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Undo prepared IOOps when exceptions occur during batch submission #37

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Undo prepared IOOps when exceptions occur during batch submission #37

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21 changes: 21 additions & 0 deletions src/System/IO/BlockIO/URingFFI.hsc
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@

module System.IO.BlockIO.URingFFI where

import Data.Void
import Foreign
import Foreign.C
import Prelude hiding (head, tail)
Expand Down Expand Up @@ -93,6 +94,26 @@ foreign import capi unsafe "liburing.h io_uring_prep_write"
foreign import capi unsafe "liburing.h io_uring_prep_nop"
io_uring_prep_nop :: Ptr URingSQE -> IO ()

io_uring_prep_cancel64_shim :: Ptr URingSQE -> CULong -> CInt -> IO ()
#ifdef LIBURING_HAVE_DATA64
io_uring_prep_cancel64_shim p user_data flags =
io_uring_prep_cancel64 p user_data flags
#else
io_uring_prep_cancel64_shim p user_data flags =
alloca $ \(p_user_data :: Ptr CULong) -> do
poke (castPtr p_user_data) user_data
io_uring_prep_cancel p p_user_data flags
#endif

foreign import capi unsafe "liburing.h io_uring_prep_cancel64"
io_uring_prep_cancel64 :: Ptr URingSQE -> CULong -> CInt -> IO ()

foreign import capi unsafe "liburing.h io_uring_prep_cancel"
io_uring_prep_cancel :: Ptr URingSQE -> Ptr Void -> CInt -> IO ()

iORING_ASYNC_CANCEL_ANY :: CUInt
iORING_ASYNC_CANCEL_ANY = #{const IORING_ASYNC_CANCEL_ANY}

foreign import capi unsafe "liburing.h io_uring_submit"
io_uring_submit :: Ptr URing -> IO CInt

Expand Down
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