How do I use the join function in the pthreads library?

How do I use the join function in the pthreads library?

The join function in the pthreads library is used to wait for a thread to finish its execution. You can call it like this: pthread_join(thread_id, NULL); where thread_id is the identifier of the thread you want to join.

What happens if I don't use join?

If you don't use join, the main thread may terminate before the child thread finishes executing, leading to resource leaks or incomplete operations.

Can I join multiple threads?

Yes, you can join multiple threads by calling pthread_join for each thread you want to wait for, ensuring they all complete before proceeding.

Are there any errors I should watch out for when using join?

Yes, you should check for errors like ESRCH if the thread ID is invalid, or EINVAL if the thread is not joinable.