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Diffstat (limited to 'device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h')
-rw-r--r-- | device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h b/device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h new file mode 100644 index 0000000..361b319 --- /dev/null +++ b/device/bluetooth/bluetooth_remote_gatt_characteristic_chromeos.h @@ -0,0 +1,150 @@ +// Copyright 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_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_CHROMEOS_H_ +#define DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_CHROMEOS_H_ + +#include <map> +#include <queue> +#include <string> +#include <utility> +#include <vector> + +#include "base/memory/weak_ptr.h" +#include "dbus/object_path.h" +#include "device/bluetooth/bluetooth_gatt_characteristic.h" +#include "device/bluetooth/bluetooth_uuid.h" +#include "device/bluetooth/dbus/bluetooth_gatt_descriptor_client.h" + +namespace device { + +class BluetoothGattDescriptor; +class BluetoothGattService; + +} // namespace device + +namespace chromeos { + +class BluetoothRemoteGattDescriptorChromeOS; +class BluetoothRemoteGattServiceChromeOS; + +// The BluetoothRemoteGattCharacteristicChromeOS class implements +// BluetoothGattCharacteristic for remote GATT characteristics on the Chrome OS +// platform. +class BluetoothRemoteGattCharacteristicChromeOS + : public device::BluetoothGattCharacteristic, + public bluez::BluetoothGattDescriptorClient::Observer { + public: + // device::BluetoothGattCharacteristic overrides. + std::string GetIdentifier() const override; + device::BluetoothUUID GetUUID() const override; + bool IsLocal() const override; + const std::vector<uint8>& GetValue() const override; + device::BluetoothGattService* GetService() const override; + Properties GetProperties() const override; + Permissions GetPermissions() const override; + bool IsNotifying() const override; + std::vector<device::BluetoothGattDescriptor*> GetDescriptors() const override; + device::BluetoothGattDescriptor* GetDescriptor( + const std::string& identifier) const override; + bool AddDescriptor(device::BluetoothGattDescriptor* descriptor) override; + bool UpdateValue(const std::vector<uint8>& value) override; + void ReadRemoteCharacteristic(const ValueCallback& callback, + const ErrorCallback& error_callback) override; + void WriteRemoteCharacteristic(const std::vector<uint8>& new_value, + const base::Closure& callback, + const ErrorCallback& error_callback) override; + void StartNotifySession(const NotifySessionCallback& callback, + const ErrorCallback& error_callback) override; + + // Removes one value update session and invokes |callback| on completion. This + // decrements the session reference count by 1 and if the number reaches 0, + // makes a call to the subsystem to stop notifications from this + // characteristic. + void RemoveNotifySession(const base::Closure& callback); + + // Object path of the underlying D-Bus characteristic. + const dbus::ObjectPath& object_path() const { return object_path_; } + + private: + friend class BluetoothRemoteGattServiceChromeOS; + + typedef std::pair<NotifySessionCallback, ErrorCallback> + PendingStartNotifyCall; + + BluetoothRemoteGattCharacteristicChromeOS( + BluetoothRemoteGattServiceChromeOS* service, + const dbus::ObjectPath& object_path); + ~BluetoothRemoteGattCharacteristicChromeOS() override; + + // bluez::BluetoothGattDescriptorClient::Observer overrides. + void GattDescriptorAdded(const dbus::ObjectPath& object_path) override; + void GattDescriptorRemoved(const dbus::ObjectPath& object_path) override; + void GattDescriptorPropertyChanged(const dbus::ObjectPath& object_path, + const std::string& property_name) override; + + // Called by dbus:: on unsuccessful completion of a request to read or write + // the characteristic value. + void OnError(const ErrorCallback& error_callback, + const std::string& error_name, + const std::string& error_message); + + // Called by dbus:: on successful completion of a request to start + // notifications. + void OnStartNotifySuccess(const NotifySessionCallback& callback); + + // Called by dbus:: on unsuccessful completion of a request to start + // notifications. + void OnStartNotifyError(const ErrorCallback& error_callback, + const std::string& error_name, + const std::string& error_message); + + // Called by dbus:: on successful completion of a request to stop + // notifications. + void OnStopNotifySuccess(const base::Closure& callback); + + // Called by dbus:: on unsuccessful completion of a request to stop + // notifications. + void OnStopNotifyError(const base::Closure& callback, + const std::string& error_name, + const std::string& error_message); + + // Calls StartNotifySession for each queued request. + void ProcessStartNotifyQueue(); + + // Object path of the D-Bus characteristic object. + dbus::ObjectPath object_path_; + + // The GATT service this GATT characteristic belongs to. + BluetoothRemoteGattServiceChromeOS* service_; + + // The total number of currently active value update sessions. + size_t num_notify_sessions_; + + // Calls to StartNotifySession that are pending. This can happen during the + // first remote call to start notifications. + std::queue<PendingStartNotifyCall> pending_start_notify_calls_; + + // True, if a Start or Stop notify call to bluetoothd is currently pending. + bool notify_call_pending_; + + // Mapping from GATT descriptor object paths to descriptor objects owned by + // this characteristic. Since the Chrome OS implementation uses object paths + // as unique identifiers, we also use this mapping to return descriptors by + // identifier. + typedef std::map<dbus::ObjectPath, BluetoothRemoteGattDescriptorChromeOS*> + DescriptorMap; + DescriptorMap descriptors_; + + // Note: This should remain the last member so it'll be destroyed and + // invalidate its weak pointers before any other members are destroyed. + base::WeakPtrFactory<BluetoothRemoteGattCharacteristicChromeOS> + weak_ptr_factory_; + + DISALLOW_COPY_AND_ASSIGN(BluetoothRemoteGattCharacteristicChromeOS); +}; + +} // namespace chromeos + +#endif // DEVICE_BLUETOOTH_BLUETOOTH_REMOTE_GATT_CHARACTERISTIC_CHROMEOS_H_ |