On Sun, Oct 31, 2010 at 10:14 PM, Matthew Steele <mdste...@alum.mit.edu> wrote: > I have an object to which I have added one or more finalizers via > addFinalizer from System.Mem.Weak. I would like to have a function that > allows me to make use of the object within a block of IO code, and guarantee > that the finalizer(s) will not be called during the code block -- sort of > like withForeignPtr, but for arbitrary objects. Does such a function exist, > and if not, how could I write one? > > I can imagine writing something like: > > \begin{code} > withObject :: a -> IO b -> IO b > withObject obj action = do > result <- action > touchObject obj -- touchObject :: a -> IO () > return result > \end{code} >
CC'ing GHC-users list. The 'primitive' package has a general purpose 'touch' function: http://hackage.haskell.org/packages/archive/primitive/0.3.1/doc/html/Control-Monad-Primitive.html#v:touch But it doesn't state what guarantees are provided by the function. Antoine _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users