C difference between main thread and other threads

Question

Is there a difference between the first thread and other threads created during runtime. Because I have a program where to abort longjmp is used and a thread should be able to terminate the program (exit or abort don't work in my case). Could I safely use pthread_kill_other_threads_np and then longjmp?

Answer 1

I'm not sure what platform you're talking about, but pthread_kill_other_threads_np is not a standard function and not a remotely reasonable operation anymore than free_all_malloced_memory would be. Process termination inherently involves the termination of all threads atomically with respect to each other (they don't see each other terminate).

As for longjmp , while there is nothing wrong with longjmp , you cannot use it to jump to a context in a different thread.

It sounds like you have an XY problem here; you've asked about whether you can use (or how to use) particular tools that are not the right tool for whatever it is you want, without actually explaining what your constraints are.