device/hid/hid_connection_linux.h

   1 // Copyright (c) 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_LINUX_H_
   6 #define DEVICE_HID_HID_CONNECTION_LINUX_H_
   7
   8 #include <queue>
   9
  10 #include "base/files/file.h"
  11 #include "base/message_loop/message_pump_libevent.h"
  12 #include "device/hid/hid_connection.h"
  13
  14 namespace device {
  15
  16 class HidConnectionLinux : public HidConnection,
  17                            public base::MessagePumpLibevent::Watcher {
  18  public:
  19   HidConnectionLinux(HidDeviceInfo device_info, std::string dev_node);
  20
  21  private:
  22   friend class base::RefCountedThreadSafe<HidConnectionLinux>;
  23   virtual ~HidConnectionLinux();
  24
  25   // HidConnection implementation.
  26   virtual void PlatformRead(const ReadCallback& callback) OVERRIDE;
  27   virtual void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
  28                              size_t size,
  29                              const WriteCallback& callback) OVERRIDE;
  30   virtual void PlatformGetFeatureReport(uint8_t report_id,
  31                                         const ReadCallback& callback) OVERRIDE;
  32   virtual void PlatformSendFeatureReport(
  33       scoped_refptr<net::IOBuffer> buffer,
  34       size_t size,
  35       const WriteCallback& callback) OVERRIDE;
  36
  37   // base::MessagePumpLibevent::Watcher implementation.
  38   virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
  39   virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
  40
  41   void Disconnect();
  42
  43   void Flush();
  44   void ProcessInputReport(scoped_refptr<net::IOBuffer> buffer, size_t size);
  45   void ProcessReadQueue();
  46
  47   base::File device_file_;
  48   base::MessagePumpLibevent::FileDescriptorWatcher device_file_watcher_;
  49
  50   std::queue<PendingHidReport> pending_reports_;
  51   std::queue<PendingHidRead> pending_reads_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(HidConnectionLinux);
  54 };
  55
  56 }  // namespace device
  57
  58 #endif  // DEVICE_HID_HID_CONNECTION_LINUX_H_