/// Metafunction converting option list to traits
/**
\p Options are:
- - \p opt::lock_type - mutex type, default is \p cds::lock::Spin
+ - \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
- \p opt::stat - internal statistics, possible type: \ref stat, \ref empty_stat (the default)