2 * reactos performance counters emulation of libcaptive
3 * Copyright (C) 2002 Jan Kratochvil <project-captive@jankratochvil.net>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; exactly version 2 of June 1991 is required
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "reactos/ddk/kefuncs.h" /* self */
24 #include <glib/gmessages.h>
28 * KeQueryPerformanceCounter:
29 * @PerformanceFreq: Optionally returns the number of ticks per second.
30 * %NULL value is permitted.
32 * Reports the current system-wide timer value.
34 * Returns: Current system timer ticks count with unspecified base.
35 * You will want to subtract two such values to get some timing result.
36 * libcaptive must return #gint64 instead of the official #LARGE_INTEGER
37 * as W32 expects it as value in EAX:EDX but GCC returns the structure address in EAX.
39 gint64 /* instead of LARGE_INTEGER */ KeQueryPerformanceCounter(PLARGE_INTEGER PerformanceFreq)
50 r.QuadPart=((guint64)tv.tv_sec)*1000000+tv.tv_usec;
53 PerformanceFreq->QuadPart=1000000;