Call API at Exit?

Question

I'm using an API that has a 'bind' function that I call at the start of my program, but to be a good API user, I need to call the 'unbind' function when my program quits for any reason. Is there a way to do that? I can't find anything on Google, and defer api.Unbind() doesn't seem to get called. Thx.

Answer 1

There is no single way to get a 100% guarantee that some code is called before abnormal program termination. The closest you can get is to react to os.Interrupt (and also syscall.SIGTERM on Unix systems) and make sure your cleanup is done thereafter. A good way to achieve this is to use NotifyContext because it ties in nicely with the context package the main use of which is to allow for implementing cancellation of (potentially) long-running code.