-%
+
% (c) The AQUA Project, Glasgow University, 1994-1996
%
module PrelHandle where
import PrelBase
-import PrelArr ( newVar, readVar, writeVar, ByteArray )
+import PrelAddr ( Addr, nullAddr )
+import PrelArr ( newVar, readVar, writeVar, ByteArray(..) )
import PrelRead ( Read )
import PrelList ( span )
import PrelIOBase
-import PrelException ( Exception(..), throw, catch, fail, catchException )
+import PrelException
import PrelMaybe ( Maybe(..) )
+import PrelEnum
+import PrelNum
+import PrelShow
import PrelAddr ( Addr, nullAddr )
-import PrelBounded () -- get at Bounded Int instance.
-import PrelNum ( toInteger )
-import PrelWeak ( addForeignFinaliser )
+import PrelNum ( toInteger, toBig )
+import PrelPack ( packString )
+import PrelWeak ( addForeignFinalizer )
+import Ix
+
#if __CONCURRENT_HASKELL__
import PrelConc
#endif
-import Ix
#ifndef __PARALLEL_HASKELL__
-import PrelForeign ( makeForeignObj, writeForeignObj )
+import PrelForeign ( makeForeignObj )
#endif
#endif /* ndef(__HUGS__) */
#define CCALL(fun) _ccall_ fun
#define const_BUFSIZ ``BUFSIZ''
#define primPackString
+#endif
+
#ifndef __PARALLEL_HASKELL__
#define FILE_OBJECT ForeignObj
#else
#define FILE_OBJECT Addr
#endif
-#endif
-
\end{code}
%*********************************************************
\begin{code}
{-# INLINE newHandle #-}
{-# INLINE withHandle #-}
-{-# INLINE writeHandle #-}
newHandle :: Handle__ -> IO Handle
-withHandle :: Handle -> (Handle__ -> IO a) -> IO a
-writeHandle :: Handle -> Handle__ -> IO ()
#if defined(__CONCURRENT_HASKELL__)
-- Use MVars for concurrent Haskell
newHandle hc = newMVar hc >>= \ h ->
return (Handle h)
+#else
- -- withHandle grabs the handle lock, performs
- -- some operation over it, making sure that we
- -- unlock & reset the handle state should an
- -- exception occur while performing said op.
+-- Use ordinary MutableVars for non-concurrent Haskell
+newHandle hc = stToIO (newVar hc >>= \ h ->
+ return (Handle h))
+#endif
+\end{code}
+
+%*********************************************************
+%* *
+\subsection{@withHandle@ operations}
+%* *
+%*********************************************************
+
+In the concurrent world, handles are locked during use. This is done
+by wrapping an MVar around the handle which acts as a mutex over
+operations on the handle.
+
+To avoid races, we use the following bracketing operations. The idea
+is to obtain the lock, do some operation and replace the lock again,
+whether the operation succeeded or failed. We also want to handle the
+case where the thread receives an exception while processing the IO
+operation: in these cases we also want to relinquish the lock.
+
+There are three versions of @withHandle@: corresponding to the three
+possible combinations of:
+
+ - the operation may side-effect the handle
+ - the operation may return a result
+
+If the operation generates an error or an exception is raised, the
+orignal handle is always replaced [ this is the case at the moment,
+but we might want to revisit this in the future --SDM ].
+
+\begin{code}
+#ifdef __CONCURRENT_HASKELL__
+withHandle :: Handle -> (Handle__ -> IO (Handle__,a)) -> IO a
withHandle (Handle h) act = do
h_ <- takeMVar h
+ (h',v) <- catchException (act h_) (\ ex -> putMVar h h_ >> throw ex)
+ putMVar h h'
+ return v
+
+withHandle_ :: Handle -> (Handle__ -> IO a) -> IO a
+withHandle_ (Handle h) act = do
+ h_ <- takeMVar h
v <- catchException (act h_) (\ ex -> putMVar h h_ >> throw ex)
+ putMVar h h_
return v
-writeHandle (Handle h) hc = putMVar h hc
-#else
-
--- Use ordinary MutableVars for non-concurrent Haskell
-newHandle hc = stToIO (newVar hc >>= \ h ->
- return (Handle h))
+withHandle__ :: Handle -> (Handle__ -> IO Handle__) -> IO ()
+withHandle__ (Handle h) act = do
+ h_ <- takeMVar h
+ h' <- catchException (act h_) (\ ex -> putMVar h h_ >> throw ex)
+ putMVar h h'
+ return ()
+#else
-- of questionable value to install this exception
-- handler, but let's do it in the non-concurrent
-- case too, for now.
v <- catchException (act h_) (\ ex -> stToIO (writeVar h h_) >> throw ex)
return v
-writeHandle (Handle h) hc = stToIO (writeVar h hc)
#endif
-
\end{code}
nullFile__ is only used for closed handles, plugging it in as a null
%*********************************************************
%* *
-\subsection{Handle Finalisers}
+\subsection{Handle Finalizers}
%* *
%*********************************************************
freeFileObject :: ForeignObj -> IO ()
freeFileObject fo = CCALL(freeFileObject) fo
#else
-foreign import stdcall "./libHS_cbits.dll" "freeStdFileObject" freeStdFileObject :: ForeignObj -> IO ()
-foreign import stdcall "./libHS_cbits.dll" "freeFileObject" freeFileObject :: ForeignObj -> IO ()
+foreign import stdcall "libHS_cbits.so" "freeStdFileObject" freeStdFileObject :: ForeignObj -> IO ()
+foreign import stdcall "libHS_cbits.so" "freeFileObject" freeFileObject :: ForeignObj -> IO ()
#endif
\end{code}
or output channel respectively. The third manages output to the
standard error channel. These handles are initially open.
