IDL compiler: AudioBuffer interfaces

Source/bindings/templates/interface.cpp

 {% extends 'interface_base.cpp' %}
 
 
 {##############################################################################}
 {% macro attribute_configuration(attribute) %}
 {% set getter_callback =
        '%sV8Internal::%sAttributeGetterCallback' %
             (cpp_class, attribute.name)
        if not attribute.constructor_type else
        '{0}V8Internal::{0}ConstructorGetter'.format(interface_name) %}
@@ skipping 710 matching lines @@
             v8::Handle<v8::Object> wrapper = DOMDataStore::getWrapper<{{v8_class}}>(impl.get(), isolate);
             if (!wrapper.IsEmpty())
                 return wrapper;
         }
     }
     {% endif %}
     v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, &wrapperTypeInfo, toInternalPointer(impl.get()), isolate);
     if (UNLIKELY(wrapper.IsEmpty()))
         return wrapper;
 
+    {% if is_audio_buffer %}
+    {# We only setDeallocationObservers on array buffers that are held by some
+       object in the V8 heap, not in the ArrayBuffer constructor itself.
+       This is because V8 GC only cares about memory it can free on GC, and
+       until the object is exposed to JavaScript, V8 GC doesn't affect it. #}
+    for (unsigned i = 0, n = impl->numberOfChannels(); i < n; i++) {
+        Float32Array* channelData = impl->getChannelData(i);
+        channelData->buffer()->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instanceTemplate());
+    }
+    {% endif %}
     installPerContextEnabledProperties(wrapper, impl.get(), isolate);
     {% set wrapper_configuration = 'WrapperConfiguration::Dependent'
                                    if (has_visit_dom_wrapper or
                                        is_active_dom_object or
                                        is_dependent_lifetime) else
                                    'WrapperConfiguration::Independent' %}
     V8DOMWrapper::associateObjectWithWrapper<{{v8_class}}>(impl, &wrapperTypeInfo, wrapper, isolate, {{wrapper_configuration}});
     return wrapper;
 }
 
 {% endif %}
 {% endblock %}
 
 
 {##############################################################################}
 {% block deref_object_and_to_v8_no_inline %}
 void {{v8_class}}::derefObject(void* object)
 {
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline({{cpp_class}}* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 {% endblock %}