From: williamkempf_at_[hidden]
Date: 2001-08-15 19:32:15
--- In boost_at_y..., "Alexander Terekhov" <terekhov_at_d...> wrote:
>
> > I note the clever semantics: this call would have to
> > throw an exception if the thread had been detached.
> > But there's no call to detach a thread, so it cannot happen:
> > threads are detached simply by not calling join.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> really? without ref.counting? i do not understand this.
> can you explain this?
Unfortunately, to implement this correctly on top of pthreads I think
we're going to have to ref-count. Not in the same manner as you do
with a thread_ref concept, but it's still going to need to be done.
The biggest problem I see to getting this right is in not knowing
precisely what POSIX defines as the result of calling join() on a
thread that's already been joined or detached. If it's undefined
behavior then I'm going to have problems with "adopted" threads.
We'll have to discuss what the appropriate design/implementation will
be in that case. Can you enlighten me on this issue?
Bill Kempf