What are some examples of deadlock-free code?

Can you provide some examples of deadlock-free code?

Sure! Deadlock-free code ensures that multiple threads can operate without getting stuck waiting for each other. One common example is using a lock hierarchy.

What is a lock hierarchy?

A lock hierarchy is a method where locks are acquired in a predefined order. This prevents circular wait conditions, which are a common cause of deadlocks.

Can you give me a code snippet demonstrating this?

Certainly! Here's a simple example in Python:

import threading

lock1 = threading.Lock()
lock2 = threading.Lock()

def thread1():
    with lock1:
        with lock2:
            print('Thread 1 acquired both locks')

def thread2():
    with lock1:
        with lock2:
            print('Thread 2 acquired both locks')

This code will run without deadlocks.

Are there other strategies to avoid deadlocks?

Yes, other strategies include using timeout locks, avoiding nested locks, and using try-lock mechanisms.