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ecency-mobile/ios/Pods/boost-for-react-native/boost/intrusive/hashtable.hpp

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/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2006-2015
//
// 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>
//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/is_stateful_value_traits.hpp>
#include <boost/intrusive/detail/node_to_value.hpp>
#include <boost/intrusive/detail/exception_disposer.hpp>
#include <boost/intrusive/detail/node_cloner_disposer.hpp>
#include <boost/intrusive/detail/simple_disposers.hpp>
#include <boost/intrusive/detail/size_holder.hpp>
#include <boost/intrusive/detail/iterator.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>
//boost
#include <boost/functional/hash.hpp>
#include <boost/intrusive/detail/assert.hpp>
#include <boost/static_assert.hpp>
#include <boost/move/utility_core.hpp>
#include <boost/move/adl_move_swap.hpp>
//std C++
#include <boost/intrusive/detail/minimal_less_equal_header.hpp> //std::equal_to
#include <boost/intrusive/detail/minimal_pair_header.hpp> //std::pair
#include <algorithm> //std::lower_bound, std::upper_bound
#include <cstddef> //std::size_t
#if defined(BOOST_HAS_PRAGMA_ONCE)
# pragma once
#endif
namespace boost {
namespace intrusive {
/// @cond
template<class InputIt, class T>
InputIt priv_algo_find(InputIt first, InputIt last, const T& value)
{
for (; first != last; ++first) {
if (*first == value) {
return first;
}
}
return last;
}
template<class InputIt, class T>
typename boost::intrusive::iterator_traits<InputIt>::difference_type
priv_algo_count(InputIt first, InputIt last, const T& value)
{
typename boost::intrusive::iterator_traits<InputIt>::difference_type ret = 0;
for (; first != last; ++first) {
if (*first == value) {
ret++;
}
}
return ret;
}
template <class ForwardIterator1, class ForwardIterator2>
bool priv_algo_is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2)
{
typedef typename
boost::intrusive::iterator_traits<ForwardIterator2>::difference_type
distance_type;
//Efficiently compare identical prefixes: O(N) if sequences
//have the same elements in the same order.
for ( ; first1 != last1; ++first1, ++first2){
if (! (*first1 == *first2))
break;
}
if (first1 == last1){
return true;
}
//Establish last2 assuming equal ranges by iterating over the
//rest of the list.
ForwardIterator2 last2 = first2;
boost::intrusive::iterator_advance(last2, boost::intrusive::iterator_distance(first1, last1));
for(ForwardIterator1 scan = first1; scan != last1; ++scan){
if (scan != (priv_algo_find)(first1, scan, *scan)){
continue; //We've seen this one before.
}
distance_type matches = (priv_algo_count)(first2, last2, *scan);
if (0 == matches || (priv_algo_count)(scan, last1, *scan != matches)){
return false;
}
}
return true;
}
template<int Dummy = 0>
struct prime_list_holder
{
static const std::size_t prime_list[];
static const std::size_t prime_list_size;
};
#if !defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
//We only support LLP64(Win64) or LP64(most Unix) data models
#ifdef _WIN64 //In 64 bit windows sizeof(size_t) == sizeof(unsigned long long)
#define BOOST_INTRUSIVE_PRIME_C(NUMBER) NUMBER##ULL
#define BOOST_INTRUSIVE_64_BIT_SIZE_T 1
#else //In 32 bit windows and 32/64 bit unixes sizeof(size_t) == sizeof(unsigned long)
#define BOOST_INTRUSIVE_PRIME_C(NUMBER) NUMBER##UL
#define BOOST_INTRUSIVE_64_BIT_SIZE_T (((((ULONG_MAX>>16)>>16)>>16)>>15) != 0)
#endif
template<int Dummy>
const std::size_t prime_list_holder<Dummy>::prime_list[] = {
BOOST_INTRUSIVE_PRIME_C(3), BOOST_INTRUSIVE_PRIME_C(7),
BOOST_INTRUSIVE_PRIME_C(11), BOOST_INTRUSIVE_PRIME_C(17),
BOOST_INTRUSIVE_PRIME_C(29), BOOST_INTRUSIVE_PRIME_C(53),
BOOST_INTRUSIVE_PRIME_C(97), BOOST_INTRUSIVE_PRIME_C(193),
BOOST_INTRUSIVE_PRIME_C(389), BOOST_INTRUSIVE_PRIME_C(769),
BOOST_INTRUSIVE_PRIME_C(1543), BOOST_INTRUSIVE_PRIME_C(3079),
BOOST_INTRUSIVE_PRIME_C(6151), BOOST_INTRUSIVE_PRIME_C(12289),
BOOST_INTRUSIVE_PRIME_C(24593), BOOST_INTRUSIVE_PRIME_C(49157),
BOOST_INTRUSIVE_PRIME_C(98317), BOOST_INTRUSIVE_PRIME_C(196613),
BOOST_INTRUSIVE_PRIME_C(393241), BOOST_INTRUSIVE_PRIME_C(786433),
BOOST_INTRUSIVE_PRIME_C(1572869), BOOST_INTRUSIVE_PRIME_C(3145739),
BOOST_INTRUSIVE_PRIME_C(6291469), BOOST_INTRUSIVE_PRIME_C(12582917),
BOOST_INTRUSIVE_PRIME_C(25165843), BOOST_INTRUSIVE_PRIME_C(50331653),
BOOST_INTRUSIVE_PRIME_C(100663319), BOOST_INTRUSIVE_PRIME_C(201326611),
BOOST_INTRUSIVE_PRIME_C(402653189), BOOST_INTRUSIVE_PRIME_C(805306457),
BOOST_INTRUSIVE_PRIME_C(1610612741), BOOST_INTRUSIVE_PRIME_C(3221225473),
#if BOOST_INTRUSIVE_64_BIT_SIZE_T
//Taken from Boost.MultiIndex code, thanks to Joaquin M Lopez Munoz.
BOOST_INTRUSIVE_PRIME_C(6442450939), BOOST_INTRUSIVE_PRIME_C(12884901893),
BOOST_INTRUSIVE_PRIME_C(25769803751), BOOST_INTRUSIVE_PRIME_C(51539607551),
BOOST_INTRUSIVE_PRIME_C(103079215111), BOOST_INTRUSIVE_PRIME_C(206158430209),
BOOST_INTRUSIVE_PRIME_C(412316860441), BOOST_INTRUSIVE_PRIME_C(824633720831),
BOOST_INTRUSIVE_PRIME_C(1649267441651), BOOST_INTRUSIVE_PRIME_C(3298534883309),
BOOST_INTRUSIVE_PRIME_C(6597069766657), BOOST_INTRUSIVE_PRIME_C(13194139533299),
BOOST_INTRUSIVE_PRIME_C(26388279066623), BOOST_INTRUSIVE_PRIME_C(52776558133303),
BOOST_INTRUSIVE_PRIME_C(105553116266489), BOOST_INTRUSIVE_PRIME_C(211106232532969),
BOOST_INTRUSIVE_PRIME_C(422212465066001), BOOST_INTRUSIVE_PRIME_C(844424930131963),
BOOST_INTRUSIVE_PRIME_C(1688849860263953), BOOST_INTRUSIVE_PRIME_C(3377699720527861),
BOOST_INTRUSIVE_PRIME_C(6755399441055731), BOOST_INTRUSIVE_PRIME_C(13510798882111483),
BOOST_INTRUSIVE_PRIME_C(27021597764222939), BOOST_INTRUSIVE_PRIME_C(54043195528445957),
BOOST_INTRUSIVE_PRIME_C(108086391056891903), BOOST_INTRUSIVE_PRIME_C(216172782113783843),
BOOST_INTRUSIVE_PRIME_C(432345564227567621), BOOST_INTRUSIVE_PRIME_C(864691128455135207),
BOOST_INTRUSIVE_PRIME_C(1729382256910270481), BOOST_INTRUSIVE_PRIME_C(3458764513820540933),
BOOST_INTRUSIVE_PRIME_C(6917529027641081903), BOOST_INTRUSIVE_PRIME_C(13835058055282163729),
BOOST_INTRUSIVE_PRIME_C(18446744073709551557)
#else
BOOST_INTRUSIVE_PRIME_C(4294967291)
#endif
};
#undef BOOST_INTRUSIVE_PRIME_C
#undef BOOST_INTRUSIVE_64_BIT_SIZE_T
#endif //#if !defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
template<int Dummy>
const std::size_t prime_list_holder<Dummy>::prime_list_size
= sizeof(prime_list)/sizeof(std::size_t);
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_is_true
{
template<bool Add>
struct two_or_three {yes_type _[2 + Add];};
template <class U> static yes_type test(...);
template <class U> static two_or_three<U::store_hash> test (int);
static const bool value = sizeof(test<T>(0)) > sizeof(yes_type)*2;
};
template <class T>
struct optimize_multikey_is_true
{
template<bool Add>
struct two_or_three {yes_type _[2 + Add];};
template <class U> static yes_type test(...);
template <class U> static two_or_three<U::optimize_multikey> test (int);
static const bool value = sizeof(test<T>(0)) > sizeof(yes_type)*2;
};
struct insert_commit_data_impl
{
std::size_t hash;
};
template<class Node, class SlistNodePtr>
BOOST_INTRUSIVE_FORCEINLINE 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
{
// A group is reverse-linked
//
// A is "first in group"
// C is "last in group"
// __________________
// | _____ _____ |
// | | | | | | <- Group links
// ^ V ^ V ^ V
// _ _ _ _
// A|_| B|_| C|_| D|_|
//
// ^ | ^ | ^ | ^ V <- Bucket links
// _ _____| |_____| |______| |____| |
// |B| |
// ^________________________________|
//
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;
typedef circular_slist_algorithms<node_traits> node_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)
{
node_ptr nb = detail::dcast_bucket_ptr<node>(bucket_node);
node_ptr n;
while((n = node_traits::get_next(nb)) != first_in_group){
nb = group_traits::get_next(n); //go to last in group
}
return nb;
}
static void erase_from_group(const slist_node_ptr &end_ptr, const node_ptr &to_erase_ptr, detail::true_)
{
node_ptr const nxt_ptr(node_traits::get_next(to_erase_ptr));
//Check if the next node is in the group (not end node) and reverse linked to
//'to_erase_ptr'. Erase if that's the case.
