{

public:

virtual ~shared_poly_lockable() = 0;

virtual void lock_shared() = 0;

virtual bool try_lock_shared() = 0;

virtual void unlock_shared() = 0;

virtual bool try_lock_shared_until(chrono::system_clock::time_point const & abs_time)=0;

virtual bool try_lock_shared_until(chrono::steady_clock::time_point const & abs_time)=0;

template <typename Clock, typename Duration>

bool try_lock_shared_until(chrono::time_point<Clock, Duration> const & abs_time)

{

return try_lock_shared_until(chrono::time_point_cast<Clock::time_point>(abs_time));

}

virtual bool try_lock_shared_for(chrono::nanoseconds const & relative_time)=0;

template <typename Rep, typename Period>

bool try_lock_shared_for(chrono::duration<Rep, Period> const & rel_time)

{

return try_lock_shared_for(chrono::duration_cast<chrono::nanoseconds>(rel_time));

}

{

public:

virtual ~upgrade_poly_lockable() = 0;

virtual void lock_upgrade() = 0;

virtual bool try_lock_upgrade() = 0;

virtual void unlock_upgrade() = 0;

virtual bool try_lock_upgrade_until(chrono::system_clock::time_point const & abs_time)=0;

virtual bool try_lock_upgrade_until(chrono::steady_clock::time_point const & abs_time)=0;

template <typename Clock, typename Duration>

bool try_lock_upgrade_until(chrono::time_point<Clock, Duration> const & abs_time)

{

return try_lock_upgrade_until(chrono::time_point_cast<Clock::time_point>(abs_time));

}

virtual bool try_lock_upgrade_for(chrono::nanoseconds const & relative_time)=0;

template <typename Rep, typename Period>

bool try_lock_upgrade_for(chrono::duration<Rep, Period> const & rel_time)

{

return try_lock_upgrade_for(chrono::duration_cast<chrono::nanoseconds>(rel_time));

}

virtual bool try_unlock_shared_and_lock() = 0;

virtual bool try_unlock_shared_and_lock_until(chrono::system_clock::time_point const & abs_time)=0;

virtual bool try_unlock_shared_and_lock_until(chrono::steady_clock::time_point const & abs_time)=0;

template <typename Clock, typename Duration>

bool try_unlock_shared_and_lock_until(chrono::time_point<Clock, Duration> const & abs_time)

{

return try_unlock_shared_and_lock_until(chrono::time_point_cast<Clock::time_point>(abs_time));

}

virtual bool try_unlock_shared_and_lock_for(chrono::nanoseconds const & relative_time)=0;

template <typename Rep, typename Period>

bool try_unlock_shared_and_lock_for(chrono::duration<Rep, Period> const & rel_time)

{

return try_unlock_shared_and_lock_for(chrono::duration_cast<chrono::nanoseconds>(rel_time));

}

virtual void unlock_and_lock_shared() = 0;

virtual bool try_unlock_shared_and_lock_upgrade() = 0;

virtual bool try_unlock_shared_and_lock_upgrade_until(chrono::system_clock::time_point const & abs_time)=0;

virtual bool try_unlock_shared_and_lock_upgrade_until(chrono::steady_clock::time_point const & abs_time)=0;

template <typename Clock, typename Duration>

bool try_unlock_shared_and_lock_upgrade_until(chrono::time_point<Clock, Duration> const & abs_time)

{

return try_unlock_shared_and_lock_upgrade_until(chrono::time_point_cast<Clock::time_point>(abs_time));

}

virtual bool try_unlock_shared_and_lock_upgrade_for(chrono::nanoseconds const & relative_time)=0;

template <typename Rep, typename Period>

bool try_unlock_shared_and_lock_upgrade_for(chrono::duration<Rep, Period> const & rel_time)

{

return try_unlock_shared_and_lock_upgrade_for(chrono::duration_cast<chrono::nanoseconds>(rel_time));

}

virtual void unlock_and_lock_upgrade() = 0;

virtual void unlock_upgrade_and_lock() = 0;

virtual bool try_unlock_upgrade_and_lock() = 0;

virtual bool try_unlock_upgrade_and_lock_until(chrono::system_clock::time_point const & abs_time)=0;

virtual bool try_unlock_upgrade_and_lock_until(chrono::steady_clock::time_point const & abs_time)=0;

template <typename Clock, typename Duration>

bool try_unlock_upgrade_and_lock_until(chrono::time_point<Clock, Duration> const & abs_time)

{

return try_unlock_upgrade_and_lock_until(chrono::time_point_cast<Clock::time_point>(abs_time));

}

virtual bool try_unlock_upgrade_and_lock_for(chrono::nanoseconds const & relative_time)=0;

template <typename Rep, typename Period>

bool try_unlock_upgrade_and_lock_for(chrono::duration<Rep, Period> const & rel_time)

{

return try_unlock_upgrade_and_lock_for(chrono::duration_cast<chrono::nanoseconds>(rel_time));

}

virtual void unlock_upgrade_and_lock_shared() = 0;