<ValueTraits, BucketTraits> bucket_plus_vtraits_t; - typedef typename bucket_plus_vtraits_t::const_value_traits_ptr const_value_traits_ptr; - - - /// @endcond - - typedef typename value_traits::pointer pointer; - typedef typename value_traits::const_pointer const_pointer; - typedef typename value_traits::value_type value_type; - typedef typename pointer_traits<pointer>::reference reference; - typedef typename pointer_traits<const_pointer>::reference const_reference; - typedef typename pointer_traits<pointer>::difference_type difference_type; - typedef SizeType size_type; - typedef value_type key_type; - typedef typename data_type::value_equal key_equal; - typedef typename data_type::value_equal value_equal; - typedef typename data_type::hasher hasher; - typedef detail::bucket_impl<slist_impl> bucket_type; - typedef typename pointer_traits - <pointer>::template rebind_pointer - < bucket_type >::type bucket_ptr; - typedef typename pointer_traits - <pointer>::template rebind_pointer - < const bucket_type >::type const_bucket_ptr; - typedef typename pointer_traits - <bucket_ptr>::reference bucket_reference; - typedef typename pointer_traits - <bucket_ptr>::reference const_bucket_reference; - typedef typename slist_impl::iterator siterator; - typedef typename slist_impl::const_iterator const_siterator; - typedef hashtable_iterator<bucket_plus_vtraits_t, false> iterator; - typedef hashtable_iterator<bucket_plus_vtraits_t, true> const_iterator; - typedef typename value_traits::node_traits node_traits; - typedef typename node_traits::node node; - typedef typename pointer_traits - <pointer>::template rebind_pointer - < node >::type node_ptr; - typedef typename pointer_traits - <pointer>::template rebind_pointer - < const node >::type const_node_ptr; - typedef typename pointer_traits - <node_ptr>::reference node_reference; - typedef typename pointer_traits - <const_node_ptr>::reference const_node_reference; - typedef typename slist_impl::node_algorithms node_algorithms; - - static const bool stateful_value_traits = detail::is_stateful_value_traits<value_traits>::value; - static const bool store_hash = detail::store_hash_is_true<node_traits>::value; - - static const bool unique_keys = 0 != (BoolFlags & hash_bool_flags::unique_keys_pos); - static const bool constant_time_size = 0 != (BoolFlags & hash_bool_flags::constant_time_size_pos); - static const bool cache_begin = 0 != (BoolFlags & hash_bool_flags::cache_begin_pos); - static const bool compare_hash = 0 != (BoolFlags & hash_bool_flags::compare_hash_pos); - static const bool incremental = 0 != (BoolFlags & hash_bool_flags::incremental_pos); - static const bool power_2_buckets = incremental || (0 != (BoolFlags & hash_bool_flags::power_2_buckets_pos)); - - static const bool optimize_multikey - = detail::optimize_multikey_is_true<node_traits>::value && !unique_keys; - - /// @cond - private: - - //Configuration error: compare_hash<> can't be specified without store_hash<> - //See documentation for more explanations - BOOST_STATIC_ASSERT((!compare_hash || store_hash)); - - typedef typename slist_impl::node_ptr slist_node_ptr; - typedef typename pointer_traits - <slist_node_ptr>::template rebind_pointer - < void >::type void_pointer; - //We'll define group traits, but these won't be instantiated if - //optimize_multikey is not true - typedef unordered_group_adapter<node_traits> group_traits; - typedef circular_slist_algorithms<group_traits> group_algorithms; - typedef detail::bool_<store_hash> store_hash_t; - typedef detail::bool_<optimize_multikey> optimize_multikey_t; - typedef detail::bool_<cache_begin> cache_begin_t; - typedef detail::bool_<power_2_buckets> power_2_buckets_t; - typedef detail::size_holder<constant_time_size, size_type> size_traits; - typedef detail::size_holder<incremental, size_type, int> split_traits; - typedef detail::group_functions<node_traits> group_functions_t; - typedef detail::node_functions<node_traits> node_functions_t; - - private: - //noncopyable, movable - BOOST_MOVABLE_BUT_NOT_COPYABLE(hashtable_impl) - - static const bool safemode_or_autounlink = is_safe_autounlink<value_traits::link_mode>::value; - - //Constant-time size is incompatible with auto-unlink hooks! - BOOST_STATIC_ASSERT(!(constant_time_size && ((int)value_traits::link_mode == (int)auto_unlink))); - //Cache begin is incompatible with auto-unlink hooks! - BOOST_STATIC_ASSERT(!(cache_begin && ((int)value_traits::link_mode == (int)auto_unlink))); - - template<class Disposer> - node_cast_adaptor< detail::node_disposer<Disposer, value_traits, CircularSListAlgorithms> - , slist_node_ptr, node_ptr > - make_node_disposer(const Disposer &disposer) const - { - return node_cast_adaptor - < detail::node_disposer<Disposer, value_traits, CircularSListAlgorithms> - , slist_node_ptr, node_ptr > - (disposer, &this->priv_value_traits()); - } - - /// @endcond - - public: - typedef detail::insert_commit_data_impl insert_commit_data; - - typedef detail::transform_iterator - < typename slist_impl::iterator - , downcast_node_to_value_t - < value_traits - , false> > local_iterator; - - typedef detail::transform_iterator - < typename slist_impl::iterator - , downcast_node_to_value_t - < value_traits - , true> > const_local_iterator; - - public: - - //! <b>Requires</b>: buckets must not be being used by any other resource. - //! - //! <b>Effects</b>: Constructs an empty unordered_set, storing a reference - //! to the bucket array and copies of the key_hasher and equal_func functors. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If value_traits::node_traits::node - //! constructor throws (this does not happen with predefined Boost.Intrusive hooks) - //! or the copy constructor or invocation of hash_func or equal_func throws. - //! - //! <b>Notes</b>: buckets array must be disposed only after - //! *this is disposed. - explicit hashtable_impl ( const bucket_traits &b_traits - , const hasher & hash_func = hasher() - , const key_equal &equal_func = key_equal() - , const value_traits &v_traits = value_traits()) - : data_type(b_traits, hash_func, equal_func, v_traits) - { - this->data_type::internal.priv_initialize_buckets_and_cache(); - this->priv_size_traits().set_size(size_type(0)); - size_type bucket_sz = this->priv_bucket_count(); - BOOST_INTRUSIVE_INVARIANT_ASSERT(bucket_sz != 0); - //Check power of two bucket array if the option is activated - BOOST_INTRUSIVE_INVARIANT_ASSERT - (!power_2_buckets || (0 == (bucket_sz & (bucket_sz-1)))); - this->priv_split_traits().set_size(bucket_sz>>1); - } - - //! <b>Effects</b>: to-do - //! - hashtable_impl(BOOST_RV_REF(hashtable_impl) x) - : data_type( ::boost::move(x.priv_bucket_traits()) - , ::boost::move(x.priv_hasher()) - , ::boost::move(x.priv_equal()) - , ::boost::move(x.priv_value_traits()) - ) - { - this->priv_swap_cache(x); - x.priv_initialize_cache(); - if(constant_time_size){ - this->priv_size_traits().set_size(size_type(0)); - this->priv_size_traits().set_size(x.priv_size_traits().get_size()); - x.priv_size_traits().set_size(size_type(0)); - } - if(incremental){ - this->priv_split_traits().set_size(x.priv_split_traits().get_size()); - x.priv_split_traits().set_size(size_type(0)); - } - } - - //! <b>Effects</b>: to-do - //! - hashtable_impl& operator=(BOOST_RV_REF(hashtable_impl) x) - { this->swap(x); return *this; } - - #if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED) - //! <b>Effects</b>: Detaches all elements from this. The objects in the unordered_set - //! are not deleted (i.e. no destructors are called). - //! - //! <b>Complexity</b>: Linear to the number of elements in the unordered_set, if - //! it's a safe-mode or auto-unlink value. Otherwise constant. - //! - //! <b>Throws</b>: Nothing. - ~hashtable_impl(); - #endif - - //! <b>Effects</b>: Returns an iterator pointing to the beginning of the unordered_set. - //! - //! <b>Complexity</b>: Amortized constant time. - //! Worst case (empty unordered_set): O(this->bucket_count()) - //! - //! <b>Throws</b>: Nothing. - iterator begin() - { return iterator(this->priv_begin(), &this->get_bucket_value_traits()); } - - //! <b>Effects</b>: Returns a const_iterator pointing to the beginning - //! of the unordered_set. - //! - //! <b>Complexity</b>: Amortized constant time. - //! Worst case (empty unordered_set): O(this->bucket_count()) - //! - //! <b>Throws</b>: Nothing. - const_iterator begin() const - { return this->cbegin(); } - - //! <b>Effects</b>: Returns a const_iterator pointing to the beginning - //! of the unordered_set. - //! - //! <b>Complexity</b>: Amortized constant time. - //! Worst case (empty unordered_set): O(this->bucket_count()) - //! - //! <b>Throws</b>: Nothing. - const_iterator cbegin() const - { return const_iterator(this->priv_begin(), &this->get_bucket_value_traits()); } - - //! <b>Effects</b>: Returns an iterator pointing to the end of the unordered_set. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - iterator end() - { return iterator(this->priv_invalid_local_it(), 0); } - - //! <b>Effects</b>: Returns a const_iterator pointing to the end of the unordered_set. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - const_iterator end() const - { return this->cend(); } - - //! <b>Effects</b>: Returns a const_iterator pointing to the end of the unordered_set. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - const_iterator cend() const - { return const_iterator(this->priv_invalid_local_it(), 0); } - - //! <b>Effects</b>: Returns the hasher object used by the unordered_set. