static unsigned hardware_concurrency();

template< class Rep, class Period > std::future_status wait_for(

void lock();

template< class Rep, class Period > bool try_lock_for( const

Defined in header

void unlock();

Defined in header

std::shared_future<T> share();

bool operator==( thread::id lhs, thread::id rhs );

T get(); (1) (member only of generic