dom/midi/MIDIManagerChild.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   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 "MIDIManagerChild.h"
   8 #include "mozilla/dom/MIDIAccessManager.h"
   9
  10 using namespace mozilla::dom;
  11
  12 MIDIManagerChild::MIDIManagerChild() : mShutdown(false) {}
  13
  14 mozilla::ipc::IPCResult MIDIManagerChild::RecvMIDIPortListUpdate(
  15     const MIDIPortList& aPortList) {
  16   MOZ_ASSERT(NS_IsMainThread());
  17   if (mShutdown) {
  18     return IPC_OK();
  19   }
  20   MOZ_ASSERT(MIDIAccessManager::IsRunning());
  21   MIDIAccessManager::Get()->Update(aPortList);
  22   return IPC_OK();
  23 }
  24
  25 void MIDIManagerChild::SetActorAlive() {
  26   // IPC Channels for MIDIManagers are created and managed by MIDIAccessManager,
  27   // so once the actor is created, we'll need to add a reference to keep it
  28   // alive until BackgroundChildImpl kills it.
  29   AddRef();
  30 }
  31
  32 void MIDIManagerChild::Shutdown() {
  33   MOZ_ASSERT(!mShutdown);
  34   mShutdown = true;
  35   SendShutdown();
  36 }