-//$$CDS-header$$
+/*
+ This file is a part of libcds - Concurrent Data Structures library
+
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2016
+
+ Source code repo: http://github.com/khizmax/libcds/
+ Download: http://sourceforge.net/projects/libcds/files/
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
#ifndef CDSLIB_CONTAINER_IMPL_MICHAEL_KVLIST_H
#define CDSLIB_CONTAINER_IMPL_MICHAEL_KVLIST_H
namespace cds { namespace container {
- /// Michael's ordered list fo key-value pair
+ /// Michael's ordered list for key-value pair
/** @ingroup cds_nonintrusive_list
\anchor cds_nonintrusive_MichaelKVList_gc
- \p Value - value type stored in a list
- \p Traits - type traits, default is \p michael_list::traits
- It is possible to declare option-based list with \p cds::container::michael_list::make_traits metafunction istead of \p Traits template
+ It is possible to declare option-based list with \p cds::container::michael_list::make_traits metafunction instead of \p Traits template
argument. For example, the following traits-based declaration of \p gc::HP Michael's list
\code
#include <cds/container/michael_kvlist_hp.h>
#endif
typedef typename base_class::gc gc; ///< Garbage collector used
+ typedef Traits traits; ///< List traits
typedef typename base_class::back_off back_off; ///< Back-off strategy used
typedef typename maker::allocator_type allocator_type; ///< Allocator type used for allocate/deallocate the nodes
typedef typename base_class::item_counter item_counter; ///< Item counting policy used
typedef typename maker::key_comparator key_comparator; ///< key comparison functor
typedef typename base_class::memory_model memory_model; ///< Memory ordering. See cds::opt::memory_model option
+ typedef typename base_class::stat stat; ///< Internal statistics
+
+ static CDS_CONSTEXPR const size_t c_nHazardPtrCount = base_class::c_nHazardPtrCount; ///< Count of hazard pointer required for the algorithm
+
+ //@cond
+ // Rebind traits (split-list support)
+ template <typename... Options>
+ struct rebind_traits {
+ typedef MichaelKVList<
+ gc
+ , key_type, mapped_type
+ , typename cds::opt::make_options< traits, Options...>::type
+ > type;
+ };
+
+ // Stat selector
+ template <typename Stat>
+ using select_stat_wrapper = typename base_class::template select_stat_wrapper< Stat >;
+ //@endcond
protected:
//@cond
- Iterator ensures thread-safety even if you delete the item that iterator points to. However, in case of concurrent
deleting operations it is no guarantee that you iterate all item in the list.
- Therefore, the use of iterators in concurrent environment is not good idea. Use the iterator on the concurrent container
- for debug purpose only.
+ @warning Use this iterator on the concurrent container for debugging purpose only.
The iterator interface to access item data:
- <tt> operator -> </tt> - returns a pointer to \ref value_type for iterator
*/
typedef iterator_type<true> const_iterator;
+ ///@name Forward iterators (only for debugging purpose)
+ //@{
/// Returns a forward iterator addressing the first element in a list
/**
For empty list \code begin() == end() \endcode
}
/// Returns a forward const iterator addressing the first element in a list
- //@{
const_iterator begin() const
{
return const_iterator( head() );
}
+
+ /// Returns a forward const iterator addressing the first element in a list
const_iterator cbegin() const
{
return const_iterator( head() );
}
- //@}
/// Returns an const iterator that addresses the location succeeding the last element in a list
- //@{
const_iterator end() const
{
return const_iterator();
}
+
+ /// Returns an const iterator that addresses the location succeeding the last element in a list
const_iterator cend() const
{
return const_iterator();
}
- //@}
+ //@}
public:
/// Default constructor
MichaelKVList()
{}
- /// List desctructor
+ //@cond
+ template <typename Stat, typename = std::enable_if<std::is_same<stat, michael_list::wrapped_stat<Stat>>::value >>
+ explicit MichaelKVList( Stat& st )
+ : base_class( st )
+ {}
+ //@endcond
+
+ /// List destructor
/**
Clears the list
*/
Returns \p true if inserting successful, \p false otherwise.
*/
template <typename K>
- bool insert( const K& key )
+ bool insert( K&& key )
{
- return insert_at( head(), key );
+ return insert_at( head(), std::forward<K>( key ));
}
/// Inserts new node with a key and a value
Returns \p true if inserting successful, \p false otherwise.
*/
template <typename K, typename V>
- bool insert( const K& key, const V& val )
+ bool insert( K&& key, V&& val )
{
// We cannot use insert with functor here
// because we cannot lock inserted node for updating
// Therefore, we use separate function
- return insert_at( head(), key, val );
+ return insert_at( head(), std::forward<K>( key ), std::forward<V>( val ));
}
/// Inserts new node and initialize it by a functor
@warning See \ref cds_intrusive_item_creating "insert item troubleshooting"
*/
template <typename K, typename Func>
- bool insert_with( const K& key, Func func )
+ bool insert_with( K&& key, Func func )
{
- return insert_with_at( head(), key, func );
+ return insert_with_at( head(), std::forward<K>( key ), func );
}
/// Updates data by \p key
however, \p func must guarantee that during changing no any other modifications
could be made on this item by concurrent threads.
- Returns <tt> std::pair<bool, bool> </tt> where \p first is true if operation is successfull,
+ Returns <tt> std::pair<bool, bool> </tt> where \p first is true if operation is successful,
\p second is true if new item has been added or \p false if the item with \p key
already exists.
