Spinlock implementation in Java (https://en.wikipedia.org/wiki/Spinlock)

SpinLock.java

public class SpinLock { 
 
    private AtomicReference<Thread> owner = new AtomicReference<Thread>(); 
 
    public void lock() { 
        Thread thread = Thread.currentThread(); 
        while (!owner.compareAndSet(null, thread)) { 
        } 
    } 
 
    public void unlock() { 
        Thread thread = Thread.currentThread(); 
        owner.compareAndSet(thread, null); 
    } 
 
}