+
\begin{code}
stdin, stdout, stderr :: Handle
stdout = unsafePerformIO (do
- rc <- CCALL(getLock) 1 1 -- ConcHask: SAFE, won't block
- case rc of
+ rc <- CCALL(getLock) (1::Int) (1::Int) -- ConcHask: SAFE, won't block
+ case (rc::Int) of
0 -> newHandle (mkClosedHandle__)
1 -> do
#ifndef __CONCURRENT_HASKELL__
- fo <- CCALL(openStdFile) 1 1{-flush on close-} 0{-writeable-} -- ConcHask: SAFE, won't block
+ fo <- CCALL(openStdFile) (1::Int)
+ (1::Int){-flush on close-}
+ (0::Int){-writeable-} -- ConcHask: SAFE, won't block
#else
- fo <- CCALL(openStdFile) 1 (1{-flush on close-} {-+ 128 don't block on I/O-})
- 0{-writeable-} -- ConcHask: SAFE, won't block
+ fo <- CCALL(openStdFile) (1::Int)
+ ((1{-flush on close-} + 128 {- don't block on I/O-})::Int)
+ (0::Int){-writeable-} -- ConcHask: SAFE, won't block
#endif
#ifndef __PARALLEL_HASKELL__
fo <- makeForeignObj fo
- addForeignFinaliser fo (freeStdFileObject fo)
+ addForeignFinalizer fo (freeStdFileObject fo)
#endif
#ifdef __HUGS__
)
stdin = unsafePerformIO (do
- rc <- CCALL(getLock) 0 0 -- ConcHask: SAFE, won't block
- case rc of
+ rc <- CCALL(getLock) (0::Int) (0::Int) -- ConcHask: SAFE, won't block
+ case (rc::Int) of
0 -> newHandle (mkClosedHandle__)
1 -> do
#ifndef __CONCURRENT_HASKELL__
- fo <- CCALL(openStdFile) 0 0{-don't flush on close -} 1{-readable-} -- ConcHask: SAFE, won't block
+ fo <- CCALL(openStdFile) (0::Int)
+ (0::Int){-don't flush on close -}
+ (1::Int){-readable-} -- ConcHask: SAFE, won't block
#else
- fo <- CCALL(openStdFile) 0 (0{-flush on close-} {- + 128 don't block on I/O-})
- 1{-readable-} -- ConcHask: SAFE, won't block
+ fo <- CCALL(openStdFile) (0::Int)
+ ((0{-flush on close-} + 128 {- don't block on I/O-})::Int)
+ (1::Int){-readable-} -- ConcHask: SAFE, won't block
#endif
#ifndef __PARALLEL_HASKELL__
fo <- makeForeignObj fo
- addForeignFinaliser fo (freeStdFileObject fo)
+ addForeignFinalizer fo (freeStdFileObject fo)
#endif
(bm, bf_size) <- getBMode__ fo
mkBuffer__ fo bf_size
stderr = unsafePerformIO (do
- rc <- CCALL(getLock) 2 1 -- ConcHask: SAFE, won't block
- case rc of
+ rc <- CCALL(getLock) (2::Int) (1::Int){-writeable-} -- ConcHask: SAFE, won't block
+ case (rc::Int) of
0 -> newHandle (mkClosedHandle__)
1 -> do
#ifndef __CONCURRENT_HASKELL__
- fo <- CCALL(openStdFile) 2 1{-flush on close-} 0{-writeable-} -- ConcHask: SAFE, won't block
+ fo <- CCALL(openStdFile) (2::Int)
+ (1::Int){-flush on close-}
+ (0::Int){-writeable-} -- ConcHask: SAFE, won't block
#else
- fo <- CCALL(openStdFile) 2 (1{-flush on close-} {- + 128 don't block on I/O-})
- 0{-writeable-} -- ConcHask: SAFE, won't block
+ fo <- CCALL(openStdFile) (2::Int)
+ ((1{-flush on close-} + 128 {- don't block on I/O-})::Int)
+ (0::Int){-writeable-} -- ConcHask: SAFE, won't block
#endif
#ifndef __PARALLEL_HASKELL__
fo <- makeForeignObj fo
- addForeignFinaliser fo (freeStdFileObject fo)
+ addForeignFinalizer fo (freeStdFileObject fo)
#endif
- newHandle (Handle__ fo WriteHandle NoBuffering "stderr")
+ hdl <- newHandle (Handle__ fo WriteHandle NoBuffering "stderr")
+ -- when stderr and stdout are both connected to a terminal, ensure
+ -- that anything buffered on stdout is flushed prior to writing to
+ -- stderr.