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If hasher copy-constructor throws. - hasher hash_function() const - { return this->priv_hasher(); } - - //! <b>Effects</b>: Returns the key_equal object used by the unordered_set. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If key_equal copy-constructor throws. - key_equal key_eq() const - { return this->priv_equal(); } - - //! <b>Effects</b>: Returns true if the container is empty. - //! - //! <b>Complexity</b>: if constant-time size and cache_begin options are disabled, - //! average constant time (worst case, with empty() == true: O(this->bucket_count()). - //! Otherwise constant. - //! - //! <b>Throws</b>: Nothing. - bool empty() const - { - if(constant_time_size){ - return !this->size(); - } - else if(cache_begin){ - return this->begin() == this->end(); - } - else{ - size_type bucket_cnt = this->priv_bucket_count(); - const bucket_type *b = boost::intrusive::detail::to_raw_pointer(this->priv_bucket_pointer()); - for (size_type n = 0; n < bucket_cnt; ++n, ++b){ - if(!b->empty()){ - return false; - } - } - return true; - } - } - - //! <b>Effects</b>: Returns the number of elements stored in the unordered_set. - //! - //! <b>Complexity</b>: Linear to elements contained in *this if - //! constant_time_size is false. Constant-time otherwise. - //! - //! <b>Throws</b>: Nothing. - size_type size() const - { - if(constant_time_size) - return this->priv_size_traits().get_size(); - else{ - size_type len = 0; - size_type bucket_cnt = this->priv_bucket_count(); - const bucket_type *b = boost::intrusive::detail::to_raw_pointer(this->priv_bucket_pointer()); - for (size_type n = 0; n < bucket_cnt; ++n, ++b){ - len += b->size(); - } - return len; - } - } - - //! <b>Requires</b>: the hasher and the equality function unqualified swap - //! call should not throw. - //! - //! <b>Effects</b>: Swaps the contents of two unordered_sets. - //! Swaps also the contained bucket array and equality and hasher functors. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If the swap() call for the comparison or hash functors - //! found using ADL throw. Basic guarantee. - void swap(hashtable_impl& other) - { - using std::swap; - //These can throw - swap(this->priv_equal(), other.priv_equal()); - swap(this->priv_hasher(), other.priv_hasher()); - //These can't throw - swap(this->priv_bucket_traits(), other.priv_bucket_traits()); - swap(this->priv_value_traits(), other.priv_value_traits()); - this->priv_swap_cache(other); - if(constant_time_size){ - size_type backup = this->priv_size_traits().get_size(); - this->priv_size_traits().set_size(other.priv_size_traits().get_size()); - other.priv_size_traits().set_size(backup); - } - if(incremental){ - size_type backup = this->priv_split_traits().get_size(); - this->priv_split_traits().set_size(other.priv_split_traits().get_size()); - other.priv_split_traits().set_size(backup); - } - } - - //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw - //! Cloner should yield to nodes that compare equal and produce the same - //! hash than the original node. - //! - //! <b>Effects</b>: Erases all the elements from *this - //! calling Disposer::operator()(pointer), clones all the - //! elements from src calling Cloner::operator()(const_reference ) - //! and inserts them on *this. The hash function and the equality - //! predicate are copied from the source. - //! - //! If store_hash option is true, this method does not use the hash function. - //! - //! If any operation throws, all cloned elements are unlinked and disposed - //! calling Disposer::operator()(pointer). - //! - //! <b>Complexity</b>: Linear to erased plus inserted elements. - //! - //! <b>Throws</b>: If cloner or hasher throw or hash or equality predicate copying - //! throws. Basic guarantee. - template <class Cloner, class Disposer> - void clone_from(const hashtable_impl &src, Cloner cloner, Disposer disposer) - { - this->clear_and_dispose(disposer); - if(!constant_time_size || !src.empty()){ - const size_type src_bucket_count = src.bucket_count(); - const size_type dst_bucket_count = this->bucket_count(); - //Check power of two bucket array if the option is activated - BOOST_INTRUSIVE_INVARIANT_ASSERT - (!power_2_buckets || (0 == (src_bucket_count & (src_bucket_count-1)))); - BOOST_INTRUSIVE_INVARIANT_ASSERT - (!power_2_buckets || (0 == (dst_bucket_count & (dst_bucket_count-1)))); - - //If src bucket count is bigger or equal, structural copy is possible - if(!incremental && (src_bucket_count >= dst_bucket_count)){ - //First clone the first ones - const bucket_ptr src_buckets = src.priv_bucket_pointer(); - const bucket_ptr dst_buckets = this->priv_bucket_pointer(); - size_type constructed; - - typedef node_cast_adaptor< detail::node_disposer<Disposer, value_traits, CircularSListAlgorithms> - , slist_node_ptr, node_ptr > NodeDisposer; - typedef node_cast_adaptor< detail::node_cloner <Cloner, value_traits, CircularSListAlgorithms> - , slist_node_ptr, node_ptr > NodeCloner; - NodeDisposer node_disp(disposer, &this->priv_value_traits()); - - detail::exception_array_disposer<bucket_type, NodeDisposer, size_type> - rollback(dst_buckets[0], node_disp, constructed); - for( constructed = 0 - ; constructed < dst_bucket_count - ; ++constructed){ - dst_buckets[constructed].clone_from - ( src_buckets[constructed] - , NodeCloner(cloner, &this->priv_value_traits()), node_disp); - } - if(src_bucket_count != dst_bucket_count){ - //Now insert the remaining ones using the modulo trick - for(//"constructed" comes from the previous loop - ; constructed < src_bucket_count - ; ++constructed){ - bucket_type &dst_b = - dst_buckets[detail::hash_to_bucket_split<power_2_buckets, incremental>(constructed, dst_bucket_count, dst_bucket_count)]; - bucket_type &src_b = src_buckets[constructed]; - for( siterator b(src_b.begin()), e(src_b.end()) - ; b != e - ; ++b){ - dst_b.push_front(*(NodeCloner(cloner, &this->priv_value_traits())(*b.pointed_node()))); - } - } - } - this->priv_hasher() = src.priv_hasher(); - this->priv_equal() = src.priv_equal(); - rollback.release(); - this->priv_size_traits().set_size(src.priv_size_traits().get_size()); - this->priv_split_traits().set_size(dst_bucket_count); - this->priv_insertion_update_cache(0u); - this->priv_erasure_update_cache(); - } - else if(store_hash){ - //Unlike previous cloning algorithm, this can throw - //if cloner, hasher or comparison functor throw - const_iterator b(src.cbegin()), e(src.cend()); - detail::exception_disposer<hashtable_impl, Disposer> - rollback(*this, disposer); - for(; b != e; ++b){ - std::size_t hash_value = this->priv_stored_or_compute_hash(*b, store_hash_t());; - this->priv_insert_equal_with_hash(*cloner(*b), hash_value); - } - rollback.release(); - } - else{ - //Unlike previous cloning algorithm, this can throw - //if cloner, hasher or comparison functor throw - const_iterator b(src.cbegin()), e(src.cend()); - detail::exception_disposer<hashtable_impl, Disposer> - rollback(*this, disposer); - for(; b != e; ++b){ - this->insert_equal(*cloner(*b)); - } - rollback.release(); - } - } - } - - //! <b>Requires</b>: value must be an lvalue - //! - //! <b>Effects</b>: Inserts the value into the unordered_set. - //! - //! <b>Returns</b>: An iterator to the inserted value. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. Strong guarantee. - //! - //! <b>Note</b>: Does not affect the validity of iterators and references. - //! No copy-constructors are called. - iterator insert_equal(reference value) - { - size_type bucket_num; - std::size_t hash_value; - siterator prev; - siterator it = this->priv_find - (value, this->priv_hasher(), this->priv_equal(), bucket_num, hash_value, prev); - return this->priv_insert_equal_find(value, bucket_num, hash_value, it); - } - - //! <b>Requires</b>: Dereferencing iterator must yield an lvalue - //! of type value_type. - //! - //! <b>Effects</b>: Equivalent to this->insert_equal(t) for each element in [b, e). - //! - //! <b>Complexity</b>: Average case O(N), where N is std::distance(b, e). - //! Worst case O(N*this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. Basic guarantee. - //! - //! <b>Note</b>: Does not affect the validity of iterators and references. - //! No copy-constructors are called. - template<class Iterator> - void insert_equal(Iterator b, Iterator e) - { - for (; b != e; ++b) - this->insert_equal(*b); - } - - //! <b>Requires</b>: value must be an lvalue - //! - //! <b>Effects</b>: Tries to inserts value into the unordered_set. - //! - //! <b>Returns</b>: If the value - //! is not already present inserts it and returns a pair containing the - //! iterator to the new value and true. If there is an equivalent value - //! returns a pair containing an iterator to the already present value - //! and false. