Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 190 insertions, 0 deletions

diff --git a/dom/workers/remoteworkers/RemoteWorkerService.cpp b/dom/workers/remoteworkers/RemoteWorkerService.cpp
new file mode 100644
index 0000000000..6cdbb79d94
--- /dev/null
+++ b/dom/workers/remoteworkers/RemoteWorkerService.cpp
@@ -0,0 +1,190 @@
+/* -*- 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 "RemoteWorkerService.h"
+
+#include "mozilla/dom/PRemoteWorkerParent.h"
+#include "mozilla/ipc/BackgroundChild.h"
+#include "mozilla/ipc/BackgroundParent.h"
+#include "mozilla/ipc/PBackgroundChild.h"
+#include "mozilla/ipc/PBackgroundParent.h"
+#include "mozilla/SchedulerGroup.h"
+#include "mozilla/Services.h"
+#include "mozilla/StaticMutex.h"
+#include "mozilla/StaticPtr.h"
+#include "nsIObserverService.h"
+#include "nsIThread.h"
+#include "nsThreadUtils.h"
+#include "nsXPCOMPrivate.h"
+#include "RemoteWorkerController.h"
+#include "RemoteWorkerServiceChild.h"
+#include "RemoteWorkerServiceParent.h"
+
+namespace mozilla {
+
+using namespace ipc;
+
+namespace dom {
+
+namespace {
+
+StaticMutex sRemoteWorkerServiceMutex;
+StaticRefPtr<RemoteWorkerService> sRemoteWorkerService;
+
+}  // namespace
+
+/* static */
+void RemoteWorkerService::Initialize() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  StaticMutexAutoLock lock(sRemoteWorkerServiceMutex);
+  MOZ_ASSERT(!sRemoteWorkerService);
+
+  RefPtr<RemoteWorkerService> service = new RemoteWorkerService();
+
+  if (!XRE_IsParentProcess()) {
+    nsresult rv = service->InitializeOnMainThread();
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return;
+    }
+
+    sRemoteWorkerService = service;
+    return;
+  }
+
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (NS_WARN_IF(!obs)) {
+    return;
+  }
+
+  nsresult rv = obs->AddObserver(service, "profile-after-change", false);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return;
+  }
+
+  sRemoteWorkerService = service;
+}
+
+/* static */
+nsIThread* RemoteWorkerService::Thread() {
+  StaticMutexAutoLock lock(sRemoteWorkerServiceMutex);
+  MOZ_ASSERT(sRemoteWorkerService);
+  MOZ_ASSERT(sRemoteWorkerService->mThread);
+  return sRemoteWorkerService->mThread;
+}
+
+nsresult RemoteWorkerService::InitializeOnMainThread() {
+  // I would like to call this thread "DOM Remote Worker Launcher", but the max
+  // length is 16 chars.
+  nsresult rv = NS_NewNamedThread("Worker Launcher", getter_AddRefs(mThread));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (NS_WARN_IF(!obs)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  rv = obs->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  RefPtr<RemoteWorkerService> self = this;
+  nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
+      "InitializeThread", [self]() { self->InitializeOnTargetThread(); });
+
+  rv = mThread->Dispatch(r.forget(), NS_DISPATCH_NORMAL);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  return NS_OK;
+}
+
+RemoteWorkerService::RemoteWorkerService() { MOZ_ASSERT(NS_IsMainThread()); }
+
+RemoteWorkerService::~RemoteWorkerService() = default;
+
+void RemoteWorkerService::InitializeOnTargetThread() {
+  MOZ_ASSERT(mThread);
+  MOZ_ASSERT(mThread->IsOnCurrentThread());
+
+  PBackgroundChild* actorChild = BackgroundChild::GetOrCreateForCurrentThread();
+  if (NS_WARN_IF(!actorChild)) {
+    return;
+  }
+
+  RemoteWorkerServiceChild* actor = static_cast<RemoteWorkerServiceChild*>(
+      actorChild->SendPRemoteWorkerServiceConstructor());
+  if (NS_WARN_IF(!actor)) {
+    return;
+  }
+
+  // Now we are ready!
+  mActor = actor;
+}
+
+void RemoteWorkerService::ShutdownOnTargetThread() {
+  MOZ_ASSERT(mThread);
+  MOZ_ASSERT(mThread->IsOnCurrentThread());
+
+  // If mActor is nullptr it means that initialization failed.
+  if (mActor) {
+    // Here we need to shutdown the IPC protocol.
+    mActor->Send__delete__(mActor);
+    mActor = nullptr;
+  }
+
+  // Then we can terminate the thread on the main-thread.
+  RefPtr<RemoteWorkerService> self = this;
+  nsCOMPtr<nsIRunnable> r =
+      NS_NewRunnableFunction("ShutdownOnMainThread", [self]() {
+        self->mThread->Shutdown();
+        self->mThread = nullptr;
+      });
+
+  SchedulerGroup::Dispatch(TaskCategory::Other, r.forget());
+}
+
+NS_IMETHODIMP
+RemoteWorkerService::Observe(nsISupports* aSubject, const char* aTopic,
+                             const char16_t* aData) {
+  if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
+    MOZ_ASSERT(mThread);
+
+    nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+    if (obs) {
+      obs->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
+    }
+
+    RefPtr<RemoteWorkerService> self = this;
+    nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
+        "ShutdownThread", [self]() { self->ShutdownOnTargetThread(); });
+
+    mThread->Dispatch(r.forget(), NS_DISPATCH_NORMAL);
+
+    StaticMutexAutoLock lock(sRemoteWorkerServiceMutex);
+    sRemoteWorkerService = nullptr;
+    return NS_OK;
+  }
+
+  MOZ_ASSERT(!strcmp(aTopic, "profile-after-change"));
+  MOZ_ASSERT(XRE_IsParentProcess());
+
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (obs) {
+    obs->RemoveObserver(this, "profile-after-change");
+  }
+
+  return InitializeOnMainThread();
+}
+
+NS_IMPL_ISUPPORTS(RemoteWorkerService, nsIObserver)
+
+}  // namespace dom
+}  // namespace mozilla