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// 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_PLATFORM_SENSOR_AMBIENT_LIGHT_SENSOR_MAC_H_
#define DEVICE_GENERIC_PLATFORM_SENSOR_AMBIENT_LIGHT_SENSOR_MAC_H_
#include <IOKit/IOKitLib.h>
#include "base/mac/scoped_ionotificationportref.h"
#include "base/mac/scoped_ioobject.h"
#include "services/device/generic_sensor/platform_sensor.h"
namespace device {
// Implementation of PlatformSensor for macOS to query the ambient light sensor.
// This is a single instance object per browser process which is created by
// The singleton PlatformSensorProviderMac. If there are no clients, this
// instance is not created.
class PlatformSensorAmbientLightMac : public PlatformSensor {
public:
// Construct a platform sensor of AMBIENT_LIGHT, given a buffer |mapping|
// to write the result back.
PlatformSensorAmbientLightMac(mojo::ScopedSharedBufferMapping mapping,
PlatformSensorProvider* provider);
mojom::ReportingMode GetReportingMode() override;
// Can only be called once, the first time or after a StopSensor call.
bool StartSensor(const PlatformSensorConfiguration& configuration) override;
void StopSensor() override;
protected:
~PlatformSensorAmbientLightMac() override;
bool CheckSensorConfiguration(
const PlatformSensorConfiguration& configuration) override;
PlatformSensorConfiguration GetDefaultConfiguration() override;
private:
bool ReadAndUpdate();
static void IOServiceCallback(void* context,
io_service_t service,
natural_t message_type,
void* message_argument);
// IOService representing the LMU sensor.
base::mac::ScopedIOObject<io_service_t> light_sensor_service_;
// Port used to get the notifications from the sensor.
base::mac::ScopedIONotificationPortRef light_sensor_port_;
// IO Object used to query the value of the sensor.
base::mac::ScopedIOObject<io_object_t> light_sensor_object_;
// IO Notifications created by IOServiceAddInterestNotification.
base::mac::ScopedIOObject<io_object_t> light_sensor_notification_;
// IO Notifications created by IOServiceAddInterestNotification when the
// sensor is busy.
base::mac::ScopedIOObject<io_object_t> light_sensor_busy_notification_;
double current_lux_;
DISALLOW_COPY_AND_ASSIGN(PlatformSensorAmbientLightMac);
};
} // namespace device
#endif // DEVICE_GENERIC_PLATFORM_SENSOR_AMBIENT_LIGHT_SENSOR_MAC_H_