Re: [webkit-dev] parallel controls in JavaScriptCore engine

2010-06-28 Thread Geoffrey Garen 
> So my question here is, is this really possible to stop execution at one 
> place and execute some thing else and resume back to previous execution point 
> with JavaScript engine of Webkit.

Yes.

> I have tried this using two threads by blocking the wait using mutex and 
> calling success/failure callback using another thread but it app crashing.

You'll need to provide more information in order to get help. Did you debug the 
crash? What did you find?

Though JavaScriptCore is threadsafe, WebKit is not.

Geoff
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Re: [webkit-dev] parallel controls in JavaScriptCore engine

2010-06-28 Thread Zoltan Herczeg 
Hi,

why don't you simply use a workaround?


 function success()
 {
alert("Success");
continueTask(true);
 }

 function failure()
 {
alert("Failure");
continueTask(false);
 }

 function continueTask(success)
 {
  x= 10+1;
 }


Zoltan

> Hello,
>
> As part of my project, we need to implement custom JS objects using
> JavaScriptCore API.
> I am seeking help in implementing in implementing one of the requirement
> and
> its possibility of accomplishing it in Webkit/JavaScriptcore.
> So, the requirement is, We need to add custom JS object , lets say
> "MyObject" and this object has one method wait() which should block the
> control until its previously requested operation completes.
>
> in Detail,
> *
> 
> function success()
> {
>alert("Success");
> }
>
> function failure()
> {
>alert("Failure");
> }
>
> MyObject.postMessage(success,failure,"hello, How r u?");
> MyObject.wait();
> x= 10+1;
> *
>
> Here, MyObject.wait() should resume only after either of its success or
> failure callback is executed. The statement "x=10+1" would be executed
> only
> after either success or failure callback invoked.
>
> So my question here is, is this really possible to stop execution at one
> place and execute some thing else and resume back to previous execution
> point with JavaScript engine of Webkit.
>
> I have tried this using two threads by blocking the wait using mutex and
> calling success/failure callback using another thread but it app crashing.
>
> Can you please suggest me what are the possible ways to achieve the above
> requirement.
>
>
> Thanks
> Srinu
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Re: [webkit-dev] parallel controls in JavaScriptCore engine

2010-06-28 Thread Adam Barth 
I'm not sure if there's a short-cut, but you essentially want a
JavaScript engine that uses continuation-passing style:

http://en.wikipedia.org/wiki/Continuation-passing_style

Certainly doable but likely difficult.

Adam


On Mon, Jun 28, 2010 at 1:30 AM, Srinivasa Rao Edara
 wrote:
> Hello,
>
> As part of my project, we need to implement custom JS objects using
> JavaScriptCore API.
> I am seeking help in implementing in implementing one of the requirement and
> its possibility of accomplishing it in Webkit/JavaScriptcore.
> So, the requirement is, We need to add custom JS object , lets say
> "MyObject" and this object has one method wait() which should block the
> control until its previously requested operation completes.
>
> in Detail,
>
> 
> function success()
> {
>    alert("Success");
> }
>
> function failure()
> {
>    alert("Failure");
> }
>
> MyObject.postMessage(success,failure,"hello, How r u?");
> MyObject.wait();
> x= 10+1;
> 
>
> Here, MyObject.wait() should resume only after either of its success or
> failure callback is executed. The statement "x=10+1" would be executed only
> after either success or failure callback invoked.
>
> So my question here is, is this really possible to stop execution at one
> place and execute some thing else and resume back to previous execution
> point with JavaScript engine of Webkit.
>
> I have tried this using two threads by blocking the wait using mutex and
> calling success/failure callback using another thread but it app crashing.
>
> Can you please suggest me what are the possible ways to achieve the above
> requirement.
>
>
> Thanks
> Srinu
>
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> webkit-dev@lists.webkit.org
> http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
>
>
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[webkit-dev] parallel controls in JavaScriptCore engine

2010-06-28 Thread Srinivasa Rao Edara 
Hello,

As part of my project, we need to implement custom JS objects using
JavaScriptCore API.
I am seeking help in implementing in implementing one of the requirement and
its possibility of accomplishing it in Webkit/JavaScriptcore.
So, the requirement is, We need to add custom JS object , lets say
"MyObject" and this object has one method wait() which should block the
control until its previously requested operation completes.

in Detail,
*

function success()
{
   alert("Success");
}

function failure()
{
   alert("Failure");
}

MyObject.postMessage(success,failure,"hello, How r u?");
MyObject.wait();
x= 10+1;
*

Here, MyObject.wait() should resume only after either of its success or
failure callback is executed. The statement "x=10+1" would be executed only
after either success or failure callback invoked.

So my question here is, is this really possible to stop execution at one
place and execute some thing else and resume back to previous execution
point with JavaScript engine of Webkit.

I have tried this using two threads by blocking the wait using mutex and
calling success/failure callback using another thread but it app crashing.

Can you please suggest me what are the possible ways to achieve the above
requirement.


Thanks
Srinu
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