How to get the current task's ID?

[Kazurin-775]

I had a case where the wakers of some tasks were lost during the processing of some incoming connections. Now I'm stuck on debugging, since I cannot identify which handler is faulty (all of the tasks have the same spawn_location). Is it possible to know the current task's ID in the code, so that I can use it for diagnostics?

I don't think my case is similar to #120, since I cannot spawn a new task for every incoming connection due to the fact that my handlers are not 'static.