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. Strong guarantee. - //! - //! <b>Note</b>: Does not affect the validity of iterators and references. - //! No copy-constructors are called. - std::pair<iterator, bool> insert_unique(reference value) - { - insert_commit_data commit_data; - std::pair<iterator, bool> ret = this->insert_unique_check - (value, this->priv_hasher(), this->priv_equal(), commit_data); - if(!ret.second) - return ret; - return std::pair<iterator, bool> - (this->insert_unique_commit(value, commit_data), true); - } - - //! <b>Requires</b>: Dereferencing iterator must yield an lvalue - //! of type value_type. - //! - //! <b>Effects</b>: Equivalent to this->insert_unique(t) for each element in [b, e). - //! - //! <b>Complexity</b>: Average case O(N), where N is std::distance(b, e). - //! Worst case O(N*this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. Basic guarantee. - //! - //! <b>Note</b>: Does not affect the validity of iterators and references. - //! No copy-constructors are called. - template<class Iterator> - void insert_unique(Iterator b, Iterator e) - { - for (; b != e; ++b) - this->insert_unique(*b); - } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Checks if a value can be inserted in the unordered_set, using - //! a user provided key instead of the value itself. - //! - //! <b>Returns</b>: If there is an equivalent value - //! returns a pair containing an iterator to the already present value - //! and false. If the value can be inserted returns true in the returned - //! pair boolean and fills "commit_data" that is meant to be used with - //! the "insert_commit" function. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or equal_func throw. Strong guarantee. - //! - //! <b>Notes</b>: This function is used to improve performance when constructing - //! a value_type is expensive: if there is an equivalent value - //! the constructed object must be discarded. Many times, the part of the - //! node that is used to impose the hash or the equality is much cheaper to - //! construct than the value_type and this function offers the possibility to - //! use that the part to check if the insertion will be successful. - //! - //! If the check is successful, the user can construct the value_type and use - //! "insert_commit" to insert the object in constant-time. - //! - //! "commit_data" remains valid for a subsequent "insert_commit" only if no more - //! objects are inserted or erased from the unordered_set. - //! - //! After a successful rehashing insert_commit_data remains valid. - template<class KeyType, class KeyHasher, class KeyValueEqual> - std::pair<iterator, bool> insert_unique_check - ( const KeyType &key - , KeyHasher hash_func - , KeyValueEqual equal_func - , insert_commit_data &commit_data) - { - size_type bucket_num; - siterator prev; - siterator prev_pos = - this->priv_find(key, hash_func, equal_func, bucket_num, commit_data.hash, prev); - bool success = prev_pos == this->priv_invalid_local_it(); - if(success){ - prev_pos = prev; - } - return std::pair<iterator, bool>(iterator(prev_pos, &this->get_bucket_value_traits()),success); - } - - //! <b>Requires</b>: value must be an lvalue of type value_type. commit_data - //! must have been obtained from a previous call to "insert_check". - //! No objects should have been inserted or erased from the unordered_set between - //! the "insert_check" that filled "commit_data" and the call to "insert_commit". - //! - //! <b>Effects</b>: Inserts the value in the unordered_set using the information obtained - //! from the "commit_data" that a previous "insert_check" filled. - //! - //! <b>Returns</b>: An iterator to the newly inserted object. - //! - //! <b>Complexity</b>: Constant time. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Notes</b>: This function has only sense if a "insert_check" has been - //! previously executed to fill "commit_data". No value should be inserted or - //! erased between the "insert_check" and "insert_commit" calls. - //! - //! After a successful rehashing insert_commit_data remains valid. - iterator insert_unique_commit(reference value, const insert_commit_data &commit_data) - { - size_type bucket_num = this->priv_hash_to_bucket(commit_data.hash); - bucket_type &b = this->priv_bucket_pointer()[bucket_num]; - this->priv_size_traits().increment(); - node_ptr n = pointer_traits<node_ptr>::pointer_to(this->priv_value_to_node(value)); - node_functions_t::store_hash(n, commit_data.hash, store_hash_t()); - if(safemode_or_autounlink) - BOOST_INTRUSIVE_SAFE_HOOK_DEFAULT_ASSERT(node_algorithms::unique(n)); - this->priv_insertion_update_cache(bucket_num); - group_functions_t::insert_in_group(node_ptr(), n, optimize_multikey_t()); - return iterator(b.insert_after(b.before_begin(), *n), &this->get_bucket_value_traits()); - } - - //! <b>Effects</b>: Erases the element pointed to by i. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased element. No destructors are called. - void erase(const_iterator i) - { this->erase_and_dispose(i, detail::null_disposer()); } - - //! <b>Effects</b>: Erases the range pointed to by b end e. - //! - //! <b>Complexity</b>: Average case O(std::distance(b, e)), - //! worst case O(this->size()). - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased elements. No destructors are called. - void erase(const_iterator b, const_iterator e) - { this->erase_and_dispose(b, e, detail::null_disposer()); } - - //! <b>Effects</b>: Erases all the elements with the given value. - //! - //! <b>Returns</b>: The number of erased elements. - //! - //! <b>Complexity</b>: Average case O(this->count(value)). - //! Worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - //! Basic guarantee. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased elements. No destructors are called. - size_type erase(const_reference value) - { return this->erase(value, this->priv_hasher(), this->priv_equal()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Erases all the elements that have the same hash and - //! compare equal with the given key. - //! - //! <b>Returns</b>: The number of erased elements. - //! - //! <b>Complexity</b>: Average case O(this->count(value)). - //! Worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or equal_func throw. Basic guarantee. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased elements. No destructors are called. - template<class KeyType, class KeyHasher, class KeyValueEqual> - size_type erase(const KeyType& key, KeyHasher hash_func, KeyValueEqual equal_func) - { return this->erase_and_dispose(key, hash_func, equal_func, detail::null_disposer()); } - - //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw. - //! - //! <b>Effects</b>: Erases the element pointed to by i. - //! Disposer::operator()(pointer) is called for the removed element. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: Invalidates the iterators - //! to the erased elements. - template<class Disposer> - void erase_and_dispose(const_iterator i, Disposer disposer - /// @cond - , typename detail::enable_if_c<!detail::is_convertible<Disposer, const_iterator>::value >::type * = 0 - /// @endcond - ) - { - this->priv_erase(i, disposer, optimize_multikey_t()); - this->priv_size_traits().decrement(); - this->priv_erasure_update_cache(); - } - - //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw. - //! - //! <b>Effects</b>: Erases the range pointed to by b end e. - //! Disposer::operator()(pointer) is called for the removed elements. - //! - //! <b>Complexity</b>: Average case O(std::distance(b, e)), - //! worst case O(this->size()). - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: Invalidates the iterators - //! to the erased elements. - template<class Disposer> - void erase_and_dispose(const_iterator b, const_iterator e, Disposer disposer) - { - if(b != e){ - //Get the bucket number and local iterator for both iterators - siterator first_local_it(b.slist_it()); - size_type first_bucket_num = this->priv_get_bucket_num(first_local_it); - - const bucket_ptr buck_ptr = this->priv_bucket_pointer(); - siterator before_first_local_it - = this->priv_get_previous(buck_ptr[first_bucket_num], first_local_it); - size_type last_bucket_num; - siterator last_local_it; - - //For the end iterator, we will assign the end iterator - //of the last bucket - if(e == this->end()){ - last_bucket_num = this->bucket_count() - 1; - last_local_it = buck_ptr[last_bucket_num].end(); - } - else{ - last_local_it = e.slist_it(); - last_bucket_num = this->priv_get_bucket_num(last_local_it); - } - this->priv_erase_range(before_first_local_it, first_bucket_num, last_local_it, last_bucket_num, disposer); - this->priv_erasure_update_cache_range(first_bucket_num, last_bucket_num); - } - } - - //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw. - //! - //! <b>Effects</b>: Erases all the elements with the given value. - //! Disposer::operator()(pointer) is called for the removed elements. - //! - //! <b>Returns</b>: The number of erased elements. - //! - //! <b>Complexity</b>: Average case O(this->count(value)). - //! Worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - //! Basic guarantee. