Re: Finalizers and FFI

HI Gracjan,

I would like to attach finalizer (written in Haskell) to some pointer. When the pointer won't be needed any more, finalizer should run. So here is the code:

import Foreign.ForeignPtr

I couldn't get finalisers to work either with the newForeignPtr from this module. I didn't know how to create a proper FunPtr. In Foreign.Concurrent there is a newForeignPtr that is easier to use: newForeignPtr :: Ptr a -> IO () -> IO (ForeignPtr a) This one worked beautifully for me. In your code something like: import Foreign.ForeignPtr hiding (newForeignPtr) import Foreign.Concurrent ... fptr <- newForeignPtr ptr (finDoIt ptr) Hope this helps, Arjan