Add mkWeakTMVar to Control.Concurrent.STM.TMVar
I just needed a Weak pointer to a TMVar:
-- | Make a 'Weak' pointer to a 'TMVar', using the second argument as
-- a finalizer to run when 'TMVar' is garbage-collected.
mkWeakTMVar :: TMVar a -> IO () -> IO (Weak (TMVar a))
mkWeakTMVar tmv@(TMVar (TVar t#)) f = IO $ \s ->
case mkWeak# t# tmv f s of (# s1, w #) -> (# s1, Weak w #)
It might make sense to add a similar function for TSem as well.
Trac metadata
Trac field | Value |
---|---|
Version | 7.8.2 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries (other) |
Test case | |
Differential revisions | |
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Blocking | |
CC | |
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