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/files/file_path.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/timer/timer.h"
  13 #include "content/browser/browser_process_sub_thread.h"
  14 #include "content/public/browser/browser_main_runner.h"
  15
  16 namespace base {
  17 class CommandLine;
  18 class FilePath;
  19 class HighResolutionTimerManager;
  20 class MessageLoop;
  21 class PowerMonitor;
  22 class SystemMonitor;
  23 class MemoryPressureMonitor;
  24 namespace trace_event {
  25 class TraceMemoryController;
  26 class TraceEventSystemStatsMonitor;
  27 }  // namespace trace_event
  28 }  // namespace base
  29
  30 namespace media {
  31 class AudioManager;
  32 class UserInputMonitor;
  33 namespace midi {
  34 class MidiManager;
  35 }  // namespace midi
  36 }  // namespace media
  37
  38 namespace net {
  39 class NetworkChangeNotifier;
  40 }  // namespace net
  41
  42 namespace content {
  43 class BrowserMainParts;
  44 class BrowserOnlineStateObserver;
  45 class BrowserShutdownImpl;
  46 class BrowserThreadImpl;
  47 class MediaStreamManager;
  48 class ResourceDispatcherHostImpl;
  49 class SpeechRecognitionManagerImpl;
  50 class StartupTaskRunner;
  51 class TimeZoneMonitor;
  52 struct MainFunctionParams;
  53
  54 #if defined(OS_ANDROID)
  55 class ScreenOrientationDelegate;
  56 #elif defined(OS_LINUX)
  57 class DeviceMonitorLinux;
  58 #elif defined(OS_MACOSX)
  59 class DeviceMonitorMac;
  60 #elif defined(OS_WIN)
  61 class SystemMessageWindowWin;
  62 #endif
  63
  64 // Implements the main browser loop stages called from BrowserMainRunner.
  65 // See comments in browser_main_parts.h for additional info.
  66 class CONTENT_EXPORT BrowserMainLoop {
  67  public:
  68   // Returns the current instance. This is used to get access to the getters
  69   // that return objects which are owned by this class.
  70   static BrowserMainLoop* GetInstance();
  71
  72   explicit BrowserMainLoop(const MainFunctionParams& parameters);
  73   virtual ~BrowserMainLoop();
  74
  75   void Init();
  76
  77   void EarlyInitialization();
  78   // Initializes the toolkit. Returns whether the toolkit initialization was
  79   // successful or not.
  80   bool InitializeToolkit();
  81   void MainMessageLoopStart();
  82
  83   // Create and start running the tasks we need to complete startup. Note that
  84   // this can be called more than once (currently only on Android) if we get a
  85   // request for synchronous startup while the tasks created by asynchronous
  86   // startup are still running.
  87   void CreateStartupTasks();
  88
  89   // Perform the default message loop run logic.
  90   void RunMainMessageLoopParts();
  91
  92   // Performs the shutdown sequence, starting with PostMainMessageLoopRun
  93   // through stopping threads to PostDestroyThreads.
  94   void ShutdownThreadsAndCleanUp();
  95
  96   int GetResultCode() const { return result_code_; }
  97
  98   media::AudioManager* audio_manager() const { return audio_manager_.get(); }
  99   MediaStreamManager* media_stream_manager() const {
 100     return media_stream_manager_.get();
 101   }
 102   media::UserInputMonitor* user_input_monitor() const {
 103     return user_input_monitor_.get();
 104   }
 105   media::midi::MidiManager* midi_manager() const { return midi_manager_.get(); }
 106   base::Thread* indexed_db_thread() const { return indexed_db_thread_.get(); }
 107
 108   bool is_tracing_startup() const { return is_tracing_startup_; }
 109
 110   const base::FilePath& startup_trace_file() const {
 111     return startup_trace_file_;
 112   }
 113
 114   void StopStartupTracingTimer();
 115
 116 #if defined(OS_MACOSX) && !defined(OS_IOS)
 117   DeviceMonitorMac* device_monitor_mac() const {
 118     return device_monitor_mac_.get();
 119   }
 120 #endif
 121
 122  private:
 123   class MemoryObserver;
 124   // For ShutdownThreadsAndCleanUp.
 125   friend class BrowserShutdownImpl;
 126
 127   void InitializeMainThread();
 128
 129   // Called just before creating the threads
 130   int PreCreateThreads();
 131
 132   // Create all secondary threads.
 133   int CreateThreads();
 134
 135   // Called right after the browser threads have been started.
