-//$$CDS-header$$
+/*
+ This file is a part of libcds - Concurrent Data Structures library
+
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+ 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_INTRUSIVE_SKIP_LIST_NOGC_H
#define CDSLIB_INTRUSIVE_SKIP_LIST_NOGC_H
/// Access to element of next pointer array
atomic_ptr& next( unsigned int nLevel )
{
- assert( nLevel < height() );
- assert( nLevel == 0 || (nLevel > 0 && m_arrNext != nullptr) );
+ assert( nLevel < height());
+ assert( nLevel == 0 || (nLevel > 0 && m_arrNext != nullptr));
return nLevel ? m_arrNext[ nLevel - 1] : m_pNext;
}
/// Access to element of next pointer array (const version)
atomic_ptr const& next( unsigned int nLevel ) const
{
- assert( nLevel < height() );
+ assert( nLevel < height());
assert( nLevel == 0 || nLevel > 0 && m_arrNext != nullptr );
return nLevel ? m_arrNext[ nLevel - 1] : m_pNext;
public: // for internal use only!!!
iterator( node_type& refHead )
- : m_pNode( refHead[0].load( atomics::memory_order_relaxed ) )
+ : m_pNode( refHead[0].load( atomics::memory_order_relaxed ))
{}
static iterator from_node( node_type * pNode )
{
node_type * p = pos.pSucc[0];
pNode->next( 0 ).store( pos.pSucc[ 0 ], memory_model::memory_order_release );
- if ( !pos.pPrev[0]->next(0).compare_exchange_strong( p, pNode, memory_model::memory_order_release, memory_model::memory_order_relaxed ) ) {
+ if ( !pos.pPrev[0]->next(0).compare_exchange_strong( p, pNode, memory_model::memory_order_release, memory_model::memory_order_relaxed )) {
return false;
}
f( val );
if ( pNode->next( nLevel ).compare_exchange_strong( p, q, memory_model::memory_order_release, memory_model::memory_order_relaxed )) {
p = q;
- if ( pos.pPrev[nLevel]->next(nLevel).compare_exchange_strong( q, pNode, memory_model::memory_order_release, memory_model::memory_order_relaxed ) )
+ if ( pos.pPrev[nLevel]->next(nLevel).compare_exchange_strong( q, pNode, memory_model::memory_order_release, memory_model::memory_order_relaxed ))
break;
}
void increase_height( unsigned int nHeight )
{
unsigned int nCur = m_nHeight.load( memory_model::memory_order_relaxed );
- while ( nCur < nHeight && !m_nHeight.compare_exchange_weak( nCur, nHeight, memory_model::memory_order_acquire, atomics::memory_order_relaxed ) );
+ while ( nCur < nHeight && !m_nHeight.compare_exchange_weak( nCur, nHeight, memory_model::memory_order_acquire, atomics::memory_order_relaxed ));
}
//@endcond
}
public:
- /// Iterator type
+ ///@name Forward iterators
+ //@{
+ /// Forward iterator
+ /**
+ The forward iterator for a split-list has some features:
+ - it has no post-increment operator
+ - it depends on iterator of underlying \p OrderedList
+ */
typedef skip_list::details::iterator< gc, node_traits, back_off, false > iterator;
/// Const iterator type
/// Returns a forward iterator addressing the first element in a set
iterator begin()
{
- return iterator( *m_Head.head() );
+ return iterator( *m_Head.head());
}
/// Returns a forward const iterator addressing the first element in a set
const_iterator begin() const
{
- return const_iterator( *m_Head.head() );
+ return const_iterator( *m_Head.head());
}
/// Returns a forward const iterator addressing the first element in a set
const_iterator cbegin() const
{
- return const_iterator( *m_Head.head() );
+ return const_iterator( *m_Head.head());
}
/// Returns a forward iterator that addresses the location succeeding the last element in a set.
{
return const_iterator();
}
+ //@}
protected:
//@cond
The functor can change non-key fields of the \p item; however, \p func must guarantee
that during changing no any other modifications could be made on this item by concurrent threads.
- Returns std::pair<bool, bool> where \p first is \p true if operation is successfull,
+ Returns std::pair<bool, bool> where \p first is \p true if operation is successful,
\p second is \p true if new item has been added or \p false if the item with \p key
already is in the set.
projects / libcds.git / blobdiff