How can I know that all child thread are gone out?

[Druzhinin Alexandr]

On 09.10.2012 22:44, Druzhinin Alexandr wrote:
> Hello
> I spawn several threads and now I need to know if they has finished
> their job. Before I do it by means of messages from child threads to the
> main one to inform about finishing. But I'm sure this isn't good enough,
> because a child thread may fail before sending the exit message to the
> main thread and the application will hang up. So I'd like to check from
> the main thread if child threads are gone away. How can I do it?

Oops, I've totally missed core.thread. I'll correct this.