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased elements. No destructors are called. - template<class Disposer> - size_type erase_and_dispose(const_reference value, Disposer disposer) - { return this->erase_and_dispose(value, this->priv_hasher(), this->priv_equal(), disposer); } - - //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw. - //! - //! <b>Effects</b>: Erases all the elements with the given key. - //! according to the comparison functor "equal_func". - //! Disposer::operator()(pointer) is called for the removed elements. - //! - //! <b>Returns</b>: The number of erased elements. - //! - //! <b>Complexity</b>: Average case O(this->count(value)). - //! Worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or equal_func throw. Basic guarantee. - //! - //! <b>Note</b>: Invalidates the iterators - //! to the erased elements. - template<class KeyType, class KeyHasher, class KeyValueEqual, class Disposer> - size_type erase_and_dispose(const KeyType& key, KeyHasher hash_func - ,KeyValueEqual equal_func, Disposer disposer) - { - size_type bucket_num; - std::size_t h; - siterator prev; - siterator it = this->priv_find(key, hash_func, equal_func, bucket_num, h, prev); - bool success = it != this->priv_invalid_local_it(); - size_type cnt(0); - if(!success){ - return 0; - } - else if(optimize_multikey){ - siterator last = bucket_type::s_iterator_to - (*node_traits::get_next(group_functions_t::get_last_in_group - (detail::dcast_bucket_ptr<node>(it.pointed_node()), optimize_multikey_t()))); - this->priv_erase_range_impl(bucket_num, prev, last, disposer, cnt); - } - else{ - //If found erase all equal values - bucket_type &b = this->priv_bucket_pointer()[bucket_num]; - for(siterator end_sit = b.end(); it != end_sit; ++cnt, ++it){ - slist_node_ptr n(it.pointed_node()); - const value_type &v = this->priv_value_from_slist_node(n); - if(compare_hash){ - std::size_t vh = this->priv_stored_or_compute_hash(v, store_hash_t()); - if(h != vh || !equal_func(key, v)){ - break; - } - } - else if(!equal_func(key, v)){ - break; - } - this->priv_size_traits().decrement(); - } - b.erase_after_and_dispose(prev, it, make_node_disposer(disposer)); - } - this->priv_erasure_update_cache(); - return cnt; - } - - //! <b>Effects</b>: Erases all of the elements. - //! - //! <b>Complexity</b>: Linear to the number of elements on the container. - //! if it's a safe-mode or auto-unlink value_type. Constant time otherwise. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased elements. No destructors are called. - void clear() - { - this->data_type::internal.priv_clear_buckets_and_cache(); - this->priv_size_traits().set_size(size_type(0)); - } - - //! <b>Requires</b>: Disposer::operator()(pointer) shouldn't throw. - //! - //! <b>Effects</b>: Erases all of the elements. - //! - //! <b>Complexity</b>: Linear to the number of elements on the container. - //! Disposer::operator()(pointer) is called for the removed elements. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: Invalidates the iterators (but not the references) - //! to the erased elements. No destructors are called. - template<class Disposer> - void clear_and_dispose(Disposer disposer) - { - if(!constant_time_size || !this->empty()){ - size_type num_buckets = this->bucket_count(); - bucket_ptr b = this->priv_bucket_pointer(); - for(; num_buckets--; ++b){ - b->clear_and_dispose(make_node_disposer(disposer)); - } - this->priv_size_traits().set_size(size_type(0)); - } - this->priv_initialize_cache(); - } - - //! <b>Effects</b>: Returns the number of contained elements with the given value - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - size_type count(const_reference value) const - { return this->count(value, this->priv_hasher(), this->priv_equal()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Returns the number of contained elements with the given key - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or equal throw. - template<class KeyType, class KeyHasher, class KeyValueEqual> - size_type count(const KeyType &key, const KeyHasher &hash_func, const KeyValueEqual &equal_func) const - { - size_type bucket_n1, bucket_n2, cnt; - this->priv_equal_range(key, hash_func, equal_func, bucket_n1, bucket_n2, cnt); - return cnt; - } - - //! <b>Effects</b>: Finds an iterator to the first element is equal to - //! "value" or end() if that element does not exist. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - iterator find(const_reference value) - { return this->find(value, this->priv_hasher(), this->priv_equal()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Finds an iterator to the first element whose key is - //! "key" according to the given hash and equality functor or end() if - //! that element does not exist. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or equal_func throw. - //! - //! <b>Note</b>: This function is used when constructing a value_type - //! is expensive and the value_type can be compared with a cheaper - //! key type. Usually this key is part of the value_type. - template<class KeyType, class KeyHasher, class KeyValueEqual> - iterator find(const KeyType &key, KeyHasher hash_func, KeyValueEqual equal_func) - { - size_type bucket_n; - std::size_t hash; - siterator prev; - siterator local_it = this->priv_find(key, hash_func, equal_func, bucket_n, hash, prev); - return iterator(local_it, &this->get_bucket_value_traits()); - } - - //! <b>Effects</b>: Finds a const_iterator to the first element whose key is - //! "key" or end() if that element does not exist. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - const_iterator find(const_reference value) const - { return this->find(value, this->priv_hasher(), this->priv_equal()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Finds an iterator to the first element whose key is - //! "key" according to the given hasher and equality functor or end() if - //! that element does not exist. - //! - //! <b>Complexity</b>: Average case O(1), worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or equal_func throw. - //! - //! <b>Note</b>: This function is used when constructing a value_type - //! is expensive and the value_type can be compared with a cheaper - //! key type. Usually this key is part of the value_type. - template<class KeyType, class KeyHasher, class KeyValueEqual> - const_iterator find - (const KeyType &key, KeyHasher hash_func, KeyValueEqual equal_func) const - { - size_type bucket_n; - std::size_t hash_value; - siterator prev; - siterator sit = this->priv_find(key, hash_func, equal_func, bucket_n, hash_value, prev); - return const_iterator(sit, &this->get_bucket_value_traits()); - } - - //! <b>Effects</b>: Returns a range containing all elements with values equivalent - //! to value. Returns std::make_pair(this->end(), this->end()) if no such - //! elements exist. - //! - //! <b>Complexity</b>: Average case O(this->count(value)). Worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - std::pair<iterator,iterator> equal_range(const_reference value) - { return this->equal_range(value, this->priv_hasher(), this->priv_equal()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Returns a range containing all elements with equivalent - //! keys. Returns std::make_pair(this->end(), this->end()) if no such - //! elements exist. - //! - //! <b>Complexity</b>: Average case O(this->count(key, hash_func, equal_func)). - //! Worst case O(this->size()). - //! - //! <b>Throws</b>: If hash_func or the equal_func throw. - //! - //! <b>Note</b>: This function is used when constructing a value_type - //! is expensive and the value_type can be compared with a cheaper - //! key type. Usually this key is part of the value_type. - template<class KeyType, class KeyHasher, class KeyValueEqual> - std::pair<iterator,iterator> equal_range - (const KeyType &key, KeyHasher hash_func, KeyValueEqual equal_func) - { - size_type bucket_n1, bucket_n2, cnt; - std::pair<siterator, siterator> ret = this->priv_equal_range - (key, hash_func, equal_func, bucket_n1, bucket_n2, cnt); - return std::pair<iterator, iterator> - (iterator(ret.first, &this->get_bucket_value_traits()), iterator(ret.second, &this->get_bucket_value_traits())); - } - - //! <b>Effects</b>: Returns a range containing all elements with values equivalent - //! to value. Returns std::make_pair(this->end(), this->end()) if no such - //! elements exist. - //! - //! <b>Complexity</b>: Average case O(this->count(value)). Worst case O(this->size()). - //! - //! <b>Throws</b>: If the internal hasher or the equality functor throws. - std::pair<const_iterator, const_iterator> - equal_range(const_reference value) const - { return this->equal_range(value, this->priv_hasher(), this->priv_equal()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! "equal_func" must be a equality function that induces - //! the same equality as key_equal. The difference is that - //! "equal_func" compares an arbitrary key with the contained values. - //! - //! <b>Effects</b>: Returns a range containing all elements with equivalent - //! keys. Returns std::make_pair(this->end(), this->end()) if no such - //! elements exist. - //! - //! <b>Complexity</b>: Average case O(this->count(key, hash_func, equal_func)). - //! Worst case O(this->size()). - //! - //! <b>Throws</b>: If the hasher or equal_func throw. - //! - //! <b>Note</b>: This function is used when constructing a value_type - //! is expensive and the value_type can be compared with a cheaper - //! key type. Usually this key is part of the value_type. - template<class KeyType, class KeyHasher, class KeyValueEqual> - std::pair<const_iterator,const_iterator> equal_range - (const KeyType &key, KeyHasher hash_func, KeyValueEqual equal_func) const - { - size_type bucket_n1, bucket_n2, cnt; - std::pair<siterator, siterator> ret = - this->priv_equal_range(key, hash_func, equal_func, bucket_n1, bucket_n2, cnt); - return std::pair<const_iterator, const_iterator> - ( const_iterator(ret.first, &this->get_bucket_value_traits()) - , const_iterator(ret.second, &this->get_bucket_value_traits())); - } - - //! <b>Requires</b>: value must be an lvalue and shall be in a unordered_set of - //! appropriate type. Otherwise the behavior is undefined. - //! - //! <b>Effects</b>: Returns: a valid iterator belonging to the unordered_set - //! that points to the value - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If the internal hash function throws. - iterator iterator_to(reference value) - { - return iterator(bucket_type::s_iterator_to - (this->priv_value_to_node(value)), &this->get_bucket_value_traits()); - } - - //! <b>Requires</b>: