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-rw-r--r--dom/ipc/JSOracleParent.cpp81
1 files changed, 81 insertions, 0 deletions
diff --git a/dom/ipc/JSOracleParent.cpp b/dom/ipc/JSOracleParent.cpp
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+/* -*- 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 "mozilla/dom/JSOracleParent.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/PJSOracle.h"
+#include "mozilla/ipc/Endpoint.h"
+#include "mozilla/ipc/UtilityProcessManager.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static StaticRefPtr<JSOracleParent> sOracleSingleton;
+
+/* static */
+void JSOracleParent::WithJSOracle(
+ const std::function<void(JSOracleParent* aParent)>& aCallback) {
+ GetSingleton()->StartJSOracle()->Then(
+ GetMainThreadSerialEventTarget(), __func__,
+ [aCallback](const JSOraclePromise::ResolveOrRejectValue& aResult) {
+ aCallback(aResult.IsReject() || !aResult.ResolveValue()
+ ? nullptr
+ : GetSingleton());
+ });
+}
+
+void JSOracleParent::ActorDestroy(ActorDestroyReason aReason) {
+ // Given an actor can only be bound to one process,
+ // if the utility process crashes and we create a new one,
+ // we can't reuse the same JSOracleParent instance for it,
+ // so we always create a new JSOracleParent to replace
+ // the existing one.
+ if (aReason == ActorDestroyReason::AbnormalShutdown) {
+ sOracleSingleton = new JSOracleParent();
+ }
+}
+
+/* static */
+JSOracleParent* JSOracleParent::GetSingleton() {
+ if (!sOracleSingleton) {
+ sOracleSingleton = new JSOracleParent();
+ ClearOnShutdown(&sOracleSingleton);
+ }
+
+ return sOracleSingleton;
+}
+
+RefPtr<JSOracleParent::JSOraclePromise> JSOracleParent::StartJSOracle() {
+ using namespace mozilla::ipc;
+ RefPtr<JSOracleParent> parent = JSOracleParent::GetSingleton();
+ return UtilityProcessManager::GetSingleton()->StartJSOracle(parent);
+}
+
+nsresult JSOracleParent::BindToUtilityProcess(
+ const RefPtr<mozilla::ipc::UtilityProcessParent>& aUtilityParent) {
+ Endpoint<PJSOracleParent> parentEnd;
+ Endpoint<PJSOracleChild> childEnd;
+ MOZ_ASSERT(aUtilityParent);
+ if (NS_FAILED(PJSOracle::CreateEndpoints(base::GetCurrentProcId(),
+ aUtilityParent->OtherPid(),
+ &parentEnd, &childEnd))) {
+ return NS_ERROR_FAILURE;
+ }
+
+ if (!aUtilityParent->SendStartJSOracleService(std::move(childEnd))) {
+ return NS_ERROR_FAILURE;
+ }
+
+ Bind(std::move(parentEnd));
+
+ return NS_OK;
+}
+
+void JSOracleParent::Bind(Endpoint<PJSOracleParent>&& aEndpoint) {
+ DebugOnly<bool> ok = aEndpoint.Bind(this);
+ MOZ_ASSERT(ok);
+}