1 files changed, 132 insertions, 0 deletions
diff --git a/dom/broadcastchannel/BroadcastChannelService.cpp b/dom/broadcastchannel/BroadcastChannelService.cpp
new file mode 100644
index 000000000..f88108c3a
--- /dev/null
+++ b/dom/broadcastchannel/BroadcastChannelService.cpp
@@ -0,0 +1,132 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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 "BroadcastChannelService.h"
+#include "BroadcastChannelParent.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/ipc/BlobParent.h"
+#include "mozilla/ipc/BackgroundParent.h"
+
+#ifdef XP_WIN
+#undef PostMessage
+#endif
+
+namespace mozilla {
+
+using namespace ipc;
+
+namespace dom {
+
+namespace {
+
+BroadcastChannelService* sInstance = nullptr;
+
+} // namespace
+
+BroadcastChannelService::BroadcastChannelService()
+{
+  AssertIsOnBackgroundThread();
+
+  // sInstance is a raw BroadcastChannelService*.
+  MOZ_ASSERT(!sInstance);
+  sInstance = this;
+}
+
+BroadcastChannelService::~BroadcastChannelService()
+{
+  AssertIsOnBackgroundThread();
+  MOZ_ASSERT(sInstance == this);
+  MOZ_ASSERT(mAgents.Count() == 0);
+
+  sInstance = nullptr;
+}
+
+// static
+already_AddRefed<BroadcastChannelService>
+BroadcastChannelService::GetOrCreate()
+{
+  AssertIsOnBackgroundThread();
+
+  RefPtr<BroadcastChannelService> instance = sInstance;
+  if (!instance) {
+    instance = new BroadcastChannelService();
+  }
+  return instance.forget();
+}
+
+void
+BroadcastChannelService::RegisterActor(BroadcastChannelParent* aParent,
+                                       const nsAString& aOriginChannelKey)
+{
+  AssertIsOnBackgroundThread();
+  MOZ_ASSERT(aParent);
+
+  nsTArray<BroadcastChannelParent*>* parents;
+  if (!mAgents.Get(aOriginChannelKey, &parents)) {
+    parents = new nsTArray<BroadcastChannelParent*>();
+    mAgents.Put(aOriginChannelKey, parents);
+  }
+
+  MOZ_ASSERT(!parents->Contains(aParent));
+  parents->AppendElement(aParent);
+}
+
+void
+BroadcastChannelService::UnregisterActor(BroadcastChannelParent* aParent,
+                                         const nsAString& aOriginChannelKey)
+{
+  AssertIsOnBackgroundThread();
+  MOZ_ASSERT(aParent);
+
+  nsTArray<BroadcastChannelParent*>* parents;
+  if (!mAgents.Get(aOriginChannelKey, &parents)) {
+    MOZ_CRASH("Invalid state");
+  }
+
+  parents->RemoveElement(aParent);
+  if (parents->IsEmpty()) {
+    mAgents.Remove(aOriginChannelKey);
+  }
+}
+
+void
+BroadcastChannelService::PostMessage(BroadcastChannelParent* aParent,
+                                     const ClonedMessageData& aData,
+                                     const nsAString& aOriginChannelKey)
+{
+  AssertIsOnBackgroundThread();
+  MOZ_ASSERT(aParent);
+
+  nsTArray<BroadcastChannelParent*>* parents;
+  if (!mAgents.Get(aOriginChannelKey, &parents)) {
+    MOZ_CRASH("Invalid state");
+  }
+
+  // We need to keep the array alive for the life-time of this operation.
+  nsTArray<RefPtr<BlobImpl>> blobs;
+  if (!aData.blobsParent().IsEmpty()) {
+    blobs.SetCapacity(aData.blobsParent().Length());
+
+    for (uint32_t i = 0, len = aData.blobsParent().Length(); i < len; ++i) {
+      RefPtr<BlobImpl> impl =
+        static_cast<BlobParent*>(aData.blobsParent()[i])->GetBlobImpl();
+     MOZ_ASSERT(impl);
+     blobs.AppendElement(impl);
+    }
+  }
+
+  for (uint32_t i = 0; i < parents->Length(); ++i) {
+    BroadcastChannelParent* parent = parents->ElementAt(i);
+    MOZ_ASSERT(parent);
+
+    if (parent != aParent) {
+      parent->Deliver(aData);
+    }
+  }
+}
+
+} // namespace dom
+} // namespace mozilla