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{-# LANGUAGE CPP #-}
{-# LANGUAGE ForeignFunctionInterface #-}
{-# LANGUAGE EmptyDataDecls #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE RecordWildCards #-}
module Tango.DeviceProxy (
deviceproxy
, DeviceProxy ) where
import Control.Exception
import Foreign.C
import Foreign.Ptr
import Foreign.Storable
import Foreign.Marshal.Array
import Foreign.Marshal.Alloc
#let alignment t = "%lu", (unsigned long)offsetof(struct {char x__; t (y__); }, y__)
#include "tango.h"
data DeviceProxy = DeviceProxy
foreign import ccall "_ZN5Tango11DeviceProxyC1EPKcPN5CORBA3ORBE" deviceproxy_DeviceProxy :: (Ptr DeviceProxy) -> CString -> Ptr a -> IO ()
class New a where
new :: IO (Ptr a)
instance Storable DeviceProxy where
sizeOf _ = #{size Tango::DeviceProxy}
deviceproxy :: String -> IO (Ptr DeviceProxy)
deviceproxy d = do
device <- newCString d
dev <- malloc :: IO (Ptr DeviceProxy)
deviceproxy_DeviceProxy dev device nullPtr
return dev
main :: IO ()
main = do
diffractometer <- catch (deviceproxy "toto")
(\e -> do let err = show (e :: IOException)
hPutStr stderr ("Warning: Couldn't open " ++ f ++ ": " ++ err)
return "")
return ()
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