+{-# LANGUAGE CPP, NondecreasingIndentation, ForeignFunctionInterface #-}
+
-----------------------------------------------------------------------------
-- |
-- 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
-----------------------------------------------------------------------------
module System.CPUTime
- (
+ (
getCPUTime, -- :: IO Integer
- cpuTimePrecision -- :: Integer
+ cpuTimePrecision -- :: Integer
) where
import Prelude
-import Foreign
+import Data.Ratio
+
+#ifdef __HUGS__
+import Hugs.Time ( getCPUTime, clockTicks )
+#endif
+
+#ifdef __NHC__
+import CPUTime ( getCPUTime, cpuTimePrecision )
+#endif
+
+#ifdef __GLASGOW_HASKELL__
+import Foreign hiding (unsafePerformIO)
import Foreign.C
+#if !defined(CLK_TCK)
+import System.IO.Unsafe (unsafePerformIO)
+#endif
-import Data.Ratio
+#include "HsBaseConfig.h"
+
+-- For _SC_CLK_TCK
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+-- For struct rusage
+#if !defined(mingw32_HOST_OS) && !defined(irix_HOST_OS)
+# if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+# endif
+#endif
-#include "HsBase.h"
+-- For FILETIME etc. on Windows
+#if HAVE_WINDOWS_H
+#include <windows.h>
+#endif
+-- for CLK_TCK
+#if HAVE_TIME_H
+#include <time.h>
+#endif
+
+-- for struct tms
+#if HAVE_SYS_TIMES_H
+#include <sys/times.h>
+#endif
+
+#endif
+
+#if !defined(mingw32_HOST_OS) && !defined(cygwin32_HOST_OS)
+realToInteger :: Real a => a -> Integer
+realToInteger ct = round (realToFrac ct :: Double)
+ -- CTime, CClock, CUShort etc are in Real but not Fractional,
+ -- so we must convert to Double before we can round it
+#endif
+
+#ifdef __GLASGOW_HASKELL__
-- -----------------------------------------------------------------------------
--- Computation `getCPUTime' returns the number of picoseconds CPU time
+-- |Computation 'getCPUTime' returns the number of picoseconds CPU time
-- used by the current program. The precision of this result is
-- implementation-dependent.
--- The `cpuTimePrecision' constant is the smallest measurable difference
--- in CPU time that the implementation can record, and is given as an
--- integral number of picoseconds.
-
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
--
-- 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
+ throwErrnoIfMinus1_ "getrusage" $ getrusage (#const RUSAGE_SELF) p_rusage
let ru_utime = (#ptr struct rusage, ru_utime) p_rusage
let ru_stime = (#ptr struct rusage, ru_stime) p_rusage
u_sec <- (#peek struct timeval,tv_sec) ru_utime :: IO CTime
- u_usec <- (#peek struct timeval,tv_usec) ru_utime :: IO CTime
+ u_usec <- (#peek struct timeval,tv_usec) ru_utime :: IO CSUSeconds
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)
- * 1000000)
+ s_usec <- (#peek struct timeval,tv_usec) ru_stime :: IO CSUSeconds
+ return ((realToInteger u_sec * 1000000 + realToInteger u_usec +
+ realToInteger s_sec * 1000000 + realToInteger s_usec)
+ * 1000000)
type CRUsage = ()
foreign import ccall unsafe getrusage :: CInt -> Ptr CRUsage -> IO CInt
#else
# if defined(HAVE_TIMES)
allocaBytes (#const sizeof(struct tms)) $ \ p_tms -> do
- times p_tms
+ _ <- 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)
- `div` fromIntegral clockTicks)
+ return (( (realToInteger u_ticks + realToInteger s_ticks) * 1000000000000)
+ `div` fromIntegral clockTicks)
type CTms = ()
foreign import ccall unsafe times :: Ptr CTms -> IO CClock
# else
ioException (IOError Nothing UnsupportedOperation
- "getCPUTime"
- "can't get CPU time"
- Nothing)
+ "getCPUTime"
+ "can't get CPU time"
+ Nothing)
# endif
#endif
#else /* win32 */
+ -- NOTE: GetProcessTimes() is only supported on NT-based OSes.
+ -- The counts reported by GetProcessTimes() are in 100-ns (10^-7) units.
allocaBytes (#const sizeof(FILETIME)) $ \ p_creationTime -> do
allocaBytes (#const sizeof(FILETIME)) $ \ p_exitTime -> do
allocaBytes (#const sizeof(FILETIME)) $ \ p_kernelTime -> do
if toBool ok then do
ut <- ft2psecs p_userTime
kt <- ft2psecs p_kernelTime
- return (fromIntegral (ut + kt))
+ return (ut + kt)
else return 0
- where ft2psecs ft = do
- high <- (#peek FILETIME,dwHighDateTime) ft :: IO CLong
- low <- (#peek FILETIME,dwLowDateTime) ft :: IO CLong
- return (((fromIntegral high) * (2^32) + (fromIntegral low)) * 100000)
+ where
+ ft2psecs :: Ptr FILETIME -> IO Integer
+ ft2psecs ft = do
+ high <- (#peek FILETIME,dwHighDateTime) ft :: IO Word32
+ low <- (#peek FILETIME,dwLowDateTime) ft :: IO Word32
+ -- Convert 100-ns units to picosecs (10^-12)
+ -- => multiply by 10^5.
+ return (((fromIntegral high) * (2^(32::Int)) + (fromIntegral low)) * 100000)
-- ToDo: pin down elapsed times to just the OS thread(s) that
-- are evaluating/managing Haskell code.
type FILETIME = ()
type HANDLE = ()
-- need proper Haskell names (initial lower-case character)
-foreign import ccall unsafe "GetCurrentProcess" getCurrentProcess :: IO (Ptr HANDLE)
-foreign import ccall unsafe "GetProcessTimes" getProcessTimes :: Ptr HANDLE -> Ptr FILETIME -> Ptr FILETIME -> Ptr FILETIME -> Ptr FILETIME -> IO CInt
+foreign import stdcall unsafe "GetCurrentProcess" getCurrentProcess :: IO (Ptr HANDLE)
+foreign import stdcall unsafe "GetProcessTimes" getProcessTimes :: Ptr HANDLE -> Ptr FILETIME -> Ptr FILETIME -> Ptr FILETIME -> Ptr FILETIME -> IO CInt
#endif /* not _WIN32 */
+#endif /* __GLASGOW_HASKELL__ */
+-- |The 'cpuTimePrecision' constant is the smallest measurable difference
+-- 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
clockTicks =
#if defined(CLK_TCK)
unsafePerformIO (sysconf (#const _SC_CLK_TCK) >>= return . fromIntegral)
foreign import ccall unsafe sysconf :: CInt -> IO CLong
#endif
+#endif /* __GLASGOW_HASKELL__ */
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