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      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 DEVICE_BLUETOOTH_BLUETOOTH_SOCKET_THREAD_H_
      6 #define DEVICE_BLUETOOTH_BLUETOOTH_SOCKET_THREAD_H_
      7 
      8 #include "base/memory/ref_counted.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/threading/thread_checker.h"
     11 
     12 namespace base {
     13 class SequencedTaskRunner;
     14 class Thread;
     15 }  // namespace base
     16 
     17 namespace device {
     18 
     19 // Thread abstraction used by |BluetoothSocketChromeOS| and |BluetoothSocketWin|
     20 // to perform IO operations on the underlying platform sockets. An instance of
     21 // this class can be shared by many active sockets.
     22 class BluetoothSocketThread
     23     : public base::RefCountedThreadSafe<BluetoothSocketThread> {
     24  public:
     25   static scoped_refptr<BluetoothSocketThread> Get();
     26   static void CleanupForTesting();
     27 
     28   void OnSocketActivate();
     29   void OnSocketDeactivate();
     30 
     31   scoped_refptr<base::SequencedTaskRunner> task_runner() const;
     32 
     33  private:
     34   friend class base::RefCountedThreadSafe<BluetoothSocketThread>;
     35   BluetoothSocketThread();
     36   virtual ~BluetoothSocketThread();
     37 
     38   void EnsureStarted();
     39 
     40   base::ThreadChecker thread_checker_;
     41   int active_socket_count_;
     42   scoped_ptr<base::Thread> thread_;
     43   scoped_refptr<base::SequencedTaskRunner> task_runner_;
     44 
     45   DISALLOW_COPY_AND_ASSIGN(BluetoothSocketThread);
     46 };
     47 
     48 }  // namespace device
     49 
     50 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_SOCKET_THREAD_H_
     51