if(nxt_ptr != end_ptr && to_erase_ptr == group_traits::get_next(nxt_ptr)){
group_algorithms::unlink_after(nxt_ptr);
}
}
BOOST_INTRUSIVE_FORCEINLINE static void erase_from_group(const slist_node_ptr&, const node_ptr&, detail::false_)
{}
BOOST_INTRUSIVE_FORCEINLINE static node_ptr get_last_in_group(const node_ptr &first_in_group, detail::true_)
{ return group_traits::get_next(first_in_group); }
BOOST_INTRUSIVE_FORCEINLINE static node_ptr get_last_in_group(node_ptr n, detail::false_)
{ return n; }
static node_ptr get_first_in_group(node_ptr n, detail::true_)
{
node_ptr ng;
while(n == node_traits::get_next((ng = group_traits::get_next(n)))){
n = ng;
}
return n;
}
BOOST_INTRUSIVE_FORCEINLINE static node_ptr next_group_if_first_in_group(node_ptr ptr)
{
return node_traits::get_next(group_traits::get_next(ptr));
}
BOOST_INTRUSIVE_FORCEINLINE static node_ptr get_first_in_group(const node_ptr &n, detail::false_)
{ return n; }
BOOST_INTRUSIVE_FORCEINLINE static void insert_in_group(const node_ptr &first_in_group, const node_ptr &n, true_)
{ group_algorithms::link_after(first_in_group, n); }
static void insert_in_group(const node_ptr&, const node_ptr&, false_)
{}
BOOST_INTRUSIVE_FORCEINLINE static node_ptr split_group(node_ptr const new_first_in_group)
{
node_ptr const first((get_first_in_group)(new_first_in_group, detail::true_()));
if(first != new_first_in_group){
node_ptr const last = group_traits::get_next(first);
group_traits::set_next(first, group_traits::get_next(new_first_in_group));
group_traits::set_next(new_first_in_group, last);
}
return first;
}
};
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)
{}
BOOST_INTRUSIVE_FORCEINLINE 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
{
BOOST_INTRUSIVE_FORCEINLINE static void store_hash(typename NodeTraits::node_ptr p, std::size_t h, true_)
{ return NodeTraits::set_hash(p, h); }
BOOST_INTRUSIVE_FORCEINLINE static void store_hash(typename NodeTraits::node_ptr, std::size_t, false_)
{}
};
BOOST_INTRUSIVE_FORCEINLINE std::size_t hash_to_bucket(std::size_t hash_value, std::size_t bucket_cnt, detail::false_)
{ return hash_value % bucket_cnt; }
BOOST_INTRUSIVE_FORCEINLINE 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>
BOOST_INTRUSIVE_FORCEINLINE 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)
bucket_number -= static_cast<std::size_t>(bucket_number >= split)*(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<empty>::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<empty>::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<empty>::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;
//hashtable default hook traits
struct default_hashtable_hook_applier
{ template <class T> struct apply{ typedef typename T::default_hashtable_hook type; }; };
template<>
struct is_default_hook_tag<default_hashtable_hook_applier>
{ static const bool value = true; };
struct hashtable_defaults
{
typedef default_hashtable_hook_applier proto_value_traits;
typedef std::size_t size_type;
typedef void key_of_value;
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;
BOOST_INTRUSIVE_FORCEINLINE downcast_node_to_value_t(const const_value_traits_ptr &ptr)
: base_t(ptr)
{}
BOOST_INTRUSIVE_FORCEINLINE 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
//Use public inheritance to avoid MSVC bugs with closures
: public 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>
BOOST_INTRUSIVE_FORCEINLINE node_cast_adaptor(const ConvertibleToF &c2f, const RealValuTraits *traits)
: base_t(base_t(c2f, traits))
{}
BOOST_INTRUSIVE_FORCEINLINE typename base_t::node_ptr operator()(const slist_node &to_clone)
{ return base_t::operator()(static_cast<const node &>(to_clone)); }
BOOST_INTRUSIVE_FORCEINLINE void operator()(SlistNodePtr to_clone)
{
base_t::operator()(pointer_traits<NodePtr>::pointer_to(static_cast<node &>(*to_clone)));
}
};
//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
{
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 typename value_traits::pointer pointer;
typedef typename value_traits::const_pointer const_pointer;
typedef typename pointer_traits<pointer>::reference reference;
typedef typename pointer_traits
<const_pointer>::reference const_reference;
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;
template<class BucketTraitsType>
BOOST_INTRUSIVE_FORCEINLINE bucket_plus_vtraits(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits)
: data(val_traits, ::boost::forward<BucketTraitsType>(b_traits))
{}
BOOST_INTRUSIVE_FORCEINLINE bucket_plus_vtraits & operator =(const bucket_plus_vtraits &x)
{ data.bucket_traits_ = x.data.bucket_traits_; return *this; }
BOOST_INTRUSIVE_FORCEINLINE 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
//
BOOST_INTRUSIVE_FORCEINLINE const bucket_plus_vtraits &get_bucket_value_traits() const
{ return *this; }
BOOST_INTRUSIVE_FORCEINLINE bucket_plus_vtraits &get_bucket_value_traits()
{ return *this; }
BOOST_INTRUSIVE_FORCEINLINE 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
//
BOOST_INTRUSIVE_FORCEINLINE const value_traits &priv_value_traits() const
{ return this->data; }
BOOST_INTRUSIVE_FORCEINLINE value_traits &priv_value_traits()
{ return this->data; }
//bucket_traits
//
BOOST_INTRUSIVE_FORCEINLINE const bucket_traits &priv_bucket_traits() const
{ return this->data.bucket_traits_; }
BOOST_INTRUSIVE_FORCEINLINE bucket_traits &priv_bucket_traits()
{ return this->data.bucket_traits_; }
//bucket operations
BOOST_INTRUSIVE_FORCEINLINE 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(); }
BOOST_INTRUSIVE_FORCEINLINE bucket_ptr priv_invalid_bucket() const
{
const bucket_traits &rbt = this->priv_bucket_traits();
return rbt.bucket_begin() + rbt.bucket_count();
}
BOOST_INTRUSIVE_FORCEINLINE siterator priv_invalid_local_it() const
{ return this->priv_bucket_traits().bucket_begin()->before_begin(); }
template<class NodeDisposer>
static size_type priv_erase_from_single_bucket(bucket_type &b, siterator sbefore_first, siterator slast, NodeDisposer node_disposer, detail::true_) //optimize multikey
{
size_type n = 0;
siterator const sfirst(++siterator(sbefore_first));
if(sfirst != slast){
node_ptr const nf = detail::dcast_bucket_ptr<node>(sfirst.pointed_node());
node_ptr const nl = detail::dcast_bucket_ptr<node>(slast.pointed_node());
node_ptr const ne = detail::dcast_bucket_ptr<node>(b.end().pointed_node());
if(group_functions_t::next_group_if_first_in_group(nf) != nf) {
// The node is at the beginning of a group.
