1 files changed, 11 insertions, 2 deletions

diff --git a/src/Data/Wrapper/PSQ.hs b/src/Data/Wrapper/PSQ.hs
index 5d32e16c..745e556b 100644
--- a/src/Data/Wrapper/PSQ.hs
+++ b/src/Data/Wrapper/PSQ.hs
@@ -22,9 +22,11 @@ fold' f a q = PSQueue.foldr f' a q
 -- import Data.OrdPSQ as OrdPSQ hiding (insert, map, singleton, minView)
 -- import qualified Data.OrdPSQ as OrdPSQ
 
-import Data.HashPSQ as HashPSQ hiding (insert, map, singleton, minView)
-import qualified Data.HashPSQ as Q
 import Data.Hashable
+import qualified Data.HashPSQ as Q
+         ;import Data.HashPSQ as HashPSQ hiding (insert, map, minView,
+                                          singleton)
+import Data.Time.Clock.POSIX  (POSIXTime)
 
 type PSQ' k p v = HashPSQ k p v
 type PSQ k p    = PSQ' k p ()
@@ -78,4 +80,11 @@ minView :: (PSQKey k, Ord p) => PSQ' k p v -> Maybe (Binding' k p v, PSQ' k p v)
 minView q = fmap (\(k,p,v,q') -> (Binding k v p, q')) $ Q.minView q
 {-# INLINE minView #-}
 
+
+-- | Utility to convert a 'POSIXTime' delta into microseconds suitable for
+-- passing to 'threadDelay'.
+toMicroseconds :: POSIXTime -> Int
+toMicroseconds = round . (* 1000) . (* 1000)
+
+
 #endif