value must be an lvalue and shall be in a unordered_set of - //! appropriate type. Otherwise the behavior is undefined. - //! - //! <b>Effects</b>: Returns: a valid const_iterator belonging to the - //! unordered_set that points to the value - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If the internal hash function throws. - const_iterator iterator_to(const_reference value) const - { - node_reference r = *pointer_traits<node_ptr>::const_cast_from - (pointer_traits<const_node_ptr>::pointer_to(this->priv_value_to_node(value))); - siterator sit = bucket_type::s_iterator_to(r); - return const_iterator(sit, &this->get_bucket_value_traits()); - } - - //! <b>Requires</b>: value must be an lvalue and shall be in a unordered_set of - //! appropriate type. Otherwise the behavior is undefined. - //! - //! <b>Effects</b>: Returns: a valid local_iterator belonging to the unordered_set - //! that points to the value - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: This static function is available only if the <i>value traits</i> - //! is stateless. - static local_iterator s_local_iterator_to(reference value) - { - BOOST_STATIC_ASSERT((!stateful_value_traits)); - siterator sit = bucket_type::s_iterator_to(*value_traits::to_node_ptr(value)); - return local_iterator(sit, const_value_traits_ptr()); - } - - //! <b>Requires</b>: value must be an lvalue and shall be in a unordered_set of - //! appropriate type. Otherwise the behavior is undefined. - //! - //! <b>Effects</b>: Returns: a valid const_local_iterator belonging to - //! the unordered_set that points to the value - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: This static function is available only if the <i>value traits</i> - //! is stateless. - static const_local_iterator s_local_iterator_to(const_reference value) - { - BOOST_STATIC_ASSERT((!stateful_value_traits)); - node_reference r = *pointer_traits<node_ptr>::const_cast_from - (value_traits::to_node_ptr(value)); - siterator sit = bucket_type::s_iterator_to(r); - return const_local_iterator(sit, const_value_traits_ptr()); - } - - //! <b>Requires</b>: value must be an lvalue and shall be in a unordered_set of - //! appropriate type. Otherwise the behavior is undefined. - //! - //! <b>Effects</b>: Returns: a valid local_iterator belonging to the unordered_set - //! that points to the value - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - local_iterator local_iterator_to(reference value) - { - siterator sit = bucket_type::s_iterator_to(this->priv_value_to_node(value)); - return local_iterator(sit, this->priv_value_traits_ptr()); - } - - //! <b>Requires</b>: value must be an lvalue and shall be in a unordered_set of - //! appropriate type. Otherwise the behavior is undefined. - //! - //! <b>Effects</b>: Returns: a valid const_local_iterator belonging to - //! the unordered_set that points to the value - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - const_local_iterator local_iterator_to(const_reference value) const - { - node_reference r = *pointer_traits<node_ptr>::const_cast_from - (pointer_traits<const_node_ptr>::pointer_to(this->priv_value_to_node(value))); - siterator sit = bucket_type::s_iterator_to(r); - return const_local_iterator(sit, this->priv_value_traits_ptr()); - } - - //! <b>Effects</b>: Returns the number of buckets passed in the constructor - //! or the last rehash function. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - size_type bucket_count() const - { return this->priv_bucket_count(); } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns the number of elements in the nth bucket. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - size_type bucket_size(size_type n) const - { return this->priv_bucket_pointer()[n].size(); } - - //! <b>Effects</b>: Returns the index of the bucket in which elements - //! with keys equivalent to k would be found, if any such element existed. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If the hash functor throws. - //! - //! <b>Note</b>: the return value is in the range [0, this->bucket_count()). - size_type bucket(const key_type& k) const - { return this->bucket(k, this->priv_hasher()); } - - //! <b>Requires</b>: "hash_func" must be a hash function that induces - //! the same hash values as the stored hasher. The difference is that - //! "hash_func" hashes the given key instead of the value_type. - //! - //! <b>Effects</b>: Returns the index of the bucket in which elements - //! with keys equivalent to k would be found, if any such element existed. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: If hash_func throws. - //! - //! <b>Note</b>: the return value is in the range [0, this->bucket_count()). - template<class KeyType, class KeyHasher> - size_type bucket(const KeyType& k, const KeyHasher &hash_func) const - { return this->priv_hash_to_bucket(hash_func(k)); } - - //! <b>Effects</b>: Returns the bucket array pointer passed in the constructor - //! or the last rehash function. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - bucket_ptr bucket_pointer() const - { return this->priv_bucket_pointer(); } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns a local_iterator pointing to the beginning - //! of the sequence stored in the bucket n. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: [this->begin(n), this->end(n)) is a valid range - //! containing all of the elements in the nth bucket. - local_iterator begin(size_type n) - { return local_iterator(this->priv_bucket_pointer()[n].begin(), this->priv_value_traits_ptr()); } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns a const_local_iterator pointing to the beginning - //! of the sequence stored in the bucket n. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: [this->begin(n), this->end(n)) is a valid range - //! containing all of the elements in the nth bucket. - const_local_iterator begin(size_type n) const - { return this->cbegin(n); } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns a const_local_iterator pointing to the beginning - //! of the sequence stored in the bucket n. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: [this->begin(n), this->end(n)) is a valid range - //! containing all of the elements in the nth bucket. - const_local_iterator cbegin(size_type n) const - { - bucket_reference br = pointer_traits<bucket_ptr>::const_cast_from(this->priv_bucket_pointer())[n]; - return const_local_iterator(br.begin(), this->priv_value_traits_ptr()); - } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns a local_iterator pointing to the end - //! of the sequence stored in the bucket n. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: [this->begin(n), this->end(n)) is a valid range - //! containing all of the elements in the nth bucket. - local_iterator end(size_type n) - { return local_iterator(this->priv_bucket_pointer()[n].end(), this->priv_value_traits_ptr()); } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns a const_local_iterator pointing to the end - //! of the sequence stored in the bucket n. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: [this->begin(n), this->end(n)) is a valid range - //! containing all of the elements in the nth bucket. - const_local_iterator end(size_type n) const - { return this->cend(n); } - - //! <b>Requires</b>: n is in the range [0, this->bucket_count()). - //! - //! <b>Effects</b>: Returns a const_local_iterator pointing to the end - //! of the sequence stored in the bucket n. - //! - //! <b>Complexity</b>: Constant. - //! - //! <b>Throws</b>: Nothing. - //! - //! <b>Note</b>: [this->begin(n), this->end(n)) is a valid range - //! containing all of the elements in the nth bucket. - const_local_iterator cend(size_type n) const - { - bucket_reference br = pointer_traits<bucket_ptr>::const_cast_from(this->priv_bucket_pointer())[n]; - return const_local_iterator ( br.end(), this->priv_value_traits_ptr()); - } - - //! <b>Requires</b>: new_bucket_traits can hold a pointer to a new bucket array - //! or the same as the old bucket array with a different length. new_size is the length of the - //! the array pointed by new_buckets. If new_bucket_traits.bucket_begin() == this->bucket_pointer() - //! new_bucket_traits.bucket_count() can be bigger or smaller than this->bucket_count(). - //! 