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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// The Apple M1 chip has sensors to monitor its power consumption and
// temperature. This file defines a class to retrieve data from these sensors.
#ifndef COMPONENTS_POWER_METRICS_M1_SENSORS_MAC_H_
#define COMPONENTS_POWER_METRICS_M1_SENSORS_MAC_H_
#include <IOKit/hidsystem/IOHIDEventSystemClient.h>
#include <memory>
#include <optional>
#include "base/apple/scoped_cftyperef.h"
namespace power_metrics {
class M1SensorsReader {
public:
struct TemperaturesCelsius {
TemperaturesCelsius();
TemperaturesCelsius(const TemperaturesCelsius&) noexcept;
~TemperaturesCelsius();
std::optional<double> p_cores;
std::optional<double> e_cores;
};
virtual ~M1SensorsReader();
// Creates an M1SensorsReader. Returns nullptr on failure.
static std::unique_ptr<M1SensorsReader> Create();
// Reads temperature sensors. Virtual for testing.
virtual TemperaturesCelsius ReadTemperatures();
protected:
explicit M1SensorsReader(
base::apple::ScopedCFTypeRef<IOHIDEventSystemClientRef> system);
private:
base::apple::ScopedCFTypeRef<IOHIDEventSystemClientRef> system_;
};
} // namespace power_metrics
#endif // COMPONENTS_POWER_METRICS_M1_SENSORS_MAC_H_
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