mirror of https://github.com/polybar/polybar.git
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
#pragma once
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#include "components/builder.hpp"
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#include "modules/meta/base.hpp"
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POLYBAR_NS
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namespace modules {
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template <class Impl>
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class inotify_module : public module<Impl> {
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public:
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using module<Impl>::module;
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void start() override {
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this->module<Impl>::start();
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this->m_mainthread = thread(&inotify_module::runner, this);
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}
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protected:
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void runner() {
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this->m_log.trace("%s: Thread id = %i", this->name(), concurrency_util::thread_id(this_thread::get_id()));
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try {
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// Warm up module output before entering the loop
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std::unique_lock<std::mutex> guard(this->m_updatelock);
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CAST_MOD(Impl)->on_event({});
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CAST_MOD(Impl)->broadcast();
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guard.unlock();
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while (this->running()) {
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std::lock_guard<std::mutex> guard(this->m_updatelock);
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CAST_MOD(Impl)->poll_events();
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}
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} catch (const module_error& err) {
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CAST_MOD(Impl)->halt(err.what());
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} catch (const std::exception& err) {
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CAST_MOD(Impl)->halt(err.what());
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}
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}
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void watch(string path, int mask = IN_ALL_EVENTS) {
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this->m_log.trace("%s: Attach inotify at %s", this->name(), path);
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m_watchlist.insert(make_pair(path, mask));
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}
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void idle() {
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this->sleep(200ms);
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}
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void poll_events() {
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vector<inotify_watch> watches;
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try {
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for (auto&& w : m_watchlist) {
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watches.emplace_back(w.first);
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watches.back().attach(w.second);
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}
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} catch (const system_error& e) {
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this->m_log.err("%s: Error while creating inotify watch (what: %s)", this->name(), e.what());
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CAST_MOD(Impl)->sleep(0.1s);
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return;
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}
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while (this->running()) {
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for (auto&& w : watches) {
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this->m_log.trace_x("%s: Poll inotify watch %s", this->name(), w.path());
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if (w.poll(1000 / watches.size())) {
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auto event = w.get_event();
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if (CAST_MOD(Impl)->on_event(event)) {
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CAST_MOD(Impl)->broadcast();
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}
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CAST_MOD(Impl)->idle();
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return;
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}
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if (!this->running()) {
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break;
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}
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}
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CAST_MOD(Impl)->idle();
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}
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}
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private:
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map<string, int> m_watchlist;
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};
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} // namespace modules
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POLYBAR_NS_END
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