Bluetooth: mac: Working on macOS descriptor implementation.

device/bluetooth/bluetooth_remote_gatt_descriptor_mac.h

+// Copyright 2017 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_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_MAC_H_
+#define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_DESCRIPTOR_MAC_H_
+
+#include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
+
+#include <vector>
+
+#include "base/mac/scoped_nsobject.h"
+#include "base/memory/weak_ptr.h"
+
+#if defined(__OBJC__)
+#import <CoreBluetooth/CoreBluetooth.h>
+#endif  // defined(__OBJC__)
+
+namespace device {
+
+class BluetoothRemoteGattCharacteristicMac;
+
+// The BluetoothRemoteGattDescriptorMac class implements
+// BluetoothRemoteGattDescriptor for remote GATT services on macOS.
+class DEVICE_BLUETOOTH_EXPORT BluetoothRemoteGattDescriptorMac
+    : public BluetoothRemoteGattDescriptor {
+ public:
+  BluetoothRemoteGattDescriptorMac(
+      BluetoothRemoteGattCharacteristicMac* characteristic,
+      CBDescriptor* descriptor);
+  ~BluetoothRemoteGattDescriptorMac() override;
+
+  // BluetoothGattDescriptor
+  std::string GetIdentifier() const override;
+  BluetoothUUID GetUUID() const override;
+  BluetoothGattCharacteristic::Permissions GetPermissions() const override;
+  // BluetoothRemoteGattDescriptor
+  const std::vector<uint8_t>& GetValue() const override;
+  BluetoothRemoteGattCharacteristic* GetCharacteristic() const override;
+  void ReadRemoteDescriptor(const ValueCallback& callback,
+                            const ErrorCallback& error_callback) override;
+  void WriteRemoteDescriptor(const std::vector<uint8_t>& new_value,
+                             const base::Closure& callback,
+                             const ErrorCallback& error_callback) override;
+
+ private:
+  friend class BluetoothRemoteGattCharacteristicMac;
+
+  // Returns CoreBluetooth descriptor.
+  CBDescriptor* GetCBDescriptor() const;
+  // gatt_characteristic_ owns instances of this class.
+  BluetoothRemoteGattCharacteristicMac* gatt_characteristic_;
+  // Descriptor from CoreBluetooth.
+  base::scoped_nsobject<CBDescriptor> cb_descriptor_;
+  // Descriptor identifier.
+  std::string identifier_;
+  // Descriptor UUID.
+  BluetoothUUID uuid_;
+  // Descriptor value.
+  std::vector<uint8_t> value_;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_MAC_H_