 136   int BrowserThreadsStarted();
 137
 138   int PreMainMessageLoopRun();
 139
 140   void MainMessageLoopRun();
 141
 142   base::FilePath GetStartupTraceFileName(
 143       const base::CommandLine& command_line) const;
 144   void InitStartupTracing(const base::CommandLine& command_line);
 145   void EndStartupTracing();
 146
 147   bool UsingInProcessGpu() const;
 148   void InitializeGpuDataManager();
 149
 150   // Members initialized on construction ---------------------------------------
 151   const MainFunctionParams& parameters_;
 152   const base::CommandLine& parsed_command_line_;
 153   int result_code_;
 154   // True if the non-UI threads were created.
 155   bool created_threads_;
 156
 157   // Members initialized in |MainMessageLoopStart()| ---------------------------
 158   scoped_ptr<base::MessageLoop> main_message_loop_;
 159   scoped_ptr<base::SystemMonitor> system_monitor_;
 160   scoped_ptr<base::PowerMonitor> power_monitor_;
 161   scoped_ptr<base::HighResolutionTimerManager> hi_res_timer_manager_;
 162   scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
 163   // user_input_monitor_ has to outlive audio_manager_, so declared first.
 164   scoped_ptr<media::UserInputMonitor> user_input_monitor_;
 165   scoped_ptr<media::AudioManager> audio_manager_;
 166   scoped_ptr<media::midi::MidiManager> midi_manager_;
 167   scoped_ptr<MediaStreamManager> media_stream_manager_;
 168   // Per-process listener for online state changes.
 169   scoped_ptr<BrowserOnlineStateObserver> online_state_observer_;
 170 #if defined(OS_WIN)
 171   scoped_ptr<SystemMessageWindowWin> system_message_window_;
 172 #elif defined(USE_UDEV)
 173   scoped_ptr<DeviceMonitorLinux> device_monitor_linux_;
 174 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 175   scoped_ptr<DeviceMonitorMac> device_monitor_mac_;
 176 #endif
 177 #if defined(OS_ANDROID)
 178   // Android implementation of ScreenOrientationDelegate
 179   scoped_ptr<ScreenOrientationDelegate> screen_orientation_delegate_;
 180 #endif
 181
 182   // Memory pressure monitor. Created in PreCreateThreads and torn down in
 183   // ShutdownThreadsAndCleanUp.
 184   scoped_ptr<base::MemoryPressureMonitor> memory_pressure_monitor_;
 185
 186   // The startup task runner is created by CreateStartupTasks()
 187   scoped_ptr<StartupTaskRunner> startup_task_runner_;
 188
 189   // Destroy parts_ before main_message_loop_ (required) and before other
 190   // classes constructed in content (but after main_thread_).
 191   scoped_ptr<BrowserMainParts> parts_;
 192
 193   // Members initialized in |InitializeMainThread()| ---------------------------
 194   // This must get destroyed before other threads that are created in parts_.
 195   scoped_ptr<BrowserThreadImpl> main_thread_;
 196
 197   // Members initialized in |BrowserThreadsStarted()| --------------------------
 198   scoped_ptr<ResourceDispatcherHostImpl> resource_dispatcher_host_;
 199   scoped_ptr<SpeechRecognitionManagerImpl> speech_recognition_manager_;
 200   scoped_ptr<TimeZoneMonitor> time_zone_monitor_;
 201
 202   // Members initialized in |RunMainMessageLoopParts()| ------------------------
 203   scoped_ptr<BrowserProcessSubThread> db_thread_;
 204   scoped_ptr<BrowserProcessSubThread> file_user_blocking_thread_;
 205   scoped_ptr<BrowserProcessSubThread> file_thread_;
 206   scoped_ptr<BrowserProcessSubThread> process_launcher_thread_;
 207   scoped_ptr<BrowserProcessSubThread> cache_thread_;
 208   scoped_ptr<BrowserProcessSubThread> io_thread_;
 209   scoped_ptr<base::Thread> indexed_db_thread_;
 210   scoped_ptr<MemoryObserver> memory_observer_;
 211   scoped_ptr<base::trace_event::TraceMemoryController> trace_memory_controller_;
 212   scoped_ptr<base::trace_event::TraceEventSystemStatsMonitor>
 213       system_stats_monitor_;
 214
 215   bool is_tracing_startup_;
 216   base::FilePath startup_trace_file_;
 217
 218   // This timer initiates trace file saving.
 219   base::OneShotTimer<BrowserMainLoop> startup_trace_timer_;
 220
 221   DISALLOW_COPY_AND_ASSIGN(BrowserMainLoop);
 222 };
 223
 224 }  // namespace content
 225
 226 #endif  // CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_