if(nl != ne){
group_functions_t::split_group(nl);
}
}
else {
node_ptr const group1 = group_functions_t::split_group(nf);
if(nl != ne) {
node_ptr const group2 = group_functions_t::split_group(ne);
if(nf == group2) { //Both first and last in the same group
//so join group1 and group2
node_ptr const end1 = group_traits::get_next(group1);
node_ptr const end2 = group_traits::get_next(group2);
group_traits::set_next(group1, end2);
group_traits::set_next(group2, end1);
}
}
}
siterator it(++siterator(sbefore_first));
while(it != slast){
node_disposer((it++).pointed_node());
++n;
}
b.erase_after(sbefore_first, slast);
}
return n;
}
template<class NodeDisposer>
static size_type priv_erase_from_single_bucket(bucket_type &b, siterator sbefore_first, siterator slast, NodeDisposer node_disposer, detail::false_) //optimize multikey
{
size_type n = 0;
siterator it(++siterator(sbefore_first));
while(it != slast){
node_disposer((it++).pointed_node());
++n;
}
b.erase_after(sbefore_first, slast);
return n;
}
template<class NodeDisposer>
static void priv_erase_node(bucket_type &b, siterator i, NodeDisposer node_disposer, detail::true_) //optimize multikey
{
node_ptr const ne(detail::dcast_bucket_ptr<node>(b.end().pointed_node()));
node_ptr n(detail::dcast_bucket_ptr<node>(i.pointed_node()));
node_ptr pos = node_traits::get_next(group_traits::get_next(n));
node_ptr bn;
node_ptr nn(node_traits::get_next(n));
if(pos != n) {
//Node is the first of the group
bn = group_functions_t::get_prev_to_first_in_group(ne, n);
//Unlink the rest of the group if it's not the last node of its group
if(nn != ne && group_traits::get_next(nn) == n){
group_algorithms::unlink_after(nn);
}
}
else if(nn != ne && group_traits::get_next(nn) == n){
//Node is not the end of the group
bn = group_traits::get_next(n);
group_algorithms::unlink_after(nn);
}
else{
//Node is the end of the group
bn = group_traits::get_next(n);
node_ptr const x(group_algorithms::get_previous_node(n));
group_algorithms::unlink_after(x);
}
b.erase_after_and_dispose(bucket_type::s_iterator_to(*bn), node_disposer);
}
template<class NodeDisposer>
BOOST_INTRUSIVE_FORCEINLINE static void priv_erase_node(bucket_type &b, siterator i, NodeDisposer node_disposer, detail::false_) //optimize multikey
{ b.erase_after_and_dispose(b.previous(i), node_disposer); }
template<class NodeDisposer, bool OptimizeMultikey>
size_type priv_erase_node_range( siterator const &before_first_it, size_type const first_bucket
, siterator const &last_it, size_type const last_bucket
, NodeDisposer node_disposer, detail::bool_<OptimizeMultikey> optimize_multikey_tag)
{
size_type num_erased(0);
siterator last_step_before_it;
if(first_bucket != last_bucket){
bucket_type *b = (&this->priv_bucket_pointer()[0]);
num_erased += this->priv_erase_from_single_bucket
(b[first_bucket], before_first_it, b[first_bucket].end(), node_disposer, optimize_multikey_tag);
for(size_type i = 0, n = (last_bucket - first_bucket - 1); i != n; ++i){
num_erased += this->priv_erase_whole_bucket(b[first_bucket+i+1], node_disposer);
}
last_step_before_it = b[last_bucket].before_begin();
}
else{
last_step_before_it = before_first_it;
}
num_erased += this->priv_erase_from_single_bucket
(this->priv_bucket_pointer()[last_bucket], last_step_before_it, last_it, node_disposer, optimize_multikey_tag);
return num_erased;
}
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);
}
template<class NodeDisposer>
size_type priv_erase_whole_bucket(bucket_type &b, NodeDisposer node_disposer)
{
size_type num_erased = 0;
siterator b_begin(b.before_begin());
siterator nxt(b_begin);
++nxt;
siterator const end_sit(b.end());
while(nxt != end_sit){
//No need to init group links as we'll delete all bucket nodes
nxt = bucket_type::s_erase_after_and_dispose(b_begin, node_disposer);
++num_erased;
}
return num_erased;
}
BOOST_INTRUSIVE_FORCEINLINE 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 const elem(detail::dcast_bucket_ptr<node>(i.pointed_node()));
node_ptr const prev_in_group(group_traits::get_next(elem));
bool const 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);
}
BOOST_INTRUSIVE_FORCEINLINE static siterator priv_get_previous(bucket_type &b, siterator i, detail::false_) //NOT optimize multikey
{ return b.previous(i); }
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);
}
BOOST_INTRUSIVE_FORCEINLINE 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)); }
BOOST_INTRUSIVE_FORCEINLINE static std::size_t priv_stored_hash(slist_node_ptr, detail::false_) //NO store_hash
{ return std::size_t(-1); }
BOOST_INTRUSIVE_FORCEINLINE node &priv_value_to_node(reference v)
{ return *this->priv_value_traits().to_node_ptr(v); }
BOOST_INTRUSIVE_FORCEINLINE const node &priv_value_to_node(const_reference v) const
{ return *this->priv_value_traits().to_node_ptr(v); }
BOOST_INTRUSIVE_FORCEINLINE reference priv_value_from_slist_node(slist_node_ptr n)
{ return *this->priv_value_traits().to_value_ptr(detail::dcast_bucket_ptr<node>(n)); }
BOOST_INTRUSIVE_FORCEINLINE const_reference 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){
buckets_it->clear_and_dispose(detail::init_disposer<node_algorithms>());
}
else{
buckets_it->clear();
}
}
}
BOOST_INTRUSIVE_FORCEINLINE 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->priv_value_traits().to_node_ptr(v)); }
typedef hashtable_iterator<bucket_plus_vtraits, false> iterator;
typedef hashtable_iterator<bucket_plus_vtraits, true> const_iterator;
BOOST_INTRUSIVE_FORCEINLINE iterator end()
{ return iterator(this->priv_invalid_local_it(), 0); }
BOOST_INTRUSIVE_FORCEINLINE const_iterator end() const
{ return this->cend(); }
BOOST_INTRUSIVE_FORCEINLINE const_iterator cend() const
{ return const_iterator(this->priv_invalid_local_it(), 0); }
static size_type suggested_upper_bucket_count(size_type n)
{
const std::size_t *primes = &prime_list_holder<0>::prime_list[0];
const std::size_t *primes_end = primes + 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);
}
static size_type suggested_lower_bucket_count(size_type n)
{
const std::size_t *primes = &prime_list_holder<0>::prime_list[0];
const std::size_t *primes_end = primes + 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);
}
//Public functions:
struct data_type : public ValueTraits
{
template<class BucketTraitsType>
BOOST_INTRUSIVE_FORCEINLINE data_type(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits)
: ValueTraits(val_traits), bucket_traits_(::boost::forward<BucketTraitsType>(b_traits))
{}
bucket_traits bucket_traits_;
} data;
};
template<class Hash, class>
struct get_hash
{
typedef Hash type;
};
template<class T>
struct get_hash<void, T>
{
typedef ::boost::hash<T> type;
};
template<class EqualTo, class>
struct get_equal_to
{
typedef EqualTo type;
};
template<class T>
struct get_equal_to<void, T>
{
typedef std::equal_to<T> type;
};
template<class KeyOfValue, class T>
struct get_hash_key_of_value
{
typedef KeyOfValue type;
};
template<class T>
struct get_hash_key_of_value<void, T>
{
typedef ::boost::intrusive::detail::identity<T> type;
};
template<class T, class VoidOrKeyOfValue>
struct hash_key_types_base
{
typedef typename get_hash_key_of_value
< VoidOrKeyOfValue, T>::type key_of_value;
typedef typename key_of_value::type key_type;
};
template<class T, class VoidOrKeyOfValue, class VoidOrKeyHash>
struct hash_key_hash
: get_hash
< VoidOrKeyHash
, typename hash_key_types_base<T, VoidOrKeyOfValue>::key_type
>
{};
template<class T, class VoidOrKeyOfValue, class VoidOrKeyEqual>
struct hash_key_equal
: get_equal_to
< VoidOrKeyEqual
, typename hash_key_types_base<T, VoidOrKeyOfValue>::key_type
>
{};
//bucket_hash_t
//Stores bucket_plus_vtraits plust the hash function
template<class ValueTraits, class VoidOrKeyOfValue, class VoidOrKeyHash, class BucketTraits>
struct bucket_hash_t
//Use public inheritance to avoid MSVC bugs with closures
: public detail::ebo_functor_holder
<typename hash_key_hash < typename bucket_plus_vtraits<ValueTraits,BucketTraits>::value_traits::value_type
, VoidOrKeyOfValue
, VoidOrKeyHash
>::type
>
, bucket_plus_vtraits<ValueTraits, BucketTraits> //4
{
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 hash_key_hash
< value_type, VoidOrKeyOfValue, VoidOrKeyHash> hash_key_hash_t;
typedef typename hash_key_hash_t::type hasher;
typedef typename hash_key_types_base<value_type, VoidOrKeyOfValue>::key_of_value key_of_value;
typedef BucketTraits bucket_traits;
typedef bucket_plus_vtraits<ValueTraits, BucketTraits> bucket_plus_vtraits_t;
typedef detail::ebo_functor_holder<hasher> base_t;
template<class BucketTraitsType>
BOOST_INTRUSIVE_FORCEINLINE bucket_hash_t(const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits, const hasher & h)
: detail::ebo_functor_holder<hasher>(h), bucket_plus_vtraits_t(val_traits, ::boost::forward<BucketTraitsType>(b_traits))
{}
BOOST_INTRUSIVE_FORCEINLINE const hasher &priv_hasher() const
{ return this->base_t::get(); }
hasher &priv_hasher()
{ return this->base_t::get(); }
using bucket_plus_vtraits_t::priv_stored_or_compute_hash; //For store_hash == true
BOOST_INTRUSIVE_FORCEINLINE std::size_t priv_stored_or_compute_hash(const value_type &v, detail::false_) const //For store_hash == false
{ return this->priv_hasher()(key_of_value()(v)); }
};
template<class ValueTraits, class BucketTraits, class VoidOrKeyOfValue, class VoidOrKeyEqual>
struct hashtable_equal_holder
{
typedef detail::ebo_functor_holder
< typename hash_key_equal < typename bucket_plus_vtraits<ValueTraits, BucketTraits>::value_traits::value_type
, VoidOrKeyOfValue
, VoidOrKeyEqual
>::type
> type;
};
//bucket_hash_equal_t
//Stores bucket_hash_t and the equality function when the first
//non-empty bucket shall not be cached.
