content/browser/browser_main_loop.h

   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 #ifndef CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_
   6 #define CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "content/browser/browser_process_sub_thread.h"
  12 #include "content/public/browser/browser_main_runner.h"
  13
  14 namespace base {
  15 class CommandLine;
  16 class FilePath;
  17 class HighResolutionTimerManager;
  18 class MessageLoop;
  19 class PowerMonitor;
  20 class SystemMonitor;
  21 namespace debug {
  22 class TraceMemoryController;
  23 class TraceEventSystemStatsMonitor;
  24 }  // namespace debug
  25 }  // namespace base
  26
  27 namespace media {
  28 class AudioManager;
  29 class MidiManager;
  30 class UserInputMonitor;
  31 }  // namespace media
  32
  33 namespace net {
  34 class NetworkChangeNotifier;
  35 }  // namespace net
  36
  37 namespace content {
  38 class AudioMirroringManager;
  39 class BrowserMainParts;
  40 class BrowserOnlineStateObserver;
  41 class BrowserShutdownImpl;
  42 class BrowserThreadImpl;
  43 class MediaStreamManager;
  44 class ResourceDispatcherHostImpl;
  45 class SpeechRecognitionManagerImpl;
  46 class StartupTaskRunner;
  47 class TimeZoneMonitor;
  48 struct MainFunctionParams;
  49
  50 #if defined(OS_LINUX)
  51 class DeviceMonitorLinux;
  52 #elif defined(OS_MACOSX)
  53 class DeviceMonitorMac;
  54 #elif defined(OS_WIN)
  55 class SystemMessageWindowWin;
  56 #endif
  57
  58 // Implements the main browser loop stages called from BrowserMainRunner.
  59 // See comments in browser_main_parts.h for additional info.
  60 class CONTENT_EXPORT BrowserMainLoop {
  61  public:
  62   // Returns the current instance. This is used to get access to the getters
  63   // that return objects which are owned by this class.
  64   static BrowserMainLoop* GetInstance();
  65
  66   explicit BrowserMainLoop(const MainFunctionParams& parameters);
  67   virtual ~BrowserMainLoop();
  68
  69   void Init();
  70
  71   void EarlyInitialization();
  72   // Initializes the toolkit. Returns whether the toolkit initialization was
  73   // successful or not.
  74   bool InitializeToolkit();
  75   void MainMessageLoopStart();
  76
  77   // Create and start running the tasks we need to complete startup. Note that
  78   // this can be called more than once (currently only on Android) if we get a
  79   // request for synchronous startup while the tasks created by asynchronous
  80   // startup are still running.
  81   void CreateStartupTasks();
  82
  83   // Perform the default message loop run logic.
  84   void RunMainMessageLoopParts();
  85
  86   // Performs the shutdown sequence, starting with PostMainMessageLoopRun
  87   // through stopping threads to PostDestroyThreads.
  88   void ShutdownThreadsAndCleanUp();
  89
  90   int GetResultCode() const { return result_code_; }
  91
  92   media::AudioManager* audio_manager() const { return audio_manager_.get(); }
  93   AudioMirroringManager* audio_mirroring_manager() const {
  94     return audio_mirroring_manager_.get();
  95   }
  96   MediaStreamManager* media_stream_manager() const {
  97     return media_stream_manager_.get();
  98   }
  99   media::UserInputMonitor* user_input_monitor() const {
 100     return user_input_monitor_.get();
 101   }
 102   media::MidiManager* midi_manager() const { return midi_manager_.get(); }
 103   base::Thread* indexed_db_thread() const { return indexed_db_thread_.get(); }
 104
 105   bool is_tracing_startup() const { return is_tracing_startup_; }
 106
 107 #if defined(OS_MACOSX) && !defined(OS_IOS)
 108   DeviceMonitorMac* device_monitor_mac() const {
 109     return device_monitor_mac_.get();
 110   }
 111 #endif
 112
 113  private:
 114   class MemoryObserver;
 115   // For ShutdownThreadsAndCleanUp.
 116   friend class BrowserShutdownImpl;
 117
 118   void InitializeMainThread();
 119
 120   // Called just before creating the threads
 121   int PreCreateThreads();
 122
 123   // Create all secondary threads.
