| // Copyright 2016 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_GENERIC_SENSOR_PLATFORM_SENSOR_PROVIDER_BASE_H_ |
| #define DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_PROVIDER_BASE_H_ |
| |
| #include "base/macros.h" |
| |
| #include "base/threading/non_thread_safe.h" |
| #include "device/generic_sensor/platform_sensor.h" |
| |
| namespace device { |
| |
| // Base class that defines factory methods for PlatformSensor creation. |
| // Its implementations must be accessed via GetInstance() method. |
| class PlatformSensorProviderBase : public base::NonThreadSafe { |
| public: |
| using CreateSensorCallback = |
| base::Callback<void(scoped_refptr<PlatformSensor>)>; |
| |
| // Creates new instance of PlatformSensor. |
| void CreateSensor(mojom::SensorType type, |
| const CreateSensorCallback& callback); |
| |
| // Gets previously created instance of PlatformSensor by sensor type |type|. |
| scoped_refptr<PlatformSensor> GetSensor(mojom::SensorType type); |
| |
| // Shared buffer getters. |
| mojo::ScopedSharedBufferHandle CloneSharedBufferHandle(); |
| |
| protected: |
| PlatformSensorProviderBase(); |
| virtual ~PlatformSensorProviderBase(); |
| |
| // Method that must be implemented by platform specific classes. |
| virtual void CreateSensorInternal(mojom::SensorType type, |
| mojo::ScopedSharedBufferMapping mapping, |
| const CreateSensorCallback& callback) = 0; |
| |
| private: |
| friend class PlatformSensor; // To call RemoveSensor(); |
| |
| bool CreateSharedBufferIfNeeded(); |
| void RemoveSensor(mojom::SensorType type); |
| void NotifySensorCreated(mojom::SensorType type, |
| scoped_refptr<PlatformSensor> sensor); |
| |
| private: |
| using CallbackQueue = std::vector<CreateSensorCallback>; |
| |
| std::map<mojom::SensorType, PlatformSensor*> sensor_map_; |
| std::map<mojom::SensorType, CallbackQueue> requests_map_; |
| mojo::ScopedSharedBufferHandle shared_buffer_handle_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PlatformSensorProviderBase); |
| }; |
| |
| } // namespace device |
| |
| #endif // DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_PROVIDER_BASE_H_ |