Function random_pair

tests/BS_thread_pool_test.cpp:572–585

 */
template <typename T>
std::pair<T, T> random_pair(const T min, const T max)
{
    static std::random_device rand_device;
    static std::mt19937_64 twister(rand_device());
    std::uniform_int_distribution<T> dist(min, max);
    T first = dist(twister);
    T second;
    do
        second = dist(twister);
    while (second == first);
    if (second < first)
        return {second, first};
    return {first, second};
}

// ========================================
// Functions for detecting various features