No, the second condition is not hardcoded, it's a user input. The use case is the following:
- Spawn thread A which reads data from a server.
- Check if the user passed a command line option.
- If the option was passed, then join thread A and check it's data against user input. It could conditionally exit the program and the rest of the main won't execute.
- If NO option was passed, do some other work in the main thread and later join the A thread and work with it.
Important note. If step 3 happened, and we didn't exit, the data from the thread must be of course available is in the scope of main, so in step 4 we should not join again.
So basically I want to allow the main thread to do some work until the data of thread A is needed.
Hope it helps to get the idea. 
