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This patch simply adds forkOSUnmasked to Control.Concurrent:

-- | Like 'forkIOWithUnmask', but the child thread is a bound thread,
-- as with 'forkOS'.
forkOSWithUnmask :: ((forall a . IO a -> IO a) -> IO ()) -> IO ThreadId
forkOSWithUnmask io = forkOS (io unsafeUnmask)

I ran sh validate, and no new failures were introduced. I'll push it to master in a few days, unless someone objects.

For GHC < 7.8, forkOSWithUnmask can be achieved using forkOS and block, but block is removed in GHC 7.8. unsafeUnmask can still be imported from GHC.IO, however.

Trac metadata

Trac field	Value
Version	7.7
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	libraries/base
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