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fillBytes :: Ptr a -> Word8 -> Int -> IO () #227

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Merged
merged 1 commit into from
Sep 25, 2019
Merged

fillBytes :: Ptr a -> Word8 -> Int -> IO () #227

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3 changes: 2 additions & 1 deletion hackage-security/src/Hackage/Security/Util/FileLock.hsc
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ lockImpl h ctx mode block = do
FD{fdFD = fd} <- handleToFd h
wh <- throwErrnoIf (== iNVALID_HANDLE_VALUE) ctx $ c_get_osfhandle fd
allocaBytes sizeof_OVERLAPPED $ \ovrlpd -> do
fillBytes ovrlpd (fromIntegral sizeof_OVERLAPPED) 0
fillBytes ovrlpd 0 sizeof_OVERLAPPED
let flags = cmode .|. (if block then 0 else #{const LOCKFILE_FAIL_IMMEDIATELY})
-- We want to lock the whole file without looking up its size to be
-- consistent with what flock does. According to documentation of LockFileEx
Expand All @@ -147,6 +147,7 @@ lockImpl h ctx mode block = do
| err == #{const ERROR_OPERATION_ABORTED} -> retry
| otherwise -> failWith ctx err
where
sizeof_OVERLAPPED :: Int
sizeof_OVERLAPPED = #{size OVERLAPPED}

cmode = case mode of
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