fn os_date_t os_local_time_now(void) {
    os_date_t result = {0};
    SYSTEMTIME lt;
    GetLocalTime(&lt);
    result.ms = lt.wMilliseconds;
    result.sec = lt.wSecond;
    result.min = lt.wMinute;
    result.hour = lt.wHour;
    result.day = lt.wDay;
    result.month = lt.wMonth;
    result.year = lt.wYear;
    return result;
}

fn f64 os_seconds_now(void) {
    static int64_t counts_per_second;
    if (counts_per_second == 0) {
        LARGE_INTEGER freq;
        QueryPerformanceFrequency(&freq);
        counts_per_second = freq.QuadPart;
    }

    LARGE_INTEGER time;
    QueryPerformanceCounter(&time);
    f64 result = (f64)time.QuadPart / (f64)counts_per_second;
    return result;
}

fn f64 os_get_milliseconds(void) {
    f64 secs = os_seconds_now();
    f64 result = secs * 1000;
    return result;
}