Thanks for the example easco.
While perhaps academic, it reminds me of rails ActiveRecord scopes ... which
are not so academic (and working on a finite set of data of course, but there
are similarities).
Ernie is correct: a GCD setup could mimic exactly what one wants to do in this
case ... but, very important: has the hope of centralizing control over actual
concurrency, which means the entire system as a whole is most likely (or has
the hope of being) better off.
... which leads us back to the sticky point: the code would be different, and
would require a rewrite. However, I am still leaning towards: this is a small
portion of [any] code, perhaps not unlike the modifications one must do moving
from
Ruby 1.8 + scripting bridge => MacRuby
-Daniel
On Fri, 13 Aug 2010 10:15:35 -0700
"Ernest N. Prabhakar, Ph.D." <prabh...@apple.com> wrote:
Hi Easco,
On Aug 13, 2010, at 8:15 AM, easco wrote:
Instead I was curious to know if there was "a plan" for implementing Fibers
and if so, I was curious to know what operating system technology they would
be built on. It appears that the problem has not been looked at, in-depth,
yet and I am satisfied with that. Nor does it appear that there is any OS
level technology that would particularly support the creation of Fibers (i.e.
Mac OS X doesn't really have any built-in support for cooperatively scheduled
multitasking... outside of deprecated technologies like the Carbon Thread
Manager and makecontext/swapcontext).
Actually, I'm confused by that statement. My understanding is that
cooperatively scheduled threads is a just a subset of the system-scheduled
model.
In particular, I'm pretty sure you can emulate them on top of GCD using
semaphores. Should I explain further, or did you already consider that and
discover it was unworkable?
-- Ernie P.
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