Commit 3790bb63 authored by rrt's avatar rrt
Browse files

[project @ 2001-05-29 11:38:14 by rrt]

Reimplement getCPUTime in Haskell for Windows.
parent 9e4bf486
-- -----------------------------------------------------------------------------
-- $Id: CPUTime.hsc,v 1.4 2001/05/21 14:04:15 simonmar Exp $
-- $Id: CPUTime.hsc,v 1.5 2001/05/29 11:38:14 rrt Exp $
--
-- (c) The University of Glasgow, 1995-2001
--
......@@ -11,6 +11,7 @@ module CPUTime
) where
import PrelMarshalAlloc
import PrelMarshalUtils ( toBool )
import PrelCTypesISO
import PrelCTypes
import PrelStorable
......@@ -81,50 +82,32 @@ foreign import unsafe times :: Ptr CTms -> CClock
#endif
#else /* _WIN32 */
#error ToDo!!!
#ifdef _WIN32
/* 100ns units per sec, really */
#define NS_PER_SEC 10000000LL
#define FT2usecs(ll,ft) \
(ll)=(ft).dwHighDateTime; \
(ll) <<= 32; \
(ll) |= (ft).dwLowDateTime;
#endif
/* cygwin32 or mingw32 version */
StgInt
getCPUTime(StgByteArray cpuStruct)
{
FILETIME creationTime, exitTime, kernelTime, userTime;
StgInt *cpu=(StgInt *)cpuStruct;
unsigned long long uT, kT;
/* ToDo: pin down elapsed times to just the OS thread(s) that
are evaluating/managing Haskell code.
*/
if (!GetProcessTimes (GetCurrentProcess(), &creationTime,
&exitTime, &kernelTime, &userTime)) {
/* Probably on a Win95 box..*/
cpu[0]=0;
cpu[1]=0;
cpu[2]=0;
cpu[3]=0;
return 1;
}
FT2usecs(uT, userTime);
FT2usecs(kT, kernelTime);
cpu[0] = (unsigned int)(uT / NS_PER_SEC);
cpu[1] = (unsigned int)((uT - cpu[0] * NS_PER_SEC) * 100);
cpu[2] = (unsigned int)(kT / NS_PER_SEC);
cpu[3] = (unsigned int)((kT - cpu[2] * NS_PER_SEC) * 100);
return 1;
}
#endif /* WIN32 */
allocaBytes (#const sizeof(FILETIME)) $ \ p_creationTime -> do
allocaBytes (#const sizeof(FILETIME)) $ \ p_exitTime -> do
allocaBytes (#const sizeof(FILETIME)) $ \ p_kernelTime -> do
allocaBytes (#const sizeof(FILETIME)) $ \ p_userTime -> do
pid <- getCurrentProcess
ok <- getProcessTimes pid p_creationTime p_exitTime p_kernelTime p_userTime
if toBool ok then do
ut <- ft2usecs p_userTime
kt <- ft2usecs p_kernelTime
return (fromIntegral (ut + kt))
else return 0
where ft2usecs ft = do
high <- (#peek FILETIME,dwHighDateTime) ft :: IO CLong
low <- (#peek FILETIME,dwLowDateTime) ft :: IO CLong
return (high * (2^32) + low)
-- 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 "GetCurrentProcess" unsafe getCurrentProcess :: IO (Ptr HANDLE)
foreign import "GetProcessTimes" unsafe getProcessTimes :: Ptr HANDLE -> Ptr FILETIME -> Ptr FILETIME -> Ptr FILETIME -> Ptr FILETIME -> IO CInt
#endif /* not _WIN32 */
cpuTimePrecision :: Integer
cpuTimePrecision = round ((1000000000000::Integer) % fromIntegral (clockTicks))
......
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