ipc/glue/BrowserProcessSubThread.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_ipc_BrowserProcessSubThread_h
   8 #define mozilla_ipc_BrowserProcessSubThread_h
   9
  10 #include "base/thread.h"
  11 #include "mozilla/StaticMutex.h"
  12
  13 #include "nsDebug.h"
  14
  15 namespace mozilla {
  16 namespace ipc {
  17
  18 // Copied from browser_process_impl.cc, modified slightly.
  19 class BrowserProcessSubThread : public base::Thread {
  20  public:
  21   // An enumeration of the well-known threads.
  22   enum ID {
  23     IO,
  24
  25     // This identifier does not represent a thread.  Instead it counts
  26     // the number of well-known threads.  Insert new well-known
  27     // threads before this identifier.
  28     ID_COUNT
  29   };
  30
  31   explicit BrowserProcessSubThread(ID aId);
  32   ~BrowserProcessSubThread();
  33
  34   static MessageLoop* GetMessageLoop(ID identifier);
  35
  36  protected:
  37   virtual void Init() override;
  38   virtual void CleanUp() override;
  39
  40  private:
  41   // The identifier of this thread.  Only one thread can exist with a given
  42   // identifier at a given time.
  43   ID mIdentifier;
  44
  45   // This lock protects |browser_threads_|.  Do not read or modify that array
  46   // without holding this lock.  Do not block while holding this lock.
  47
  48   static StaticMutex sLock;
  49
  50   // An array of the ChromeThread objects.  This array is protected by |lock_|.
  51   // The threads are not owned by this array.  Typically, the threads are owned
  52   // on the UI thread by the g_browser_process object.  ChromeThreads remove
  53   // themselves from this array upon destruction.
  54   static BrowserProcessSubThread* sBrowserThreads[ID_COUNT] MOZ_GUARDED_BY(
  55       sLock);
  56 };
  57
  58 inline void AssertIOThread() {
  59   NS_ASSERTION(MessageLoop::TYPE_IO == MessageLoop::current()->type(),
  60                "should be on the IO thread!");
  61 }
  62
  63 }  // namespace ipc
  64 }  // namespace mozilla
  65
  66 #endif  // mozilla_ipc_BrowserProcessSubThread_h