HID backend

device/hid/hid_connection_mac.h

Index: device/hid/hid_connection_mac.h
diff --git a/device/hid/hid_connection_mac.h b/device/hid/hid_connection_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..730eeae5452a67fc0c93ba6bb3a45bf969cabce0
--- /dev/null
+++ b/device/hid/hid_connection_mac.h
@@ -0,0 +1,77 @@
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DEVICE_HID_HID_CONNECTION_MAC_H_
+#define DEVICE_HID_HID_CONNECTION_MAC_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/tuple.h"
+#include "device/hid/hid_connection.h"
+#include "device/hid/hid_device_info.h"
+#include "device/hid/hid_service_mac.h"
+
+namespace net {
+class IOBuffer;
+}
+
+namespace device {
+
+class HidConnectionMac : public HidConnection {
+ public:
+  HidConnectionMac(HidServiceMac* service,
+                   HidDeviceInfo device_info,
+                   IOHIDDeviceRef device);
+
+  virtual void Read(scoped_refptr<net::IOBuffer> buffer,
+                    size_t size,
+                    const IOCallback& callback) OVERRIDE;
+  virtual void Write(scoped_refptr<net::IOBuffer> buffer,
+                     size_t size,
+                     const IOCallback& callback) OVERRIDE;
+  virtual void GetFeatureReport(scoped_refptr<net::IOBuffer> buffer,
+                                size_t size,
+                                const IOCallback& callback) OVERRIDE;
+  virtual void SendFeatureReport(scoped_refptr<net::IOBuffer> buffer,
+                                 size_t size,
+                                 const IOCallback& callback) OVERRIDE;
+
+ private:
+  virtual ~HidConnectionMac();
+
+  static void InputReportCallback(void * context,
+                                  IOReturn result,
+                                  void * sender,
+                                  IOHIDReportType type,
+                                  uint32_t reportID,
+                                  uint8_t * report,
+                                  CFIndex reportLength);
+  void ProcessReadQueue();
+  void ProcessInputReport(IOHIDReportType type,
+                          scoped_refptr<net::IOBuffer> report,
+                          CFIndex reportLength);
+
+  void WriteReport(IOHIDReportType type,
+                   scoped_refptr<net::IOBuffer> buffer,
+                   size_t size,
+                   const IOCallback& callback);
+
+  HidServiceMac* service_;
+  scoped_refptr<base::MessageLoopProxy> message_loop_;
+  base::ScopedCFTypeRef<IOHIDDeviceRef> device_;
+  scoped_ptr_malloc<uint8_t> inbound_buffer_;
+  bool disconnected_;
+
+  typedef std::pair<scoped_refptr<net::IOBuffer>, size_t> PendingReport;
+  std::queue<PendingReport> input_reports_;
+  typedef Tuple3<scoped_refptr<net::IOBuffer>, size_t, IOCallback> PendingRead;
+  std::queue<PendingRead> read_queue_;
+
+  DISALLOW_COPY_AND_ASSIGN(HidConnectionMac);
+};
+
+
+}  // namespace device
+
+#endif  // DEVICE_HID_HID_CONNECTION_MAC_H_