Add m-esr52 at 52.6.0

1 files changed, 177 insertions, 0 deletions

diff --git a/dom/messagechannel/MessagePortParent.cpp b/dom/messagechannel/MessagePortParent.cpp
new file mode 100644
index 000000000..bf68c2630
--- /dev/null
+++ b/dom/messagechannel/MessagePortParent.cpp
@@ -0,0 +1,177 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "MessagePortParent.h"
+#include "MessagePortService.h"
+#include "SharedMessagePortMessage.h"
+#include "mozilla/Unused.h"
+
+namespace mozilla {
+namespace dom {
+
+MessagePortParent::MessagePortParent(const nsID& aUUID)
+  : mService(MessagePortService::GetOrCreate())
+  , mUUID(aUUID)
+  , mEntangled(false)
+  , mCanSendData(true)
+{
+  MOZ_ASSERT(mService);
+}
+
+MessagePortParent::~MessagePortParent()
+{
+  MOZ_ASSERT(!mService);
+  MOZ_ASSERT(!mEntangled);
+}
+
+bool
+MessagePortParent::Entangle(const nsID& aDestinationUUID,
+                            const uint32_t& aSequenceID)
+{
+  if (!mService) {
+    NS_WARNING("Entangle is called after a shutdown!");
+    return false;
+  }
+
+  MOZ_ASSERT(!mEntangled);
+
+  return mService->RequestEntangling(this, aDestinationUUID, aSequenceID);
+}
+
+bool
+MessagePortParent::RecvPostMessages(nsTArray<MessagePortMessage>&& aMessages)
+{
+  // This converts the object in a data struct where we have BlobImpls.
+  FallibleTArray<RefPtr<SharedMessagePortMessage>> messages;
+  if (NS_WARN_IF(
+      !SharedMessagePortMessage::FromMessagesToSharedParent(aMessages,
+                                                            messages))) {
+    return false;
+  }
+
+  if (!mEntangled) {
+    return false;
+  }
+
+  if (!mService) {
+    NS_WARNING("Entangle is called after a shutdown!");
+    return false;
+  }
+
+  if (messages.IsEmpty()) {
+    return false;
+  }
+
+  return mService->PostMessages(this, messages);
+}
+
+bool
+MessagePortParent::RecvDisentangle(nsTArray<MessagePortMessage>&& aMessages)
+{
+  // This converts the object in a data struct where we have BlobImpls.
+  FallibleTArray<RefPtr<SharedMessagePortMessage>> messages;
+  if (NS_WARN_IF(
+      !SharedMessagePortMessage::FromMessagesToSharedParent(aMessages,
+                                                            messages))) {
+    return false;
+  }
+
+  if (!mEntangled) {
+    return false;
+  }
+
+  if (!mService) {
+    NS_WARNING("Entangle is called after a shutdown!");
+    return false;
+  }
+
+  if (!mService->DisentanglePort(this, messages)) {
+    return false;
+  }
+
+  CloseAndDelete();
+  return true;
+}
+
+bool
+MessagePortParent::RecvStopSendingData()
+{
+  if (!mEntangled) {
+    return true;
+  }
+
+  mCanSendData = false;
+  Unused << SendStopSendingDataConfirmed();
+  return true;
+}
+
+bool
+MessagePortParent::RecvClose()
+{
+  if (mService) {
+    MOZ_ASSERT(mEntangled);
+
+    if (!mService->ClosePort(this)) {
+      return false;
+    }
+
+    Close();
+  }
+
+  MOZ_ASSERT(!mEntangled);
+
+  Unused << Send__delete__(this);
+  return true;
+}
+
+void
+MessagePortParent::ActorDestroy(ActorDestroyReason aWhy)
+{
+  if (mService && mEntangled) {
+    // When the last parent is deleted, this service is freed but this cannot
+    // be done when the hashtables are written by CloseAll.
+    RefPtr<MessagePortService> kungFuDeathGrip = mService;
+    kungFuDeathGrip->ParentDestroy(this);
+  }
+}
+
+bool
+MessagePortParent::Entangled(const nsTArray<MessagePortMessage>& aMessages)
+{
+  MOZ_ASSERT(!mEntangled);
+  mEntangled = true;
+  return SendEntangled(aMessages);
+}
+
+void
+MessagePortParent::CloseAndDelete()
+{
+  Close();
+  Unused << Send__delete__(this);
+}
+
+void
+MessagePortParent::Close()
+{
+  mService = nullptr;
+  mEntangled = false;
+}
+
+/* static */ bool
+MessagePortParent::ForceClose(const nsID& aUUID,
+                              const nsID& aDestinationUUID,
+                              const uint32_t& aSequenceID)
+{
+  MessagePortService* service =  MessagePortService::Get();
+  if (!service) {
+    NS_WARNING("The service must exist if we want to close an existing MessagePort.");
+    return false;
+  }
+
+  return service->ForceClose(aUUID, aDestinationUUID, aSequenceID);
+}
+
+} // namespace dom
+} // namespace mozilla