What is the difference between join and detach in C++ thread library?

What is the difference between join and detach in C++ thread library?

In C++, the join method blocks the calling thread until the thread represented by the object has finished executing, while detach allows the thread to run independently. After detaching, you cannot join the thread.

Can you give an example of when to use each?

Sure! Use join when you need the result of the thread's execution before proceeding, like in a calculation. Use detach when you want the thread to run in the background without needing to synchronize with it.

What happens if I forget to join or detach a thread?

If you forget to join or detach a thread, it can lead to a resource leak, as the thread will remain in a non-joinable state, and the program may terminate without cleaning up properly.

Are there any performance implications between join and detach?

Yes, using detach can improve performance in scenarios where you don't need to wait for the thread to finish, as it allows for concurrent execution without blocking.