+ hConnectTo stdout hdl
+ return hdl
+
_ -> do ioError <- constructError "stderr"
newHandle (mkErrorHandle__ ioError)
)
openFileEx :: FilePath -> IOModeEx -> IO Handle
openFileEx f m = do
- fo <- CCALL(openFile) (primPackString f) file_mode binary file_flags -- ConcHask: SAFE, won't block
+ fo <- CCALL(openFile) (primPackString f) (file_mode::Int)
+ (binary::Int)
+ (file_flags::Int) -- ConcHask: SAFE, won't block
if fo /= nullAddr then do
#ifndef __PARALLEL_HASKELL__
fo <- makeForeignObj fo
- addForeignFinaliser fo (freeFileObject fo)
+ addForeignFinalizer fo (freeFileObject fo)
#endif
(bm, bf_size) <- getBMode__ fo
mkBuffer__ fo bf_size
where
(imo, binary) =
case m of
- BinaryMode imo -> (imo, 1)
- TextMode imo -> (imo, 0)
+ BinaryMode bmo -> (bmo, 1)
+ TextMode tmo -> (tmo, 0)
#ifndef __CONCURRENT_HASKELL__
file_flags = file_flags'
#else
- file_flags = file_flags' {-+ 128 Don't block on I/O-}
+ -- See comment next to 'stderr' for why we leave
+ -- non-blocking off for now.
+ file_flags = file_flags' + 128 -- Don't block on I/O
#endif
(file_flags', file_mode) =
hClose :: Handle -> IO ()
hClose handle =
- withHandle handle $ \ handle_ -> do
+ withHandle__ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hClose" handle
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> return handle_
_ -> do
- rc <- CCALL(closeFile) (haFO__ handle_) 1{-flush if you can-} -- ConcHask: SAFE, won't block
+ rc <- CCALL(closeFile) (haFO__ handle_) (1::Int){-flush if you can-} -- ConcHask: SAFE, won't block
{- We explicitly close a file object so that we can be told
if there were any errors. Note that after @hClose@
has been performed, the ForeignObj embedded in the Handle
is still lying around in the heap, so care is taken
to avoid closing the file object when the ForeignObj
- is finalised. (we overwrite the file ptr in the underlying
+ is finalized. (we overwrite the file ptr in the underlying
FileObject with a NULL as part of closeFile())
-}
- if rc == 0
- then
- writeHandle handle (handle_{ haType__ = ClosedHandle,
- haFO__ = nullFile__ })
- else do
- writeHandle handle handle_
- constructErrorAndFail "hClose"
+ if rc == (0::Int)
+ then return (handle_{ haType__ = ClosedHandle,
+ haFO__ = nullFile__ })
+ else constructErrorAndFail "hClose"
\end{code}
\begin{code}
hFileSize :: Handle -> IO Integer
hFileSize handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hFileSize" handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hFileSize" handle
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hFileSize" handle
+ SemiClosedHandle -> ioe_closedHandle "hFileSize" handle
#ifdef __HUGS__
- other -> do
+ _ -> do
mem <- primNewByteArray sizeof_int64
rc <- CCALL(fileSize_int64) (haFO__ handle_) mem -- ConcHask: SAFE, won't block
- writeHandle handle handle_
if rc == 0 then do
result <- primReadInt64Array mem 0
return (primInt64ToInteger result)
else
constructErrorAndFail "hFileSize"
#else
- other ->
+ _ ->
-- HACK! We build a unique MP_INT of the right shape to hold
-- a single unsigned word, and we let the C routine
-- change the data bits
-- For some reason, this fails to typecheck if converted to a do
-- expression --SDM
_casm_ ``%r = 1;'' >>= \(I# hack#) ->
- case int2Integer hack# of
- result@(J# _ _ d#) -> do
- rc <- CCALL(fileSize) (haFO__ handle_) d# -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- if rc == 0 then
- return result
+ case int2Integer# hack# of
+ (# s, d #) -> do
+ rc <- CCALL(fileSize) (haFO__ handle_) d -- ConcHask: SAFE, won't block
+ if rc == (0::Int) then
+ return (J# s d)
else
constructErrorAndFail "hFileSize"
#endif
wantReadableHandle "hIsEOF" handle $ \ handle_ -> do
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(fileEOF) fo) -- ConcHask: UNSAFE, may block
- writeHandle handle handle_
case rc of
0 -> return False
1 -> return True
hSetBuffering handle mode =
case mode of
BlockBuffering (Just n)
- | n <= 0 -> fail (IOError (Just handle)
+ | n <= 0 -> ioError
+ (IOError (Just handle)
InvalidArgument
"hSetBuffering"
("illegal buffer size " ++ showsPrec 9 n [])) -- 9 => should be parens'ified.
_ ->
- withHandle handle $ \ handle_ -> do
+ withHandle__ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hSetBuffering" handle
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hSetBuffering" handle
_ -> do
{- Note:
- we flush the old buffer regardless of whether
rc <- mayBlock fo (CCALL(setBuffering) fo bsize) -- ConcHask: UNSAFE, may block
if rc == 0
then do
- writeHandle handle (handle_{ haBufferMode__ = mode })
+ return (handle_{ haBufferMode__ = mode })
else do
-- Note: failure to change the buffer size will cause old buffer to be flushed.
- writeHandle handle handle_
constructErrorAndFail "hSetBuffering"
where
bsize :: Int
wantWriteableHandle "hFlush" handle $ \ handle_ -> do
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(flushFile) fo) -- ConcHask: UNSAFE, may block
- writeHandle handle handle_
if rc == 0 then
return ()
else
hGetPosn handle =
wantSeekableHandle "hGetPosn" handle $ \ handle_ -> do
posn <- CCALL(getFilePosn) (haFO__ handle_) -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- if posn /= -1 then
+ if posn /= -1 then do
return (HandlePosn handle posn)
else
constructErrorAndFail "hGetPosn"
wantSeekableHandle "hSetPosn" handle $ \ handle_ -> do -- not as silly as it looks: the handle may have been closed in the meantime.