template<class ValueTraits, class VoidOrKeyOfValue, class VoidOrKeyHash, class VoidOrKeyEqual, class BucketTraits, bool>
struct bucket_hash_equal_t
//Use public inheritance to avoid MSVC bugs with closures
: public bucket_hash_t<ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, BucketTraits> //3
, public hashtable_equal_holder<ValueTraits, BucketTraits, VoidOrKeyOfValue, VoidOrKeyEqual>::type //equal
{
typedef typename hashtable_equal_holder
<ValueTraits, BucketTraits, VoidOrKeyOfValue, VoidOrKeyEqual>::type equal_holder_t;
typedef bucket_hash_t<ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, BucketTraits> bucket_hash_type;
typedef bucket_plus_vtraits<ValueTraits,BucketTraits> bucket_plus_vtraits_t;
typedef ValueTraits value_traits;
typedef typename equal_holder_t::functor_type key_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 key_equal &e)
: bucket_hash_type(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h)
, equal_holder_t(e)
{}
BOOST_INTRUSIVE_FORCEINLINE bucket_ptr priv_get_cache()
{ return this->bucket_hash_type::priv_bucket_pointer(); }
BOOST_INTRUSIVE_FORCEINLINE void priv_set_cache(const bucket_ptr &)
{}
BOOST_INTRUSIVE_FORCEINLINE size_type priv_get_cache_bucket_num()
{ return 0u; }
BOOST_INTRUSIVE_FORCEINLINE void priv_initialize_cache()
{}
BOOST_INTRUSIVE_FORCEINLINE void priv_swap_cache(bucket_hash_equal_t &)
{}
siterator priv_begin() const
{
size_type n = 0;
size_type bucket_cnt = this->bucket_hash_type::priv_bucket_count();
for (n = 0; n < bucket_cnt; ++n){
bucket_type &b = this->bucket_hash_type::priv_bucket_pointer()[n];
if(!b.empty()){
return b.begin();
}
}
return this->bucket_hash_type::priv_invalid_local_it();
}
BOOST_INTRUSIVE_FORCEINLINE void priv_insertion_update_cache(size_type)
{}
BOOST_INTRUSIVE_FORCEINLINE void priv_erasure_update_cache_range(size_type, size_type)
{}
BOOST_INTRUSIVE_FORCEINLINE void priv_erasure_update_cache()
{}
BOOST_INTRUSIVE_FORCEINLINE const key_equal &priv_equal() const
{ return this->equal_holder_t::get(); }
BOOST_INTRUSIVE_FORCEINLINE key_equal &priv_equal()
{ return this->equal_holder_t::get(); }
};
//bucket_hash_equal_t
//Stores bucket_hash_t and the equality function when the first
//non-empty bucket shall be cached.
template<class ValueTraits, class VoidOrKeyOfValue, class VoidOrKeyHash, class VoidOrKeyEqual, class BucketTraits> //cache_begin == true version
struct bucket_hash_equal_t<ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, VoidOrKeyEqual, BucketTraits, true>
//Use public inheritance to avoid MSVC bugs with closures
: bucket_hash_t<ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, BucketTraits> //2
, hashtable_equal_holder<ValueTraits, BucketTraits, VoidOrKeyOfValue, VoidOrKeyEqual>::type
{
typedef typename hashtable_equal_holder
<ValueTraits, BucketTraits, VoidOrKeyOfValue, VoidOrKeyEqual>::type equal_holder_t;
typedef bucket_plus_vtraits<ValueTraits,BucketTraits> bucket_plus_vtraits_t;
typedef ValueTraits value_traits;
typedef typename equal_holder_t::functor_type key_equal;
typedef bucket_hash_t<ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, BucketTraits> bucket_hash_type;
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 key_equal &e)
: bucket_hash_type(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h)
, equal_holder_t(e)
{}
typedef typename detail::unordered_bucket_ptr_impl
<typename bucket_hash_type::value_traits>::type bucket_ptr;
BOOST_INTRUSIVE_FORCEINLINE bucket_ptr &priv_get_cache()
{ return cached_begin_; }
BOOST_INTRUSIVE_FORCEINLINE const bucket_ptr &priv_get_cache() const
{ return cached_begin_; }
BOOST_INTRUSIVE_FORCEINLINE void priv_set_cache(const bucket_ptr &p)
{ cached_begin_ = p; }
BOOST_INTRUSIVE_FORCEINLINE std::size_t priv_get_cache_bucket_num()
{ return this->cached_begin_ - this->bucket_hash_type::priv_bucket_pointer(); }
BOOST_INTRUSIVE_FORCEINLINE void priv_initialize_cache()
{ this->cached_begin_ = this->bucket_hash_type::priv_invalid_bucket(); }
BOOST_INTRUSIVE_FORCEINLINE void priv_swap_cache(bucket_hash_equal_t &other)
{
::boost::adl_move_swap(this->cached_begin_, other.cached_begin_);
}
siterator priv_begin() const
{
if(this->cached_begin_ == this->bucket_hash_type::priv_invalid_bucket()){
return this->bucket_hash_type::priv_invalid_local_it();
}
else{
return this->cached_begin_->begin();
}
}
void priv_insertion_update_cache(size_type insertion_bucket)
{
bucket_ptr p = this->bucket_hash_type::priv_bucket_pointer() + insertion_bucket;
if(p < this->cached_begin_){
this->cached_begin_ = p;
}
}
BOOST_INTRUSIVE_FORCEINLINE const key_equal &priv_equal() const
{ return this->equal_holder_t::get(); }
BOOST_INTRUSIVE_FORCEINLINE key_equal &priv_equal()
{ return this->equal_holder_t::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->bucket_hash_type::priv_bucket_pointer()[first_bucket_num].empty() ){
this->priv_set_cache(this->bucket_hash_type::priv_bucket_pointer() + last_bucket_num);
this->priv_erasure_update_cache();
}
}
void priv_erasure_update_cache()
{
if(this->cached_begin_ != this->bucket_hash_type::priv_invalid_bucket()){
size_type current_n = this->priv_get_cache() - this->bucket_hash_type::priv_bucket_pointer();
for( const size_type num_buckets = this->bucket_hash_type::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_;
};
//This wrapper around size_traits is used
//to maintain minimal container size with compilers like MSVC
//that have problems with EBO and multiple empty base classes
template<class DeriveFrom, class SizeType, bool>
struct hashtable_size_traits_wrapper
: public DeriveFrom
{
template<class Base, class Arg0, class Arg1, class Arg2>
hashtable_size_traits_wrapper( BOOST_FWD_REF(Base) base, BOOST_FWD_REF(Arg0) arg0
, BOOST_FWD_REF(Arg1) arg1, BOOST_FWD_REF(Arg2) arg2)
: DeriveFrom(::boost::forward<Base>(base)
, ::boost::forward<Arg0>(arg0)
, ::boost::forward<Arg1>(arg1)
, ::boost::forward<Arg2>(arg2))
{}
typedef detail::size_holder < true, SizeType> size_traits;//size_traits
size_traits size_traits_;
typedef const size_traits & size_traits_const_t;
typedef size_traits & size_traits_t;
BOOST_INTRUSIVE_FORCEINLINE size_traits_const_t priv_size_traits() const
{ return size_traits_; }
BOOST_INTRUSIVE_FORCEINLINE size_traits_t priv_size_traits()
{ return size_traits_; }
};
template<class DeriveFrom, class SizeType>
struct hashtable_size_traits_wrapper<DeriveFrom, SizeType, false>
: public DeriveFrom
{
template<class Base, class Arg0, class Arg1, class Arg2>
hashtable_size_traits_wrapper( BOOST_FWD_REF(Base) base, BOOST_FWD_REF(Arg0) arg0
, BOOST_FWD_REF(Arg1) arg1, BOOST_FWD_REF(Arg2) arg2)
: DeriveFrom(::boost::forward<Base>(base)
, ::boost::forward<Arg0>(arg0)
, ::boost::forward<Arg1>(arg1)
, ::boost::forward<Arg2>(arg2))
{}
typedef detail::size_holder< false, SizeType> size_traits;
typedef size_traits size_traits_const_t;
typedef size_traits size_traits_t;
BOOST_INTRUSIVE_FORCEINLINE size_traits priv_size_traits() const
{ return size_traits(); }
};
//hashdata_internal
//Stores bucket_hash_equal_t and split_traits
template<class ValueTraits, class VoidOrKeyOfValue, class VoidOrKeyHash, class VoidOrKeyEqual, class BucketTraits, class SizeType, std::size_t BoolFlags>
struct hashdata_internal
: public hashtable_size_traits_wrapper
< bucket_hash_equal_t
< ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, VoidOrKeyEqual
, BucketTraits
, 0 != (BoolFlags & hash_bool_flags::cache_begin_pos)
> //2
, SizeType
, (BoolFlags & hash_bool_flags::incremental_pos) != 0
>
{
typedef hashtable_size_traits_wrapper
< bucket_hash_equal_t
< ValueTraits, VoidOrKeyOfValue, VoidOrKeyHash, VoidOrKeyEqual
, BucketTraits
, 0 != (BoolFlags & hash_bool_flags::cache_begin_pos)
> //2
, SizeType
, (BoolFlags & hash_bool_flags::incremental_pos) != 0
> internal_type;
typedef typename internal_type::key_equal key_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 internal_type::size_traits split_traits;
typedef typename bucket_plus_vtraits_t::bucket_ptr bucket_ptr;
typedef typename bucket_plus_vtraits_t::const_value_traits_ptr const_value_traits_ptr;
typedef typename bucket_plus_vtraits_t::siterator siterator;
typedef typename bucket_plus_vtraits_t::bucket_traits bucket_traits;
typedef typename bucket_plus_vtraits_t::value_traits value_traits;
typedef typename bucket_plus_vtraits_t::bucket_type bucket_type;
typedef typename value_traits::value_type value_type;
typedef typename value_traits::pointer pointer;
typedef typename value_traits::const_pointer const_pointer;
typedef typename pointer_traits<pointer>::reference reference;
typedef typename pointer_traits
<const_pointer>::reference const_reference;
typedef typename value_traits::node_traits node_traits;
typedef typename node_traits::node node;
typedef typename node_traits::node_ptr node_ptr;
typedef typename node_traits::const_node_ptr const_node_ptr;
typedef detail::node_functions<node_traits> node_functions_t;
typedef typename detail::get_slist_impl
<typename detail::reduced_slist_node_traits
<typename value_traits::node_traits>::type
