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Unified Diff: device/sensor/sensor_service.h

Issue 1892083002: Generic Sensor API : Ambient Light Sensor API. Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 8 months ago
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Index: device/sensor/sensor_service.h
diff --git a/device/sensor/sensor_service.h b/device/sensor/sensor_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..61e46b0fde0508ff3712b5b574a31c2fcc6d5715
--- /dev/null
+++ b/device/sensor/sensor_service.h
@@ -0,0 +1,64 @@
+// 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_SENSOR_SENSOR_SERVICE_H_
+#define DEVICE_SENSOR_SENSOR_SERVICE_H_
+
+#include "base/callback_list.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/singleton.h"
+
+#include "device/sensor/als_reading.mojom.h"
+#include "device/sensor/sensor_export.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace device {
+class SensorManager;
+
+class DEVICE_SENSOR_EXPORT SensorService {
+ public:
+ typedef base::Callback<void(const AmbientLightSensorReading&)>
+ SensorUpdateCallback;
+ typedef base::CallbackList<void(const AmbientLightSensorReading&)>
+ SensorUpdateCallbackList;
+ typedef SensorUpdateCallbackList::Subscription SensorUpdateSubscription;
+
+ // Returns the SensorService singleton.
+ static SensorService* GetInstance();
+
+ scoped_ptr<SensorUpdateSubscription> AddCallback(
+ const SensorUpdateCallback& callback);
+
+ void Shutdown();
+
+ private:
+ friend struct base::DefaultSingletonTraits<SensorService>;
+
+ SensorService();
+ virtual ~SensorService();
+
+ // Updates current als_reading and sends new reading to interested
+ // render processes. Can be called on any thread via a callback.
+ void NotifyConsumers(const AmbientLightSensorReading& reading);
+ void NotifyConsumersOnMainThread(const AmbientLightSensorReading& reading);
+ void ConsumersChanged();
+
+ scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
+ scoped_ptr<SensorManager> sensor_fetcher_;
+ SensorUpdateCallbackList callback_list_;
+ SensorUpdateCallback update_callback_;
+ AmbientLightSensorReading reading_;
+ bool reading_updated_;
+ bool is_shutdown_;
+
+ DISALLOW_COPY_AND_ASSIGN(SensorService);
+};
+
+} // namespace device
+
+#endif // DEVICE_SENSOR_SENSOR_SERVICE_H_

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