ios/web/app/web_main_loop.h

   1 // Copyright 2014 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 IOS_WEB_APP_WEB_MAIN_LOOP_H_
   6 #define IOS_WEB_APP_WEB_MAIN_LOOP_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11
  12 namespace base {
  13 class CommandLine;
  14 class FilePath;
  15 class MessageLoop;
  16 class PowerMonitor;
  17 class SystemMonitor;
  18 }  // namespace base
  19
  20 namespace net {
  21 class NetworkChangeNotifier;
  22 }  // namespace net
  23
  24 namespace web {
  25 class CookieNotificationBridge;
  26 class WebMainParts;
  27 class WebThreadImpl;
  28
  29 // Implements the main web loop stages called from WebMainRunner.
  30 // See comments in web_main_parts.h for additional info.
  31 class WebMainLoop {
  32  public:
  33   explicit WebMainLoop();
  34   virtual ~WebMainLoop();
  35
  36   void Init();
  37
  38   void EarlyInitialization();
  39   void MainMessageLoopStart();
  40
  41   // Creates and starts running the tasks needed to complete startup.
  42   void CreateStartupTasks();
  43
  44   // Performs the shutdown sequence, starting with PostMainMessageLoopRun
  45   // through stopping threads to PostDestroyThreads.
  46   void ShutdownThreadsAndCleanUp();
  47
  48   int GetResultCode() const { return result_code_; }
  49
  50  private:
  51   void InitializeMainThread();
  52
  53   // Called just before creating the threads
  54   int PreCreateThreads();
  55
  56   // Creates all secondary threads.
  57   int CreateThreads();
  58
  59   // Called right after the web threads have been started.
  60   int WebThreadsStarted();
  61
  62   // Called just before attaching to the main message loop.
  63   int PreMainMessageLoopRun();
  64
  65   // Members initialized on construction ---------------------------------------
  66   int result_code_;
  67   // True if the non-UI threads were created.
  68   bool created_threads_;
  69
  70   // Members initialized in |MainMessageLoopStart()| ---------------------------
  71   scoped_ptr<base::MessageLoop> main_message_loop_;
  72   scoped_ptr<base::SystemMonitor> system_monitor_;
  73   scoped_ptr<base::PowerMonitor> power_monitor_;
  74   scoped_ptr<net::NetworkChangeNotifier> network_change_notifier_;
  75
  76   // Destroy parts_ before main_message_loop_ (required) and before other
  77   // classes constructed in web (but after main_thread_).
  78   scoped_ptr<WebMainParts> parts_;
  79
  80   // Members initialized in |InitializeMainThread()| ---------------------------
  81   // This must get destroyed before other threads that are created in parts_.
  82   scoped_ptr<WebThreadImpl> main_thread_;
  83
  84   // Members initialized in |RunMainMessageLoopParts()| ------------------------
  85   scoped_ptr<WebThreadImpl> db_thread_;
  86   scoped_ptr<WebThreadImpl> file_user_blocking_thread_;
  87   scoped_ptr<WebThreadImpl> file_thread_;
  88   scoped_ptr<WebThreadImpl> cache_thread_;
  89   scoped_ptr<WebThreadImpl> io_thread_;
  90
  91   // Members initialized in |WebThreadsStarted()| --------------------------
  92   scoped_ptr<CookieNotificationBridge> cookie_notification_bridge_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(WebMainLoop);
  95 };
  96
  97 }  // namespace web
  98
  99 #endif  // IOS_WEB_APP_WEB_MAIN_LOOP_H_