OwnerTerminated graceful handling

[Eitan Frachtenberg]

On Oct 13, 2010, at 10:09 AM, Sean Kelly wrote:

> I'm not sure if you've read TDPL, but the basic idea is that if thread A spawns threads B and C, B and C should typically not outlive thread A.  Manual cleanup of spawned threads tends to be messy, so this functionality was built into the messaging system as the OwnerTerminated exception.  So currently, if a spawned thread should outlive its creator it should receive OwnerTerminated and ignore it.
> 
> I've added the beginnings of bidirectional linking as well via spawnLinked and the LinkTerminated exception, so monitor threads can be created to track the status of worker threads.  There is still a lot of functionality missing however.
> 

Yes, I have read TDPL. I suppose I don't really care about spawned worker threads outliving owner thread, as long as the owner has a clean way to signal to the worker that it should stop now.