-- Stability : provisional
-- Portability : portable
--
--- $Id: Time.hsc,v 1.2 2001/07/31 13:05:02 simonmar Exp $
+-- $Id: Time.hsc,v 1.3 2001/07/31 13:05:33 simonmar Exp $
--
-- The standard Time library.
--
toCalendarTime :: ClockTime -> IO CalendarTime
-toCalendarTime = clockToCalendarTime localtime False
+#if HAVE_LOCALTIME_R
+toCalendarTime = clockToCalendarTime_reentrant (throwAwayReturnPointer localtime_r) False
+#else
+toCalendarTime = clockToCalendarTime_static localtime False
+#endif
toUTCTime :: ClockTime -> CalendarTime
-toUTCTime = unsafePerformIO . clockToCalendarTime gmtime True
+#if HAVE_GMTIME_R
+toUTCTime = unsafePerformIO . clockToCalendarTime_reentrant (throwAwayReturnPointer gmtime_r) True
+#else
+toUTCTime = unsafePerformIO . clockToCalendarTime_static gmtime True
+#endif
--- ToDo: should be made thread safe, because localtime uses static storage,
--- or use the localtime_r version.
-clockToCalendarTime :: (Ptr CTime -> IO (Ptr CTm)) -> Bool -> ClockTime
+throwAwayReturnPointer :: (Ptr CTime -> Ptr CTm -> IO (Ptr CTm))
+ -> (Ptr CTime -> Ptr CTm -> IO ( ))
+throwAwayReturnPointer fun x y = fun x y >> return ()
+
+clockToCalendarTime_static :: (Ptr CTime -> IO (Ptr CTm)) -> Bool -> ClockTime
-> IO CalendarTime
-clockToCalendarTime fun is_utc (TOD secs psec) = do
+clockToCalendarTime_static fun is_utc (TOD secs psec) = do
+ putStrLn ("clockToCalendarTime: TOD " ++ show secs ++ " " ++ show psec)
withObject (fromIntegral secs :: CTime) $ \ p_timer -> do
+ case p_timer of Ptr addr -> putStrLn ("const time_t * = " ++ show (I## (addr2Int## addr)))
p_tm <- fun p_timer -- can't fail, according to POSIX
+ clockToCalendarTime_aux is_utc p_tm psec
+
+clockToCalendarTime_reentrant :: (Ptr CTime -> Ptr CTm -> IO ()) -> Bool -> ClockTime
+ -> IO CalendarTime
+clockToCalendarTime_reentrant fun is_utc (TOD secs psec) = do
+ withObject (fromIntegral secs :: CTime) $ \ p_timer -> do
+ allocaBytes (#const sizeof(struct tm)) $ \ p_tm -> do
+ fun p_timer p_tm
+ clockToCalendarTime_aux is_utc p_tm psec
+
+clockToCalendarTime_aux :: Bool -> Ptr CTm -> Integer -> IO CalendarTime
+clockToCalendarTime_aux is_utc p_tm psec = do
sec <- (#peek struct tm,tm_sec ) p_tm :: IO CInt
min <- (#peek struct tm,tm_min ) p_tm :: IO CInt
hour <- (#peek struct tm,tm_hour ) p_tm :: IO CInt
type CTm = () -- struct tm
-foreign import unsafe localtime :: Ptr CTime -> IO (Ptr CTm)
-foreign import unsafe gmtime :: Ptr CTime -> IO (Ptr CTm)
-foreign import unsafe mktime :: Ptr CTm -> IO CTime
-foreign import unsafe time :: Ptr CTime -> IO CTime
+#if HAVE_LOCALTIME_R
+foreign import unsafe localtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
+#else
+foreign import unsafe localtime :: Ptr CTime -> IO (Ptr CTm)
+#endif
+#if HAVE_GMTIME_R
+foreign import unsafe gmtime_r :: Ptr CTime -> Ptr CTm -> IO (Ptr CTm)
+#else
+foreign import unsafe gmtime :: Ptr CTime -> IO (Ptr CTm)
+#endif
+foreign import unsafe mktime :: Ptr CTm -> IO CTime
+foreign import unsafe time :: Ptr CTime -> IO CTime
#if HAVE_GETTIMEOFDAY
type CTimeVal = ()