blob: d32672525f8f7d6ea06069d8f459de0efd6546f6 [file] [log] [blame]
// 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.
#include <string>
#include <utility>
#include <vector>
#include "base/files/file_path.h"
#include "base/macros.h"
#include "chromeos/chromeos_export.h"
namespace chromeos {
namespace system {
// Used to read CPU temperature info from sysfs hwmon.
class CHROMEOS_EXPORT CPUTemperatureReader {
// Contains info from a CPU temperature sensor.
struct 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;
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();
// Sysfs hwmon directory path.
base::FilePath hwmon_dir_;
} // namespace system
} // namespace chromeos