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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/macros.h" | |
13 | |
14 namespace chromeos { | |
15 namespace system { | |
16 | |
17 // Used to read CPU temperature info from sysfs hwmon. | |
18 class CPUTemperatureReader { | |
19 public: | |
20 // Contains info from a CPU temperature sensor. | |
21 struct CPUTemperatureInfo { | |
22 CPUTemperatureInfo(); | |
23 ~CPUTemperatureInfo(); | |
24 | |
25 bool operator<(const CPUTemperatureInfo& other) const { | |
26 return std::make_pair(label, temp_celsius) < | |
27 std::make_pair(other.label, other.temp_celsius); | |
28 } | |
29 | |
30 // The temperature read by a CPU temperature sensor in degrees Celsius. | |
31 double temp_celsius; | |
32 | |
33 // The name of the CPU temperature zone monitored by this sensor. Used to | |
34 // identify the source of each temperature reading. Taken from sysfs "name" | |
35 // or "label" field, if it exists. | |
36 std::string label; | |
37 }; | |
38 | |
39 CPUTemperatureReader(); | |
40 ~CPUTemperatureReader(); | |
41 | |
42 void set_hwmon_dir_for_test(const std::string& dir) { hwmon_dir_ = dir; } | |
43 | |
44 // Reads temperature from each thermal sensor of the CPU. Returns a vector | |
45 // containing a reading from each sensor. This is a blocking function that | |
46 // should be run on a thread that allows blocking operations. | |
47 std::vector<CPUTemperatureInfo> GetCPUTemperatures(); | |
48 | |
49 private: | |
50 // Sysfs hwmon directory path. | |
51 std::string hwmon_dir_; | |
Daniel Erat
2017/04/24 20:16:50
make this be a base::FilePath instead
Simon Que
2017/04/24 22:25:48
Done.
| |
52 | |
53 DISALLOW_COPY_AND_ASSIGN(CPUTemperatureReader); | |
54 }; | |
55 | |
56 } // namespace system | |
57 } // namespace chromeos | |
58 | |
59 #endif // CHROMEOS_SYSTEM_CPU_TEMPERATURE_READER_H_ | |
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