Runtime/testcase/tstTime-3.cpp

	tstTime-3.cpp revision 677833bc953b6cb418c701facbdcf4aa18d6c44e
/* $Id$ */
/** @file
 * InnoTek Portable Runtime Testcase - Simple RTTime test.
 */

/*
 * Copyright (C) 2006 InnoTek Systemberatung GmbH
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License 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.
 *
 * If you received this file as part of a commercial VirtualBox
 * distribution, then only the terms of your commercial VirtualBox
 * license agreement apply instead of the previous paragraph.
 */

/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#ifdef __WIN__
# include <Windows.h>

#elif defined __L4__

#else /* posix */
# include <sys/time.h>
#endif

#include <iprt/time.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/runtime.h>
#include <iprt/thread.h>
#include <iprt/err.h>


DECLINLINE(uint64_t) OSNanoTS(void)
{
#ifdef __WIN__
    uint64_t u64; /* manual say larger integer, should be safe to assume it's the same. */
    GetSystemTimeAsFileTime((LPFILETIME)&u64);
    return u64 * 100;

#elif defined __L4__
    /** @todo fix a different timesource on l4. */
    return RTTimeNanoTS();

#else /* posix */

    struct timeval tv;
    gettimeofday(&tv, NULL);
    return (uint64_t)tv.tv_sec  * (uint64_t)(1000 * 1000 * 1000)
         + (uint64_t)(tv.tv_usec * 1000);
#endif
}


int main(int argc, char **argv)
{
    RTR3Init();

    if (argc <= 1)
    {
        RTPrintf("tstTime-3: usage: tstTime-3 <seconds> [seconds2 [..]]\n");
        return 1;
    }

    RTPrintf("tstTime-3: Testing difference between RTTimeNanoTS() and OS time...\n");

    for (int i = 1; i < argc; i++)
    {
        uint64_t cSeconds = 0;
        int rc = RTStrToUInt64Ex(argv[i], NULL, 0, &cSeconds);
        if (RT_FAILURE(rc))
        {
            RTPrintf("tstTime-3: Invalid argument %d: %s\n", i, argv[i]);
            return 1;
        }
        RTPrintf("tstTime-3: %d - %RU64 seconds period...\n", i, cSeconds);

        RTTimeNanoTS(); OSNanoTS(); RTThreadSleep(1);
        uint64_t u64RTStartTS = RTTimeNanoTS();
        uint64_t u64OSStartTS = OSNanoTS();

        RTThreadSleep(cSeconds * 1000);

        uint64_t u64RTElapsedTS = RTTimeNanoTS();
        uint64_t u64OSElapsedTS = OSNanoTS();
        u64RTElapsedTS -= u64RTStartTS;
        u64OSElapsedTS -= u64OSStartTS;

        RTPrintf("tstTime-3: %d -   RT: %16RU64 ns\n", i, u64RTElapsedTS);
        RTPrintf("tstTime-3: %d -   OS: %16RU64 ns\n", i, u64OSElapsedTS);
        RTPrintf("tstTime-3: %d - diff: %16RI64 ns\n", i, u64RTElapsedTS - u64OSElapsedTS);
    }

    return 0;
}