1 files changed, 70 insertions, 0 deletions
diff --git a/dom/localstorage/LSObserver.cpp b/dom/localstorage/LSObserver.cpp
new file mode 100644
index 0000000000..fda56bd1ed
--- /dev/null
+++ b/dom/localstorage/LSObserver.cpp
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "LSObserver.h"
+
+// Local includes
+#include "ActorsChild.h"
+
+// Global includes
+#include <utility>
+#include "mozilla/StaticPtr.h"
+#include "nsTHashMap.h"
+#include "nsHashKeys.h"
+
+namespace mozilla::dom {
+
+namespace {
+
+using LSObserverHashtable = nsTHashMap<nsCStringHashKey, LSObserver*>;
+
+StaticAutoPtr<LSObserverHashtable> gLSObservers;
+
+}  // namespace
+
+LSObserver::LSObserver(const nsACString& aOrigin)
+    : mActor(nullptr), mOrigin(aOrigin) {
+  AssertIsOnOwningThread();
+
+  if (!gLSObservers) {
+    gLSObservers = new LSObserverHashtable();
+  }
+
+  MOZ_ASSERT(!gLSObservers->Contains(mOrigin));
+  gLSObservers->InsertOrUpdate(mOrigin, this);
+}
+
+LSObserver::~LSObserver() {
+  AssertIsOnOwningThread();
+
+  if (mActor) {
+    mActor->SendDeleteMeInternal();
+    MOZ_ASSERT(!mActor, "SendDeleteMeInternal should have cleared!");
+  }
+
+  MOZ_ASSERT(gLSObservers);
+  MOZ_ASSERT(gLSObservers->Get(mOrigin));
+  gLSObservers->Remove(mOrigin);
+
+  if (!gLSObservers->Count()) {
+    gLSObservers = nullptr;
+  }
+}
+
+// static
+LSObserver* LSObserver::Get(const nsACString& aOrigin) {
+  return gLSObservers ? gLSObservers->Get(aOrigin) : nullptr;
+}
+
+void LSObserver::SetActor(LSObserverChild* aActor) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(aActor);
+  MOZ_ASSERT(!mActor);
+
+  mActor = aActor;
+}
+
+}  // namespace mozilla::dom