Using a semaphore class in C++

I found some code online that defines a semaphore class for C++:

#include <mutex>
#include <condition_variable>
#include <atomic>

using namespace std;

class Semaphore {
    public:
    Semaphore(int count_ = 0) : count(count_) {}

    inline void notify()
    {
        unique_lock<mutex> lock(mtx);
        count++;
        cv.notify_one();
    }

    inline void wait()
    {
        unique_lock<mutex> lock(mtx);

        while (count == 0) {
            cv.wait(lock);
        }
        count--;
    }

private:
    mutex mtx;
    condition_variable cv;
    atomic<int> count;
};

Imagine I have 10 threads and 2 of them can "work" simultaneously. How would I write this in my main, making use of the above defined class? I would like some short illustrative example. I'm aware, that this definition is a weak semaphore, since some of the threads will starve others.