list_empty atomic?

[Filipe David Manana]

Hello,

I have a list that is manipulated by several threads. Insert, remove
and iteration are protected by a lock. Is the locking necessary too
just for checking if the list is empty, i.e., is list_empty()
atomic/safe to call without the lock held or not?

thanks

-- 
Filipe David Manana,

"Reasonable men adapt themselves to the world.
 Unreasonable men adapt the world to themselves.
 That's why all progress depends on unreasonable men."