media/audio/audio_manager.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/audio/audio_manager.h"
   6
   7 #include "base/at_exit.h"
   8 #include "base/atomicops.h"
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/logging.h"
  12 #include "base/message_loop/message_loop.h"
  13
  14 namespace media {
  15 namespace {
  16 AudioManager* g_last_created = NULL;
  17 }
  18
  19 // Forward declaration of the platform specific AudioManager factory function.
  20 AudioManager* CreateAudioManager();
  21
  22 AudioManager::AudioManager() {
  23 }
  24
  25 AudioManager::~AudioManager() {
  26   CHECK(g_last_created == NULL || g_last_created == this);
  27   g_last_created = NULL;
  28 }
  29
  30 // static
  31 AudioManager* AudioManager::Create() {
  32   CHECK(g_last_created == NULL);
  33   g_last_created = CreateAudioManager();
  34   return g_last_created;
  35 }
  36
  37 // static
  38 AudioManager* AudioManager::Get() {
  39   return g_last_created;
  40 }
  41
  42 }  // namespace media