Waybar/src/modules/memory.cpp

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#include "modules/memory.hpp"
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waybar::modules::Memory::Memory(const std::string& id, const Json::Value& config)
: 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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auto waybar::modules::Memory::update() -> void {
// Run user-provided update handler if configured
if (config_["on-update"].isString()) {
AModule::update();
}
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parseMeminfo();
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if (memtotal_ > 0 && memfree_ >= 0) {
auto total_ram_gigabytes = memtotal_ / std::pow(1024, 2);
int used_ram_percentage = 100 * (memtotal_ - memfree_) / memtotal_;
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auto used_ram_gigabytes = (memtotal_ - memfree_) / std::pow(1024, 2);
auto available_ram_gigabytes = memfree_ / std::pow(1024, 2);
getState(used_ram_percentage);
label_.set_markup(fmt::format(format_,
used_ram_percentage,
fmt::arg("total", total_ram_gigabytes),
fmt::arg("percentage", used_ram_percentage),
fmt::arg("used", used_ram_gigabytes),
fmt::arg("avail", available_ram_gigabytes)));
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if (tooltipEnabled()) {
label_.set_tooltip_text(fmt::format("{:.{}f}Gb used", used_ram_gigabytes, 1));
}
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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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}
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void waybar::modules::Memory::parseMeminfo() {
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int64_t memfree = -1, membuffer = -1, memcache = -1, memavail = -1;
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std::ifstream info(data_dir_);
if (!info.is_open()) {
throw std::runtime_error("Can't open " + data_dir_);
}
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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) {
continue;
}
std::string name = line.substr(0, posDelim);
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int64_t value = std::stol(line.substr(posDelim + 1));
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if (name.compare("MemTotal") == 0) {
memtotal_ = value;
} else if (name.compare("MemAvailable") == 0) {
memavail = value;
} else if (name.compare("MemFree") == 0) {
memfree = value;
} else if (name.compare("Buffers") == 0) {
membuffer = value;
} else if (name.compare("Cached") == 0) {
memcache = value;
}
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if (memtotal_ > 0 && (memavail >= 0 || (memfree > -1 && membuffer > -1 && memcache > -1))) {
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break;
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}
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}
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memfree_ = memavail >= 0 ? memavail : memfree + membuffer + memcache;
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}