How do I implement semaphores in my code?

How do I implement semaphores in my code?

To implement semaphores, you can use libraries like threading in Python. Would you like a code example?

Yes, please provide a code example.

Here's a simple example in Python:

import threading
import time

# Create a semaphore with a limit of 2
semaphore = threading.Semaphore(2)

def worker(num):
    print(f'Worker {num} is trying to acquire the semaphore.')
    with semaphore:
        print(f'Worker {num} has acquired the semaphore.')
        time.sleep(2)  # Simulate work
    print(f'Worker {num} has released the semaphore.')

# Create multiple threads
threads = [threading.Thread(target=worker, args=(i,)) for i in range(5)]

# Start the threads
for thread in threads:
    thread.start()

# Wait for all threads to complete
for thread in threads:
    thread.join()

What does the semaphore limit mean in this example?

The semaphore limit of 2 means that only two threads can access the critical section of code at the same time.