33 Thread support library [thread]

33.4 Mutual exclusion [thread.mutex]

33.4.4 Locks [thread.lock] Class template shared_­lock [thread.lock.shared] shared_­lock modifiers [thread.lock.shared.mod]

void swap(shared_lock& sl) noexcept;
Effects: Swaps the data members of *this and sl.
mutex_type* release() noexcept;
Returns: The previous value of pm.
Postconditions: pm == nullptr and owns == false.
template <class Mutex> void swap(shared_lock<Mutex>& x, shared_lock<Mutex>& y) noexcept;
Effects: As if by x.swap(y).