mutex_type* mutex() const;

explicit operator bool() const;

bool try_lock();

std::future<T> get_future();

Defined in header

template< class Clock, class Duration > bool try_lock_shared_until(

condition_variable(); (1)

bool try_lock_shared();

future_error( std::error_code ec );

void set_value_at_thread_exit( const R& value ); (1)