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.
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CDSLIB_INTRUSIVE_MICHAEL_LIST_RCU_H
typedef typename get_node_traits< value_type, node_type, hook>::type node_traits ; ///< node traits
typedef typename michael_list::get_link_checker< node_type, traits::link_checker >::type link_checker; ///< link checker
- typedef cds::urcu::gc<RCU> gc; ///< RCU schema
- typedef typename traits::back_off back_off; ///< back-off strategy
- typedef typename traits::item_counter item_counter; ///< Item counting policy used
- typedef typename traits::memory_model memory_model; ///< Memory ordering. See cds::opt::memory_model option
- typedef typename traits::rcu_check_deadlock rcu_check_deadlock; ///< Deadlock checking policy
+ typedef cds::urcu::gc<RCU> gc; ///< RCU schema
+ typedef typename traits::back_off back_off; ///< back-off strategy
+ typedef typename traits::item_counter item_counter; ///< Item counting policy used
+ typedef typename traits::memory_model memory_model; ///< Memory ordering. See cds::opt::memory_model option
+ typedef typename traits::rcu_check_deadlock rcu_check_deadlock; ///< Deadlock checking policy
+ typedef typename traits::stat stat; ///< Internal statistics
typedef typename gc::scoped_lock rcu_lock ; ///< RCU scoped lock
static CDS_CONSTEXPR const bool c_bExtractLockExternal = false; ///< Group of \p extract_xxx functions do not require external locking
, typename cds::opt::make_options< traits, Options...>::type
> type;
};
+
+ // Stat selector
+ template <typename Stat>
+ using select_stat_wrapper = michael_list::select_stat_wrapper< Stat >;
//@endcond
protected:
- typedef typename node_type::marked_ptr marked_node_ptr ; ///< Marked node pointer
- typedef typename node_type::atomic_marked_ptr atomic_node_ptr ; ///< Atomic node pointer
- typedef atomic_node_ptr auxiliary_head ; ///< Auxiliary head type (for split-list support)
+ typedef typename node_type::marked_ptr marked_node_ptr; ///< Marked node pointer
+ typedef typename node_type::atomic_marked_ptr atomic_node_ptr; ///< Atomic node pointer
+ typedef atomic_node_ptr auxiliary_head; ///< Auxiliary head type (for split-list support)
- atomic_node_ptr m_pHead ; ///< Head pointer
- item_counter m_ItemCounter ; ///< Item counter
+ atomic_node_ptr m_pHead; ///< Head pointer
+ item_counter m_ItemCounter; ///< Item counter
+ stat m_Stat; ///< Internal statistics
protected:
//@cond
static_assert( (std::is_same< gc, typename node_type::gc >::value), "GC and node_type::gc must be the same type" );
}
+ //@cond
+ template <typename Stat, typename = std::enable_if<std::is_same<stat, michael_list::wrapped_stat<Stat>>::value >>
+ explicit MichaelList( Stat& st )
+ : m_pHead( nullptr )
+ , m_Stat( st )
+ {}
+ //@endcond
+
/// Destroy list
~MichaelList()
{
return m_ItemCounter.value();
}
+ /// Returns const reference to internal statistics
+ stat const& statistics() const
+ {
+ return m_Stat;
+ }
protected:
//@cond
// split-list support
{
rcu_lock l;
while ( true ) {
- if ( search( refHead, val, pos, key_comparator()))
+ if ( search( refHead, val, pos, key_comparator())) {
+ m_Stat.onInsertFailed();
return false;
+ }
if ( link_node( node_traits::to_node_ptr( val ), pos ) ) {
f( val );
++m_ItemCounter;
+ m_Stat.onInsertSuccess();
return true;
}
// clear next field
node_traits::to_node_ptr( val )->m_pNext.store( marked_node_ptr(), memory_model::memory_order_relaxed );
+ m_Stat.onInsertRetry();
}
}
for (;;) {
{
rcu_lock l;
- if ( !search( refHead, val, pos, key_comparator() ) || node_traits::to_value_ptr( *pos.pCur ) != &val )
