{-# LINE 1 "Network/Socket/ByteString/MsgHdr.hsc" #-}
{-# LANGUAGE CPP #-}
{-# LINE 2 "Network/Socket/ByteString/MsgHdr.hsc" #-}

-- | Support module for the POSIX 'sendmsg' system call.
module Network.Socket.ByteString.MsgHdr
  ( MsgHdr(..)
  ) where


{-# LINE 9 "Network/Socket/ByteString/MsgHdr.hsc" #-}

{-# LINE 10 "Network/Socket/ByteString/MsgHdr.hsc" #-}

import Foreign.C.Types (CInt, CSize)
import Foreign.Ptr (Ptr)
import Foreign.Storable (Storable(..))
import Network.Socket (SockAddr)

import Network.Socket.ByteString.IOVec (IOVec)

-- We don't use msg_control, msg_controllen, and msg_flags as these
-- don't exist on OpenSolaris.
data MsgHdr = MsgHdr
    { msgName    :: Ptr SockAddr
    , msgNameLen :: CSize
    , msgIov     :: Ptr IOVec
    , msgIovLen  :: CSize
    }

instance Storable MsgHdr where
  sizeOf _    = (56)
{-# LINE 29 "Network/Socket/ByteString/MsgHdr.hsc" #-}
  alignment _ = alignment (undefined :: CInt)

  peek p = do
    name       <- ((\hsc_ptr -> peekByteOff hsc_ptr 0))       p
{-# LINE 33 "Network/Socket/ByteString/MsgHdr.hsc" #-}
    nameLen    <- ((\hsc_ptr -> peekByteOff hsc_ptr 8))    p
{-# LINE 34 "Network/Socket/ByteString/MsgHdr.hsc" #-}
    iov        <- ((\hsc_ptr -> peekByteOff hsc_ptr 16))        p
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    iovLen     <- ((\hsc_ptr -> peekByteOff hsc_ptr 24))     p
{-# LINE 36 "Network/Socket/ByteString/MsgHdr.hsc" #-}
    return $ MsgHdr name nameLen iov iovLen

  poke p mh = do
    ((\hsc_ptr -> pokeByteOff hsc_ptr 0))       p (msgName       mh)
{-# LINE 40 "Network/Socket/ByteString/MsgHdr.hsc" #-}
    ((\hsc_ptr -> pokeByteOff hsc_ptr 8))    p (msgNameLen    mh)
{-# LINE 41 "Network/Socket/ByteString/MsgHdr.hsc" #-}
    ((\hsc_ptr -> pokeByteOff hsc_ptr 16))        p (msgIov        mh)
{-# LINE 42 "Network/Socket/ByteString/MsgHdr.hsc" #-}
    ((\hsc_ptr -> pokeByteOff hsc_ptr 24))     p (msgIovLen     mh)
{-# LINE 43 "Network/Socket/ByteString/MsgHdr.hsc" #-}