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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef SensorPollingStrategy_h | 5 #ifndef SensorPollingStrategy_h |
| 6 #define SensorPollingStrategy_h | 6 #define SensorPollingStrategy_h |
| 7 | 7 |
| 8 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h" | 8 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h" |
| 9 #include "platform/Timer.h" | 9 #include "platform/Timer.h" |
| 10 #include "platform/heap/Handle.h" | 10 #include "platform/heap/Handle.h" |
| 11 #include "wtf/Functional.h" | 11 #include "wtf/Functional.h" |
| 12 | 12 |
| 13 namespace blink { | 13 namespace blink { |
| 14 | 14 |
| 15 // This class provides different polling behaviour depending on | 15 // This class provides different polling behaviour depending on |
| 16 // the given 'ReportingMode': | 16 // the given 'ReportingMode': |
| 17 // - for 'CONTINUOUS' mode the polling function is invoked periodically | 17 // - for 'CONTINUOUS' mode the polling function is invoked periodically |
| 18 // with the given polling period (on timer event). | 18 // with the given polling period (on timer event). |
| 19 // - for 'ONCHANGE' mode the polling function is invoked only after client | 19 // - for 'ONCHANGE' mode the polling function is invoked only after client |
| 20 // calls 'onSensorReadingChanged()' however considering the given polling peri
od: | 20 // calls 'onSensorReadingChanged()' however considering the given polling |
| 21 // guaranteed not to be called more often than expected. | 21 // period: guaranteed not to be called more often than expected. |
| 22 class SensorPollingStrategy { | 22 class SensorPollingStrategy { |
| 23 public: | 23 public: |
| 24 static std::unique_ptr<SensorPollingStrategy> create( | 24 static std::unique_ptr<SensorPollingStrategy> create( |
| 25 double pollingPeriod, | 25 double pollingPeriod, |
| 26 std::unique_ptr<Function<void()>> pollFunc, | 26 std::unique_ptr<Function<void()>> pollFunc, |
| 27 device::mojom::blink::ReportingMode); | 27 device::mojom::blink::ReportingMode); |
| 28 | 28 |
| 29 virtual void onSensorReadingChanged() {} | 29 virtual void onSensorReadingChanged() {} |
| 30 virtual void startPolling() = 0; | 30 virtual void startPolling() = 0; |
| 31 virtual void stopPolling() = 0; | 31 virtual void stopPolling() = 0; |
| 32 | 32 |
| 33 virtual ~SensorPollingStrategy(); | 33 virtual ~SensorPollingStrategy(); |
| 34 | 34 |
| 35 protected: | 35 protected: |
| 36 SensorPollingStrategy(double pollingPeriod, | 36 SensorPollingStrategy(double pollingPeriod, |
| 37 std::unique_ptr<Function<void()>>); | 37 std::unique_ptr<Function<void()>>); |
| 38 virtual void pollForData(TimerBase*) = 0; | 38 virtual void pollForData(TimerBase*) = 0; |
| 39 | 39 |
| 40 double m_pollingPeriod; | 40 double m_pollingPeriod; |
| 41 std::unique_ptr<Function<void()>> m_pollFunc; | 41 std::unique_ptr<Function<void()>> m_pollFunc; |
| 42 Timer<SensorPollingStrategy> m_timer; | 42 Timer<SensorPollingStrategy> m_timer; |
| 43 }; | 43 }; |
| 44 | 44 |
| 45 } // namespace blink | 45 } // namespace blink |
| 46 | 46 |
| 47 #endif // SensorPollingStrategy_h | 47 #endif // SensorPollingStrategy_h |
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