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(setFilePosn) fo posn) -- ConcHask: UNSAFE, may block
- writeHandle handle handle_
- if rc == 0 then
+ if rc == 0 then do
return ()
else
constructErrorAndFail "hSetPosn"
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(seekFile_int64) fo whence (primIntegerToInt64 offset)) -- ConcHask: UNSAFE, may block
#else
-hSeek handle mode offset@(J# _ s# d#) =
+hSeek handle mode i@(S# _) = hSeek handle mode (toBig i)
+hSeek handle mode (J# s# d#) =
wantSeekableHandle "hSeek" handle $ \ handle_ -> do
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(seekFile) fo whence (I# s#) d#) -- ConcHask: UNSAFE, may block
#endif
- writeHandle handle handle_
- if rc == 0 then
+ if rc == 0 then do
return ()
else
constructErrorAndFail "hSeek"
\begin{code}
hIsOpen :: Handle -> IO Bool
hIsOpen handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- return False
- SemiClosedHandle -> do
- writeHandle handle handle_
- return False
- _ -> do
- writeHandle handle handle_
- return True
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> return False
+ SemiClosedHandle -> return False
+ _ -> return True
hIsClosed :: Handle -> IO Bool
hIsClosed handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- return True
- _ -> do
- writeHandle handle handle_
- return False
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> return True
+ _ -> return False
{- not defined, nor exported, but mentioned
here for documentation purposes:
hIsReadable :: Handle -> IO Bool
hIsReadable handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsReadable" handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsReadable" handle
- htype -> do
- writeHandle handle handle_
- return (isReadable htype)
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hIsReadable" handle
+ SemiClosedHandle -> ioe_closedHandle "hIsReadable" handle
+ htype -> return (isReadable htype)
where
isReadable ReadHandle = True
isReadable ReadWriteHandle = True
hIsWritable :: Handle -> IO Bool
hIsWritable handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsWritable" handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsWritable" handle
- htype -> do
- writeHandle handle handle_
- return (isWritable htype)
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hIsWritable" handle
+ SemiClosedHandle -> ioe_closedHandle "hIsWritable" handle
+ htype -> return (isWritable htype)
where
isWritable AppendHandle = True
isWritable WriteHandle = True
\begin{code}
hGetBuffering :: Handle -> IO BufferMode
hGetBuffering handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hGetBuffering" handle
- _ -> do
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hGetBuffering" handle
+ _ ->
{-
We're being non-standard here, and allow the buffering
of a semi-closed handle to be queried. -- sof 6/98
-}
- let v = haBufferMode__ handle_
- writeHandle handle handle_
- return v -- could be stricter..
-
+ return (haBufferMode__ handle_) -- could be stricter..
\end{code}
\begin{code}
hIsSeekable :: Handle -> IO Bool
hIsSeekable handle =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsSeekable" handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsSeekable" handle
- AppendHandle -> do
- writeHandle handle handle_
- return False
- other -> do
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hIsSeekable" handle
+ SemiClosedHandle -> ioe_closedHandle "hIsSeekable" handle
+ AppendHandle -> return False
+ _ -> do
rc <- CCALL(seekFileP) (haFO__ handle_) -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- case rc of
+ case (rc::Int) of
0 -> return False
1 -> return True
_ -> constructErrorAndFail "hIsSeekable"
if not isT
then return ()
else
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hSetEcho" handle
- other -> do
- rc <- CCALL(setTerminalEcho) (haFO__ handle_) (if on then 1 else 0) -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- if rc /= -1
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hSetEcho" handle
+ _ -> do
+ rc <- CCALL(setTerminalEcho) (haFO__ handle_) ((if on then 1 else 0)::Int) -- ConcHask: SAFE, won't block
+ if rc /= ((-1)::Int)
then return ()
else constructErrorAndFail "hSetEcho"
if not isT
then return False
else
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hGetEcho" handle
- other -> do
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hGetEcho" handle
+ _ -> do
rc <- CCALL(getTerminalEcho) (haFO__ handle_) -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- case rc of
+ case (rc::Int) of
1 -> return True
0 -> return False
_ -> constructErrorAndFail "hSetEcho"
hIsTerminalDevice :: Handle -> IO Bool
hIsTerminalDevice handle = do
- withHandle handle $ \ handle_ -> do
- case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "hIsTerminalDevice" handle
- other -> do
+ withHandle_ handle $ \ handle_ -> do
+ case haType__ handle_ of
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "hIsTerminalDevice" handle
+ _ -> do
rc <- CCALL(isTerminalDevice) (haFO__ handle_) -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- case rc of
+ case (rc::Int) of
1 -> return True
0 -> return False
_ -> constructErrorAndFail "hIsTerminalDevice"
hConnectTo hW hR = hConnectHdl_ hW hR 0{-connect regardless-}
hConnectHdl_ :: Handle -> Handle -> Int -> IO ()
-hConnectHdl_ hW hR is_tty =
- wantWriteableHandle "hConnectTo" hW $ \ hW_ -> do
- wantReadableHandle "hConnectTo" hR $ \ hR_ -> do
+hConnectHdl_ hW hR is_tty =
+ wantRWHandle "hConnectTo" hW $ \ hW_ ->
+ wantRWHandle "hConnectTo" hR $ \ hR_ -> do
CCALL(setConnectedTo) (haFO__ hR_) (haFO__ hW_) is_tty -- ConcHask: SAFE, won't block
- writeHandle hR hR_
- writeHandle hW hW_
+#ifndef __PARALLEL_HASKELL__
+#define FILE_OBJECT ForeignObj
+#else
+#define FILE_OBJECT Addr
+#endif
+
+flushConnectedBuf :: FILE_OBJECT -> IO ()
+flushConnectedBuf fo = CCALL(flushConnectedBuf) fo
\end{code}
As an extension, we also allow characters to be pushed back.
