spinlock.h

#include <atomic>

class SpinLock
{
    public:
        void lock()
        {
            while(lck.test_and_set(std::memory_order_acquire))
            {}
        }

        void unlock()
        {
            lck.clear(std::memory_order_release);
        }

    private:
        std::atomic_flag lck = ATOMIC_FLAG_INIT;
};