ntGetTimerResolution.cpp revision c79c303497a57afc0535a62cfb1199f562f0c382
/* $Id$ */
/** @file
* IPRT - Win32 (NT) testcase for getting the timer resolution.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define _WIN32_WINNT 0x0500
#include <Windows.h>
#include <stdio.h>
extern "C" {
/* from sysinternals. */
NTSYSAPI LONG NTAPI NtQueryTimerResolution(OUT PULONG MaximumResolution, OUT PULONG MinimumResolution, OUT PULONG CurrentResolution);
}
int main()
{
printf("NtQueryTimerResolution -> Max=%08luns Min=%08luns Cur=%08luns\n", Min * 100, Max * 100, Cur * 100);
#if 0
/* figure out the 100ns relative to the 1970 epoc. */
st.wMilliseconds = 0;
{
printf("unix epoc: %d-%02d-%02d %02d:%02d:%02d.%03d (week day %d)\n",
else
}
else
ft.dwHighDateTime = 0;
ft.dwLowDateTime = 0;
printf("nt time start: %d-%02d-%02d %02d:%02d:%02d.%03d (week day %d)\n",
else
#endif
return 0;
}