hUngetChar handle c =
wantReadableHandle "hLookAhead" handle $ \ handle_ -> do
rc <- CCALL(ungetChar) (haFO__ handle_) c -- ConcHask: SAFE, won't block
- writeHandle handle handle_
- if rc == (-1)
+ if rc == ((-1)::Int)
then constructErrorAndFail "hUngetChar"
else return ()
handle <- openFile fname ReadMode
sz <- hFileSize handle
if sz > toInteger (maxBound::Int) then
- fail (userError "slurpFile: file too big")
+ ioError (userError "slurpFile: file too big")
else do
let sz_i = fromInteger sz
chunk <- CCALL(allocMemory__) (sz_i::Int)
then do
hClose handle
constructErrorAndFail "slurpFile"
- else
- withHandle handle $ \ handle_ -> do
- let fo = haFO__ handle_
- rc <- mayBlock fo (CCALL(readChunk) fo chunk sz_i) -- ConcHask: UNSAFE, may block.
- writeHandle handle handle_
+ else do
+ rc <- withHandle_ handle ( \ handle_ -> do
+ let fo = haFO__ handle_
+ mayBlock fo (CCALL(readChunk) fo chunk sz_i) -- ConcHask: UNSAFE, may block.
+ )
hClose handle
- if rc < 0
+ if rc < (0::Int)
then constructErrorAndFail "slurpFile"
else return (chunk, rc)
#ifndef __HUGS__ /* Hugs' Prelude doesn't need this */
hFillBufBA :: Handle -> ByteArray Int -> Int -> IO Int
hFillBufBA handle buf sz
- | sz <= 0 = fail (IOError (Just handle)
+ | sz <= 0 = ioError (IOError (Just handle)
InvalidArgument
"hFillBufBA"
("illegal buffer size " ++ showsPrec 9 sz [])) -- 9 => should be parens'ified.
#else
rc <- mayBlock fo (CCALL(readChunk) fo buf sz) -- ConcHask: UNSAFE, may block.
#endif
- writeHandle handle handle_
- if rc >= 0
+ if rc >= (0::Int)
then return rc
else constructErrorAndFail "hFillBufBA"
#endif
hFillBuf :: Handle -> Addr -> Int -> IO Int
hFillBuf handle buf sz
- | sz <= 0 = fail (IOError (Just handle)
+ | sz <= 0 = ioError (IOError (Just handle)
InvalidArgument
"hFillBuf"
("illegal buffer size " ++ showsPrec 9 sz [])) -- 9 => should be parens'ified.
wantReadableHandle "hFillBuf" handle $ \ handle_ -> do
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(readChunk) fo buf sz) -- ConcHask: UNSAFE, may block.
- writeHandle handle handle_
if rc >= 0
then return rc
else constructErrorAndFail "hFillBuf"
wantWriteableHandle "hPutBuf" handle $ \ handle_ -> do
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(writeBuf) fo buf len) -- ConcHask: UNSAFE, may block.
- writeHandle handle handle_
- if rc == 0
+ if rc == (0::Int)
then return ()
else constructErrorAndFail "hPutBuf"
-#ifndef __HUGS__ /* Another one Hugs doesn't provide */
+#ifndef __HUGS__ /* An_ one Hugs doesn't provide */
hPutBufBA :: Handle -> ByteArray Int -> Int -> IO ()
hPutBufBA handle buf len =
wantWriteableHandle "hPutBufBA" handle $ \ handle_ -> do
let fo = haFO__ handle_
rc <- mayBlock fo (CCALL(writeBufBA) fo buf len) -- ConcHask: UNSAFE, may block.
- writeHandle handle handle_
- if rc == 0
+ if rc == (0::Int)
then return ()
else constructErrorAndFail "hPutBuf"
#endif
\begin{code}
getHandleFd :: Handle -> IO Int
-getHandleFd handle = do
- withHandle handle $ \ handle_ -> do
+getHandleFd handle =
+ withHandle_ handle $ \ handle_ -> do
case (haType__ handle_) of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle "getHandleFd" handle
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle "getHandleFd" handle
_ -> do
fd <- CCALL(getFileFd) (haFO__ handle_)
- writeHandle handle handle_
return fd
\end{code}
ioeGetFileName (IOError _ _ _ str) =
case span (/=':') str of
- (fs,[]) -> Nothing
+ (_,[]) -> Nothing
(fs,_) -> Just fs
\end{code}
+'Top-level' IO actions want to catch exceptions (e.g., forkIO and
+PrelMain.mainIO) and report them - topHandler is the exception
+handler they should use for this:
+
+\begin{code}
+-- make sure we handle errors while reporting the error!
+-- (e.g. evaluating the string passed to 'error' might generate
+-- another error, etc.)
