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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_HID_HID_CONNECTION_H_
      6 #define DEVICE_HID_HID_CONNECTION_H_
      7 
      8 #include <stdint.h>
      9 
     10 #include "base/callback.h"
     11 #include "base/memory/ref_counted.h"
     12 #include "device/hid/hid_device_info.h"
     13 #include "net/base/io_buffer.h"
     14 
     15 namespace device {
     16 
     17 class HidConnection : public base::RefCountedThreadSafe<HidConnection> {
     18  public:
     19   typedef base::Callback<void(bool success, size_t size)> IOCallback;
     20 
     21   virtual void Read(scoped_refptr<net::IOBufferWithSize> buffer,
     22                     const IOCallback& callback) = 0;
     23   virtual void Write(uint8_t report_id,
     24                      scoped_refptr<net::IOBufferWithSize> buffer,
     25                      const IOCallback& callback) = 0;
     26   virtual void GetFeatureReport(uint8_t report_id,
     27                                 scoped_refptr<net::IOBufferWithSize> buffer,
     28                                 const IOCallback& callback) = 0;
     29   virtual void SendFeatureReport(uint8_t report_id,
     30                                  scoped_refptr<net::IOBufferWithSize> buffer,
     31                                  const IOCallback& callback) = 0;
     32 
     33   const HidDeviceInfo& device_info() const { return device_info_; }
     34 
     35  protected:
     36   friend class base::RefCountedThreadSafe<HidConnection>;
     37   friend struct HidDeviceInfo;
     38 
     39   explicit HidConnection(const HidDeviceInfo& device_info);
     40   virtual ~HidConnection();
     41 
     42  private:
     43   const HidDeviceInfo device_info_;
     44 
     45   DISALLOW_COPY_AND_ASSIGN(HidConnection);
     46 };
     47 
     48 struct PendingHidReport {
     49   PendingHidReport();
     50   ~PendingHidReport();
     51 
     52   scoped_refptr<net::IOBufferWithSize> buffer;
     53 };
     54 
     55 struct PendingHidRead {
     56   PendingHidRead();
     57   ~PendingHidRead();
     58 
     59   scoped_refptr<net::IOBufferWithSize> buffer;
     60   HidConnection::IOCallback callback;
     61 };
     62 
     63 }  // namespace device
     64 
     65 #endif  // DEVICE_HID_HID_CONNECTION_H_
     66