/// Metafunction converting option list to traits
/**
\p Options are:
- - \p opt::lock_type - mutex type, default is \p cds::sync::spin
- - \p opt::back_off - back-off strategy, defalt is \p cds::backoff::delay_of<2>
- - \p opt::allocator - allocator type, default is \ref CDS_DEFAULT_ALLOCATOR
+ - any \p cds::algo::flat_combining::make_traits options
- \p opt::stat - internal statistics, possible type: \p fcpqueue::stat, \p fcpqueue::empty_stat (the default)
- - \p opt::memory_model - C++ memory ordering model.
- List of all available memory ordering see \p opt::memory_model.
- Default is \p cds::opt::v:relaxed_ordering
*/
template <typename... Options>
struct make_traits {
op_push = cds::algo::flat_combining::req_Operation,
op_push_move,
op_pop,
- op_clear,
- op_empty
+ op_clear
};
// Flat combining publication list record
protected:
//@cond
- fc_kernel m_FlatCombining;
- priority_queue_type m_PQueue;
+ mutable fc_kernel m_FlatCombining;
+ priority_queue_type m_PQueue;
//@endcond
public:
value_type const& val ///< Value to be copied to inserted element
)
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
pRec->pValPush = &val;
m_FlatCombining.combine( op_push, pRec, *this );
value_type&& val ///< Value to be moved to inserted element
)
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
pRec->pValPush = &val;
m_FlatCombining.combine( op_push_move, pRec, *this );
value_type& val ///< Target to be received the copy of top element
)
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
pRec->pValPop = &val;
m_FlatCombining.combine( op_pop, pRec, *this );
/// Clears the priority queue
void clear()
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
m_FlatCombining.combine( op_clear, pRec, *this );
*/
bool empty()
{
- fc_record * pRec = m_FlatCombining.acquire_record();
-
- m_FlatCombining.combine( op_empty, pRec, *this );
- assert( pRec->is_done() );
- m_FlatCombining.release_record( pRec );
- return pRec->bEmpty;
+ bool bRet = false;
+ auto const& pq = m_PQueue;
+ m_FlatCombining.invoke_exclusive( [&pq, &bRet]() { bRet = pq.empty(); } );
+ return bRet;
}
/// Internal statistics
while ( !m_PQueue.empty() )
m_PQueue.pop();
break;
- case op_empty:
- pRec->bEmpty = m_PQueue.empty();
- break;
default:
assert(false);
break;