+topHandler :: Bool -> Exception -> IO ()
+topHandler bombOut err = catchException (real_handler bombOut err) (topHandler bombOut)
+
+real_handler :: Bool -> Exception -> IO ()
+real_handler bombOut ex =
+ case ex of
+ AsyncException StackOverflow -> reportStackOverflow bombOut
+ ErrorCall s -> reportError bombOut s
+ other -> reportError bombOut (showsPrec 0 other "\n")
+
+reportStackOverflow :: Bool -> IO ()
+reportStackOverflow bombOut = do
+ (hFlush stdout) `catchException` (\ _ -> return ())
+ callStackOverflowHook
+ if bombOut then
+ stg_exit 2
+ else
+ return ()
+
+reportError :: Bool -> String -> IO ()
+reportError bombOut str = do
+ (hFlush stdout) `catchException` (\ _ -> return ())
+ let bs@(ByteArray (_,len) _) = packString str
+ writeErrString addrOf_ErrorHdrHook bs len
+ if bombOut then
+ stg_exit 1
+ else
+ return ()
+
+foreign label "ErrorHdrHook"
+ addrOf_ErrorHdrHook :: Addr
+
+foreign import ccall "writeErrString__"
+ writeErrString :: Addr -> ByteArray Int -> Int -> IO ()
+
+foreign import ccall "stackOverflow"
+ callStackOverflowHook :: IO ()
+
+foreign import ccall "stg_exit"
+ stg_exit :: Int -> IO ()
+\end{code}
+
+
A number of operations want to get at a readable or writeable handle, and fail
if it isn't:
\begin{code}
wantReadableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a
wantReadableHandle fun handle act =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle fun handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle fun handle
- AppendHandle -> do
- writeHandle handle handle_
- fail not_readable_error
- WriteHandle -> do
- writeHandle handle handle_
- fail not_readable_error
- other -> act handle_
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle fun handle
+ SemiClosedHandle -> ioe_closedHandle fun handle
+ AppendHandle -> ioError not_readable_error
+ WriteHandle -> ioError not_readable_error
+ _ -> act handle_
where
not_readable_error =
IOError (Just handle) IllegalOperation fun
wantWriteableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a
wantWriteableHandle fun handle act =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle fun handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle fun handle
- ReadHandle -> do
- writeHandle handle handle_
- fail not_writeable_error
- other -> act handle_
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle fun handle
+ SemiClosedHandle -> ioe_closedHandle fun handle
+ ReadHandle -> ioError not_writeable_error
+ _ -> act handle_
where
not_writeable_error =
IOError (Just handle) IllegalOperation fun
("handle is not open for writing")
+wantRWHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a
+wantRWHandle fun handle act =
+ withHandle_ handle $ \ handle_ -> do
+ case haType__ handle_ of
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle fun handle
+ SemiClosedHandle -> ioe_closedHandle fun handle
+ _ -> act handle_
+
wantSeekableHandle :: String -> Handle -> (Handle__ -> IO a) -> IO a
wantSeekableHandle fun handle act =
- withHandle handle $ \ handle_ -> do
+ withHandle_ handle $ \ handle_ -> do
case haType__ handle_ of
- ErrorHandle ioError -> do
- writeHandle handle handle_
- fail ioError
- ClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle fun handle
- SemiClosedHandle -> do
- writeHandle handle handle_
- ioe_closedHandle fun handle
- AppendHandle -> do
- writeHandle handle handle_
- fail not_seekable_error
- _ -> act handle_
+ ErrorHandle theError -> ioError theError
+ ClosedHandle -> ioe_closedHandle fun handle
+ SemiClosedHandle -> ioe_closedHandle fun handle
+ AppendHandle -> ioError not_seekable_error
+ _ -> act handle_
where
not_seekable_error =
IOError (Just handle)
\begin{code}
ioe_closedHandle :: String -> Handle -> IO a
-ioe_closedHandle fun h = fail (IOError (Just h) IllegalOperation fun "handle is closed")
+ioe_closedHandle fun h = ioError (IOError (Just h) IllegalOperation fun "handle is closed")
\end{code}
Internal helper functions for Concurrent Haskell implementation
mayBlock :: Addr -> IO Int -> IO Int
#endif
-#ifndef notyet /*__CONCURRENT_HASKELL__*/
-mayBlock _ act = act
-#else
mayBlock fo act = do
rc <- act
case rc of
CCALL(setConnNonBlockingIOFlag__) fo -- reset (connected) file object.
return rc
-#endif
-
-#ifdef __HUGS__
+-- #ifdef __HUGS__
threadDelay, threadWaitRead, threadWaitWrite :: Int -> IO ()
-- Hugs does actually have the primops needed to implement these
--- but, like GHC, the primops don't actually do anything...
-threadDelay _ = return ()
-threadWaitRead _ = return ()
-threadWaitWrite _ = return ()
-#endif
+-- but the primops don't actually do anything...
