src/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 PlatformClose() OVERRIDE;
  27   virtual void PlatformRead(const ReadCallback& callback) OVERRIDE;
  28   virtual void PlatformWrite(scoped_refptr<net::IOBuffer> buffer,
  29                              size_t size,
  30                              const WriteCallback& callback) OVERRIDE;
  31   virtual void PlatformGetFeatureReport(uint8_t report_id,
  32                                         const ReadCallback& callback) OVERRIDE;
  33   virtual void PlatformSendFeatureReport(
  34       scoped_refptr<net::IOBuffer> buffer,
  35       size_t size,
  36       const WriteCallback& callback) OVERRIDE;
  37
  38   // base::MessagePumpLibevent::Watcher implementation.
  39   virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
  40   virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
  41
  42   void Disconnect();
  43
  44   void Flush();
  45   void ProcessInputReport(scoped_refptr<net::IOBuffer> buffer, size_t size);
  46   void ProcessReadQueue();
  47
  48   base::File device_file_;
  49   base::MessagePumpLibevent::FileDescriptorWatcher device_file_watcher_;
  50
  51   std::queue<PendingHidReport> pending_reports_;
  52   std::queue<PendingHidRead> pending_reads_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(HidConnectionLinux);
  55 };
  56
  57 }  // namespace device
  58
  59 #endif  // DEVICE_HID_HID_CONNECTION_LINUX_H_