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- // Copyright 2017 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 CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_
- #define CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_
- #include <string>
- #include <utility>
- #include <vector>
- #include "base/component_export.h"
- #include "base/files/file_path.h"
- namespace chromeos {
- namespace system {
- // Used to read CPU temperature info from sysfs hwmon.
- class COMPONENT_EXPORT(CHROMEOS_SYSTEM) CPUTemperatureReader {
- public:
- // Contains info from a CPU temperature sensor.
- struct CPUTemperatureInfo {
- CPUTemperatureInfo();
- ~CPUTemperatureInfo();
- bool operator<(const CPUTemperatureInfo& other) const {
- return std::make_pair(label, temp_celsius) <
- std::make_pair(other.label, other.temp_celsius);
- }
- // The temperature read by a CPU temperature sensor in degrees Celsius.
- double temp_celsius;
- // The name of the CPU temperature zone monitored by this sensor. Used to
- // identify the source of each temperature reading. Taken from sysfs "name"
- // or "label" field, if it exists.
- std::string label;
- };
- CPUTemperatureReader();
- CPUTemperatureReader(const CPUTemperatureReader&) = delete;
- CPUTemperatureReader& operator=(const CPUTemperatureReader&) = delete;
- ~CPUTemperatureReader();
- void set_hwmon_dir_for_test(const base::FilePath& dir) { hwmon_dir_ = dir; }
- // Reads temperature from each thermal sensor of the CPU. Returns a vector
- // containing a reading from each sensor. This is a blocking function that
- // should be run on a thread that allows blocking operations.
- std::vector<CPUTemperatureInfo> GetCPUTemperatures();
- private:
- // Sysfs hwmon directory path.
- base::FilePath hwmon_dir_;
- };
- } // namespace system
- } // namespace chromeos
- #endif // CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_
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