mmdevapi: Prevent 64 bit overflow within a few days of audio device use. (try 2)

[Michael Stefaniuc]

Hello Joerg,

On 03/01/2013 10:22 AM, Joerg-Cyril.Hoehle at t-systems.com wrote:
> The idea to replace X * numerator / denominator
> by X / den * mul + remainder from euclidian division
> came from
> http://blog.airsource.co.uk/index.php/2010/03/15/quelle-heure-est-il/
> 
> M. Stefaniuc suggested an inline function. The MulDiv64 inline has the benefit
> of ensuring unsigned arithmetic, matching GetPosition UINT64 output.
My idea was to have the whole if else in an inline function.
But I see that even the whole functionality can move to a helper.
Something like this:

static inline ULONGLONG get_qpctime(void)
{
    LARGE_INTEGER stamp, freq;
    QueryPerformanceCounter(&stamp);
    QueryPerformanceFrequency(&freq);
    if(freq.QuadPart == 10000000)
        return stamp.QuadPart;
    else
        return stamp.QuadPart / freq.QuadPart * 10000000
                  + stamp.QuadPart % freq.QuadPart * 10000000 /
freq.QuadPart;
}

bye
	michael