I think you just need a ContextScope in Bar before interacting with V8 again.
Almost no calls into V8 will work (especially when interacting with V8 values) without a current Context being set. matt On Wed, Apr 20, 2011 at 11:44 AM, Anthony <[email protected]> wrote: > New to v8, I'm compiling a script that returns a JS object, and I'd > like to keep a handle to a function that is a property of that object. > I'm creating a persistent handle to it, but it's not working. I assume > because the underlying handle is going out of scope? > > v8::Persistent<v8::Context> context; > v8::Persistent<v8::Function> update; > > void Foo() { > v8::HandleScope handle_scope; > > context = v8::Context::New(NULL, global); > v8::Context::Scope context_scope(context); > > v8::Local<v8::Script> script = // script compiles fine > > v8::Local<v8::Value> result = script->Run(); > v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(result); > // i've tried creating a persistent handle to obj and using > that from here down. doesn't work either > v8::Local<v8::Value> update_val = obj- > >Get(v8::Local<v8::String>(v8::String::New("update"))); > v8::Local<v8::Function> update_fun = > v8::Local<v8::Function>::Cast(update_val); > // create persistent handle to keep around > update = v8::Persistent<v8::Function>::New(update_fun); > > // calling now works fine > v8::Local<v8::Number> v = v8::Number::New(0.2); > v8::Local<v8::Value> val[1] = { v }; > update->Call(context->Global(), 1, val); > } > > void Bar() { > // calling here doesn't work > v8::Local<v8::Number> v = v8::Number::New(0.2); > v8::Local<v8::Value> val[1] = { v }; > update->Call(context->Global(), 1, val); > } > > -- > v8-users mailing list > [email protected] > http://groups.google.com/group/v8-users > -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users
