gecko-dev/dom/base/ProcessMessageManager.cpp

/* -*- 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/ParentProcessMessageManager.h"
#include "mozilla/dom/ProcessMessageManager.h"
#include "mozilla/dom/MessageManagerBinding.h"
#include "nsContentUtils.h"

namespace mozilla::dom {

ProcessMessageManager::ProcessMessageManager(
    ipc::MessageManagerCallback* aCallback,
    ParentProcessMessageManager* aParentManager, MessageManagerFlags aFlags)
    : MessageSender(aCallback, aParentManager,
                    aFlags | MessageManagerFlags::MM_CHROME |
                        MessageManagerFlags::MM_PROCESSMANAGER),
      mPid(-1),
      // aCallback is only specified if this is the in-process manager.
      mInProcess(!!aCallback) {
  MOZ_ASSERT(!(aFlags & ~(MessageManagerFlags::MM_GLOBAL |
                          MessageManagerFlags::MM_OWNSCALLBACK)));

  // This is a bit hackish. We attach to the parent manager, but only if we have
  // a callback (which is only for the in-process message manager). For other
  // cases we wait until the child process is running (see
  // MessageSender::InitWithCallback).
  if (aParentManager && mCallback) {
    aParentManager->AddChildManager(this);
  }
}

JSObject* ProcessMessageManager::WrapObject(JSContext* aCx,
                                            JS::Handle<JSObject*> aGivenProto) {
  MOZ_ASSERT(nsContentUtils::IsSystemCaller(aCx));

  return ProcessMessageManager_Binding::Wrap(aCx, this, aGivenProto);
}

}  // namespace mozilla::dom