System.Mem.Weak.IORef

Documentation

mkWeakIORef' :: IORef k -> v -> Maybe (IO ()) -> IO (Weak v)

Make an arbitrary Weak reference from a IORef.

Provides a more general API than the crippled one offered by mkWeakIORef to match the power of mkWeak.

mkWeakIORefPtr :: IORef k -> Maybe (IO ()) -> IO (Weak (IORef k))

Functions like mkWeakPtr but for IORefs.

Make an arbitrary Weak reference from an IORef and an optional finalizer.

A specialised version of mkWeakIORef' where the key and value are the same.

mkWeakIORefPair :: IORef k -> v -> Maybe (IO ()) -> IO (Weak (IORef k, v))

A specialised version of mkWeakIORef' where the value is actually a pair of the key and value passed to mkWeakIORefPair:

mkWeakIORefPair key val finalizer ≡ mkWeakIORef' key (key,val) finalizer

The advantage of this is that the key can be retrieved by deRefWeak in addition to the value.