OLD | NEW |
(Empty) | |
| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_ |
| 6 #define CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_ |
| 7 |
| 8 #include <string> |
| 9 #include <utility> |
| 10 #include <vector> |
| 11 |
| 12 #include "base/files/file_path.h" |
| 13 #include "base/macros.h" |
| 14 #include "chromeos/chromeos_export.h" |
| 15 |
| 16 namespace chromeos { |
| 17 namespace system { |
| 18 |
| 19 // Used to read CPU temperature info from sysfs hwmon. |
| 20 class CHROMEOS_EXPORT CPUTemperatureReader { |
| 21 public: |
| 22 // Contains info from a CPU temperature sensor. |
| 23 struct CPUTemperatureInfo { |
| 24 CPUTemperatureInfo(); |
| 25 ~CPUTemperatureInfo(); |
| 26 |
| 27 bool operator<(const CPUTemperatureInfo& other) const { |
| 28 return std::make_pair(label, temp_celsius) < |
| 29 std::make_pair(other.label, other.temp_celsius); |
| 30 } |
| 31 |
| 32 // The temperature read by a CPU temperature sensor in degrees Celsius. |
| 33 double temp_celsius; |
| 34 |
| 35 // The name of the CPU temperature zone monitored by this sensor. Used to |
| 36 // identify the source of each temperature reading. Taken from sysfs "name" |
| 37 // or "label" field, if it exists. |
| 38 std::string label; |
| 39 }; |
| 40 |
| 41 CPUTemperatureReader(); |
| 42 ~CPUTemperatureReader(); |
| 43 |
| 44 void set_hwmon_dir_for_test(const base::FilePath& dir) { hwmon_dir_ = dir; } |
| 45 |
| 46 // Reads temperature from each thermal sensor of the CPU. Returns a vector |
| 47 // containing a reading from each sensor. This is a blocking function that |
| 48 // should be run on a thread that allows blocking operations. |
| 49 std::vector<CPUTemperatureInfo> GetCPUTemperatures(); |
| 50 |
| 51 private: |
| 52 // Sysfs hwmon directory path. |
| 53 base::FilePath hwmon_dir_; |
| 54 |
| 55 DISALLOW_COPY_AND_ASSIGN(CPUTemperatureReader); |
| 56 }; |
| 57 |
| 58 } // namespace system |
| 59 } // namespace chromeos |
| 60 |
| 61 #endif // CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_ |
OLD | NEW |