Le 14 nov. 08 à 15:42, Daniel Bünzli a écrit :

> I'm not sure I understand what you want to do (what is the original  
> value ?).

I think I understood now, the original value was the custom block.

If you were using the custom block only for finalization issues (not  
serialization, hashing etc.) then one solution would be to replace  
your custom block type by the bigarray itself. An register the  
bigarray with Gc.finalise to deallocate the C pointer at the  
appropriate time. Then you have

type t = bigarray
let to_bigarray x = x

and no problems.

Best,

Daniel