+threadDelay (I# ms) = IO $ \s -> case delay# ms s of s -> (# s, () #)
+threadWaitRead (I# fd) = IO $ \s -> case waitRead# fd s of s -> (# s, () #)
+threadWaitWrite (I# fd) = IO $ \s -> case waitWrite# fd s of s -> (# s, () #)
+-- #endif
\end{code}
type FILE_OBJ = Addr
#endif
-foreign import stdcall "libHS_cbits.so" "setBuf" prim_setBuf :: FILE_OBJ -> Addr -> Int -> IO ()
-foreign import stdcall "libHS_cbits.so" "getBufSize" prim_getBufSize :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "inputReady" prim_inputReady :: FILE_OBJ -> Int -> IO RC
-foreign import stdcall "libHS_cbits.so" "fileGetc" prim_fileGetc :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "fileLookAhead" prim_fileLookAhead :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "readBlock" prim_readBlock :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "readLine" prim_readLine :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "readChar" prim_readChar :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "writeFileObject" prim_writeFileObject :: FILE_OBJ -> Int -> IO RC
-foreign import stdcall "libHS_cbits.so" "filePutc" prim_filePutc :: FILE_OBJ -> Char -> IO RC
-foreign import stdcall "libHS_cbits.so" "getBufStart" prim_getBufStart :: FILE_OBJ -> Int -> IO Addr
-foreign import stdcall "libHS_cbits.so" "getWriteableBuf" prim_getWriteableBuf :: FILE_OBJ -> IO Addr
-foreign import stdcall "libHS_cbits.so" "getBufWPtr" prim_getBufWPtr :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "setBufWPtr" prim_setBufWPtr :: FILE_OBJ -> Int -> IO ()
-foreign import stdcall "libHS_cbits.so" "closeFile" prim_closeFile :: FILE_OBJ -> Flush -> IO RC
-foreign import stdcall "libHS_cbits.so" "fileEOF" prim_fileEOF :: FILE_OBJ -> IO RC
-foreign import stdcall "libHS_cbits.so" "setBuffering" prim_setBuffering :: FILE_OBJ -> Int -> IO RC
-foreign import stdcall "libHS_cbits.so" "flushFile" prim_flushFile :: FILE_OBJ -> IO RC
-foreign import stdcall "libHS_cbits.so" "getBufferMode" prim_getBufferMode :: FILE_OBJ -> IO RC
-foreign import stdcall "libHS_cbits.so" "seekFile_int64" prim_seekFile_int64 :: FILE_OBJ -> Int -> Int64 -> IO RC
-foreign import stdcall "libHS_cbits.so" "seekFileP" prim_seekFileP :: FILE_OBJ -> IO RC
-foreign import stdcall "libHS_cbits.so" "setTerminalEcho" prim_setTerminalEcho :: FILE_OBJ -> Int -> IO RC
-foreign import stdcall "libHS_cbits.so" "getTerminalEcho" prim_getTerminalEcho :: FILE_OBJ -> IO RC
-foreign import stdcall "libHS_cbits.so" "isTerminalDevice" prim_isTerminalDevice :: FILE_OBJ -> IO RC
-foreign import stdcall "libHS_cbits.so" "setConnectedTo" prim_setConnectedTo :: FILE_OBJ -> FILE_OBJ -> Int -> IO ()
-foreign import stdcall "libHS_cbits.so" "ungetChar" prim_ungetChar :: FILE_OBJ -> Char -> IO RC
-foreign import stdcall "libHS_cbits.so" "readChunk" prim_readChunk :: FILE_OBJ -> Addr -> Int -> IO RC
-foreign import stdcall "libHS_cbits.so" "writeBuf" prim_writeBuf :: FILE_OBJ -> Addr -> Int -> IO RC
-foreign import stdcall "libHS_cbits.so" "getFileFd" prim_getFileFd :: FILE_OBJ -> IO FD
-foreign import stdcall "libHS_cbits.so" "fileSize_int64" prim_fileSize_int64 :: FILE_OBJ -> Bytes -> IO RC
-foreign import stdcall "libHS_cbits.so" "getFilePosn" prim_getFilePosn :: FILE_OBJ -> IO Int
-foreign import stdcall "libHS_cbits.so" "setFilePosn" prim_setFilePosn :: FILE_OBJ -> Int -> IO Int
-foreign import stdcall "libHS_cbits.so" "getConnFileFd" prim_getConnFileFd :: FILE_OBJ -> IO FD
-foreign import stdcall "libHS_cbits.so" "allocMemory__" prim_allocMemory__ :: Int -> IO Addr
-foreign import stdcall "libHS_cbits.so" "getLock" prim_getLock :: FD -> Exclusive -> IO RC
-foreign import stdcall "libHS_cbits.so" "openStdFile" prim_openStdFile :: FD -> OpenStdFlags -> Readable -> IO IOFileAddr
-foreign import stdcall "libHS_cbits.so" "openFile" prim_openFile :: CString -> How -> Binary -> OpenFlags -> IO IOFileAddr
-foreign import stdcall "libHS_cbits.so" "freeFileObject" prim_freeFileObject :: FILE_OBJ -> IO ()
-foreign import stdcall "libHS_cbits.so" "freeStdFileObject" prim_freeStdFileObject :: FILE_OBJ -> IO ()
-foreign import stdcall "libHS_cbits.so" "const_BUFSIZ" const_BUFSIZ :: Int
-
-foreign import stdcall "libHS_cbits.so" "setConnNonBlockingIOFlag__" prim_setConnNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
-foreign import stdcall "libHS_cbits.so" "clearConnNonBlockingIOFlag__" prim_clearConnNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
-foreign import stdcall "libHS_cbits.so" "setNonBlockingIOFlag__" prim_setNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
-foreign import stdcall "libHS_cbits.so" "clearNonBlockingIOFlag__" prim_clearNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
-
-foreign import stdcall "libHS_cbits.so" "getErrStr__" prim_getErrStr__ :: IO Addr
-foreign import stdcall "libHS_cbits.so" "getErrNo__" prim_getErrNo__ :: IO Int
-foreign import stdcall "libHS_cbits.so" "getErrType__" prim_getErrType__ :: IO Int
