88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
#include "modules/cpu.hpp"
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#include <numeric>
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waybar::modules::Cpu::Cpu(const std::string& id, const Json::Value& config)
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: ALabel(config, "{usage}%", 10) {
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label_.set_name("cpu");
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if (!id.empty()) {
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label_.get_style_context()->add_class(id);
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}
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thread_ = [this] {
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dp.emit();
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thread_.sleep_for(interval_);
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};
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}
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auto waybar::modules::Cpu::update() -> void {
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// TODO: as creating dynamic fmt::arg arrays is buggy we have to calc both
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auto cpu_load = getCpuLoad();
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auto [cpu_usage, tooltip] = getCpuUsage();
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if (tooltipEnabled()) {
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label_.set_tooltip_text(tooltip);
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}
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label_.set_markup(fmt::format(format_, fmt::arg("load", cpu_load), fmt::arg("usage", cpu_usage)));
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getState(cpu_usage);
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}
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uint16_t waybar::modules::Cpu::getCpuLoad() {
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struct sysinfo info = {0};
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if (sysinfo(&info) == 0) {
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float f_load = 1.F / (1U << SI_LOAD_SHIFT);
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uint16_t load = info.loads[0] * f_load * 100 / get_nprocs();
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return load;
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}
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throw std::runtime_error("Can't get Cpu load");
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}
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std::tuple<uint16_t, std::string> waybar::modules::Cpu::getCpuUsage() {
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if (prev_times_.empty()) {
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prev_times_ = parseCpuinfo();
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std::this_thread::sleep_for(std::chrono::milliseconds(100));
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}
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std::vector<std::tuple<size_t, size_t>> curr_times = parseCpuinfo();
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std::string tooltip;
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uint16_t usage = 0;
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for (size_t i = 0; i < curr_times.size(); ++i) {
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auto [curr_idle, curr_total] = curr_times[i];
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auto [prev_idle, prev_total] = prev_times_[i];
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const float delta_idle = curr_idle - prev_idle;
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const float delta_total = curr_total - prev_total;
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uint16_t tmp = 100 * (1 - delta_idle / delta_total);
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if (i == 0) {
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usage = tmp;
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tooltip = fmt::format("Total: {}%", tmp);
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} else {
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tooltip = tooltip + fmt::format("\nCore{}: {}%", i - 1, tmp);
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}
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}
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prev_times_ = curr_times;
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return {usage, tooltip};
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}
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std::vector<std::tuple<size_t, size_t>> waybar::modules::Cpu::parseCpuinfo() {
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std::ifstream info(data_dir_);
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if (!info.is_open()) {
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throw std::runtime_error("Can't open " + data_dir_);
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}
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std::vector<std::tuple<size_t, size_t>> cpuinfo;
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std::string line;
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while (getline(info, line)) {
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if (line.substr(0, 3).compare("cpu") != 0) {
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break;
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}
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std::stringstream sline(line.substr(5));
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std::vector<size_t> times;
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for (size_t time = 0; sline >> time; times.push_back(time))
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;
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size_t idle_time = 0;
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size_t total_time = 0;
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if (times.size() >= 4) {
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idle_time = times[3];
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total_time = std::accumulate(times.begin(), times.end(), 0);
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}
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cpuinfo.emplace_back(idle_time, total_time);
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}
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return cpuinfo;
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}
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