content/browser/browser_process_sub_thread.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_PROCESS_SUB_THREAD_H_
   6 #define CONTENT_BROWSER_BROWSER_PROCESS_SUB_THREAD_H_
   7
   8 #include "base/basictypes.h"
   9 #include "content/browser/browser_thread_impl.h"
  10 #include "content/common/content_export.h"
  11
  12 #if defined(OS_WIN)
  13 namespace base {
  14 namespace win {
  15 class ScopedCOMInitializer;
  16 }
  17 }
  18 #endif
  19
  20 namespace content {
  21 class NotificationService;
  22 }
  23
  24 namespace content {
  25
  26 // ----------------------------------------------------------------------------
  27 // BrowserProcessSubThread
  28 //
  29 // This simple thread object is used for the specialized threads that the
  30 // BrowserProcess spins up.
  31 //
  32 // Applications must initialize the COM library before they can call
  33 // COM library functions other than CoGetMalloc and memory allocation
  34 // functions, so this class initializes COM for those users.
  35 class CONTENT_EXPORT BrowserProcessSubThread : public BrowserThreadImpl {
  36  public:
  37   explicit BrowserProcessSubThread(BrowserThread::ID identifier);
  38   ~BrowserProcessSubThread() override;
  39
  40  protected:
  41   void Init() override;
  42   void CleanUp() override;
  43
  44  private:
  45   // These methods encapsulate cleanup that needs to happen on the IO thread
  46   // before we call the embedder's CleanUp function.
  47   void IOThreadPreCleanUp();
  48
  49 #if defined (OS_WIN)
  50   scoped_ptr<base::win::ScopedCOMInitializer> com_initializer_;
  51 #endif
  52
  53   // Each specialized thread has its own notification service.
  54   scoped_ptr<NotificationService> notification_service_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(BrowserProcessSubThread);
  57 };
  58
  59 }  // namespace content
  60
  61 #endif  // CONTENT_BROWSER_BROWSER_PROCESS_SUB_THREAD_H_