HID backend

device/hid/hid_service_mac.h

+// 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_SERVICE_MAC_H_
+#define DEVICE_HID_HID_SERVICE_MAC_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/mac/foundation_util.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/singleton.h"
+#include "base/message_loop/message_loop.h"
+#include "base/strings/string16.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/thread.h"
+#include "base/threading/thread_checker.h"
+#include "build/build_config.h"
+#include "device/hid/hid_device_info.h"
+#include "device/hid/hid_service.h"
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <IOKit/hid/IOHIDManager.h>
+
+namespace device {
+
+class HidConnection;
+class HidService;
+
+class HidServiceMac : public HidService {
+ public:
+  HidServiceMac();
+
+  virtual scoped_refptr<HidConnection> Connect(std::string device_id) OVERRIDE;
+
+ private:
+  virtual ~HidServiceMac();
+
+  void ScheduleRunLoop();
+  void UnscheduleRunLoop();
+
+  // Device changing callbacks.
+  static void AddDeviceCallback(void* context,
+                                IOReturn result,
+                                void* sender,
+                                IOHIDDeviceRef ref);
+  static void RemoveDeviceCallback(void* context,
+                                   IOReturn result,
+                                   void* sender,
+                                   IOHIDDeviceRef ref);
+  static HidServiceMac* InstanceFromContext(void* context);
+
+  IOHIDDeviceRef FindDevice(std::string id);

[Mark Mentovai, 2014/02/12 19:35:59]

The name “id” will cause trouble if this is #included into an Objective-C++
(.mm) file. Choose a different name. device_id is good, since that’s what you
used for Connect. Or you may want to use platform_device_id, since that’s what
the superclass uses in Connect. (Unless there’s a good reason to give an
argument a different name in a base and derived class declaration, give them the
same name. Gratuitous changes are confusing.)

+
+  void Enumerate();
+
+  void PlatformAddDevice(IOHIDDeviceRef ref);
+  void PlatformRemoveDevice(IOHIDDeviceRef ref);
+
+  // The message loop this object belongs to.
+  scoped_refptr<base::MessageLoopProxy> message_loop_;
+
+  // Platform HID Manager
+  base::ScopedCFTypeRef<IOHIDManagerRef> hid_manager_ref_;
+
+  // Enumeration thread.
+  scoped_ptr<base::Thread> enumeration_runloop_thread_;
+  CFRunLoopRef enumeration_runloop_;
+  base::WaitableEvent enumeration_runloop_init_;
+
+  bool available_;
+
+  DISALLOW_COPY_AND_ASSIGN(HidServiceMac);
+};
+
+}  // namespace device
+
+#endif  // DEVICE_HID_HID_SERVICE_MAC_H_