How do I implement a spinlock in Java?

How do I implement a spinlock in Java?

To implement a spinlock in Java, you can use a simple boolean flag and a loop to repeatedly check the flag.

Can you show me a code example?

Sure! Here's a basic implementation:

public class Spinlock {
    private volatile boolean locked = false;

    public void lock() {
        while (locked) {
            // Busy-wait
        }
        locked = true;
    }

    public void unlock() {
        locked = false;
    }
}

What are the pros and cons of using a spinlock?

Pros include low overhead and simplicity, while cons are potential CPU wastage and inefficiency under contention.

Are there any alternatives to spinlocks?

Yes, alternatives include mutexes, semaphores, and other synchronization mechanisms that may be more efficient.