refactor: proper modules destruction

include/bar.hpp

@@ -18,6 +18,7 @@ class Bar {
   public:
     Bar(const Client&, std::unique_ptr<struct wl_output *>&&, uint32_t);
     Bar(const Bar&) = delete;
+    ~Bar() = default;
 
     auto toggle() -> void;
 
@@ -54,6 +55,10 @@ class Bar {
     Glib::RefPtr<Gtk::StyleContext> style_context_;
     Glib::RefPtr<Gtk::CssProvider> css_provider_;
     struct zxdg_output_v1 *xdg_output_;
+    Gtk::Box left_;
+    Gtk::Box center_;
+    Gtk::Box right_;
+    Gtk::Box box_;
     std::vector<std::unique_ptr<waybar::IModule>> modules_left_;
     std::vector<std::unique_ptr<waybar::IModule>> modules_center_;
     std::vector<std::unique_ptr<waybar::IModule>> modules_right_;

include/modules/battery.hpp

@@ -10,7 +10,7 @@
 #include <fmt/format.h>
 #include <sys/inotify.h>
 #include <algorithm>
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "ALabel.hpp"
 
 namespace waybar::modules {

include/modules/clock.hpp

@@ -2,7 +2,7 @@
 
 #include <fmt/format.h>
 #include "fmt/time.h"
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "ALabel.hpp"
 
 namespace waybar::modules {
@@ -10,6 +10,7 @@ namespace waybar::modules {
 class Clock : public ALabel {
   public:
     Clock(const std::string&, const Json::Value&);
+    ~Clock() = default;
     auto update() -> void;
   private:
     waybar::util::SleeperThread thread_;

include/modules/cpu.hpp

@@ -6,7 +6,7 @@
 #include <vector>
 #include <numeric>
 #include <iostream>
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "ALabel.hpp"
 
 namespace waybar::modules {
@@ -14,6 +14,7 @@ namespace waybar::modules {
 class Cpu : public ALabel {
   public:
     Cpu(const std::string&, const Json::Value&);
+    ~Cpu() = default;
     auto update() -> void;
   private:
     static inline const std::string data_dir_ = "/proc/stat";

include/modules/custom.hpp

@@ -2,7 +2,7 @@
 
 #include <fmt/format.h>
 #include <iostream>
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "util/command.hpp"
 #include "util/json.hpp"
 #include "ALabel.hpp"

include/modules/memory.hpp

@@ -2,7 +2,7 @@
 
 #include <fmt/format.h>
 #include <fstream>
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "ALabel.hpp"
 
 namespace waybar::modules {
@@ -10,6 +10,7 @@ namespace waybar::modules {
 class Memory : public ALabel {
   public:
     Memory(const std::string&, const Json::Value&);
+    ~Memory() = default;
     auto update() -> void;
   private:
     static inline const std::string data_dir_ = "/proc/meminfo";

include/modules/network.hpp

@@ -7,8 +7,9 @@
 #include <netlink/genl/genl.h>
 #include <netlink/genl/ctrl.h>
 #include <linux/nl80211.h>
+#include <sys/epoll.h>
 #include <fmt/format.h>
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "ALabel.hpp"
 
 namespace waybar::modules {
@@ -19,15 +20,17 @@ class Network : public ALabel {
     ~Network();
     auto update() -> void;
   private:
-    static int netlinkRequest(int, void*, uint32_t, uint32_t groups = 0);
+    static int handleEvents(struct nl_msg*, void*);
-    static int netlinkResponse(int, void*, uint32_t, uint32_t groups = 0);
+    static int handleScan(struct nl_msg*, void*);
-    static int scanCb(struct nl_msg*, void*);
 
     void worker();
     void disconnected();
-    void initNL80211();
+    void createInfoSocket();
+    void createEventSocket();
     int getExternalInterface();
     void getInterfaceAddress();
+    int netlinkRequest(void*, uint32_t, uint32_t groups = 0);
+    int netlinkResponse(void*, uint32_t, uint32_t groups = 0);
     void parseEssid(struct nlattr**);
     void parseSignal(struct nlattr**);
     bool associatedOrJoined(struct nlattr**);
@@ -37,9 +40,11 @@ class Network : public ALabel {
     waybar::util::SleeperThread thread_timer_;
     int ifid_;
     sa_family_t family_;
-    int sock_fd_;
     struct sockaddr_nl nladdr_ = {0};
     struct nl_sock* sk_ = nullptr;
+    struct nl_sock* info_sock_ = nullptr;
+    int efd_;
+    int ev_fd_;
     int nl80211_id_;
 
