waybar/src/modules/cpu.cpp

#include "modules/cpu.hpp"

waybar::modules::Cpu::Cpu(Json::Value config)
  : config_(std::move(config))
{
  label_.set_name("cpu");
  uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 10;
  thread_ = [this, interval] {
    Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Cpu::update));
    thread_.sleep_for(chrono::seconds(interval));
  };
};

auto waybar::modules::Cpu::update() -> void
{
  struct sysinfo info = {};
  if (sysinfo(&info) == 0) {
    float f_load = 1.f / (1U << SI_LOAD_SHIFT);
    uint16_t load = info.loads[0] * f_load * 100 / get_nprocs();
    auto format = config_["format"] ? config_["format"].asString() : "{}%";
    label_.set_text(fmt::format(format, load));
  }
}

waybar::modules::Cpu::operator Gtk::Widget &() {
  return label_;
}