[Jprogramming] Asking "Are you still alive?"

[Raul Miller]

Yes, sdasync is nice, and I wish it was supported universally.

I think that the interpreter changes from j6 to j7 should allow
sdasync to be implemented in a cross platform fashion, though I do not
know if the ide implementations have that in mind or if each ide would
have to be modified to support it.

That said, when I was suggesting sockets, I was just suggesting
sockets for the need you had specified (and the subject line of this
email message) -- determining if the other process was alive.  Using
sdselect on non-blocking sockets seem like a good approach there.

-- 
Raul

On Mon, Jan 2, 2012 at 8:27 PM, Ian Clark <earthspotty at gmail.com> wrote:
> The first thing that strikes me is that sdasync does not work on my
> Mac (though everything else seems to). I see the line:
>
>   if. IFUNIX do. 'not implemented under Unix - please use sdselect'
> assert 0 end.
>
> ...which I take to mean that I'll have to call
> sdselect'' periodically to check for data waiting,
> as I'm doing with the mapped files. This is
> no problem for the task in-hand because the listening process is
> already running a duty cycle, and I can slot the sdselect in there.
>
> But it's a pity in general. The big attraction of sockets for
> me is to be able to have process A trigger a callback in
> process B.