>::type slist_impl;
typedef typename slist_impl::node_algorithms node_algorithms;
typedef typename slist_impl::node_ptr slist_node_ptr;
typedef hash_key_types_base
< typename ValueTraits::value_type
, VoidOrKeyOfValue
> hash_types_base;
typedef typename hash_types_base::key_of_value key_of_value;
static const bool store_hash = detail::store_hash_is_true<node_traits>::value;
static const bool safemode_or_autounlink = is_safe_autounlink<value_traits::link_mode>::value;
static const bool stateful_value_traits = detail::is_stateful_value_traits<value_traits>::value;
typedef detail::bool_<store_hash> store_hash_t;
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;
//
template<class BucketTraitsType>
hashdata_internal( const ValueTraits &val_traits, BOOST_FWD_REF(BucketTraitsType) b_traits
, const hasher & h, const key_equal &e)
: internal_type(val_traits, ::boost::forward<BucketTraitsType>(b_traits), h, e)
{}
BOOST_INTRUSIVE_FORCEINLINE typename internal_type::size_traits_t priv_split_traits()
{ return this->priv_size_traits(); }
BOOST_INTRUSIVE_FORCEINLINE typename internal_type::size_traits_const_t priv_split_traits() const
{ return this->priv_size_traits(); }
~hashdata_internal()
{ this->priv_clear_buckets(); }
void priv_clear_buckets()
{
this->internal_type::priv_clear_buckets
( this->priv_get_cache()
, this->internal_type::priv_bucket_count()
- (this->priv_get_cache()
- this->internal_type::priv_bucket_pointer()));
}
void priv_clear_buckets_and_cache()
{
this->priv_clear_buckets();
this->priv_initialize_cache();
}
void priv_initialize_buckets_and_cache()
{
this->internal_type::priv_clear_buckets
( this->internal_type::priv_bucket_pointer()
, this->internal_type::priv_bucket_count());
this->priv_initialize_cache();
}
typedef hashtable_iterator<bucket_plus_vtraits_t, false> iterator;
typedef hashtable_iterator<bucket_plus_vtraits_t, true> const_iterator;
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); }
//public functions
BOOST_INTRUSIVE_FORCEINLINE SizeType split_count() const
{
return this->priv_split_traits().get_size();
}
BOOST_INTRUSIVE_FORCEINLINE iterator iterator_to(reference value)
{
return iterator(bucket_type::s_iterator_to
(this->priv_value_to_node(value)), &this->get_bucket_value_traits());
}
const_iterator iterator_to(const_reference value) const
{
siterator const sit = bucket_type::s_iterator_to
( *pointer_traits<node_ptr>::const_cast_from
(pointer_traits<const_node_ptr>::pointer_to(this->priv_value_to_node(value)))
);
return const_iterator(sit, &this->get_bucket_value_traits());
}
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());
}
static const_local_iterator s_local_iterator_to(const_reference value)
{
BOOST_STATIC_ASSERT((!stateful_value_traits));
siterator const sit = bucket_type::s_iterator_to
( *pointer_traits<node_ptr>::const_cast_from
(value_traits::to_node_ptr(value))
);
return const_local_iterator(sit, const_value_traits_ptr());
}
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());
}
const_local_iterator local_iterator_to(const_reference value) const
{
siterator sit = bucket_type::s_iterator_to
( *pointer_traits<node_ptr>::const_cast_from
(pointer_traits<const_node_ptr>::pointer_to(this->priv_value_to_node(value)))
);
return const_local_iterator(sit, this->priv_value_traits_ptr());
}
BOOST_INTRUSIVE_FORCEINLINE size_type bucket_count() const
{ return this->priv_bucket_count(); }
BOOST_INTRUSIVE_FORCEINLINE size_type bucket_size(size_type n) const
{ return this->priv_bucket_pointer()[n].size(); }
BOOST_INTRUSIVE_FORCEINLINE bucket_ptr bucket_pointer() const
{ return this->priv_bucket_pointer(); }
BOOST_INTRUSIVE_FORCEINLINE local_iterator begin(size_type n)
{ return local_iterator(this->priv_bucket_pointer()[n].begin(), this->priv_value_traits_ptr()); }
BOOST_INTRUSIVE_FORCEINLINE const_local_iterator begin(size_type n) const
{ return this->cbegin(n); }
const_local_iterator cbegin(size_type n) const
{
return const_local_iterator
( pointer_traits<bucket_ptr>::const_cast_from(this->priv_bucket_pointer())[n].begin()
, this->priv_value_traits_ptr());
}
using internal_type::end;
using internal_type::cend;
local_iterator end(size_type n)
{ return local_iterator(this->priv_bucket_pointer()[n].end(), this->priv_value_traits_ptr()); }
BOOST_INTRUSIVE_FORCEINLINE const_local_iterator end(size_type n) const
{ return this->cend(n); }
const_local_iterator cend(size_type n) const
{
return const_local_iterator
( pointer_traits<bucket_ptr>::const_cast_from(this->priv_bucket_pointer())[n].end()
, this->priv_value_traits_ptr());
}
//Public functions for hashtable_impl
BOOST_INTRUSIVE_FORCEINLINE iterator begin()
{ return iterator(this->priv_begin(), &this->get_bucket_value_traits()); }
BOOST_INTRUSIVE_FORCEINLINE const_iterator begin() const
{ return this->cbegin(); }
BOOST_INTRUSIVE_FORCEINLINE const_iterator cbegin() const
{ return const_iterator(this->priv_begin(), &this->get_bucket_value_traits()); }
BOOST_INTRUSIVE_FORCEINLINE hasher hash_function() const
{ return this->priv_hasher(); }
BOOST_INTRUSIVE_FORCEINLINE key_equal key_eq() const
{ return this->priv_equal(); }
};
/// @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 VoidOrKeyOfValue, class VoidOrKeyHash, class VoidOrKeyEqual, class BucketTraits, class SizeType, std::size_t BoolFlags>
#endif
class hashtable_impl
: private hashtable_size_traits_wrapper
< hashdata_internal
< ValueTraits
, VoidOrKeyOfValue, VoidOrKeyHash, VoidOrKeyEqual
, BucketTraits, SizeType
, BoolFlags & (hash_bool_flags::incremental_pos | hash_bool_flags::cache_begin_pos) //1
>
, SizeType
, (BoolFlags & hash_bool_flags::constant_time_size_pos) != 0
>
{
typedef hashtable_size_traits_wrapper
< hashdata_internal
< ValueTraits
, VoidOrKeyOfValue, VoidOrKeyHash, VoidOrKeyEqual
, BucketTraits, SizeType
, BoolFlags & (hash_bool_flags::incremental_pos | hash_bool_flags::cache_begin_pos) //1
>
, SizeType
, (BoolFlags & hash_bool_flags::constant_time_size_pos) != 0
> internal_type;
typedef typename internal_type::size_traits size_traits;
typedef hash_key_types_base
< typename ValueTraits::value_type
, VoidOrKeyOfValue
> hash_types_base;
public:
typedef ValueTraits value_traits;
/// @cond
typedef BucketTraits bucket_traits;
typedef typename internal_type::slist_impl 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;
using internal_type::begin;
using internal_type::cbegin;
using internal_type::end;
using internal_type::cend;
using internal_type::hash_function;
using internal_type::key_eq;
using internal_type::bucket_size;
using internal_type::bucket_count;
using internal_type::local_iterator_to;
using internal_type::s_local_iterator_to;
using internal_type::iterator_to;
using internal_type::bucket_pointer;
using internal_type::suggested_upper_bucket_count;
using internal_type::suggested_lower_bucket_count;
using internal_type::split_count;
/// @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 hash_types_base::key_type key_type;
typedef typename hash_types_base::key_of_value key_of_value;
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 typename internal_type::key_equal key_equal;
typedef typename internal_type::hasher hasher;
typedef detail::bucket_impl<slist_impl> bucket_type;
typedef typename internal_type::bucket_ptr bucket_ptr;
typedef typename slist_impl::iterator siterator;
typedef typename slist_impl::const_iterator const_siterator;
typedef typename internal_type::iterator iterator;
typedef typename internal_type::const_iterator const_iterator;
typedef typename internal_type::local_iterator local_iterator;
typedef typename internal_type::const_local_iterator const_local_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 = internal_type::stateful_value_traits;
static const bool store_hash = internal_type::store_hash;
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
static const bool is_multikey = !unique_keys;
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 typename internal_type::store_hash_t 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 typename internal_type::split_traits 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 = internal_type::safemode_or_autounlink;
//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>
struct typeof_node_disposer
{
typedef node_cast_adaptor
< detail::node_disposer< Disposer, value_traits, CircularSListAlgorithms>
, slist_node_ptr, node_ptr > type;
};
template<class Disposer>
typename typeof_node_disposer<Disposer>::type
make_node_disposer(const Disposer &disposer) const
{
typedef typename typeof_node_disposer<Disposer>::type return_t;
return return_t(disposer, &this->priv_value_traits());
}
/// @endcond
public:
typedef detail::insert_commit_data_impl insert_commit_data;
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())
: internal_type(v_traits, b_traits, hash_func, equal_func)
{
this->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>Requires</b>: buckets must not be being used by any other resource
//! and dereferencing iterator must yield an lvalue of type value_type.
