/**

 * Copyright 1993-2013 NVIDIA Corporation.  All rights reserved.

 *

 * Please refer to the NVIDIA end user license agreement (EULA) associated

 * with this source code for terms and conditions that govern your use of

 * this software. Any use, reproduction, disclosure, or distribution of

 * this software and related documentation outside the terms of the EULA

 * is strictly prohibited.

 *

 */

#ifndef TIMER_H

#define TIMER_H

#include <stdlib.h>

#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#else

#include <sys/time.h>

#endif

#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)

double PCFreq = 0.0;

__int64 timerStart = 0;

#else

struct timeval timerStart;

#endif

void StartTimer()

{

#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)

    LARGE_INTEGER li;

    if (!QueryPerformanceFrequency(&li))

    {

        printf("QueryPerformanceFrequency failed!\n");

    }

    PCFreq = (double)li.QuadPart/1000.0;

    QueryPerformanceCounter(&li;;

    timerStart = li.QuadPart;

#else

    gettimeofday(&timerStart, NULL);

#endif

}

// time elapsed in ms

double GetTimer()

{

#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)

    LARGE_INTEGER li;

    QueryPerformanceCounter(&li;;

    return (double)(li.QuadPart-timerStart)/PCFreq;

#else

    struct timeval timerStop, timerElapsed;

    gettimeofday(&timerStop, NULL);

    timersub(&timerStop, &timerStart, &timerElapsed);

    return timerElapsed.tv_sec*1000.0+timerElapsed.tv_usec/1000.0;

#endif

}

#endif // TIMER_H