Daemon Threads

[Alex Rønne Petersen]

On 07-08-2012 21:38, Sean Kelly wrote:
> On Aug 7, 2012, at 9:36 AM, David <d at dav1d.de> wrote:
>
>> I have a threaded connection:
>> ...
>> Since this is a daemon thread, I'd expect it to stop/terminate when the main thread stops. This is not the case (it keeps running), is this a known bug and how can I workaround this?
>
> Daemon threads will keep running until the process terminates.  Forcibly halting them any earlier risks leaving mutexes they hold in a locked state, etc, which could break shutdown and hang the app.  Typically, you'll want to have a shared module dtor communicate to any daemon threads that it's time for them to halt, and block until a response is received if you want to ensure a clean shutdown.
>

Huh? From thread.di:

     /**
      * Gets the daemon status for this thread.  While the runtime will 
wait for
      * all normal threads to complete before tearing down the process, 
daemon
      * threads are effectively ignored and thus will not prevent the 
process
      * from terminating.  In effect, daemon threads will be terminated
      * automatically by the OS when the process exits.
      *
      * Returns:
      *  true if this is a daemon thread.
      */
     final @property bool isDaemon();

I'm confused... shouldn't daemon threads die when the main thread dies 
(which effectively exits the process)?

-- 
Alex Rønne Petersen
alex at lycus.org
http://lycus.org