T
On Sun, Sep 7, 2008 at 10:41 PM, <[EMAIL PROTECTED]> wrote:
>
> Thanks Scott,
?? :-)
> What if, instead of passing the context and function as arguments to
> CallBack, I save them at a time when I have the V8 lock, as persistent
> handles in a C++ object then pass the C++ object as the argument to
> CallBack() ?
That sounds fine.
>
> Cheers, Paul.
>
> On Sep 8, 4:55 am, "Erik Corry" <[EMAIL PROTECTED]> wrote:
>> That looks reasonable, except you need to hold the V8 lock in order to
>> do anything with Handles, and that includes passing them as arguments
>> to a method like CallBack. Passing them as arguments makes a copy of
>> the handle. So you can't take the V8 lock in CallBack, you have to
>> already have it before calling.
>>
>>
>>
>> On Sun, Sep 7, 2008 at 10:51 AM, <[EMAIL PROTECTED]> wrote:
>>
>> > On further inspection of the v8 source it appears that the correct
>> > approach might be something of the form...
>>
>> > void CallBack( Handle<Context> _context, Handle<Object> _function,
>> > arg1, arg2, arg3, ... )
>> > {
>> > // ... we are on a different thread to that running the script...
>> > Locker locker; // gain a mutex on v8
>> > Scope scope( _context ); // Select the function's
>> > context
>> > HandleScope handleScope; // create a scope for locals
>> > const int argc = ??;
>> > // Compose args from arg1, arg2 ...
>> > Handle<Value> argv[ argc ] = { Handle<Type>( arg1),
>> > Handle<Type>( arg2), ... };
>> > _funcation->Call( _context_->Global(), argc, argv );
>> > }
>>
>> > On Sep 7, 8:48 am, [EMAIL PROTECTED] wrote:
>> >> Thanks, I was aware of the need to use a Locker, I was unsure if any
>> >> other precautions were necessary ?
>>
>> >> Paul.
>>
>> >> On Sep 7, 1:47 am, CGamesPlay <[EMAIL PROTECTED]> wrote:
>>
>> >> > The Locker is advisory, so you need to use it in all threads that will
>> >> > be contending for v8.
>>
>> >> > On Sep 6, 4:01 am, [EMAIL PROTECTED] wrote:
>>
>> >> > > I have a server application where I handle incoming requests by
>> >> > > passing them to a callback into a javascript function that exists in
>> >> > > an already compiled and executing ( doing other things ) javascript
>> >> > > context.
>>
>> >> > > Do I need to do anything special other than instantiating a v8::Locker
>> >> > > prior to the call to the javascript function ? At the time of callback
>> >> > > I have a reference to the running context.
>>
>> >> > > Cheers, Paul.
>>
>> --
>> Erik Corry, Software Engineer
>>
>> Google Denmark ApS. CVR nr. 28 86 69 84
>> c/o Philip & Partners, 7 Vognmagergade, P.O. Box 2227, DK-1018
>> Copenhagen K, Denmark.
> >
>
--
Erik Corry, Software Engineer
Google Denmark ApS. CVR nr. 28 86 69 84
c/o Philip & Partners, 7 Vognmagergade, P.O. Box 2227, DK-1018
Copenhagen K, Denmark.
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