namespace std {/ [saferecl.rcu.base], class template rcu_obj_basetemplate<class T, class D = default_delete<T>>class rcu_obj_base;
/ [saferecl.rcu.domain], class rcu_domainclass rcu_domain;
/ [saferecl.rcu.domain.func], non-member functions
rcu_domain& rcu_default_domain()noexcept;
void rcu_synchronize(rcu_domain& dom = rcu_default_domain()noexcept;
void rcu_barrier(rcu_domain& dom = rcu_default_domain()noexcept;
template<class T, class D = default_delete<T>>void rcu_retire(T* p, D d = D(), rcu_domain& dom = rcu_default_domain();
}