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Re: Workers

From: Andrew Fedoniouk <news@terrainformatica.com>
Date: Sun, 20 Jul 2008 00:01:19 -0700
Message-ID: <4882E2BF.8070102@terrainformatica.com>
To: Ian Hickson <ian@hixie.ch>
CC: public-html@w3.org

Ian Hickson wrote:
> On Sat, 19 Jul 2008, Andrew Fedoniouk wrote:
>> Chapter:
>> http://www.whatwg.org/specs/web-workers/current-work/#processing
>> has following:
>> ....
>> #5 Let script's script execution context (and thus also global object) be
>> worker.
>> #6 Let script's script browsing context be owner browsing context.
>> #7 Let script's script document context be owner document.
>> ....
>> But[1] tells us that:
>> "A browsing context is a collection of one or more Document objects, and one
>> or more views."
>> Intention is to isolate Worker so it is not clear what #6 and #7 mean.
> They mean exactly what they say; Workers are "isolated" in a JavaScript 
> sense but this doesn't preclude them being associated with a particular 
> JavaScript browsing context.

Sorry but what exactly is that "browsing context"?
Is it set of objects, interfaces or just such a smell?

(For some reasons I found difficult for myself to understand
language used in http://www.whatwg.org/specs/web-workers/ ,sorry again)

>> Also it is not clear how method:
>> MessagePort createWorker(in DOMString scriptURL);
>> downloads that script. If it is an asynchronous operation then it should 
>> be some event. If it is synchronous operation than it should be some 
>> timeout or so defined.
> It is downloaded in step 1 of the "run a worker" algorithm.

Is it list item #1 in:
http://www.whatwg.org/specs/web-workers/current-work/#processing ?

If "yes" then for me it contains only this:

"Attempt to fetch the resource identified by url.
  If the attempt fails,....
  If the attempt succeeds, then ...."

Question is: how that Attempt is made exactly?
Synchronously or asynchronously?

Andrew Fedoniouk.

Received on Sunday, 20 July 2008 07:02:05 UTC

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