     std::string essid_;

include/modules/sni/tray.hpp

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <fmt/format.h>
-#include <thread>
 #include "bar.hpp"
 #include "util/json.hpp"
 #include "IModule.hpp"
@@ -13,6 +12,7 @@ namespace waybar::modules::SNI {
 class Tray : public IModule {
   public:
     Tray(const std::string&, const Json::Value&);
+    ~Tray() = default;
     auto update() -> void;
     operator Gtk::Widget &();
   private:
@@ -20,7 +20,6 @@ class Tray : public IModule {
     void onRemove(std::unique_ptr<Item>& item);
 
     static inline std::size_t nb_hosts_ = 0;
-    std::thread thread_;
     const Json::Value& config_;
     Gtk::Box box_;
     SNI::Watcher watcher_ ;

include/modules/sway/ipc/client.hpp

@@ -10,33 +10,31 @@
 namespace waybar::modules::sway {
 
 class Ipc {
-  public:
+public:
-    Ipc();
+  Ipc();
-    ~Ipc();
+  ~Ipc();
 
-		struct ipc_response {
+  struct ipc_response {
-			uint32_t size;
+    uint32_t size;
-			uint32_t type;
+    uint32_t type;
-			std::string payload;
+    std::string payload;
-		};
+  };
 
-		void connect();
+  struct ipc_response sendCmd(uint32_t type, const std::string &payload = "") const;
-		struct ipc_response sendCmd(uint32_t type,
+  void subscribe(const std::string &payload) const;
-			const std::string& payload = "") const;
+  struct ipc_response handleEvent() const;
-		void subscribe(const std::string& payload) const;
-		struct ipc_response handleEvent() const;
-  protected:
-		static inline const std::string ipc_magic_ = "i3-ipc";
-		static inline const size_t ipc_header_size_ = ipc_magic_.size() + 8;
 
-		const std::string getSocketPath() const;
+protected:
-		int open(const std::string&) const;
+  static inline const std::string ipc_magic_ = "i3-ipc";
-		struct ipc_response send(int fd, uint32_t type,
+  static inline const size_t ipc_header_size_ = ipc_magic_.size() + 8;
-			const std::string& payload = "") const;
-		struct ipc_response recv(int fd) const;
 
-		int fd_;
+  const std::string getSocketPath() const;
-		int fd_event_;
+  int open(const std::string &) const;
+  struct ipc_response send(int fd, uint32_t type, const std::string &payload = "") const;
+  struct ipc_response recv(int fd) const;
+
+  int fd_;
+  int fd_event_;
 };
 
-}
+} // namespace waybar::modules::sway

include/modules/sway/ipc/ipc.hpp

@@ -3,30 +3,30 @@
 #define event_mask(ev) (1u << (ev & 0x7F))
 
 enum ipc_command_type {
-	// i3 command types - see i3's I3_REPLY_TYPE constants
+  // i3 command types - see i3's I3_REPLY_TYPE constants
-	IPC_COMMAND = 0,
+  IPC_COMMAND = 0,
-	IPC_GET_WORKSPACES = 1,
+  IPC_GET_WORKSPACES = 1,
-	IPC_SUBSCRIBE = 2,
+  IPC_SUBSCRIBE = 2,
-	IPC_GET_OUTPUTS = 3,
+  IPC_GET_OUTPUTS = 3,
-	IPC_GET_TREE = 4,
+  IPC_GET_TREE = 4,
-	IPC_GET_MARKS = 5,
+  IPC_GET_MARKS = 5,
-	IPC_GET_BAR_CONFIG = 6,
+  IPC_GET_BAR_CONFIG = 6,
-	IPC_GET_VERSION = 7,
+  IPC_GET_VERSION = 7,
-	IPC_GET_BINDING_MODES = 8,
+  IPC_GET_BINDING_MODES = 8,
-	IPC_GET_CONFIG = 9,
+  IPC_GET_CONFIG = 9,
-	IPC_SEND_TICK = 10,
+  IPC_SEND_TICK = 10,
 
