1 files changed, 126 insertions, 0 deletions
diff --git a/dom/serviceworkers/ServiceWorkerCloneData.cpp b/dom/serviceworkers/ServiceWorkerCloneData.cpp
new file mode 100644
index 0000000000..babc07f324
--- /dev/null
+++ b/dom/serviceworkers/ServiceWorkerCloneData.cpp
@@ -0,0 +1,126 @@
+/* -*- 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 "ServiceWorkerCloneData.h"
+
+#include <utility>
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/DOMTypes.h"
+#include "mozilla/dom/StructuredCloneHolder.h"
+#include "nsISerialEventTarget.h"
+#include "nsProxyRelease.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+namespace dom {
+
+ServiceWorkerCloneData::~ServiceWorkerCloneData() {
+  RefPtr<ipc::SharedJSAllocatedData> sharedData = TakeSharedData();
+  if (sharedData) {
+    NS_ProxyRelease(__func__, mEventTarget, sharedData.forget());
+  }
+}
+
+ServiceWorkerCloneData::ServiceWorkerCloneData()
+    : ipc::StructuredCloneData(
+          StructuredCloneHolder::StructuredCloneScope::UnknownDestination,
+          StructuredCloneHolder::TransferringSupported),
+      mEventTarget(GetCurrentSerialEventTarget()),
+      mIsErrorMessageData(false) {
+  MOZ_DIAGNOSTIC_ASSERT(mEventTarget);
+}
+
+bool ServiceWorkerCloneData::
+    StealFromAndBuildClonedMessageDataForBackgroundParent(
+        ClonedOrErrorMessageData& aFromClonedData,
+        mozilla::ipc::PBackgroundParent* aParent,
+        ClonedOrErrorMessageData& aToClonedData) {
+  if (aFromClonedData.type() == ClonedOrErrorMessageData::TErrorMessageData) {
+    mIsErrorMessageData = true;
+    aToClonedData = ErrorMessageData();
+    return true;
+  }
+
+  MOZ_DIAGNOSTIC_ASSERT(aFromClonedData.type() ==
+                        ClonedOrErrorMessageData::TClonedMessageData);
+
+  StructuredCloneData::StealFromClonedMessageDataForBackgroundParent(
+      aFromClonedData);
+
+  ClonedMessageData messageData;
+  if (!StructuredCloneData::BuildClonedMessageDataForBackgroundParent(
+          aParent, messageData)) {
+    return false;
+  }
+
+  aToClonedData = std::move(messageData);
+
+  return true;
+}
+
+bool ServiceWorkerCloneData::BuildClonedMessageDataForBackgroundChild(
+    mozilla::ipc::PBackgroundChild* aChild,
+    ClonedOrErrorMessageData& aClonedData) {
+  if (IsErrorMessageData()) {
+    aClonedData = ErrorMessageData();
+    return true;
+  }
+
+  MOZ_DIAGNOSTIC_ASSERT(
+      CloneScope() ==
+      StructuredCloneHolder::StructuredCloneScope::DifferentProcess);
+
+  ClonedMessageData messageData;
+  if (!StructuredCloneData::BuildClonedMessageDataForBackgroundChild(
+          aChild, messageData)) {
+    return false;
+  }
+
+  aClonedData = std::move(messageData);
+
+  return true;
+}
+
+void ServiceWorkerCloneData::CopyFromClonedMessageDataForBackgroundParent(
+    const ClonedOrErrorMessageData& aClonedData) {
+  if (aClonedData.type() == ClonedOrErrorMessageData::TErrorMessageData) {
+    mIsErrorMessageData = true;
+    return;
+  }
+
+  MOZ_DIAGNOSTIC_ASSERT(aClonedData.type() ==
+                        ClonedOrErrorMessageData::TClonedMessageData);
+
+  StructuredCloneData::CopyFromClonedMessageDataForBackgroundParent(
+      aClonedData);
+}
+
+void ServiceWorkerCloneData::CopyFromClonedMessageDataForBackgroundChild(
+    const ClonedOrErrorMessageData& aClonedData) {
+  if (aClonedData.type() == ClonedOrErrorMessageData::TErrorMessageData) {
+    mIsErrorMessageData = true;
+    return;
+  }
+
+  MOZ_DIAGNOSTIC_ASSERT(aClonedData.type() ==
+                        ClonedOrErrorMessageData::TClonedMessageData);
+
+  StructuredCloneData::CopyFromClonedMessageDataForBackgroundChild(aClonedData);
+}
+
+void ServiceWorkerCloneData::SetAsErrorMessageData() {
+  MOZ_ASSERT(CloneScope() ==
+             StructuredCloneHolder::StructuredCloneScope::SameProcess);
+
+  mIsErrorMessageData = true;
+}
+
+bool ServiceWorkerCloneData::IsErrorMessageData() const {
+  return mIsErrorMessageData;
+}
+
+}  // namespace dom
+}  // namespace mozilla