| 1 | /* $Id: ntGetTimerResolution.cpp 2981 2007-06-01 16:01:28Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * innotek Portable Runtime - Win32 (NT) testcase for getting the timer resolution.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 innotek GmbH
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License as published by the Free Software Foundation,
|
|---|
| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * If you received this file as part of a commercial VirtualBox
|
|---|
| 18 | * distribution, then only the terms of your commercial VirtualBox
|
|---|
| 19 | * license agreement apply instead of the previous paragraph.
|
|---|
| 20 | */
|
|---|
| 21 |
|
|---|
| 22 |
|
|---|
| 23 | /*******************************************************************************
|
|---|
| 24 | * Header Files *
|
|---|
| 25 | *******************************************************************************/
|
|---|
| 26 | #define _WIN32_WINNT 0x0500
|
|---|
| 27 | #include <Windows.h>
|
|---|
| 28 | #include <stdio.h>
|
|---|
| 29 |
|
|---|
| 30 | extern "C" {
|
|---|
| 31 | /* from sysinternals. */
|
|---|
| 32 | NTSYSAPI LONG NTAPI NtQueryTimerResolution(OUT PULONG MinimumResolution, OUT PULONG MaximumResolution, OUT PULONG CurrentResolution);
|
|---|
| 33 | }
|
|---|
| 34 |
|
|---|
| 35 |
|
|---|
| 36 | int main()
|
|---|
| 37 | {
|
|---|
| 38 | ULONG Min = ~0;
|
|---|
| 39 | ULONG Max = ~0;
|
|---|
| 40 | ULONG Cur = ~0;
|
|---|
| 41 | NtQueryTimerResolution(&Min, &Max, &Cur);
|
|---|
| 42 | printf("NtQueryTimerResolution -> Min=%lu Max=%lu Cur=%lu (100ns)\n", Min, Max, Cur);
|
|---|
| 43 |
|
|---|
| 44 | #if 0
|
|---|
| 45 | /* figure out the 100ns relative to the 1970 epoc. */
|
|---|
| 46 | SYSTEMTIME st;
|
|---|
| 47 | st.wYear = 1970;
|
|---|
| 48 | st.wMonth = 1;
|
|---|
| 49 | st.wDayOfWeek = 4; /* Thor's day. */
|
|---|
| 50 | st.wDay = 1;
|
|---|
| 51 | st.wHour = 0;
|
|---|
| 52 | st.wMinute = 0;
|
|---|
| 53 | st.wSecond = 0;
|
|---|
| 54 | st.wMilliseconds = 0;
|
|---|
| 55 |
|
|---|
| 56 | FILETIME ft;
|
|---|
| 57 | if (SystemTimeToFileTime(&st, &ft))
|
|---|
| 58 | {
|
|---|
| 59 | printf("epoc is %I64u (0x%08x%08x)\n", ft, ft.dwHighDateTime, ft.dwLowDateTime);
|
|---|
| 60 | if (FileTimeToSystemTime(&ft, &st))
|
|---|
| 61 | printf("unix epoc: %d-%02d-%02d %02d:%02d:%02d.%03d (week day %d)\n",
|
|---|
| 62 | st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, st.wDayOfWeek);
|
|---|
| 63 | else
|
|---|
| 64 | printf("FileTimeToSystemTime failed, lasterr=%d\n", GetLastError());
|
|---|
| 65 | }
|
|---|
| 66 | else
|
|---|
| 67 | printf("SystemTimeToFileTime failed, lasterr=%d\n", GetLastError());
|
|---|
| 68 |
|
|---|
| 69 | ft.dwHighDateTime = 0;
|
|---|
| 70 | ft.dwLowDateTime = 0;
|
|---|
| 71 | if (FileTimeToSystemTime(&ft, &st))
|
|---|
| 72 | printf("nt time start: %d-%02d-%02d %02d:%02d:%02d.%03d (week day %d)\n",
|
|---|
| 73 | st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, st.wDayOfWeek);
|
|---|
| 74 | else
|
|---|
| 75 | printf("FileTimeToSystemTime failed, lasterr=%d\n", GetLastError());
|
|---|
| 76 | #endif
|
|---|
| 77 | return 0;
|
|---|
| 78 | }
|
|---|
| 79 |
|
|---|
