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.
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