Thanks you guys. The AsyncToken is what I was looking for *except* I need this for non-HTTPService loaders so unfortunately it doesn't work for me. I may have to try to roll my own similar solution.
Furthermore, I can't chain the calls. I've considered extending the event classes, but then I'd have to extend the loader classes and override the load method too so I can pass this custom data along. That seems far too crufty for me. Thanks again for the help anyways, -R --- In [email protected], "Tracy Spratt" <[EMAIL PROTECTED]> wrote: > > As you have shown it, you cannot rely on the value of the flag. > > > > Instead, use AsyncToken to keep calls sync'd with results. > > > > Hmm, I think AsyncToken is available on UrlLoader. If not, use > HTTPService. > > > > function load(flag:uint) { > var asToken:AsyncToken = loader.loadSomeStuff(); > > asToken.flag = flag; > } > > > > function handleComplete(event:Event) { > var asToken:AsyncToken = event.token; > > var sFlag:String = asToken.flag; > > switch (sFlag) { > > case"1": > > //do 1 stuff > > break; > > .... > > } > } > > > > Tracy > > ________________________________ > > From: [email protected] [mailto:[EMAIL PROTECTED] On > Behalf Of robbarreca > Sent: Monday, June 09, 2008 5:48 PM > To: [email protected] > Subject: [flexcoders] Re: Attaching custom data to events (while > avoiding race condition) > > > > So when I say "thread" maybe I'm using the wrong terminology. I'm not > actually talking about two different users/browsers. I'm talking about > the same browser running two calls of load(). > > Let me expand: > > function onInitialize() { > loader.addEventListener(handleComplete); > load(1); // Say this takes 20 seconds to complete load > load(2); // But this one only takes 5 seconds to complete > } > > private var storedFlag:uint = 0; > > function load(flag:uint) { > storedFlag = flag; > loader.loadSomeStuff(); > } > > function handleComplete(event:Event) { > // What is storedFlag here? > } > > The execution goes like this: > > load(1); > > load(2); > > handleComplete(event1); // Triggered from the load(1) which is the > race since this storedFlag == 2, but this is handling the completion > of the first load. I really want to get that flag data from the event > object so there is no race condition. > > handleComplete(event2); > > This is a simplified example, but I really do have a use case for > this. Did I do a better job of explaining this time? > > -R > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> > , "Daniel Gold" <danielggold@> wrote: > > > > It makes sense when dealing with concurrent programming, but Flash > is single > > threaded and you won't have a case where multiple threads are task > switching > > and simultaneously executing functions. Every function call and event > > handler in flex is basically "in-lined" and will execute to > completion. > > > > On Mon, Jun 9, 2008 at 5:11 PM, robbarreca <rob@> > > wrote: > > > > > Sorry, I must have not explained well. The race condition I'm > talking > > > about exists here: > > > > > > thread 1: calls load() and say someFlag gets set to 1; > > > thread 2: calls load() and someFlag is set to 2; > > > thread 1: the first load is complete and handleComplete() is called, > > > but someFlag is set to 2 when the value I want is 1. > > > > > > I want to attach a copy of the value of someFlag to the event so in > > > handleComplete() I could call event.target.someFlagCopy and always > get > > > the value that was set in *that* thread's load() call. > > > > > > Does that make any sense? > > > > > > -R > > > > > > > > > --- In [email protected] > <mailto:flexcoders%40yahoogroups.com> <flexcoders%40yahoogroups.com>, > "Daniel > > > Gold" <danielggold@> wrote: > > > > > > > > does determineFlag() do some asynch service call? If so you need > to > > > wait and > > > > raise an event or update a var in a model and listen for changes > > > that way. > > > > Otherwise your determineFlag() method will run to completion > before the > > > > loader.loadSomeStuff() line is executed, Flash is single threaded > > > for user > > > > code execution so you shouldn't have a race condition there > > > > > > > > On Mon, Jun 9, 2008 at 3:55 PM, robbarreca <rob@> > > > > wrote: > > > > > > > > > Say I have two functions load() and handleComplete(event:Event). > > > Right > > > > > now to get custom data to handleComplete I do something like > this > > > > > > > > > > private var someFlag:uint = 0; > > > > > > > > > > function load() { > > > > > loader.addEventListener(handleComplete); > > > > > someFlag = determineFlag(); > > > > > loader.loadSomeStuff(); > > > > > } > > > > > > > > > > function handleComplete(event:Event) { > > > > > trace(someFlag); > > > > > } > > > > > > > > > > But if I call this super fast, someFlag is gonna be wrong. > I've seen a > > > > > method where you can add an anonymous function somehow, but > I'm pretty > > > > > sure that even faced the same race condition problem. What is > the > > > > > *proper* way to go about this? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
