Robin E.R. Davies
119 lines
3.3 KiB
C++
119 lines
3.3 KiB
C++
// Copyright (c) Robin E.R. Davies
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "CpuTemperatureMonitor.hpp"
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#include <iostream>
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#include <filesystem>
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#include <fstream>
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#include <string>
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#include <string_view>
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#include <optional>
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#include <system_error>
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namespace fs = std::filesystem;
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using namespace pipedal;
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static constexpr std::string_view THERMAL_PATH = "/sys/class/thermal/";
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static std::optional<std::string> readFile(const fs::path& path) {
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std::ifstream file(path);
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if (!file) {
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return std::nullopt;
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}
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std::string content;
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std::getline(file, content);
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return content;
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}
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static bool isCpuThermal(const fs::path &zone_path) {
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auto type = readFile(zone_path / "type");
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return type && (*type == "cpu-thermal") || (*type == "x86_pkg_temp");
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}
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class CpuTemperatureMonitorImpl: public CpuTemperatureMonitor {
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private:
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std::vector<fs::path> cpuZones;
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public:
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explicit CpuTemperatureMonitorImpl(std::vector<fs::path>&&cpuZones)
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: cpuZones(std::move(cpuZones)) {
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}
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virtual float GetTemperatureC() override {
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float result = INVALID_TEMPERATURE*1000;
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for (const auto&cpuZone: cpuZones)
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{
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std::ifstream file(cpuZone / "temp");
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if (file) {
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float v;
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file >> v;
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if (file)
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{
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if (v > result)
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{
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result = v;
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}
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}
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}
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}
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return result/1000;
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}
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};
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static std::vector<fs::path> findCpuThermalZones() {
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std::vector<fs::path> cpu_zones;
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std::error_code ec;
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for (const auto& entry : fs::directory_iterator(THERMAL_PATH, ec)) {
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if (ec) {
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std::cerr << "Error reading directory: " << ec.message() << '\n';
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continue;
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}
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const auto& path = entry.path();
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if (path.filename().string().find("thermal_zone") == 0) {
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if (isCpuThermal(path)) {
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cpu_zones.push_back(path);
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}
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}
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}
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return cpu_zones;
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}
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CpuTemperatureMonitor::ptr CpuTemperatureMonitor::Get()
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{
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std::vector<fs::path> cpuZones = findCpuThermalZones();
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return std::make_unique<CpuTemperatureMonitorImpl>(std::move(cpuZones));
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}
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