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// 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 CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_LIGHT_EVENT_PUMP_H_
#define CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_LIGHT_EVENT_PUMP_H_
#include <memory>
#include "base/macros.h"
#include "content/common/device_sensors/device_light_data.h"
#include "content/renderer/device_sensors/device_sensor_event_pump.h"
#include "content/renderer/shared_memory_seqlock_reader.h"
namespace blink {
class WebDeviceLightListener;
}
namespace content {
typedef SharedMemorySeqLockReader<DeviceLightData>
DeviceLightSharedMemoryReader;
class CONTENT_EXPORT DeviceLightEventPump
: public DeviceSensorEventPump<blink::WebDeviceLightListener> {
public:
explicit DeviceLightEventPump(RenderThread* thread);
~DeviceLightEventPump() override;
// Sets the listener to receive updates for device light data at
// regular intervals. Returns true if the registration was successful.
bool SetListener(blink::WebDeviceLightListener* listener);
// PlatformEventObserver implementation.
bool OnControlMessageReceived(const IPC::Message& message) override;
void SendFakeDataForTesting(void* data) override;
protected:
// Methods overriden from base class DeviceSensorEventPump
void FireEvent() override;
bool InitializeReader(base::SharedMemoryHandle handle) override;
// PlatformEventObserver implementation.
void SendStartMessage() override;
void SendStopMessage() override;
private:
bool ShouldFireEvent(double data) const;
std::unique_ptr<DeviceLightSharedMemoryReader> reader_;
double last_seen_data_;
DISALLOW_COPY_AND_ASSIGN(DeviceLightEventPump);
};
} // namespace content
#endif // CONTENT_RENDERER_DEVICE_SENSORS_DEVICE_LIGHT_EVENT_PUMP_H_