-----------------------------------------------------------------------------
module System.CPUTime
- (
+ (
getCPUTime, -- :: IO Integer
- cpuTimePrecision -- :: Integer
+ cpuTimePrecision -- :: Integer
) where
import Prelude
#endif
#ifdef __GLASGOW_HASKELL__
-import Foreign
+import Foreign hiding (unsafePerformIO)
import Foreign.C
+#if !defined(CLK_TCK)
+import System.IO.Unsafe (unsafePerformIO)
+#endif
+
+#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
+
+-- 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
-#include "HsBase.h"
+#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__
--
#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_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
- let realToInteger = round . realToFrac :: Real a => a -> Integer
return ((realToInteger u_sec * 1000000 + realToInteger u_usec +
realToInteger s_sec * 1000000 + realToInteger s_usec)
- * 1000000)
+ * 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
- let realToInteger = round . realToFrac :: Real a => a -> Integer
return (( (realToInteger u_ticks + realToInteger s_ticks) * 1000000000000)
- `div` fromIntegral clockTicks)
+ `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
return (ut + kt)
else return 0
where
- ft2psecs :: Ptr FILETIME -> IO Integer
+ ft2psecs :: Ptr FILETIME -> IO Integer
ft2psecs ft = do
- high <- (#peek FILETIME,dwHighDateTime) ft :: IO CLong
- low <- (#peek FILETIME,dwLowDateTime) ft :: IO CLong
- -- Convert 100-ns units to picosecs (10^-12)
- -- => multiply by 10^5.
- return (((fromIntegral high) * (2^32) + (fromIntegral low)) * 100000)
+ 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.