It seems you want to change the API to (optionally) terminate. That’s always possible for some code. A lot of code has timeouts, and you could make a PR to JuMP, though I’m not sure if it’s wanted, too much overhead? [The user couldn’t add timeouts from the calling code (unless your calling code that korks a new Julia process).]
If it’s just a hack, to not take up resources (e.g. on a cluster), you can stop any process after some time, with the timeout command (I guess e.g. Windows might have similar, or could do in WSL2):
but you got me interested in knowing if you can stop some code from within the program, and my first thought was start it as a thread, and if there’s a way to time-limit it. That doesn’t seem to be the case in most languages, at least not Julia (safely, is it still possible, if you basically want to terminate after?) or C (likely possible in Elixir/Erlang, and Java?):