'new_bucket_traits' copy constructor should not throw. - //! - //! <b>Effects</b>: Updates the internal reference with the new bucket, erases - //! the values from the old bucket and inserts then in the new one. - //! Bucket traits hold by *this is assigned from new_bucket_traits. - //! If the container is configured as incremental<>, the split bucket is set - //! to the new bucket_count(). - //! - //! If store_hash option is true, this method does not use the hash function. - //! - //! <b>Complexity</b>: Average case linear in this->size(), worst case quadratic. - //! - //! <b>Throws</b>: If the hasher functor throws. Basic guarantee. - void rehash(const bucket_traits &new_bucket_traits) - { - const bucket_ptr new_buckets = new_bucket_traits.bucket_begin(); - size_type new_bucket_count = new_bucket_traits.bucket_count(); - const bucket_ptr old_buckets = this->priv_bucket_pointer(); - size_type old_bucket_count = this->priv_bucket_count(); - - //Check power of two bucket array if the option is activated - BOOST_INTRUSIVE_INVARIANT_ASSERT - (!power_2_buckets || (0 == (new_bucket_count & (new_bucket_count-1u)))); - - size_type n = this->priv_get_cache_bucket_num(); - const bool same_buffer = old_buckets == new_buckets; - //If the new bucket length is a common factor - //of the old one we can avoid hash calculations. - const bool fast_shrink = (!incremental) && (old_bucket_count > new_bucket_count) && - (power_2_buckets ||(old_bucket_count % new_bucket_count) == 0); - //If we are shrinking the same bucket array and it's - //is a fast shrink, just rehash the last nodes - size_type new_first_bucket_num = new_bucket_count; - if(same_buffer && fast_shrink && (n < new_bucket_count)){ - n = new_bucket_count; - new_first_bucket_num = this->priv_get_cache_bucket_num(); - } - - //Anti-exception stuff: they destroy the elements if something goes wrong. - //If the source and destination buckets are the same, the second rollback function - //is harmless, because all elements have been already unlinked and destroyed - typedef detail::init_disposer<node_algorithms> NodeDisposer; - NodeDisposer node_disp; - bucket_type & newbuck = new_buckets[0]; - bucket_type & oldbuck = old_buckets[0]; - detail::exception_array_disposer<bucket_type, NodeDisposer, size_type> - rollback1(newbuck, node_disp, new_bucket_count); - detail::exception_array_disposer<bucket_type, NodeDisposer, size_type> - rollback2(oldbuck, node_disp, old_bucket_count); - - //Put size in a safe value for rollback exception - size_type size_backup = this->priv_size_traits().get_size(); - this->priv_size_traits().set_size(0); - //Put cache to safe position - this->priv_initialize_cache(); - this->priv_insertion_update_cache(size_type(0u)); - - //Iterate through nodes - for(; n < old_bucket_count; ++n){ - bucket_type &old_bucket = old_buckets[n]; - - if(!fast_shrink){ - siterator before_i(old_bucket.before_begin()); - siterator end_sit(old_bucket.end()); - siterator i(old_bucket.begin()); - for(;i != end_sit; ++i){ - const value_type &v = this->priv_value_from_slist_node(i.pointed_node()); - const std::size_t hash_value = this->priv_stored_or_compute_hash(v, store_hash_t()); - const size_type new_n = detail::hash_to_bucket_split<power_2_buckets, incremental>(hash_value, new_bucket_count, new_bucket_count); - if(cache_begin && new_n < new_first_bucket_num) - new_first_bucket_num = new_n; - siterator last = bucket_type::s_iterator_to - (*group_functions_t::get_last_in_group - (detail::dcast_bucket_ptr<node>(i.pointed_node()), optimize_multikey_t())); - if(same_buffer && new_n == n){ - before_i = last; - } - else{ - bucket_type &new_b = new_buckets[new_n]; - new_b.splice_after(new_b.before_begin(), old_bucket, before_i, last); - } - i = before_i; - } - } - else{ - const size_type new_n = detail::hash_to_bucket_split<power_2_buckets, incremental>(n, new_bucket_count, new_bucket_count); - if(cache_begin && new_n < new_first_bucket_num) - new_first_bucket_num = new_n; - bucket_type &new_b = new_buckets[new_n]; - if(!old_bucket.empty()){ - new_b.splice_after( new_b.before_begin() - , old_bucket - , old_bucket.before_begin() - , hashtable_impl::priv_get_last(old_bucket)); - } - } - } - - this->priv_size_traits().set_size(size_backup); - this->priv_split_traits().set_size(new_bucket_count); - this->priv_bucket_traits() = new_bucket_traits; - this->priv_initialize_cache(); - this->priv_insertion_update_cache(new_first_bucket_num); - rollback1.release(); - rollback2.release(); - } - - //! <b>Requires</b>: - //! - //! <b>Effects</b>: - //! - //! <b>Complexity</b>: - //! - //! <b>Throws</b>: - //! - //! <b>Note</b>: this method is only available if incremental<true> option is activated. - bool incremental_rehash(bool grow = true) - { - //This function is only available for containers with incremental hashing - BOOST_STATIC_ASSERT(( incremental && power_2_buckets )); - const size_type split_idx = this->priv_split_traits().get_size(); - const size_type bucket_cnt = this->priv_bucket_count(); - const bucket_ptr buck_ptr = this->priv_bucket_pointer(); - - if(grow){ - //Test if the split variable can be changed - if(split_idx >= bucket_cnt) - return false; - - const size_type bucket_to_rehash = split_idx - bucket_cnt/2; - bucket_type &old_bucket = buck_ptr[bucket_to_rehash]; - siterator before_i(old_bucket.before_begin()); - const siterator end_sit(old_bucket.end()); - siterator i(old_bucket.begin()); - this->priv_split_traits().increment(); - - //Anti-exception stuff: if an exception is thrown while - //moving elements from old_bucket to the target bucket, all moved - //elements are moved back to the original one. - detail::incremental_rehash_rollback<bucket_type, split_traits> rollback - ( buck_ptr[split_idx], old_bucket, this->priv_split_traits()); - for(;i != end_sit; ++i){ - const value_type &v = this->priv_value_from_slist_node(i.pointed_node()); - const std::size_t hash_value = this->priv_stored_or_compute_hash(v, store_hash_t()); - const size_type new_n = this->priv_hash_to_bucket(hash_value); - siterator last = bucket_type::s_iterator_to - (*group_functions_t::get_last_in_group - (detail::dcast_bucket_ptr<node>(i.pointed_node()), optimize_multikey_t())); - if(new_n == bucket_to_rehash){ - before_i = last; - } - else{ - bucket_type &new_b = buck_ptr[new_n]; - new_b.splice_after(new_b.before_begin(), old_bucket, before_i, last); - } - i = before_i; - } - rollback.release(); - this->priv_erasure_update_cache(); - return true; - } - else{ - //Test if the split variable can be changed - if(split_idx <= bucket_cnt/2) - return false; - const size_type target_bucket_num = split_idx - 1 - bucket_cnt/2; - bucket_type &target_bucket = buck_ptr[target_bucket_num]; - bucket_type &source_bucket = buck_ptr[split_idx-1]; - target_bucket.splice_after(target_bucket.cbefore_begin(), source_bucket); - this->priv_split_traits().decrement(); - this->priv_insertion_update_cache(target_bucket_num); - return true; - } - } - - //! <b>Effects</b>: If new_bucket_traits.bucket_count() is not - //! this->bucket_count()/2 or this->bucket_count()*2, or - //! this->split_bucket() != new_bucket_traits.bucket_count() returns false - //! and does nothing. - //! - //! Otherwise, copy assigns new_bucket_traits to the internal bucket_traits - //! and transfers all the objects from old buckets to the new ones. - //! - //! <b>Complexity</b>: Linear to size(). - //! - //! <b>Throws</b>: Nothing - //! - //! <b>Note</b>: this method is only available if incremental<true> option is activated. - bool incremental_rehash(const bucket_traits &new_bucket_traits) - { - //This function is only available for containers with incremental hashing - BOOST_STATIC_ASSERT(( incremental && power_2_buckets )); - size_type new_bucket_traits_size = new_bucket_traits.bucket_count(); - size_type cur_bucket_traits = this->priv_bucket_count(); - if(new_bucket_traits_size/2 != cur_bucket_traits && new_bucket_traits_size != cur_bucket_traits/2){ - return false; - } - - const size_type split_idx = this->split_count(); - - if(new_bucket_traits_size/2 == cur_bucket_traits){ - //Test if the split variable can be changed - if(!(split_idx >= cur_bucket_traits)) - return false; - } - else{ - //Test if the split variable can be changed - if(!(split_idx <= cur_bucket_traits/2)) - return false; - } - - const size_type ini_n = this->priv_get_cache_bucket_num(); - const bucket_ptr old_buckets = this->priv_bucket_pointer(); - this->priv_bucket_traits() = new_bucket_traits; - if(new_bucket_traits.bucket_begin() != old_buckets){ - for(size_type n = ini_n; n < split_idx; ++n){ - bucket_type &new_bucket = new_bucket_traits.bucket_begin()[n]; - bucket_type &old_bucket = old_buckets[n]; - new_bucket.splice_after(new_bucket.cbefore_begin(), old_bucket); - } - //Put cache to safe position - this->priv_initialize_cache(); - this->priv_insertion_update_cache(ini_n); - } - return true; - } - - //! <b>Requires</b>: - //! - //! <b>Effects</b>: - //! - //! <b>Complexity</b>: - //! - //! <b>Throws</b>: - size_type split_count() const - { - //This function is only available if incremental hashing is activated - BOOST_STATIC_ASSERT(( incremental && power_2_buckets )); - return this->priv_split_traits().get_size(); - } - - //! <b>Effects</b>: Returns the nearest new bucket count optimized for - //! the container that is bigger or equal than n. This suggestion can be - //! used to create bucket arrays with a size that will usually improve - //! container's performance. If such value does not exist, the - //! higher possible value is returned. - //! - //! <b>Complexity</b>: Amortized constant time. - //! - //! <b>Throws</b>: Nothing. - static size_type suggested_upper_bucket_count(size_type n) - { - const std::size_t *primes = &detail::prime_list_holder<0>::prime_list[0]; - const std::size_t *primes_end = primes + detail::prime_list_holder<0>::prime_list_size; - std::size_t const* bound = std::lower_bound(primes, primes_end, n); - bound -= (bound == primes_end); - return size_type(*bound); - } - - //! <b>Effects</b>: Returns the nearest new bucket count optimized for - //! the container that is smaller or equal than n. This suggestion can be - //! used to create bucket arrays with a size that will usually improve - //! container's performance. If such value does not exist, the - //! lowest possible value is returned. - //! - //! <b>Complexity</b>: Amortized constant time. - //! - //! <b>Throws</b>: Nothing. - static size_type suggested_lower_bucket_count(size_type n) - { - const std::size_t *primes = &detail::prime_list_holder<0>::prime_list[0]; - const std::size_t *primes_end = primes + detail::prime_list_holder<0>::prime_list_size; - size_type const* bound = std::upper_bound(primes, primes_end, n); - bound -= (bound != primes); - return size_type(*bound); - } - /// @cond - private: - size_traits &priv_size_traits() - { return static_cast<size_traits&>(static_cast<data_type&>(*this)); } - - const size_traits &priv_size_traits() const - { return static_cast<const size_traits&>(static_cast<const data_type&>(*this)); } - - bucket_ptr priv_bucket_pointer() const - { return this->data_type::internal.internal.internal.internal.priv_bucket_pointer(); } - - SizeType priv_bucket_count() const - { return this->data_type::internal.internal.internal.internal.priv_bucket_count(); } - - const bucket_plus_vtraits<ValueTraits, BucketTraits> &get_bucket_value_traits() const - { return this->data_type::internal.internal.internal.internal.get_bucket_value_traits(); } - - bucket_plus_vtraits<ValueTraits, BucketTraits> &get_bucket_value_traits() - { return this->data_type::internal.internal.internal.internal.get_bucket_value_traits(); } - - bucket_traits &priv_bucket_traits() - { return this->data_type::internal.internal.internal.internal.priv_bucket_traits(); } - - const bucket_traits &priv_bucket_traits() const - { return this->data_type::internal.internal.internal.internal.priv_bucket_traits(); } - - value_traits &priv_value_traits() - { return this->data_type::internal.internal.internal.internal.priv_value_traits(); } - - const value_traits &priv_value_traits() const - { return this->data_type::internal.internal.internal.internal.priv_value_traits(); } - - const_value_traits_ptr priv_value_traits_ptr() const - { return this->data_type::internal.internal.internal.internal.priv_value_traits_ptr(); } - - siterator priv_invalid_local_it() const - { return this->data_type::internal.internal.internal.internal.priv_invalid_local_it(); } - - split_traits &priv_split_traits() - { return this->data_type::internal.priv_split_traits(); } - - const split_traits &priv_split_traits() const - { return this->data_type::internal.priv_split_traits(); } - - bucket_ptr priv_get_cache() - { return this->data_type::internal.internal.priv_get_cache(); } - - void priv_initialize_cache() - { return this->data_type::internal.internal.priv_initialize_cache(); } - - siterator priv_begin() const - { return this->data_type::internal.internal.priv_begin(); } - - const value_equal &priv_equal() const - { return this->data_type::internal.internal.priv_equal(); } - - value_equal &priv_equal() - { return this->data_type::internal.internal.priv_equal(); } - - const hasher &priv_hasher() const - { return this->data_type::internal.internal.internal.priv_hasher(); } - - hasher &priv_hasher() - { return this->data_type::internal.internal.internal.priv_hasher(); } - - void priv_swap_cache(hashtable_impl &h) - { this->data_type::internal.internal.priv_swap_cache(h.data_type::internal.internal); } - - node &priv_value_to_node(value_type &v) - { return this->data_type::internal.internal.internal.internal.priv_value_to_node(v); } - - const node &priv_value_to_node(const value_type &v) const - { return this->data_type::internal.internal.internal.internal.priv_value_to_node(v); } - - SizeType priv_get_cache_bucket_num() - { return this->data_type::internal.internal.priv_get_cache_bucket_num(); } - - void priv_insertion_update_cache(SizeType n) - { return this->data_type::internal.internal.priv_insertion_update_cache(n); } - - template<bool Boolean> - std::size_t priv_stored_or_compute_hash(const value_type &v, detail::bool_<Boolean> b) const - { return this->data_type::internal.internal.internal.priv_stored_or_compute_hash(v, b); } - - value_type &priv_value_from_slist_node(slist_node_ptr n) - { return this->data_type::internal.internal.internal.internal.priv_value_from_slist_node(n); } - - const value_type &priv_value_from_slist_node(slist_node_ptr n) const - { return this->data_type::internal.internal.internal.internal.priv_value_from_slist_node(n); } - - void priv_erasure_update_cache_range(SizeType first_bucket_num, SizeType last_bucket_num) - { return this->data_type::internal.internal.priv_erasure_update_cache_range(first_bucket_num, last_bucket_num); } - - void priv_erasure_update_cache() - { return this->data_type::internal.internal.priv_erasure_update_cache(); } - - static std::size_t priv_stored_hash(slist_node_ptr n, detail::true_ true_value) - { return bucket_plus_vtraits<ValueTraits, BucketTraits>::priv_stored_hash(n, true_value); } - - static std::size_t priv_stored_hash(slist_node_ptr n, detail::false_ false_value) - { return bucket_plus_vtraits<ValueTraits, BucketTraits>::priv_stored_hash(n, false_value); } - - std::size_t priv_hash_to_bucket(std::size_t hash_value) const - { - return detail::hash_to_bucket_split<power_2_buckets, incremental> - (hash_value, this->priv_bucket_traits().bucket_count(), this->priv_split_traits().get_size()); - } - - template<class Disposer> - void priv_erase_range_impl - (size_type bucket_num, siterator before_first_it, siterator end_sit, Disposer disposer, size_type &num_erased) - { - const bucket_ptr buckets = this->priv_bucket_pointer(); - bucket_type &b = buckets[bucket_num]; - - if(before_first_it == b.before_begin() && end_sit == b.end()){ - this->priv_erase_range_impl(bucket_num, 1, disposer, num_erased); - } - else{ - num_erased = 0; - siterator to_erase(before_first_it); - ++to_erase; - slist_node_ptr end_ptr = end_sit.pointed_node(); - while(to_erase != end_sit){ - group_functions_t::erase_from_group(end_ptr, detail::dcast_bucket_ptr<node>(to_erase.pointed_node()), optimize_multikey_t()); - to_erase = b.erase_after_and_dispose(before_first_it, make_node_disposer(disposer)); - ++num_erased; - } - this->priv_size_traits().set_size(this->priv_size_traits().get_size()-num_erased); - } - } - - template<class Disposer> - void priv_erase_range_impl - (size_type first_bucket_num, size_type num_buckets, Disposer disposer, size_type &num_erased) - { - //Now fully clear the intermediate buckets - const bucket_ptr buckets = this->priv_bucket_pointer(); - num_erased = 0; - for(size_type i = first_bucket_num; i < (num_buckets + first_bucket_num); ++i){ - bucket_type &b = buckets[i]; - siterator b_begin(b.before_begin()); - siterator nxt(b_begin); - ++nxt; - siterator end_sit(b.end()); - while(nxt != end_sit){ - group_functions_t::init_group(detail::dcast_bucket_ptr<node>(nxt.pointed_node()), optimize_multikey_t()); - nxt = b.erase_after_and_dispose - (b_begin, make_node_disposer(disposer)); - this->priv_size_traits().decrement(); - ++num_erased; - } - } - } - - template<class Disposer> - void priv_erase_range( siterator before_first_it, size_type first_bucket - , siterator last_it, size_type last_bucket - , Disposer disposer) - { - size_type num_erased; - if (first_bucket == last_bucket){ - this->priv_erase_range_impl(first_bucket, before_first_it, last_it, disposer, num_erased); - } - else { - bucket_type *b = (&this->priv_bucket_pointer()[0]); - this->priv_erase_range_impl(first_bucket, before_first_it, b[first_bucket].end(), disposer, num_erased); - if(size_type n = (last_bucket - first_bucket - 1)) - this->priv_erase_range_impl(first_bucket + 1, n, disposer, num_erased); - this->priv_erase_range_impl(last_bucket, b[last_bucket].before_begin(), last_it, disposer, num_erased); - } - } - - std::size_t priv_get_bucket_num(siterator it) - { return this->priv_get_bucket_num_hash_dispatch(it, store_hash_t()); } - - std::size_t priv_get_bucket_num_hash_dispatch(siterator it, detail::true_) //store_hash - { - return this->priv_hash_to_bucket - (this->priv_stored_hash(it.pointed_node(), store_hash_t())); - } - - std::size_t priv_get_bucket_num_hash_dispatch(siterator it, detail::false_) //NO store_hash - { return this->data_type::internal.internal.internal.internal.priv_get_bucket_num_no_hash_store(it, optimize_multikey_t()); } - - static siterator priv_get_previous(bucket_type &b, siterator i) - { return bucket_plus_vtraits_t::priv_get_previous(b, i, optimize_multikey_t()); } - - static siterator priv_get_last(bucket_type &b) - { return bucket_plus_vtraits_t::priv_get_last(b, optimize_multikey_t()); } - - template<class Disposer> - void priv_erase(const_iterator i, Disposer disposer, detail::true_) - { - slist_node_ptr elem(i.slist_it().pointed_node()); - slist_node_ptr f_bucket_end, l_bucket_end; - if(store_hash){ - f_bucket_end = l_bucket_end = - (this->priv_bucket_pointer() - [this->priv_hash_to_bucket - (this->priv_stored_hash(elem, store_hash_t())) - ]).before_begin().pointed_node(); - } - else{ - f_bucket_end = this->priv_bucket_pointer()->cend().pointed_node(); - l_bucket_end = f_bucket_end + this->priv_bucket_count() - 1; - } - node_ptr nxt_in_group; - siterator prev = bucket_type::s_iterator_to - (*group_functions_t::get_previous_and_next_in_group - ( elem, nxt_in_group, f_bucket_end, l_bucket_end) - ); - bucket_type::s_erase_after_and_dispose(prev, make_node_disposer(disposer)); - if(nxt_in_group) - group_algorithms::unlink_after(nxt_in_group); - if(safemode_or_autounlink) - group_algorithms::init(detail::dcast_bucket_ptr<node>(elem)); - } - - template <class Disposer> - void priv_erase(const_iterator i, Disposer disposer, detail::false_) - { - siterator to_erase(i.slist_it()); - bucket_type &b = this->priv_bucket_pointer()[this->priv_get_bucket_num(to_erase)]; - siterator prev(this->priv_get_previous(b, to_erase)); - b.erase_after_and_dispose(prev, make_node_disposer(disposer)); - } - - template<class KeyType, class KeyHasher, class KeyValueEqual> - siterator priv_find - ( const KeyType &key, KeyHasher hash_func - , KeyValueEqual equal_func, size_type &bucket_number, std::size_t &h, siterator &previt) const - { - h = hash_func(key); - return this->priv_find_with_hash(key, equal_func, bucket_number, h, previt); - } - - template<class KeyType, class KeyValueEqual> - siterator priv_find_with_hash - ( const KeyType &key, KeyValueEqual equal_func, size_type &bucket_number, const std::size_t h, siterator &previt) const - { - bucket_number = this->priv_hash_to_bucket(h); - bucket_type &b = this->priv_bucket_pointer()[bucket_number]; - previt = b.before_begin(); - if(constant_time_size && this->empty()){ - return this->priv_invalid_local_it(); - } - - siterator it = previt; - ++it; - - while(it != b.end()){ - const value_type &v = this->priv_value_from_slist_node(it.pointed_node()); - if(compare_hash){ - std::size_t vh = this->priv_stored_or_compute_hash(v, store_hash_t()); - if(h == vh && equal_func(key, v)){ - return it; - } - } - else if(equal_func(key, v)){ - return it; - } - if(optimize_multikey){ - previt = bucket_type::s_iterator_to - (*group_functions_t::get_last_in_group - (detail::dcast_bucket_ptr<node>(it.pointed_node()), optimize_multikey_t())); - it = previt; - } - else{ - previt = it; - } - ++it; - } - previt = b.before_begin(); - return this->priv_invalid_local_it(); - } - - iterator priv_insert_equal_with_hash(reference value, std::size_t hash_value) - { - size_type bucket_num; - siterator prev; - siterator it = this->priv_find_with_hash - (value, this->priv_equal(), bucket_num, hash_value, prev); - return this->priv_insert_equal_find(value, bucket_num, hash_value, it); - } - - iterator priv_insert_equal_find(reference value, size_type bucket_num, std::size_t hash_value, siterator it) - { - bucket_type &b = this->priv_bucket_pointer()[bucket_num]; - bool found_equal = it != this->priv_invalid_local_it(); - if(!found_equal){ - it = b.before_begin(); - } - //Now store hash if needed - node_ptr n = pointer_traits<node_ptr>::pointer_to(this->priv_value_to_node(value)); - node_functions_t::store_hash(n, hash_value, store_hash_t()); - //Checks for some modes - if(safemode_or_autounlink) - BOOST_INTRUSIVE_SAFE_HOOK_DEFAULT_ASSERT(node_algorithms::unique(n)); - //Shortcut for optimize_multikey cases - if(optimize_multikey){ - node_ptr first_in_group = found_equal ? - detail::dcast_bucket_ptr<node>(it.pointed_node()) : node_ptr(); - group_functions_t::insert_in_group(first_in_group, n, optimize_multikey_t()); - } - //Update cache and increment size if needed - this->priv_insertion_update_cache(bucket_num); - this->priv_size_traits().increment(); - //Insert the element in the bucket after it - return iterator(b.insert_after(it, *n), &this->get_bucket_value_traits()); - } - - template<class KeyType, class KeyHasher, class KeyValueEqual> - std::pair<siterator, siterator> priv_equal_range - ( const KeyType &key - , KeyHasher hash_func - , KeyValueEqual equal_func - , size_type &bucket_number_first - , size_type &bucket_number_second - , size_type &cnt) const - { - std::size_t h; - cnt = 0; - siterator prev; - //Let's see if the element is present - std::pair<siterator, siterator> to_return - ( this->priv_find(key, hash_func, equal_func, bucket_number_first, h, prev) - , this->priv_invalid_local_it()); - if(to_return.first == to_return.second){ - bucket_number_second = bucket_number_first; - return to_return; - } - { - //If it's present, find the first that it's not equal in - //the same bucket - bucket_type &b = this->priv_bucket_pointer()[bucket_number_first]; - siterator it = to_return.first; - if(optimize_multikey){ - to_return.second = bucket_type::s_iterator_to - (*node_traits::get_next(group_functions_t::get_last_in_group - (detail::dcast_bucket_ptr<node>(it.pointed_node()), optimize_multikey_t()))); - cnt = std::distance(it, to_return.second); - if(to_return.second != b.end()){ - bucket_number_second = bucket_number_first; - return to_return; - } - } - else{ - ++cnt; - ++it; - while(it != b.end()){ - const value_type &v = this->priv_value_from_slist_node(it.pointed_node()); - if(compare_hash){ - std::size_t hv = this->priv_stored_or_compute_hash(v, store_hash_t()); - if(hv != h || !equal_func(key, v)){ - to_return.second = it; - bucket_number_second = bucket_number_first; - return to_return; - } - } - else if(!equal_func(key, v)){ - to_return.second = it; - bucket_number_second = bucket_number_first; - return to_return; - } - ++it; - ++cnt; - } - } - } - - //If we reached the end, find the first, non-empty bucket - for(bucket_number_second = bucket_number_first+1 - ; bucket_number_second != this->priv_bucket_count() - ; ++bucket_number_second){ - bucket_type &b = this->priv_bucket_pointer()[bucket_number_second]; - if(!b.empty()){ - to_return.second = b.begin(); - return to_return; - } - } - - //Otherwise, return the end node - to_return.second = this->priv_invalid_local_it(); - return to_return; - } - /// @endcond -}; - -/// @cond -#if !defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES) -template < class T - , bool UniqueKeys - , class PackedOptions - > -#else -template <class T, bool UniqueKeys, class ...Options> -#endif -struct make_bucket_traits -{ - //Real value traits must be calculated from options - typedef typename detail::get_value_traits - <T, typename PackedOptions::proto_value_traits>::type value_traits; - - typedef typename PackedOptions::bucket_traits specified_bucket_traits; - - //Real bucket traits must be calculated from options and calculated value_traits - typedef typename detail::get_slist_impl - <typename detail::reduced_slist_node_traits - <typename value_traits::node_traits>::type - >::type slist_impl; - - typedef typename - detail::if_c< detail::is_same - < specified_bucket_traits - , default_bucket_traits - >::value - , detail::bucket_traits_impl<slist_impl> - , specified_bucket_traits - >::type type; -}; -/// @endcond - -//! Helper metafunction to define a \c hashtable that yields to the same type when the -//! same options (either explicitly or implicitly) are used. -#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED) || defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES) -template<class T, class ...Options> -#else -template<class T, class O1 = void, class O2 = void - , class O3 = void, class O4 = void - , class O5 = void, class O6 = void - , class O7 = void, class O8 = void - , class O9 = void, class O10= void - > -#endif -struct make_hashtable -{ - /// @cond - typedef typename pack_options - < hashtable_defaults, - #if !defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES) - O1, O2, O3, O4, O5, O6, O7, O8, O9, O10 - #else - Options... - #endif - >::type packed_options; - - typedef typename detail::get_value_traits - <T, typename packed_options::proto_value_traits>::type value_traits; - - typedef typename make_bucket_traits - <T, false, packed_options>::type bucket_traits; - - typedef hashtable_impl - < value_traits - , typename packed_options::hash - , typename packed_options::equal - , typename packed_options::size_type - , bucket_traits - , (std::size_t(false)*hash_bool_flags::unique_keys_pos) - | (std::size_t(packed_options::constant_time_size)*hash_bool_flags::constant_time_size_pos) - | (std::size_t(packed_options::power_2_buckets)*hash_bool_flags::power_2_buckets_pos) - | (std::size_t(packed_options::cache_begin)*hash_bool_flags::cache_begin_pos) - | (std::size_t(packed_options::compare_hash)*hash_bool_flags::compare_hash_pos) - | (std::size_t(packed_options::incremental)*hash_bool_flags::incremental_pos) - > implementation_defined; - - /// @endcond - typedef implementation_defined type; -}; - -#if !defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED) - -#if defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES) -template<class T, class ...Options> -#else -template<class T, class O1, class O2, class O3, class O4, class O5, class O6, class O7, class O8, class O9, class O10> -#endif -class hashtable - : public make_hashtable<T, - #if !defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES) - O1, O2, O3, O4, O5, O6, O7, O8, O9, O10 - #else - Options... - #endif - >::type -{ - typedef typename make_hashtable<T, - #if !defined(BOOST_INTRUSIVE_VARIADIC_TEMPLATES) - O1, O2, O3, O4, O5, O6, O7, O8, O9, O10 - #else - Options... - #endif - >::type Base; - BOOST_MOVABLE_BUT_NOT_COPYABLE(hashtable) - - public: - typedef typename Base::value_traits value_traits; - typedef typename Base::iterator iterator; - typedef typename Base::const_iterator const_iterator; - typedef typename Base::bucket_ptr bucket_ptr; - typedef typename Base::size_type size_type; - typedef typename Base::hasher hasher; - typedef typename Base::bucket_traits bucket_traits; - typedef typename Base::key_equal key_equal; - - //Assert if passed value traits are compatible with the type - BOOST_STATIC_ASSERT((detail::is_same<typename value_traits::value_type, T>::value)); - - explicit hashtable ( const bucket_traits &b_traits - , const hasher & hash_func = hasher() - , const key_equal &equal_func = key_equal() - , const value_traits &v_traits = value_traits()) - : Base(b_traits, hash_func, equal_func, v_traits) - {} - - hashtable(BOOST_RV_REF(hashtable) x) - : Base(::boost::move(static_cast<Base&>(x))) - {} - - hashtable& operator=(BOOST_RV_REF(hashtable) x) - { return static_cast<hashtable&>(this->Base::operator=(::boost::move(static_cast<Base&>(x)))); } -}; - -#endif - -} //namespace intrusive -} //namespace boost - -#include <boost/intrusive/detail/config_end.hpp> - -#endif //BOOST_INTRUSIVE_HASHTABLE_HPP |