18 Nov
                
                    2008
                
            
            
                18 Nov
                
                '08
                
            
            
            
        
    
                7:27 a.m.
            
        On Tue, Nov 18, 2008 at 2:04 AM, Ketil Malde 
Yes. Fine grained - I'm thinking a large Array of TVars. (If you only have a single TVar, it might as well be an MVar, no?)
With only one I think that IORef + atomicModifyIORef might even be better! :) -- ryan