Sorry, forgot to mention... the native thread has 2MB available stack
space at the point of calling into the javascript function.
On Sep 8, 10:51 pm, [EMAIL PROTECTED] wrote:
> I'm calling a single line non-recursive javascript function that
> simple increments a counter and during the function call the exception
>
> RangeError : Maximum call stack size exceeded
>
> is raised.
>
> I'm guessing I need to set up a call stack frame on the foreign thread
> before calling into javascript ?
>
> I've been sifting through the source but can't see an obvious way to
> do this, does anyone have some tips ?
>
> Paul S.
>
> On Sep 8, 6:54 am, "Erik Corry" <[EMAIL PROTECTED]> wrote:
>
> > 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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