[project @ 2005-01-28 13:36:25 by simonmar]

[ghc-base.git] / System / CPUTime.hsc

diff --git a/System/CPUTime.hsc b/System/CPUTime.hsc
index 0ce703e..603afce 100644 (file)
--- a/System/CPUTime.hsc
+++ b/System/CPUTime.hsc
@@ -2,7 +2,7 @@
 -- |
 -- Module      :  System.CPUTime
 -- Copyright   :  (c) The University of Glasgow 2001
--- License     :  BSD-style (see the file libraries/core/LICENSE)
+-- License     :  BSD-style (see the file libraries/base/LICENSE)
 -- 
 -- Maintainer  :  libraries@haskell.org
 -- Stability   :  provisional
@@ -26,6 +26,10 @@ import Data.Ratio
 import Hugs.Time ( getCPUTime, clockTicks )
 #endif
 
+#ifdef __NHC__
+import CPUTime ( getCPUTime, cpuTimePrecision )
+#endif
+
 #ifdef __GLASGOW_HASKELL__
 import Foreign
 import Foreign.C
@@ -42,7 +46,7 @@ import Foreign.C
 getCPUTime :: IO Integer
 getCPUTime = do
 
-#if !defined(mingw32_TARGET_OS) && !defined(cygwin32_TARGET_OS)
+#if !defined(mingw32_HOST_OS) && !defined(cygwin32_HOST_OS)
 -- getrusage() is right royal pain to deal with when targetting multiple
 -- versions of Solaris, since some versions supply it in libc (2.3 and 2.5),
 -- while 2.4 has got it in libucb (I wouldn't be too surprised if it was back
@@ -50,7 +54,7 @@ getCPUTime = do
 --
 -- Avoid the problem by resorting to times() instead.
 --
-#if defined(HAVE_GETRUSAGE) && ! irix_TARGET_OS && ! solaris2_TARGET_OS
+#if defined(HAVE_GETRUSAGE) && ! irix_HOST_OS && ! solaris2_HOST_OS
     allocaBytes (#const sizeof(struct rusage)) $ \ p_rusage -> do
     getrusage (#const RUSAGE_SELF) p_rusage
 
@@ -60,9 +64,9 @@ getCPUTime = do
     u_usec <- (#peek struct timeval,tv_usec) ru_utime :: IO CTime
     s_sec  <- (#peek struct timeval,tv_sec)  ru_stime :: IO CTime
     s_usec <- (#peek struct timeval,tv_usec) ru_stime :: IO CTime
-
-    return ((fromIntegral u_sec * 1000000 + fromIntegral u_usec + 
-             fromIntegral s_sec * 1000000 + fromIntegral s_usec) 
+    let realToInteger = round . realToFrac :: Real a => a -> Integer
+    return ((realToInteger u_sec * 1000000 + realToInteger u_usec + 
+             realToInteger s_sec * 1000000 + realToInteger s_usec) 
                * 1000000)
 
 type CRUsage = ()
@@ -73,7 +77,8 @@ foreign import ccall unsafe getrusage :: CInt -> Ptr CRUsage -> IO CInt
     times p_tms
     u_ticks  <- (#peek struct tms,tms_utime) p_tms :: IO CClock
     s_ticks  <- (#peek struct tms,tms_stime) p_tms :: IO CClock
-    return (( (fromIntegral u_ticks + fromIntegral s_ticks) * 1000000000000) 
+    let realToInteger = round . realToFrac :: Real a => a -> Integer
+    return (( (realToInteger u_ticks + realToInteger s_ticks) * 1000000000000) 
                        `div` fromIntegral clockTicks)
 
 type CTms = ()
@@ -125,8 +130,10 @@ foreign import ccall unsafe "GetProcessTimes" getProcessTimes :: Ptr HANDLE -> P
 -- in CPU time that the implementation can record, and is given as an
 -- integral number of picoseconds.
 
+#ifndef __NHC__
 cpuTimePrecision :: Integer
 cpuTimePrecision = round ((1000000000000::Integer) % fromIntegral (clockTicks))
+#endif
 
 #ifdef __GLASGOW_HASKELL__
 clockTicks :: Int