//!
//! <b>Effects</b>: Constructs an empty container and inserts elements from
//! [b, e).
//!
//! <b>Complexity</b>: If N is distance(b, e): Average case is O(N)
//! (with a good hash function and with buckets_len >= N),worst case O(N^2).
//!
//! <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 hasher or key_equal throws.
//!
//! <b>Notes</b>: buckets array must be disposed only after
//! *this is disposed.
template<class Iterator>
hashtable_impl ( bool unique, Iterator b, Iterator e
, const bucket_traits &b_traits
, const hasher & hash_func = hasher()
, const key_equal &equal_func = key_equal()
, const value_traits &v_traits = value_traits())
: internal_type(v_traits, b_traits, hash_func, equal_func)
{
this->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);
//Now insert
if(unique)
this->insert_unique(b, e);
else
this->insert_equal(b, e);
}
//! <b>Effects</b>: to-do
//!
hashtable_impl(BOOST_RV_REF(hashtable_impl) x)
: internal_type( ::boost::move(x.priv_value_traits())
, ::boost::move(x.priv_bucket_traits())
, ::boost::move(x.priv_hasher())
, ::boost::move(x.priv_equal())
)
{
this->priv_swap_cache(x);
x.priv_initialize_cache();
this->priv_size_traits().set_size(x.priv_size_traits().get_size());
x.priv_size_traits().set_size(size_type(0));
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();
//! <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();
//! <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;
//! <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;
//! <b>Effects</b>: Returns an iterator pointing to the end of the unordered_set.
//!
//! <b>Complexity</b>: Constant.
//!
//! <b>Throws</b>: Nothing.
iterator end();
//! <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;
//! <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;
//! <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;
//! <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;
#endif
//! <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)
{
//These can throw
::boost::adl_move_swap(this->priv_equal(), other.priv_equal());
::boost::adl_move_swap(this->priv_hasher(), other.priv_hasher());
//These can't throw
::boost::adl_move_swap(this->priv_bucket_traits(), other.priv_bucket_traits());
::boost::adl_move_swap(this->priv_value_traits(), other.priv_value_traits());
this->priv_swap_cache(other);
this->priv_size_traits().swap(other.priv_size_traits());
this->priv_split_traits().swap(other.priv_split_traits());
}
//! <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>
BOOST_INTRUSIVE_FORCEINLINE void clone_from(const hashtable_impl &src, Cloner cloner, Disposer disposer)
{ this->priv_clone_from(src, cloner, disposer); }
//! <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()(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>
BOOST_INTRUSIVE_FORCEINLINE void clone_from(BOOST_RV_REF(hashtable_impl) src, Cloner cloner, Disposer disposer)
{ this->priv_clone_from(static_cast<hashtable_impl&>(src), cloner, disposer); }
//! <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 const it = this->priv_find
(key_of_value()(value), this->priv_hasher(), this->priv_equal(), bucket_num, hash_value, prev);
bool const next_is_in_group = optimize_multikey && it != this->priv_invalid_local_it();
return this->priv_insert_equal_after_find(value, bucket_num, hash_value, prev, next_is_in_group);
}
//! <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 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(key_of_value()(value), commit_data);
if(ret.second){
ret.first = this->insert_unique_commit(value, commit_data);
}
return ret;
}
//! <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 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 KeyEqual>
std::pair<iterator, bool> insert_unique_check
( const KeyType &key
, KeyHasher hash_func
, KeyEqual equal_func
, insert_commit_data &commit_data)
{
size_type bucket_num;
siterator prev;
siterator const pos = this->priv_find(key, hash_func, equal_func, bucket_num, commit_data.hash, prev);
return std::pair<iterator, bool>
( iterator(pos, &this->get_bucket_value_traits())
, pos == this->priv_invalid_local_it());
}
//! <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 hasher or key_compare 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.
BOOST_INTRUSIVE_FORCEINLINE std::pair<iterator, bool> insert_unique_check
( const key_type &key, insert_commit_data &commit_data)
{ return this->insert_unique_check(key, this->priv_hasher(), this->priv_equal(), commit_data); }
//! <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 const n = pointer_traits<node_ptr>::pointer_to(this->priv_value_to_node(value));
BOOST_INTRUSIVE_SAFE_HOOK_DEFAULT_ASSERT(!safemode_or_autounlink || node_algorithms::unique(n));
node_functions_t::store_hash(n, commit_data.hash, store_hash_t());
this->priv_insertion_update_cache(bucket_num);
group_functions_t::insert_in_group(n, 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.
BOOST_INTRUSIVE_FORCEINLINE 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(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.
BOOST_INTRUSIVE_FORCEINLINE 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.
BOOST_INTRUSIVE_FORCEINLINE size_type erase(const key_type &key)
{ return this->erase(key, 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 KeyEqual>
BOOST_INTRUSIVE_FORCEINLINE size_type erase(const KeyType& key, KeyHasher hash_func, KeyEqual 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>
BOOST_INTRUSIVE_DOC1ST(void
, typename detail::disable_if_convertible<Disposer BOOST_INTRUSIVE_I const_iterator>::type)
erase_and_dispose(const_iterator i, Disposer disposer)
{
//Get the bucket number and local iterator for both iterators
siterator const first_local_it(i.slist_it());
size_type const first_bucket_num = this->priv_get_bucket_num(first_local_it);
this->priv_erase_node(this->priv_bucket_pointer()[first_bucket_num], first_local_it, make_node_disposer(disposer), optimize_multikey_t());
this->priv_size_traits().decrement();
this->priv_erasure_update_cache_range(first_bucket_num, first_bucket_num);
}
//! <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(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);
}
size_type const num_erased = this->priv_erase_node_range
( before_first_local_it, first_bucket_num, last_local_it, last_bucket_num
, make_node_disposer(disposer), optimize_multikey_t());
this->priv_size_traits().set_size(this->priv_size_traits().get_size()-num_erased);
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>
BOOST_INTRUSIVE_FORCEINLINE size_type erase_and_dispose(const key_type &key, Disposer disposer)
{ return this->erase_and_dispose(key, 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 KeyEqual, class Disposer>
size_type erase_and_dispose(const KeyType& key, KeyHasher hash_func
,KeyEqual 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 const success = it != this->priv_invalid_local_it();
size_type cnt(0);
if(success){
if(optimize_multikey){
cnt = this->priv_erase_from_single_bucket
(this->priv_bucket_pointer()[bucket_num], prev, ++(priv_last_in_group)(it), make_node_disposer(disposer), optimize_multikey_t());
}
else{
bucket_type &b = this->priv_bucket_pointer()[bucket_num];
siterator const end_sit = b.end();
do{
++cnt;
++it;
}while(it != end_sit &&
this->priv_is_value_equal_to_key
(this->priv_value_from_slist_node(it.pointed_node()), h, key, equal_func));
bucket_type::s_erase_after_and_dispose(prev, it, make_node_disposer(disposer));
}
this->priv_size_traits().set_size(this->priv_size_traits().get_size()-cnt);
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->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();
typename typeof_node_disposer<Disposer>::type d(disposer, &this->priv_value_traits());
for(; num_buckets--; ++b){
b->clear_and_dispose(d);
}
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.
BOOST_INTRUSIVE_FORCEINLINE size_type count(const key_type &key) const
{ return this->count(key, 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 KeyEqual>
size_type count(const KeyType &key, KeyHasher hash_func, KeyEqual equal_func) const
{
size_type cnt;
size_type n_bucket;
this->priv_local_equal_range(key, hash_func, equal_func, n_bucket, 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.
BOOST_INTRUSIVE_FORCEINLINE iterator find(const key_type &key)
{ return this->find(key, 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 KeyEqual>
iterator find(const KeyType &key, KeyHasher hash_func, KeyEqual equal_func)
{
size_type bucket_n;
std::size_t hash;
siterator prev;
return iterator( this->priv_find(key, hash_func, equal_func, bucket_n, hash, prev)
, &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.
BOOST_INTRUSIVE_FORCEINLINE const_iterator find(const key_type &key) const
{ return this->find(key, 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 KeyEqual>
const_iterator find
(const KeyType &key, KeyHasher hash_func, KeyEqual equal_func) const
{
size_type bucket_n;
std::size_t hash_value;
siterator prev;
return const_iterator( this->priv_find(key, hash_func, equal_func, bucket_n, hash_value, prev)
, &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.
