/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_ipc_BrowserProcessSubThread_h

#define mozilla_ipc_BrowserProcessSubThread_h

#include "base/thread.h"

#include "mozilla/StaticMutex.h"

#include "nsDebug.h"

namespace mozilla {

namespace ipc {

// Copied from browser_process_impl.cc, modified slightly.

class BrowserProcessSubThread : public base::Thread

{

public:

  // An enumeration of the well-known threads.

  enum ID {

      IO,

      //FILE,

      //DB,

      //HISTORY,

#if defined(OS_LINUX) || defined(OS_SOLARIS)

      // This thread has a second connection to the X server and is used

      // to process UI requests when routing the request to the UI

      // thread would risk deadlock.

      BACKGROUND_X11,

#endif

      // This identifier does not represent a thread.  Instead it counts

      // the number of well-known threads.  Insert new well-known

      // threads before this identifier.

      ID_COUNT

  };

  explicit BrowserProcessSubThread(ID aId);

  ~BrowserProcessSubThread();

  static MessageLoop* GetMessageLoop(ID identifier);

protected:

  virtual void Init() override;

  virtual void CleanUp() override;

private:

  // The identifier of this thread.  Only one thread can exist with a given

  // identifier at a given time.

  ID mIdentifier;

  // This lock protects |browser_threads_|.  Do not read or modify that array

  // without holding this lock.  Do not block while holding this lock.

  static StaticMutex sLock;

  // An array of the ChromeThread objects.  This array is protected by |lock_|.

  // The threads are not owned by this array.  Typically, the threads are owned

  // on the UI thread by the g_browser_process object.  ChromeThreads remove

  // themselves from this array upon destruction.

  static BrowserProcessSubThread* sBrowserThreads[ID_COUNT];

};

inline void AssertIOThread()

{

  NS_ASSERTION(MessageLoop::TYPE_IO == MessageLoop::current()->type(),

               "should be on the IO thread!");

}

} // namespace ipc

} // namespace mozilla

#endif // mozilla_ipc_BrowserProcessSubThread_h