+foreign import ccall "libHS_cbits.so" "setBuf" unsafe prim_setBuf :: FILE_OBJ -> Addr -> Int -> IO ()
+foreign import ccall "libHS_cbits.so" "getBufSize" unsafe prim_getBufSize :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "inputReady" unsafe prim_inputReady :: FILE_OBJ -> Int -> IO RC
+foreign import ccall "libHS_cbits.so" "fileGetc" unsafe prim_fileGetc :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "fileLookAhead" unsafe prim_fileLookAhead :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "readBlock" unsafe prim_readBlock :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "readLine" unsafe prim_readLine :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "readChar" unsafe prim_readChar :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "writeFileObject" unsafe prim_writeFileObject :: FILE_OBJ -> Int -> IO RC
+foreign import ccall "libHS_cbits.so" "filePutc" unsafe prim_filePutc :: FILE_OBJ -> Char -> IO RC
+foreign import ccall "libHS_cbits.so" "getBufStart" unsafe prim_getBufStart :: FILE_OBJ -> Int -> IO Addr
+foreign import ccall "libHS_cbits.so" "getWriteableBuf" unsafe prim_getWriteableBuf :: FILE_OBJ -> IO Addr
+foreign import ccall "libHS_cbits.so" "getBufWPtr" unsafe prim_getBufWPtr :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "setBufWPtr" unsafe prim_setBufWPtr :: FILE_OBJ -> Int -> IO ()
+foreign import ccall "libHS_cbits.so" "closeFile" unsafe prim_closeFile :: FILE_OBJ -> Flush -> IO RC
+foreign import ccall "libHS_cbits.so" "fileEOF" unsafe prim_fileEOF :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "setBuffering" unsafe prim_setBuffering :: FILE_OBJ -> Int -> IO RC
+foreign import ccall "libHS_cbits.so" "flushFile" unsafe prim_flushFile :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "flushConnectedBuf" unsafe prim_flushConnectedBuf :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "getBufferMode" unsafe prim_getBufferMode :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "seekFile_int64" unsafe prim_seekFile_int64 :: FILE_OBJ -> Int -> Int64 -> IO RC
+foreign import ccall "libHS_cbits.so" "seekFileP" unsafe prim_seekFileP :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "setTerminalEcho" unsafe prim_setTerminalEcho :: FILE_OBJ -> Int -> IO RC
+foreign import ccall "libHS_cbits.so" "getTerminalEcho" unsafe prim_getTerminalEcho :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "isTerminalDevice" unsafe prim_isTerminalDevice :: FILE_OBJ -> IO RC
+foreign import ccall "libHS_cbits.so" "setConnectedTo" unsafe prim_setConnectedTo :: FILE_OBJ -> FILE_OBJ -> Int -> IO ()
+foreign import ccall "libHS_cbits.so" "ungetChar" unsafe prim_ungetChar :: FILE_OBJ -> Char -> IO RC
+foreign import ccall "libHS_cbits.so" "readChunk" unsafe prim_readChunk :: FILE_OBJ -> Addr -> Int -> IO RC
+foreign import ccall "libHS_cbits.so" "writeBuf" unsafe prim_writeBuf :: FILE_OBJ -> Addr -> Int -> IO RC
+foreign import ccall "libHS_cbits.so" "getFileFd" unsafe prim_getFileFd :: FILE_OBJ -> IO FD
+foreign import ccall "libHS_cbits.so" "fileSize_int64" unsafe prim_fileSize_int64 :: FILE_OBJ -> Bytes -> IO RC
+foreign import ccall "libHS_cbits.so" "getFilePosn" unsafe prim_getFilePosn :: FILE_OBJ -> IO Int
+foreign import ccall "libHS_cbits.so" "setFilePosn" unsafe prim_setFilePosn :: FILE_OBJ -> Int -> IO Int
+foreign import ccall "libHS_cbits.so" "getConnFileFd" unsafe prim_getConnFileFd :: FILE_OBJ -> IO FD
+foreign import ccall "libHS_cbits.so" "allocMemory__" unsafe prim_allocMemory__ :: Int -> IO Addr
+foreign import ccall "libHS_cbits.so" "getLock" unsafe prim_getLock :: FD -> Exclusive -> IO RC
+foreign import ccall "libHS_cbits.so" "openStdFile" unsafe prim_openStdFile :: FD -> OpenStdFlags -> Readable -> IO IOFileAddr
+foreign import ccall "libHS_cbits.so" "openFile" unsafe prim_openFile :: CString -> How -> Binary -> OpenFlags -> IO IOFileAddr
+foreign import ccall "libHS_cbits.so" "freeFileObject" unsafe prim_freeFileObject :: FILE_OBJ -> IO ()
+foreign import ccall "libHS_cbits.so" "freeStdFileObject" unsafe prim_freeStdFileObject :: FILE_OBJ -> IO ()
+foreign import ccall "libHS_cbits.so" "const_BUFSIZ" unsafe const_BUFSIZ :: Int
+
+foreign import ccall "libHS_cbits.so" "setConnNonBlockingIOFlag__" unsafe prim_setConnNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
+foreign import ccall "libHS_cbits.so" "clearConnNonBlockingIOFlag__" unsafe prim_clearConnNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
+foreign import ccall "libHS_cbits.so" "setNonBlockingIOFlag__" unsafe prim_setNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
+foreign import ccall "libHS_cbits.so" "clearNonBlockingIOFlag__" unsafe prim_clearNonBlockingIOFlag__ :: FILE_OBJ -> IO ()
+
+foreign import ccall "libHS_cbits.so" "getErrStr__" unsafe prim_getErrStr__ :: IO Addr
+foreign import ccall "libHS_cbits.so" "getErrNo__" unsafe prim_getErrNo__ :: IO Int
+foreign import ccall "libHS_cbits.so" "getErrType__" unsafe prim_getErrType__ :: IO Int
#endif
\end{code}
projects / ghc-hetmet.git / blobdiff