On Fri, Sep 11, 2009 at 11:15 AM, Iruata Souza <iru.mu...@gmail.com> wrote:
> On Tue, Sep 8, 2009 at 1:40 PM, Bakul Shah
> <bakul+pl...@bitblocks.com<bakul%2bpl...@bitblocks.com>>
> wrote:
> > On Tue, 08 Sep 2009 08:31:28 PDT David Leimbach <leim...@gmail.com>
> wrote:
> >>
> >> Having wrestled with this stuff a little bit, and written "something".
> I
> >> can immediately see how one can get away from needing to "select" in
> code so
> >> much, and fire off blocks to handle client server interactions etc.
> It's
> >> kind of neat.
> >
> > alt(3) is a nicer way to avoid select().
> >
> > I still say CSP is the way to go. In plan9/limbo channels
> > work across coroutines in one process. Seems to me extending
> > channels to work across preemptive threads (running on
> > multiple cores) or across processes or machines is might lead
> > to a more elegant and no less performant model. It seems
> > to be a more natural model when you have zillions of
> > processors on a chip (like TileraPro64, with zillion = 64).
> > They can't all go to shared external memory without paying a
> > substantial cost but neighbor to neighbor communication is
> > far faster (tilera claims 37Tbps onchip interconnect b/w and
> > 50Gbps of I/O bw).
> >
> > It is nice that a Apple C block treats all non local
> > variables (except __block ones) as read only variables. But
> > every time I look at blocks I see new problems. What if a
> > block calls a function that modifies a global like in the
> > example below? If this works, what is the point of treating
> > globals as readonly? If this doesn't work, how do ensure
> > trash_x() causes a seg fault, particularly when it is defined
> > in another file?
> >
> > int x;
> >
> > void trash_x() { x = -42; }
> >
> > ... ^{ trash_x(); } ...
> >
> > My view: if you can't solve a problem cleanly and in a
> > general way with a feature, it does not belong in a language
> > (but may belong in a library).
> >
>
> for those who still care
> http://libdispatch.macosforge.org/
>
>
And the FreeBSD port is underway too. It's going to have the kernel
scheduling hints too it seems.
Dave
