+++ /dev/null
-/* $Id$
- *
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS kernel
- * FILE: ntoskrnl/hal/x86/perfcnt.c
- * PURPOSE: Performance counter functions
- * PROGRAMMER: David Welch (welch@mcmail.com)
- * Eric Kohl (ekohl@rz-online.de)
- * UPDATE HISTORY:
- * 09/06/2000: Created
- */
-
-
-/* INCLUDES ***************************************************************/
-
-#include <ddk/ntddk.h>
-
-/* FUNCTIONS **************************************************************/
-
-
-VOID STDCALL
-HalCalibratePerformanceCounter(ULONG Count)
-{
- ULONG i;
-
- /* save flags and disable interrupts */
- __asm__("pushf\n\t" \
- "cli\n\t");
-
- for (i = 0; i < Count; i++);
-
- /* restore flags */
- __asm__("popf\n\t");
-}
-
-
-LARGE_INTEGER STDCALL
-KeQueryPerformanceCounter(PLARGE_INTEGER PerformanceFreq)
-/*
- * FUNCTION: Queries the finest grained running count avaiable in the system
- * ARGUMENTS:
- * PerformanceFreq (OUT) = The routine stores the number of
- * performance counters tick per second here
- * RETURNS: The performance counter value in HERTZ
- * NOTE: Returns the system tick count or the time-stamp on the pentium
- */
-{
- if (PerformanceFreq != NULL)
- {
- PerformanceFreq->QuadPart = 0;
- return *PerformanceFreq;
- }
- else
- {
- LARGE_INTEGER Value;
-
- Value.QuadPart = 0;
- return Value;
- }
-}
-
-/* EOF */