C++ Tick timer

[CppCoder2010]

Since you are using Windows, you can use the performance counter.

#include <windows.h>
#include <iostream>

unsigned long long GetPerformanceTicks();
unsigned long long GetPerformanceTicksInSecond();
double GetTickSeconds(unsigned long long nTicks,unsigned long long nFreq);
unsigned long long GetTickMilliseconds(unsigned long long nTicks,unsigned long long nFreq);
unsigned long long GetTickMicroseconds(unsigned long long nTicks,unsigned long long nFreq);

int main(int argc,char * argv)
{
    unsigned long long nFreq = GetPerformanceTicksInSecond();
    unsigned long long nBefore = GetPerformanceTicks();

    CallSomeFunction();

    unsigned long long nAfter = GetPerformanceTicks();

    const unsigned long long nDiff = nAfter - nBefore;

    const unsigned long long nMicroseconds = GetTickMicroseconds(nTicks,nFreq);

    std::cout << "CallSomeFunction() took" << nMicroseconds << std::endl;

    return 0;
}

unsigned long long GetPerformanceTicks()
{
    LARGE_INTEGER nValue;

    ::QueryPerformanceCounter(&nValue);

    return nValue.QuadPart;
}

unsigned long long GetPerformanceTicksInSecond()
{
    LARGE_INTEGER nFreq;

    ::QueryPerformanceFrequency(&nFreq);

    return nFreq.QuadPart;
}

double GetTickSeconds(unsigned long long nTicks,unsigned long long nFreq)
{
    return static_cast<double>(nTicks) / static_cast<double>(nFreq);
}

unsigned long long GetTickMilliseconds(unsigned long long nTicks,unsigned long long nFreq)
{
    unsigned long long nTicksInMillisecond = nFreq / 1000;

    return nTicks / nTicksInMillisecond;
}

unsigned long long GetTickMicroseconds(unsigned long long nTicks,unsigned long long nFreq)
{
    unsigned long long nTicksInMicrosecond = nFreq / 1000000;

    return nTicks / nTicksInMicrosecond;
}