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-rw-r--r--libraries/base/GHC/Conc/Windows.hs6
1 files changed, 6 insertions, 0 deletions
diff --git a/libraries/base/GHC/Conc/Windows.hs b/libraries/base/GHC/Conc/Windows.hs
index fe452cbe32..50b91aaa45 100644
--- a/libraries/base/GHC/Conc/Windows.hs
+++ b/libraries/base/GHC/Conc/Windows.hs
@@ -95,12 +95,18 @@ asyncWriteBA fd isSock len off bufB =
-- when the delay has expired, but the thread will never continue to
-- run /earlier/ than specified.
--
+-- Be careful not to exceed @maxBound :: Int@, which on 32-bit machines is only
+-- 2147483647 μs, less than 36 minutes.
+--
threadDelay :: Int -> IO ()
threadDelay = POSIX.threadDelay <!> WINIO.threadDelay
-- | Set the value of returned TVar to True after a given number of
-- microseconds. The caveats associated with threadDelay also apply.
--
+-- Be careful not to exceed @maxBound :: Int@, which on 32-bit machines is only
+-- 2147483647 μs, less than 36 minutes.
+--
registerDelay :: Int -> IO (TVar Bool)
registerDelay = POSIX.registerDelay <!> WINIO.registerDelay