JSProcessActorParent.cpp

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/* 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/JSProcessActorParent.h"

#include "mozilla/dom/InProcessChild.h"

#include "mozilla/dom/InProcessParent.h"

#include "mozilla/dom/JSIPCValue.h"

#include "mozilla/dom/JSIPCValueUtils.h"

#include "mozilla/dom/JSProcessActorBinding.h"

namespace mozilla::dom {

NS_IMPL_CYCLE_COLLECTION_INHERITED(JSProcessActorParent, JSActor, mManager)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(JSProcessActorParent)

NS_INTERFACE_MAP_END_INHERITING(JSActor)

NS_IMPL_ADDREF_INHERITED(JSProcessActorParent, JSActor)

NS_IMPL_RELEASE_INHERITED(JSProcessActorParent, JSActor)

JSObject* JSProcessActorParent::WrapObject(JSContext* aCx,

                                           JS::Handle<JSObject*> aGivenProto) {

  return JSProcessActorParent_Binding::Wrap(aCx, this, aGivenProto);

void JSProcessActorParent::Init(const nsACString& aName,

                                nsIDOMProcessParent* aManager) {

  MOZ_ASSERT(!mManager, "Cannot Init() a JSProcessActorParent twice!");

  mManager = aManager;

  JSActor::Init(aName, /* aSendTyped= */ false);

JSProcessActorParent::~JSProcessActorParent() { MOZ_ASSERT(!mManager); }

void JSProcessActorParent::SendRawMessage(const JSActorMessageMeta& aMeta,

                                          JSIPCValue&& aData,

                                          ipc::StructuredCloneData* aStack,

                                          ErrorResult& aRv) {

  if (NS_WARN_IF(!CanSend() || !mManager || !mManager->GetCanSend())) {

    aRv.ThrowInvalidStateError(

        nsPrintfCString("Actor '%s' cannot send message '%s' during shutdown.",

                        PromiseFlatCString(aMeta.actorName()).get(),

                        NS_ConvertUTF16toUTF8(aMeta.messageName()).get()));

    return;

  // If the parent side is in the same process, we have a PInProcess manager,

  // and can dispatch the message directly to the event loop.

  ContentParent* contentParent = mManager->AsContentParent();

  if (!contentParent) {

    SendRawMessageInProcess(aMeta, std::move(aData), std::move(aStack), []() {

      return do_AddRef(InProcessChild::Singleton());

});

    return;

  if (NS_WARN_IF(!contentParent->SendRawMessage(aMeta, aData, aStack))) {

    aRv.ThrowOperationError(

        nsPrintfCString("JSProcessActorParent send error in actor '%s'",

                        PromiseFlatCString(aMeta.actorName()).get()));

    return;

void JSProcessActorParent::ClearManager() { mManager = nullptr; }

}  // namespace mozilla::dom