66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
#include "modules/memory.hpp"
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waybar::modules::Memory::Memory(const std::string& id, const Json::Value& config)
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: ALabel(config, "memory", id, "{}%", 30) {
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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::Memory::update() -> void {
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parseMeminfo();
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unsigned long memtotal = meminfo_["MemTotal"];
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unsigned long memfree;
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if (meminfo_.count("MemAvailable")) {
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// New kernels (3.4+) have an accurate available memory field.
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memfree = meminfo_["MemAvailable"];
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} else {
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// Old kernel; give a best-effort approximation of available memory.
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memfree = meminfo_["MemFree"] + meminfo_["Buffers"] + meminfo_["Cached"] +
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meminfo_["SReclaimable"] - meminfo_["Shmem"];
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}
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if (memtotal > 0 && memfree >= 0) {
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auto total_ram_gigabytes = memtotal / std::pow(1024, 2);
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int used_ram_percentage = 100 * (memtotal - memfree) / memtotal;
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auto used_ram_gigabytes = (memtotal - memfree) / std::pow(1024, 2);
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auto available_ram_gigabytes = memfree / std::pow(1024, 2);
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getState(used_ram_percentage);
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label_.set_markup(fmt::format(format_,
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used_ram_percentage,
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fmt::arg("total", total_ram_gigabytes),
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fmt::arg("percentage", used_ram_percentage),
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fmt::arg("used", used_ram_gigabytes),
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fmt::arg("avail", available_ram_gigabytes)));
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if (tooltipEnabled()) {
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label_.set_tooltip_text(fmt::format("{:.{}f}Gb used", used_ram_gigabytes, 1));
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}
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event_box_.show();
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} else {
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event_box_.hide();
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}
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// Call parent update
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ALabel::update();
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}
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void waybar::modules::Memory::parseMeminfo() {
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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::string line;
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while (getline(info, line)) {
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auto posDelim = line.find(':');
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if (posDelim == std::string::npos) {
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continue;
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}
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std::string name = line.substr(0, posDelim);
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int64_t value = std::stol(line.substr(posDelim + 1));
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meminfo_[name] = value;
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}
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}
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