BOOST_INTRUSIVE_FORCEINLINE std::pair<iterator,iterator> equal_range(const key_type &key)
{ return this->equal_range(key, 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 KeyEqual>
std::pair<iterator,iterator> equal_range
(const KeyType &key, KeyHasher hash_func, KeyEqual equal_func)
{
std::pair<siterator, siterator> ret =
this->priv_equal_range(key, hash_func, equal_func);
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.
BOOST_INTRUSIVE_FORCEINLINE std::pair<const_iterator, const_iterator>
equal_range(const key_type &key) const
{ return this->equal_range(key, 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 KeyEqual>
std::pair<const_iterator,const_iterator> equal_range
(const KeyType &key, KeyHasher hash_func, KeyEqual equal_func) const
{
std::pair<siterator, siterator> ret =
this->priv_equal_range(key, hash_func, equal_func);
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()));
}
#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
//! <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);
//! <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;
//! <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);
//! <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);
//! <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);
//! <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;
//! <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;
//! <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;
#endif //#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
//! <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()).
BOOST_INTRUSIVE_FORCEINLINE 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>
BOOST_INTRUSIVE_FORCEINLINE size_type bucket(const KeyType& k, KeyHasher hash_func) const
{ return this->priv_hash_to_bucket(hash_func(k)); }
#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
//! <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;
//! <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);
//! <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;
//! <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;
//! <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);
//! <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;
//! <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;
#endif //#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
//! <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>:
//! If `new_bucket_traits.bucket_begin() == this->bucket_pointer()` is false,
//! unlinks values from the old bucket and inserts then in the new one according
//! to the hash value of values.
//!
//! If `new_bucket_traits.bucket_begin() == this->bucket_pointer()` is true,
//! the implementations avoids moving values as much as possible.
//!
//! 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.
//! If false, the implementation tries to minimize calls to the hash function
//! (e.g. once for equivalent values if optimize_multikey<true> is true).
//!
//! If rehash is successful updates the internal bucket_traits with new_bucket_traits.
//!
//! <b>Complexity</b>: Average case linear in this->size(), worst case quadratic.
//!
//! <b>Throws</b>: If the hasher functor throws. Basic guarantee.
BOOST_INTRUSIVE_FORCEINLINE void rehash(const bucket_traits &new_bucket_traits)
{ this->rehash_impl(new_bucket_traits, false); }
//! <b>Note</b>: This function is used when keys from inserted elements are changed
//! (e.g. a language change when key is a string) but uniqueness and hash properties are
//! preserved so a fast full rehash recovers invariants for *this without extracting and
//! reinserting all elements again.
//!
//! <b>Requires</b>: Calls produced to the hash function should not alter the value uniqueness
//! properties of already inserted elements. If hasher(key1) == hasher(key2) was true when
//! elements were inserted, it shall be true during calls produced in the execution of this function.
//!
//! key_equal is not called inside this function so it is assumed that key_equal(value1, value2)
//! should produce the same results as before for inserted elements.
//!
//! <b>Effects</b>: Reprocesses all values hold by *this, recalculating their hash values
//! and redistributing them though the buckets.
//!
//! If store_hash option is true, this method uses the hash function and updates the stored hash value.
//!
//! <b>Complexity</b>: Average case linear in this->size(), worst case quadratic.
//!
//! <b>Throws</b>: If the hasher functor throws. Basic guarantee.
BOOST_INTRUSIVE_FORCEINLINE void full_rehash()
{ this->rehash_impl(this->priv_bucket_traits(), true); }
//! <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();
bool ret = false;
if(grow){
//Test if the split variable can be changed
if((ret = split_idx < bucket_cnt)){
const size_type bucket_to_rehash = split_idx - bucket_cnt/2;
bucket_type &old_bucket = buck_ptr[bucket_to_rehash];
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( siterator before_i(old_bucket.before_begin()), i(old_bucket.begin()), end_sit(old_bucket.end())
; i != end_sit; i = before_i, ++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 const last = (priv_last_in_group)(i);
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);
}
}
rollback.release();
this->priv_erasure_update_cache();
}
}
else if((ret = split_idx > bucket_cnt/2)){ //!grow
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 ret;
}
//! <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 const new_bucket_traits_size = new_bucket_traits.bucket_count();
size_type const cur_bucket_traits = this->priv_bucket_count();
const size_type split_idx = this->split_count();
//Test new bucket size is consistent with internal bucket size and split count
if(new_bucket_traits_size/2 == cur_bucket_traits){
if(!(split_idx >= cur_bucket_traits))
return false;
}
else if(new_bucket_traits_size == cur_bucket_traits/2){
if(!(split_idx <= new_bucket_traits_size))
return false;
}
else{
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;
}
#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
//! <b>Requires</b>: incremental<> option must be set
//!
//! <b>Effects</b>: returns the current split count
//!
//! <b>Complexity</b>: Constant
//!
//! <b>Throws</b>: Nothing
size_type split_count() const;
//! <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);
//! <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);
#endif //#if defined(BOOST_INTRUSIVE_DOXYGEN_INVOKED)
friend bool operator==(const hashtable_impl &x, const hashtable_impl &y)
{
//Taken from N3068
if(constant_time_size && x.size() != y.size()){
return false;
}
for (const_iterator ix = x.cbegin(), ex = x.cend(); ix != ex; ++ix){
std::pair<const_iterator, const_iterator> eqx(x.equal_range(key_of_value()(*ix))),
eqy(y.equal_range(key_of_value()(*ix)));
if (boost::intrusive::iterator_distance(eqx.first, eqx.second) !=
boost::intrusive::iterator_distance(eqy.first, eqy.second) ||
!(priv_algo_is_permutation)(eqx.first, eqx.second, eqy.first) ){
return false;
}
ix = eqx.second;
}
return true;
}
friend bool operator!=(const hashtable_impl &x, const hashtable_impl &y)
{ return !(x == y); }
friend bool operator<(const hashtable_impl &x, const hashtable_impl &y)
{ return ::boost::intrusive::algo_lexicographical_compare(x.begin(), x.end(), y.begin(), y.end()); }
friend bool operator>(const hashtable_impl &x, const hashtable_impl &y)
{ return y < x; }
friend bool operator<=(const hashtable_impl &x, const hashtable_impl &y)
{ return !(y < x); }
friend bool operator>=(const hashtable_impl &x, const hashtable_impl &y)
{ return !(x < y); }
/// @cond
BOOST_INTRUSIVE_FORCEINLINE void check() const {}
private:
void rehash_impl(const bucket_traits &new_bucket_traits, bool do_full_rehash)
{
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 = (!do_full_rehash) && (!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)){
new_first_bucket_num = n;
n = new_bucket_count;
}
//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;
typedef detail::exception_array_disposer<bucket_type, NodeDisposer, size_type> ArrayDisposer;
NodeDisposer node_disp;
ArrayDisposer rollback1(new_buckets[0], node_disp, new_bucket_count);
ArrayDisposer rollback2(old_buckets[0], node_disp, old_bucket_count);
//Put size in a safe value for rollback exception
size_type const 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){
for( siterator before_i(old_bucket.before_begin()), i(old_bucket.begin()), end_sit(old_bucket.end())
; i != end_sit
; i = before_i, ++i){
//First obtain hash value (and store it if do_full_rehash)
std::size_t hash_value;
if(do_full_rehash){
value_type &v = this->priv_value_from_slist_node(i.pointed_node());
hash_value = this->priv_hasher()(key_of_value()(v));
node_functions_t::store_hash(pointer_traits<node_ptr>::pointer_to(this->priv_value_to_node(v)), hash_value, store_hash_t());
}
else{
const value_type &v = this->priv_value_from_slist_node(i.pointed_node());
hash_value = this->priv_stored_or_compute_hash(v, store_hash_t());
}
//Now calculate the new bucket position
const size_type new_n = detail::hash_to_bucket_split<power_2_buckets, incremental>
(hash_value, new_bucket_count, new_bucket_count);
//Update first used bucket cache
if(cache_begin && new_n < new_first_bucket_num)
new_first_bucket_num = new_n;
//If the target bucket is new, transfer the whole group
siterator const last = (priv_last_in_group)(i);
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);
}
}
}
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];
new_b.splice_after( new_b.before_begin()
, old_bucket
, old_bucket.before_begin()
, bucket_plus_vtraits_t::priv_get_last(old_bucket, optimize_multikey_t()));
}
}
this->priv_size_traits().set_size(size_backup);
this->priv_split_traits().set_size(new_bucket_count);
if(&new_bucket_traits != &this->priv_bucket_traits()){
this->priv_bucket_traits() = new_bucket_traits;
}
this->priv_initialize_cache();
this->priv_insertion_update_cache(new_first_bucket_num);
rollback1.release();
rollback2.release();
}
template <class MaybeConstHashtableImpl, class Cloner, class Disposer>
void priv_clone_from(MaybeConstHashtableImpl &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
const bool structural_copy = (!incremental) && (src_bucket_count >= dst_bucket_count) &&
(power_2_buckets || (src_bucket_count % dst_bucket_count) == 0);
if(structural_copy){
this->priv_structural_clone_from(src, cloner, disposer);
}
else{
//Unlike previous cloning algorithm, this can throw
//if cloner, hasher or comparison functor throw
typedef typename detail::if_c< detail::is_const<MaybeConstHashtableImpl>::value
, typename MaybeConstHashtableImpl::const_iterator
, typename MaybeConstHashtableImpl::iterator
>::type clone_iterator;
clone_iterator b(src.begin()), e(src.end());
detail::exception_disposer<hashtable_impl, Disposer> rollback(*this, disposer);
for(; b != e; ++b){
//No need to check for duplicates and insert it in the first position
//as this is an unordered container. So use minimal insertion code
std::size_t const hash_to_store = this->priv_stored_or_compute_hash(*b, store_hash_t());;
size_type const bucket_number = this->priv_hash_to_bucket(hash_to_store);
typedef typename detail::if_c
<detail::is_const<MaybeConstHashtableImpl>::value, const_reference, reference>::type reference_type;
reference_type r = *b;
this->priv_clone_front_in_bucket<reference_type>(bucket_number, r, hash_to_store, cloner);
}
rollback.release();
}
}
}
template<class ValueReference, class Cloner>
void priv_clone_front_in_bucket( size_type const bucket_number
, typename detail::identity<ValueReference>::type src_ref
, std::size_t const hash_to_store, Cloner cloner)
{
//No need to check for duplicates and insert it in the first position
//as this is an unordered container. So use minimal insertion code
//std::size_t const hash_value = this->priv_stored_or_compute_hash(src_ref, store_hash_t());;
//size_type const bucket_number = this->priv_hash_to_bucket(hash_value);
bucket_type &cur_bucket = this->priv_bucket_pointer()[bucket_number];
siterator const prev(cur_bucket.before_begin());
//Just check if the cloned node is equal to the first inserted value in the new bucket
//as equal src values were contiguous and they should be already inserted in the
//destination bucket.
