Waybar/src/modules/cpu_usage/linux.cpp

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2022-12-21 16:47:06 +00:00
#include <filesystem>
#include "modules/cpu_usage.hpp"
std::vector<std::tuple<size_t, size_t>> waybar::modules::CpuUsage::parseCpuinfo() {
const std::string data_dir_ = "/proc/stat";
std::ifstream info(data_dir_);
if (!info.is_open()) {
throw std::runtime_error("Can't open " + data_dir_);
}
std::vector<std::tuple<size_t, size_t>> cpuinfo;
std::string line;
while (getline(info, line)) {
if (line.substr(0, 3).compare("cpu") != 0) {
break;
}
std::stringstream sline(line.substr(5));
std::vector<size_t> times;
for (size_t time = 0; sline >> time; times.push_back(time))
;
size_t idle_time = 0;
size_t total_time = 0;
if (times.size() >= 4) {
idle_time = times[3];
total_time = std::accumulate(times.begin(), times.end(), 0);
}
cpuinfo.emplace_back(idle_time, total_time);
}
return cpuinfo;
}