dom/base/ProcessMessageManager.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/ParentProcessMessageManager.h"
   8 #include "mozilla/dom/ProcessMessageManager.h"
   9 #include "mozilla/dom/MessageManagerBinding.h"
  10 #include "nsContentUtils.h"
  11
  12 namespace mozilla::dom {
  13
  14 ProcessMessageManager::ProcessMessageManager(
  15     ipc::MessageManagerCallback* aCallback,
  16     ParentProcessMessageManager* aParentManager, MessageManagerFlags aFlags)
  17     : MessageSender(aCallback, aParentManager,
  18                     aFlags | MessageManagerFlags::MM_CHROME |
  19                         MessageManagerFlags::MM_PROCESSMANAGER),
  20       mPid(-1),
  21       // aCallback is only specified if this is the in-process manager.
  22       mInProcess(!!aCallback) {
  23   MOZ_ASSERT(!(aFlags & ~(MessageManagerFlags::MM_GLOBAL |
  24                           MessageManagerFlags::MM_OWNSCALLBACK)));
  25
  26   // This is a bit hackish. We attach to the parent manager, but only if we have
  27   // a callback (which is only for the in-process message manager). For other
  28   // cases we wait until the child process is running (see
  29   // MessageSender::InitWithCallback).
  30   if (aParentManager && mCallback) {
  31     aParentManager->AddChildManager(this);
  32   }
  33 }
  34
  35 JSObject* ProcessMessageManager::WrapObject(JSContext* aCx,
  36                                             JS::Handle<JSObject*> aGivenProto) {
  37   MOZ_ASSERT(nsContentUtils::IsSystemCaller(aCx));
  38
  39   return ProcessMessageManager_Binding::Wrap(aCx, this, aGivenProto);
  40 }
  41
  42 }  // namespace mozilla::dom