 124   int CreateThreads();
 125
 126   // Called right after the browser threads have been started.
 127   int BrowserThreadsStarted();
 128
 129   int PreMainMessageLoopRun();
 130
 131   void MainMessageLoopRun();
 132
 133   void InitStartupTracing(const base::CommandLine& command_line);
 134   void EndStartupTracing(const base::FilePath& trace_file);
 135
 136   // Members initialized on construction ---------------------------------------
 137   const MainFunctionParams& parameters_;
 138   const base::CommandLine& parsed_command_line_;
 139   int result_code_;
 140   // True if the non-UI threads were created.
 141   bool created_threads_;
 142
 143   // Members initialized in |MainMessageLoopStart()| ---------------------------
 144   scoped_ptr<base::MessageLoop> main_message_loop_;
 145   scoped_ptr<base::SystemMonitor> system_monitor_;
 146   scoped_ptr<base::PowerMonitor> power_monitor_;
 147   scoped_ptr<base::HighResolutionTimerManager> hi_res_timer_manager_;
 148   scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
 149   // user_input_monitor_ has to outlive audio_manager_, so declared first.
 150   scoped_ptr<media::UserInputMonitor> user_input_monitor_;
 151   scoped_ptr<media::AudioManager> audio_manager_;
 152   scoped_ptr<media::MidiManager> midi_manager_;
 153   scoped_ptr<AudioMirroringManager> audio_mirroring_manager_;
 154   scoped_ptr<MediaStreamManager> media_stream_manager_;
 155   // Per-process listener for online state changes.
 156   scoped_ptr<BrowserOnlineStateObserver> online_state_observer_;
 157 #if defined(OS_WIN)
 158   scoped_ptr<SystemMessageWindowWin> system_message_window_;
 159 #elif defined(USE_UDEV)
 160   scoped_ptr<DeviceMonitorLinux> device_monitor_linux_;
 161 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 162   scoped_ptr<DeviceMonitorMac> device_monitor_mac_;
 163 #endif
 164   // The startup task runner is created by CreateStartupTasks()
 165   scoped_ptr<StartupTaskRunner> startup_task_runner_;
 166
 167   // Destroy parts_ before main_message_loop_ (required) and before other
 168   // classes constructed in content (but after main_thread_).
 169   scoped_ptr<BrowserMainParts> parts_;
 170
 171   // Members initialized in |InitializeMainThread()| ---------------------------
 172   // This must get destroyed before other threads that are created in parts_.
 173   scoped_ptr<BrowserThreadImpl> main_thread_;
 174
 175   // Members initialized in |BrowserThreadsStarted()| --------------------------
 176   scoped_ptr<ResourceDispatcherHostImpl> resource_dispatcher_host_;
 177   scoped_ptr<SpeechRecognitionManagerImpl> speech_recognition_manager_;
 178   scoped_ptr<TimeZoneMonitor> time_zone_monitor_;
 179
 180   // Members initialized in |RunMainMessageLoopParts()| ------------------------
 181   scoped_ptr<BrowserProcessSubThread> db_thread_;
 182   scoped_ptr<BrowserProcessSubThread> file_user_blocking_thread_;
 183   scoped_ptr<BrowserProcessSubThread> file_thread_;
 184   scoped_ptr<BrowserProcessSubThread> process_launcher_thread_;
 185   scoped_ptr<BrowserProcessSubThread> cache_thread_;
 186   scoped_ptr<BrowserProcessSubThread> io_thread_;
 187   scoped_ptr<base::Thread> indexed_db_thread_;
 188   scoped_ptr<MemoryObserver> memory_observer_;
 189   scoped_ptr<base::debug::TraceMemoryController> trace_memory_controller_;
 190   scoped_ptr<base::debug::TraceEventSystemStatsMonitor> system_stats_monitor_;
 191
 192   bool is_tracing_startup_;
 193
 194   DISALLOW_COPY_AND_ASSIGN(BrowserMainLoop);
 195 };
 196
 197 }  // namespace content
 198
 199 #endif  // CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_