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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team 2005
*
* Machine-dependent time measurement functions
*
* ---------------------------------------------------------------------------*/
#include "Rts.h"
#include "GetTime.h"
#include <windows.h>
#ifdef HAVE_TIME_H
# include <time.h>
#endif
#define HNS_PER_SEC 10000000LL /* FILETIMES are in units of 100ns */
/* Convert FILETIMEs into secs */
static INLINE_ME Ticks
fileTimeToTicks(FILETIME ft)
{
Ticks t;
t = ((Ticks)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
t = (t * TICKS_PER_SECOND) / HNS_PER_SEC;
return t;
}
void
getProcessTimes(Ticks *user, Ticks *elapsed)
{
*user = getProcessCPUTime();
*elapsed = getProcessElapsedTime();
}
Ticks
getProcessCPUTime(void)
{
FILETIME creationTime, exitTime, userTime, kernelTime = {0,0};
if (!GetProcessTimes(GetCurrentProcess(), &creationTime,
&exitTime, &kernelTime, &userTime)) {
return 0;
}
return fileTimeToTicks(userTime);
}
// getProcessElapsedTime relies on QueryPerformanceFrequency
// which should be available on any Windows computer thay you
// would want to run Haskell on. Satnam Singh, 5 July 2010.
Ticks
getProcessElapsedTime(void)
{
// frequency represents the number of ticks per second
// used by the QueryPerformanceFrequency implementaiton
// and is represented by a 64-bit union type initially set to 0
// and updated just once (hence use of static).
static LARGE_INTEGER frequency = {.QuadPart = 0} ;
// system_time is a 64-bit union type used to represent the
// tick count returned by QueryPerformanceCounter
LARGE_INTEGER system_time ;
// If this is the first time we are calling getProcessElapsedTime
// then record the ticks per second used by QueryPerformanceCounter
if (frequency.QuadPart == 0) {
QueryPerformanceFrequency(&frequency);
}
// Get the tick count.
QueryPerformanceCounter(&system_time) ;
// Return the tick count as a millisecond value.
// Using double to compute the intermediate value, because a 64-bit
// int would overflow when multiplied by TICKS_PER_SECOND in about 81 days.
return (Ticks)((TICKS_PER_SECOND * (double)system_time.QuadPart) / (double)frequency.QuadPart) ;
}
Ticks
getThreadCPUTime(void)
{
FILETIME creationTime, exitTime, userTime, kernelTime = {0,0};
if (!GetThreadTimes(GetCurrentThread(), &creationTime,
&exitTime, &kernelTime, &userTime)) {
return 0;
}
return fileTimeToTicks(userTime);
}
nat
getPageFaults(void)
{
/* ToDo (on NT): better, get this via the performance data
that's stored in the registry. */
return 0;
}
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