+ if ( !search( refHead, val, pos, key_comparator() ) || node_traits::to_value_ptr( *pos.pCur ) != &val ) {
+ m_Stat.onEraseFailed();
return false;
+ }
if ( !unlink_node( pos, erase_mask )) {
bkoff();
+ m_Stat.onEraseRetry();
continue;
}
}
--m_ItemCounter;
+ m_Stat.onEraseSuccess();
return true;
}
}
for (;;) {
{
rcu_lock l;
- if ( !search( pos.refHead, val, pos, cmp ) )
+ if ( !search( pos.refHead, val, pos, cmp ) ) {
+ m_Stat.onEraseFailed();
return false;
+ }
+
// store pCur since it may be changed by unlink_node() slow path
pDel = pos.pCur;
if ( !unlink_node( pos, erase_mask )) {
bkoff();
+ m_Stat.onEraseRetry();
continue;
}
}
assert( pDel );
f( *node_traits::to_value_ptr( pDel ) );
--m_ItemCounter;
+ m_Stat.onEraseSuccess();
return true;
}
}
{
rcu_lock l;
for (;;) {
- if ( !search( refHead, val, pos, cmp ) )
+ if ( !search( refHead, val, pos, cmp )) {
+ m_Stat.onEraseFailed();
return nullptr;
+ }
+
// store pCur since it may be changed by unlink_node() slow path
pExtracted = pos.pCur;
if ( !unlink_node( pos, extract_mask )) {
bkoff();
+ m_Stat.onEraseRetry();
continue;
}
--m_ItemCounter;
value_type * pRet = node_traits::to_value_ptr( pExtracted );
assert( pExtracted->m_pDelChain == nullptr );
+ m_Stat.onEraseSuccess();
return pRet;
}
}
if ( search( refHead, val, pos, cmp ) ) {
assert( pos.pCur != nullptr );
f( *node_traits::to_value_ptr( *pos.pCur ), val );
+ m_Stat.onFindSuccess();
return true;
}
- return false;
- }
+ }
+
+ m_Stat.onFindFailed();
+ return false;
}
template <typename Q, typename Compare>
position pos( refHead );
- if ( search( refHead, val, pos, cmp ))
+ if ( search( refHead, val, pos, cmp )) {
+ m_Stat.onFindSuccess();
return raw_ptr( node_traits::to_value_ptr( pos.pCur ), raw_ptr_disposer( pos ));
+ }
+
+ m_Stat.onFindFailed();
return raw_ptr( raw_ptr_disposer( pos ));
}
//@endcond
if ( cds_likely( pPrev->compare_exchange_weak( pCur, marked_node_ptr( pNext.ptr() ), memory_model::memory_order_acquire, atomics::memory_order_relaxed ))) {
if ( pNext.bits() == erase_mask )
link_to_remove_chain( pos, pCur.ptr() );
+ m_Stat.onHelpingSuccess();
}
+ m_Stat.onHelpingFailed();
goto try_again;
}
assert( gc::is_locked() );
while ( true ) {
- if ( search( pos.refHead, val, pos, key_comparator() ) )
+ if ( search( pos.refHead, val, pos, key_comparator() )) {
+ m_Stat.onInsertFailed();
return false;
+ }
if ( link_node( node_traits::to_node_ptr( val ), pos ) ) {
++m_ItemCounter;
+ m_Stat.onInsertSuccess();
return true;
}
// clear next field
node_traits::to_node_ptr( val )->m_pNext.store( marked_node_ptr(), memory_model::memory_order_relaxed );
+ m_Stat.onInsertRetry();
}
}
assert( key_comparator()( val, *node_traits::to_value_ptr( *pos.pCur ) ) == 0 );
func( false, *node_traits::to_value_ptr( *pos.pCur ), val );
+ m_Stat.onUpdateExisting();
return std::make_pair( iterator( pos.pCur ), false );
}
else {
- if ( !bInsert )
+ if ( !bInsert ) {
+ m_Stat.onUpdateFailed();
return std::make_pair( end(), false );
+ }
if ( link_node( node_traits::to_node_ptr( val ), pos ) ) {
++m_ItemCounter;
func( true, val , val );
+ m_Stat.onUpdateNew();
return std::make_pair( iterator( node_traits::to_node_ptr( val )), true );
}
// clear the next field
node_traits::to_node_ptr( val )->m_pNext.store( marked_node_ptr(), memory_model::memory_order_relaxed );
+ m_Stat.onUpdateRetry();
}
}
}
if ( search( pos.refHead, val, pos, cmp ) ) {
assert( pos.pCur != nullptr );
+ m_Stat.onFindSuccess();
return const_iterator( pos.pCur );
}
+
+ m_Stat.onFindFailed();
return cend();
}
//@endcond
projects / libcds.git / blobdiff