bool const next_is_in_group = optimize_multikey && !cur_bucket.empty() &&
this->priv_equal()( key_of_value()(src_ref)
, key_of_value()(this->priv_value_from_slist_node((++siterator(prev)).pointed_node())));
this->priv_insert_equal_after_find(*cloner(src_ref), bucket_number, hash_to_store, prev, next_is_in_group);
}
template <class MaybeConstHashtableImpl, class Cloner, class Disposer>
void priv_structural_clone_from(MaybeConstHashtableImpl &src, Cloner cloner, Disposer disposer)
{
//First clone the first ones
const size_type src_bucket_count = src.bucket_count();
const size_type dst_bucket_count = this->bucket_count();
const bucket_ptr src_buckets = src.priv_bucket_pointer();
const bucket_ptr dst_buckets = this->priv_bucket_pointer();
size_type constructed = 0;
typedef node_cast_adaptor< detail::node_disposer<Disposer, value_traits, CircularSListAlgorithms>
, slist_node_ptr, node_ptr > NodeDisposer;
NodeDisposer node_disp(disposer, &this->priv_value_traits());
detail::exception_array_disposer<bucket_type, NodeDisposer, size_type>
rollback(dst_buckets[0], node_disp, constructed);
//Now insert the remaining ones using the modulo trick
for( //"constructed" already initialized
; constructed < src_bucket_count
; ++constructed){
//Since incremental hashing can't be structurally copied, avoid hash_to_bucket_split
const std::size_t new_n = detail::hash_to_bucket(constructed, dst_bucket_count, detail::bool_<power_2_buckets>());
bucket_type &src_b = src_buckets[constructed];
for( siterator b(src_b.begin()), e(src_b.end()); b != e; ++b){
slist_node_ptr const n(b.pointed_node());
typedef typename detail::if_c
<detail::is_const<MaybeConstHashtableImpl>::value, const_reference, reference>::type reference_type;
reference_type r = this->priv_value_from_slist_node(n);
this->priv_clone_front_in_bucket<reference_type>
(new_n, r, this->priv_stored_hash(n, store_hash_t()), cloner);
}
}
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();
}
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());
}
iterator priv_insert_equal_after_find(reference value, size_type bucket_num, std::size_t hash_value, siterator prev, bool const next_is_in_group)
{
//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
BOOST_INTRUSIVE_SAFE_HOOK_DEFAULT_ASSERT(!safemode_or_autounlink || node_algorithms::unique(n));
//Shortcut to optimize_multikey cases
group_functions_t::insert_in_group
( next_is_in_group ? detail::dcast_bucket_ptr<node>((++siterator(prev)).pointed_node()) : n
, 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(bucket_type::s_insert_after(prev, *n), &this->get_bucket_value_traits());
}
template<class KeyType, class KeyHasher, class KeyEqual>
siterator priv_find //In case it is not found previt is bucket.before_begin()
( const KeyType &key, KeyHasher hash_func
, KeyEqual 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 KeyEqual>
bool priv_is_value_equal_to_key(const value_type &v, const std::size_t h, const KeyType &key, KeyEqual equal_func) const
{
(void)h;
return (!compare_hash || this->priv_stored_or_compute_hash(v, store_hash_t()) == h) && equal_func(key, key_of_value()(v));
}
//return previous iterator to the next equal range group in case
static siterator priv_last_in_group(const siterator &it_first_in_group)
{
return bucket_type::s_iterator_to
(*group_functions_t::get_last_in_group
(detail::dcast_bucket_ptr<node>(it_first_in_group.pointed_node()), optimize_multikey_t()));
}
template<class KeyType, class KeyEqual>
siterator priv_find_with_hash //In case it is not found previt is bucket.before_begin()
( const KeyType &key, KeyEqual 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();
siterator it = previt;
siterator const endit = b.end();
while(++it != endit){
if(this->priv_is_value_equal_to_key(this->priv_value_from_slist_node(it.pointed_node()), h, key, equal_func)){
return it;
}
previt = it = (priv_last_in_group)(it);
}
previt = b.before_begin();
return this->priv_invalid_local_it();
}
template<class KeyType, class KeyHasher, class KeyEqual>
std::pair<siterator, siterator> priv_local_equal_range
( const KeyType &key
, KeyHasher hash_func
, KeyEqual equal_func
, size_type &found_bucket
, size_type &cnt) const
{
cnt = 0;
//Let's see if the element is present
siterator prev;
size_type n_bucket;
std::size_t h;
std::pair<siterator, siterator> to_return
( this->priv_find(key, hash_func, equal_func, n_bucket, h, prev)
, this->priv_invalid_local_it());
if(to_return.first != to_return.second){
found_bucket = n_bucket;
//If it's present, find the first that it's not equal in
//the same bucket
bucket_type &b = this->priv_bucket_pointer()[n_bucket];
siterator it = to_return.first;
++cnt; //At least one is found
if(optimize_multikey){
to_return.second = ++(priv_last_in_group)(it);
cnt += boost::intrusive::iterator_distance(++it, to_return.second);
}
else{
siterator const bend = b.end();
while(++it != bend &&
this->priv_is_value_equal_to_key(this->priv_value_from_slist_node(it.pointed_node()), h, key, equal_func)){
++cnt;
}
to_return.second = it;
}
}
return to_return;
}
template<class KeyType, class KeyHasher, class KeyEqual>
std::pair<siterator, siterator> priv_equal_range
( const KeyType &key
, KeyHasher hash_func
, KeyEqual equal_func) const
{
size_type n_bucket;
size_type cnt;
//Let's see if the element is present
std::pair<siterator, siterator> to_return
(this->priv_local_equal_range(key, hash_func, equal_func, n_bucket, cnt));
//If not, find the next element as ".second" if ".second" local iterator
//is not pointing to an element.
bucket_ptr const bp = this->priv_bucket_pointer();
if(to_return.first != to_return.second &&
to_return.second == bp[n_bucket].end()){
to_return.second = this->priv_invalid_local_it();
++n_bucket;
for( const size_type max_bucket = this->priv_bucket_count()
; n_bucket != max_bucket
; ++n_bucket){
bucket_type &b = bp[n_bucket];
if(!b.empty()){
to_return.second = b.begin();
break;
}
}
}
return to_return;
}
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->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()); }
/// @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::key_of_value
, typename packed_options::hash
, typename packed_options::equal
, bucket_traits
, typename packed_options::size_type
, (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));
BOOST_INTRUSIVE_FORCEINLINE 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)
{}
BOOST_INTRUSIVE_FORCEINLINE hashtable(BOOST_RV_REF(hashtable) x)
: Base(BOOST_MOVE_BASE(Base, x))
{}
BOOST_INTRUSIVE_FORCEINLINE hashtable& operator=(BOOST_RV_REF(hashtable) x)
{ return static_cast<hashtable&>(this->Base::operator=(BOOST_MOVE_BASE(Base, x))); }
template <class Cloner, class Disposer>
BOOST_INTRUSIVE_FORCEINLINE void clone_from(const hashtable &src, Cloner cloner, Disposer disposer)
{ Base::clone_from(src, cloner, disposer); }
template <class Cloner, class Disposer>
BOOST_INTRUSIVE_FORCEINLINE void clone_from(BOOST_RV_REF(hashtable) src, Cloner cloner, Disposer disposer)
{ Base::clone_from(BOOST_MOVE_BASE(Base, src), cloner, disposer); }
};
#endif
} //namespace intrusive
} //namespace boost
#include <boost/intrusive/detail/config_end.hpp>
#endif //BOOST_INTRUSIVE_HASHTABLE_HPP
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