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{- git-annex assistant git-annex branch change tracking
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Assistant.BranchChange where
import Control.Concurrent.MSampleVar
import Common.Annex
newtype BranchChangeHandle = BranchChangeHandle (MSampleVar ())
newBranchChangeHandle :: IO BranchChangeHandle
newBranchChangeHandle = BranchChangeHandle <$> newEmptySV
branchChanged :: BranchChangeHandle -> IO ()
branchChanged (BranchChangeHandle h) = writeSV h ()
waitBranchChange :: BranchChangeHandle -> IO ()
waitBranchChange (BranchChangeHandle h) = readSV h
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