Continuations support?

Question

I was wondering if there are any plans to consider
continuation
support in flash/flex? ...predominantly to support the
concept of a
smarter "Thread.sleep(n)" without blocking or disrupting the
single-threaded execution model.
For context, here is a "sleep" pseudo-example how it might
look conceptually.
The example's meaningless result, and for loop are a weak
case to show how
these complicate/invalidate any use of setTimeout in the
current
flash/flex model.
function example():int {
trace("before");
int result = 0;
for (c:int=1; c<5; c++) {
sleep(1000);
result++;
trace("after 5 seconds");
function sleep(sleep_millis:int) {
var savepoint:Continuation = Continuations.new(); // creates
a
holder that will capture the execution stack state at the
next suspend()
setTimeout(function(event:Event):void {
Continuations.resume(savepoint); // resumes the
saved execution stack
},sleep_millis);
Continuations.suspend(savepoint);
For my purposes, I am writing a general-purpose tool for
developers
that would locate one or more components in the UI hierarchy
(by some
criteria), then return those components so they could
interact with them.
In searching for said components, I have come across embedded
SWFLoaders which are not yet finished loading/reloading, and
sleep()
(via continuations) would allow checking it's state
periodically and
not disrupt the execution stack, callers code or block the
overall
application.
From a runtime perspective, I assume there is an
"EventManager" and one event
thread that dispatches one event at a time off the queue.
Basically, if
Continuations were introduced, the current event thread
(Thread1) would
sleep() when Continuations.suspend(x) is called, but also
tell the
EventManager to create a new thread (Thread2) to continue
processing the event
queue. When Continuations.resume(x) is called, Thread2 would
halt while Thread1
resumes and finishes... then Thread2 would continue. So while
there are
physically 1+ threads present, only 1 is active at any given
time (managed
by the EventManager)
Comments?

Answer 1

I'm also interested in seeing Continuations in BEA Pageflows. We have been struggling with back button support for years. We have tried nested pageflows as well, but it is not a total solution across a web app or multiple web apps. Can somebody from BEA respond to this post?