@warning See \ref cds_intrusive_item_creating "insert item troubleshooting"
*/
template <typename K, typename Func>
- std::pair<bool, bool> update( K const& key, Func f, bool bAllowInsert = true )
+ std::pair<bool, bool> update( K&& key, Func f, bool bAllowInsert = true )
{
- return update_at( head(), key, f, bAllowInsert );
+ return update_at( head(), std::forward<K>( key ), f, bAllowInsert );
}
//@cond
- // Deprecated
template <typename K, typename Func>
+ CDS_DEPRECATED("ensure() is deprecated, use update()")
std::pair<bool, bool> ensure( K const& key, Func f )
{
return update( key, f, true );
template <typename K>
guarded_ptr extract( K const& key )
{
- guarded_ptr gp;
- extract_at( head(), gp.guard(), key, intrusive_key_comparator() );
- return gp;
+ return extract_at( head(), key, intrusive_key_comparator() );
}
/// Extracts the item from the list with comparing functor \p pred
guarded_ptr extract_with( K const& key, Less pred )
{
CDS_UNUSED( pred );
- guarded_ptr gp;
- extract_at( head(), gp.guard(), key, typename maker::template less_wrapper<Less>::type() );
- return gp;
+ return extract_at( head(), key, typename maker::template less_wrapper<Less>::type() );
}
/// Checks whether the list contains \p key
return find_at( head(), key, intrusive_key_comparator() );
}
//@cond
- // Deprecated
template <typename Q>
+ CDS_DEPRECATED("deprecated, use contains()")
bool find( Q const& key )
{
return contains( key );
return find_at( head(), key, typename maker::template less_wrapper<Less>::type() );
}
//@cond
- // Deprecated
template <typename Q, typename Less>
+ CDS_DEPRECATED("deprecated, use contains()")
bool find_with( Q const& key, Less pred )
{
CDS_UNUSED( pred );
and returns it as \p guarded_ptr.
If \p key is not found the function returns an empty guarded pointer.
- The \p disposer specified in \p Traits class template parameter is called
- by garbage collector \p GC automatically when returned \p guarded_ptr object
- will be destroyed or released.
@note Each \p guarded_ptr object uses one GC's guard which can be limited resource.
Usage:
template <typename K>
guarded_ptr get( K const& key )
{
- guarded_ptr gp;
- get_at( head(), gp.guard(), key, intrusive_key_comparator() );
- return gp;
+ return get_at( head(), key, intrusive_key_comparator() );
}
/// Finds the \p key and return the item found
guarded_ptr get_with( K const& key, Less pred )
{
CDS_UNUSED( pred );
- guarded_ptr gp;
- get_at( head(), gp.guard(), key, typename maker::template less_wrapper<Less>::type() );
- return gp;
+ return get_at( head(), key, typename maker::template less_wrapper<Less>::type() );
}
/// Checks if the list is empty
base_class::clear();
}
+ /// Returns const reference to internal statistics
+ stat const& statistics() const
+ {
+ return base_class::statistics();
+ }
+
protected:
//@cond
bool insert_node_at( head_type& refHead, node_type * pNode )
}
template <typename K>
- bool insert_at( head_type& refHead, const K& key )
+ bool insert_at( head_type& refHead, K&& key )
{
- return insert_node_at( refHead, alloc_node( key ));
+ return insert_node_at( refHead, alloc_node( std::forward<K>( key )));
}
template <typename K, typename V>
- bool insert_at( head_type& refHead, const K& key, const V& val )
+ bool insert_at( head_type& refHead, K&& key, V&& val )
{
- return insert_node_at( refHead, alloc_node( key, val ));
+ return insert_node_at( refHead, alloc_node( std::forward<K>( key ), std::forward<V>( val )));
}
template <typename K, typename Func>
- bool insert_with_at( head_type& refHead, const K& key, Func f )
+ bool insert_with_at( head_type& refHead, K&& key, Func f )
{
- scoped_node_ptr pNode( alloc_node( key ));
+ scoped_node_ptr pNode( alloc_node( std::forward<K>( key )));
if ( base_class::insert_at( refHead, *pNode, [&f](node_type& node){ f( node.m_Data ); })) {
pNode.release();
}
template <typename K, typename Func>
- std::pair<bool, bool> update_at( head_type& refHead, const K& key, Func f, bool bAllowInsert )
+ std::pair<bool, bool> update_at( head_type& refHead, K&& key, Func f, bool bAllowInsert )
{
- scoped_node_ptr pNode( alloc_node( key ));
+ scoped_node_ptr pNode( alloc_node( std::forward<K>( key )));
std::pair<bool, bool> ret = base_class::update_at( refHead, *pNode,
[&f]( bool bNew, node_type& node, node_type& ){ f( bNew, node.m_Data ); },
return base_class::erase_at( refHead, key, cmp, [&f]( node_type const & node ){ f( const_cast<value_type&>(node.m_Data)); });
}
template <typename K, typename Compare>
- bool extract_at( head_type& refHead, typename guarded_ptr::native_guard& guard, K const& key, Compare cmp )
+ guarded_ptr extract_at( head_type& refHead, K const& key, Compare cmp )
{
- return base_class::extract_at( refHead, guard, key, cmp );
+ return base_class::extract_at( refHead, key, cmp );
}
template <typename K, typename Compare>
}
template <typename K, typename Compare>
- bool get_at( head_type& refHead, typename guarded_ptr::native_guard& guard, K const& key, Compare cmp )
+ guarded_ptr get_at( head_type& refHead, K const& key, Compare cmp )
{
- return base_class::get_at( refHead, guard, key, cmp );
+ return base_class::get_at( refHead, key, cmp );
}
//@endcond
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