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Insert/emplace with hint.

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This commit is contained in:
Daniel James
2016-08-17 12:08:15 +01:00
parent e58370b4ff
commit cae72eec2f
8 changed files with 307 additions and 56 deletions
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include/boost/unordered/detail/equivalent.hpp
+61 -2
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@@ -321,7 +321,10 @@ namespace boost { namespace unordered { namespace detail {
// Emplace/Insert
static inline void add_after_node(
// Add node 'n' to the group containing 'pos'.
// If 'pos' is the first node in group, add to the end of the group,
// otherwise add before 'pos'.
static inline void add_to_node_group(
node_pointer n,
node_pointer pos)
{
@@ -338,7 +341,7 @@ namespace boost { namespace unordered { namespace detail {
{
n->hash_ = key_hash;
if (pos.node_) {
this->add_after_node(n, pos.node_);
this->add_to_node_group(n, pos.node_);
if (n->next_) {
std::size_t next_bucket = this->hash_to_bucket(
static_cast<node_pointer>(n->next_)->hash_);
@@ -375,6 +378,24 @@ namespace boost { namespace unordered { namespace detail {
return iterator(n);
}
inline iterator add_using_hint(
node_pointer n,
node_pointer hint)
{
n->hash_ = hint->hash_;
this->add_to_node_group(n, hint);
if (n->next_ != hint && n->next_) {
std::size_t next_bucket = this->hash_to_bucket(
static_cast<node_pointer>(n->next_)->hash_);
if (next_bucket != this->hash_to_bucket(n->hash_)) {
this->get_bucket(next_bucket)->next_ = n;
}
}
++this->size_;
return iterator(n);
}
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
# if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
iterator emplace(boost::unordered::detail::emplace_args1<
@@ -383,6 +404,13 @@ namespace boost { namespace unordered { namespace detail {
BOOST_ASSERT(false);
return iterator();
}
iterator emplace_hint(c_iterator, boost::unordered::detail::emplace_args1<
boost::unordered::detail::please_ignore_this_overload> const&)
{
BOOST_ASSERT(false);
return iterator();
}
# else
iterator emplace(
boost::unordered::detail::please_ignore_this_overload const&)
@@ -390,6 +418,13 @@ namespace boost { namespace unordered { namespace detail {
BOOST_ASSERT(false);
return iterator();
}
iterator emplace_hint(c_iterator,
boost::unordered::detail::please_ignore_this_overload const&)
{
BOOST_ASSERT(false);
return iterator();
}
# endif
#endif
@@ -401,6 +436,14 @@ namespace boost { namespace unordered { namespace detail {
this->node_alloc(), BOOST_UNORDERED_EMPLACE_FORWARD)));
}
template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
iterator emplace_hint(c_iterator hint, BOOST_UNORDERED_EMPLACE_ARGS)
{
return iterator(emplace_hint_impl(hint,
boost::unordered::detail::func::construct_value_generic(
this->node_alloc(), BOOST_UNORDERED_EMPLACE_FORWARD)));
}
iterator emplace_impl(node_pointer n)
{
node_tmp a(n, this->node_alloc());
@@ -411,6 +454,22 @@ namespace boost { namespace unordered { namespace detail {
return this->add_node(a.release(), key_hash, position);
}
iterator emplace_hint_impl(c_iterator hint, node_pointer n)
{
node_tmp a(n, this->node_alloc());
key_type const& k = this->get_key(a.node_->value());
if (hint.node_ && this->key_eq()(k, this->get_key(*hint))) {
this->reserve_for_insert(this->size_ + 1);
return this->add_using_hint(a.release(), hint.node_);
}
else {
std::size_t key_hash = this->hash(k);
iterator position = this->find_node(key_hash, k);
this->reserve_for_insert(this->size_ + 1);
return this->add_node(a.release(), key_hash, position);
}
}
void emplace_impl_no_rehash(node_pointer n)
{
node_tmp a(n, this->node_alloc());