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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 "Worker.h"
#include "MessageEventRunnable.h"
#include "mozilla/dom/WorkerBinding.h"
#include "mozilla/TimelineConsumers.h"
#include "mozilla/Unused.h"
#include "mozilla/WorkerTimelineMarker.h"
#include "nsContentUtils.h"
#include "nsGlobalWindowOuter.h"
#include "WorkerPrivate.h"
#ifdef XP_WIN
# undef PostMessage
#endif
namespace mozilla {
namespace dom {
/* static */
already_AddRefed<Worker> Worker::Constructor(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
const WorkerOptions& aOptions,
ErrorResult& aRv) {
JSContext* cx = aGlobal.Context();
nsCOMPtr<nsIGlobalObject> globalObject =
do_QueryInterface(aGlobal.GetAsSupports());
if (globalObject->AsInnerWindow() &&
!globalObject->AsInnerWindow()->IsCurrentInnerWindow()) {
aRv.ThrowInvalidStateError(
"Cannot create worker for a going to be discarded document");
return nullptr;
}
RefPtr<WorkerPrivate> workerPrivate = WorkerPrivate::Constructor(
cx, aScriptURL, false /* aIsChromeWorker */, WorkerTypeDedicated,
aOptions.mName, VoidCString(), nullptr /*aLoadInfo */, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
RefPtr<Worker> worker = new Worker(globalObject, workerPrivate.forget());
return worker.forget();
}
Worker::Worker(nsIGlobalObject* aGlobalObject,
already_AddRefed<WorkerPrivate> aWorkerPrivate)
: DOMEventTargetHelper(aGlobalObject),
mWorkerPrivate(std::move(aWorkerPrivate)) {
MOZ_ASSERT(mWorkerPrivate);
mWorkerPrivate->SetParentEventTargetRef(this);
}
Worker::~Worker() { Terminate(); }
JSObject* Worker::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
JS::Rooted<JSObject*> wrapper(aCx,
Worker_Binding::Wrap(aCx, this, aGivenProto));
if (wrapper) {
// Most DOM objects don't assume they have a reflector. If they don't have
// one and need one, they create it. But in workers code, we assume that the
// reflector is always present. In order to guarantee that it's always
// present, we have to preserve it. Otherwise the GC will happily collect it
// as needed.
MOZ_ALWAYS_TRUE(TryPreserveWrapper(wrapper));
}
return wrapper;
}
void Worker::PostMessage(JSContext* aCx, JS::Handle<JS::Value> aMessage,
const Sequence<JSObject*>& aTransferable,
ErrorResult& aRv) {
NS_ASSERT_OWNINGTHREAD(Worker);
if (!mWorkerPrivate || mWorkerPrivate->ParentStatusProtected() > Running) {
return;
}
JS::Rooted<JS::Value> transferable(aCx, JS::UndefinedValue());
aRv = nsContentUtils::CreateJSValueFromSequenceOfObject(aCx, aTransferable,
&transferable);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
RefPtr<MessageEventRunnable> runnable = new MessageEventRunnable(
mWorkerPrivate, WorkerRunnable::WorkerThreadModifyBusyCount);
UniquePtr<AbstractTimelineMarker> start;
UniquePtr<AbstractTimelineMarker> end;
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
bool isTimelineRecording = timelines && !timelines->IsEmpty();
if (isTimelineRecording) {
start = MakeUnique<WorkerTimelineMarker>(
NS_IsMainThread()
? ProfileTimelineWorkerOperationType::SerializeDataOnMainThread
: ProfileTimelineWorkerOperationType::SerializeDataOffMainThread,
MarkerTracingType::START);
}
JS::CloneDataPolicy clonePolicy;
// DedicatedWorkers are always part of the same agent cluster.
clonePolicy.allowIntraClusterClonableSharedObjects();
if (NS_IsMainThread()) {
nsGlobalWindowInner* win = nsContentUtils::CallerInnerWindow();
if (win && win->IsSharedMemoryAllowed()) {
clonePolicy.allowSharedMemoryObjects();
}
} else {
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
if (worker && worker->IsSharedMemoryAllowed()) {
clonePolicy.allowSharedMemoryObjects();
}
}
runnable->Write(aCx, aMessage, transferable, clonePolicy, aRv);
if (isTimelineRecording) {
end = MakeUnique<WorkerTimelineMarker>(
NS_IsMainThread()
? ProfileTimelineWorkerOperationType::SerializeDataOnMainThread
: ProfileTimelineWorkerOperationType::SerializeDataOffMainThread,
MarkerTracingType::END);
timelines->AddMarkerForAllObservedDocShells(start);
timelines->AddMarkerForAllObservedDocShells(end);
}
if (NS_WARN_IF(aRv.Failed())) {
return;
}
// The worker could have closed between the time we entered this function and
// checked ParentStatusProtected and now, which could cause the dispatch to
// fail.
Unused << NS_WARN_IF(!runnable->Dispatch());
}
void Worker::PostMessage(JSContext* aCx, JS::Handle<JS::Value> aMessage,
const PostMessageOptions& aOptions, ErrorResult& aRv) {
PostMessage(aCx, aMessage, aOptions.mTransfer, aRv);
}
void Worker::Terminate() {
NS_ASSERT_OWNINGTHREAD(Worker);
if (mWorkerPrivate) {
mWorkerPrivate->Cancel();
mWorkerPrivate = nullptr;
}
}
NS_IMPL_CYCLE_COLLECTION_CLASS(Worker)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(Worker, DOMEventTargetHelper)
if (tmp->mWorkerPrivate) {
tmp->mWorkerPrivate->Traverse(cb);
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(Worker, DOMEventTargetHelper)
tmp->Terminate();
NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_PTR
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(Worker, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Worker)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(Worker, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(Worker, DOMEventTargetHelper)
} // namespace dom
} // namespace mozilla
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