Implement Asynchronous Module Definition API for Mojo

gin/per_context_data.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gin/per_context_data.h"
+
+#include <assert.h>
+#include "gin/wrapper_info.h"
+
+namespace gin {
+
+ContextSupplement::ContextSupplement() {
+}
+
+ContextSupplement::~ContextSupplement() {
+}
+
+PerContextData::PerContextData(v8::Handle<v8::Context> context) {
+  context->SetAlignedPointerInEmbedderData(kEncodedValueIndex, this);
+}
+
+PerContextData::~PerContextData() {
+  assert(supplements_.empty());
+}
+
+void PerContextData::Detach(v8::Handle<v8::Context> context) {
+  assert(From(context) == this);
+  context->SetAlignedPointerInEmbedderData(kEncodedValueIndex, NULL);
+
+  SuplementVector supplements;
+  supplements.swap(supplements_);
+
+  for (SuplementVector::iterator it = supplements.begin();
+       it != supplements.end(); ++it) {
+    (*it)->Detach(context);
+    delete *it;
+  }
+}
+
+PerContextData* PerContextData::From(v8::Handle<v8::Context> context) {
+  return static_cast<PerContextData*>(
+      context->GetAlignedPointerFromEmbedderData(kEncodedValueIndex));
+}
+
+void PerContextData::AddSupplement(ContextSupplement* supplement) {
+  supplements_.push_back(supplement);
+}
+
+}  // namespace gin