-	// sway-specific command types
+  // sway-specific command types
-	IPC_GET_INPUTS = 100,
+  IPC_GET_INPUTS = 100,
-	IPC_GET_SEATS = 101,
+  IPC_GET_SEATS = 101,
 
-	// Events sent from sway to clients. Events have the highest bits set.
+  // Events sent from sway to clients. Events have the highest bits set.
-	IPC_EVENT_WORKSPACE = ((1<<31) | 0),
+  IPC_EVENT_WORKSPACE = ((1 << 31) | 0),
-	IPC_EVENT_OUTPUT = ((1<<31) | 1),
+  IPC_EVENT_OUTPUT = ((1 << 31) | 1),
-	IPC_EVENT_MODE = ((1<<31) | 2),
+  IPC_EVENT_MODE = ((1 << 31) | 2),
-	IPC_EVENT_WINDOW = ((1<<31) | 3),
+  IPC_EVENT_WINDOW = ((1 << 31) | 3),
-	IPC_EVENT_BARCONFIG_UPDATE = ((1<<31) | 4),
+  IPC_EVENT_BARCONFIG_UPDATE = ((1 << 31) | 4),
-	IPC_EVENT_BINDING = ((1<<31) | 5),
+  IPC_EVENT_BINDING = ((1 << 31) | 5),
-	IPC_EVENT_SHUTDOWN = ((1<<31) | 6),
+  IPC_EVENT_SHUTDOWN = ((1 << 31) | 6),
-	IPC_EVENT_TICK = ((1<<31) | 7),
+  IPC_EVENT_TICK = ((1 << 31) | 7),
 };

include/modules/sway/mode.hpp

@@ -3,7 +3,7 @@
 #include <fmt/format.h>
 #include "bar.hpp"
 #include "client.hpp"
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "util/json.hpp"
 #include "ALabel.hpp"
 #include "modules/sway/ipc/client.hpp"
@@ -13,6 +13,7 @@ namespace waybar::modules::sway {
 class Mode : public ALabel {
   public:
     Mode(const std::string&, const waybar::Bar&, const Json::Value&);
+    ~Mode() = default;
     auto update() -> void;
   private:
     void worker();

include/modules/sway/window.hpp

@@ -4,7 +4,7 @@
 #include <tuple>
 #include "bar.hpp"
 #include "client.hpp"
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "util/json.hpp"
 #include "ALabel.hpp"
 #include "modules/sway/ipc/client.hpp"
@@ -14,6 +14,7 @@ namespace waybar::modules::sway {
 class Window : public ALabel {
   public:
     Window(const std::string&, const waybar::Bar&, const Json::Value&);
+    ~Window() = default;
     auto update() -> void;
   private:
     void worker();

include/modules/sway/workspaces.hpp

@@ -3,7 +3,7 @@
 #include <fmt/format.h>
 #include "bar.hpp"
 #include "client.hpp"
-#include "util/chrono.hpp"
+#include "util/sleeper_thread.hpp"
 #include "util/json.hpp"
 #include "IModule.hpp"
 #include "modules/sway/ipc/client.hpp"
@@ -14,6 +14,7 @@ namespace waybar::modules::sway {
 class Workspaces : public IModule {
   public:
     Workspaces(const std::string&, const waybar::Bar&, const Json::Value&);
+    ~Workspaces() = default;
     auto update() -> void;
     operator Gtk::Widget &();
   private:
@@ -27,14 +28,14 @@ class Workspaces : public IModule {
 
     const Bar& bar_;
     const Json::Value& config_;
+    Json::Value workspaces_;
     waybar::util::SleeperThread thread_;
     Gtk::Box box_;
     util::JsonParser parser_;
+    Ipc ipc_;
     std::mutex mutex_;
     bool scrolling_;
     std::unordered_map<std::string, Gtk::Button> buttons_;
-    Json::Value workspaces_;
-    Ipc ipc_;
 };
 
 }

include/util/command.hpp

@@ -2,6 +2,7 @@
 
 #include <sys/wait.h>
 #include <giomm.h>
+#include <unistd.h>
 
 namespace waybar::util::command {
 

include/util/json.hpp

@@ -10,7 +10,7 @@ struct JsonParser {
     : reader_(builder_.newCharReader())
   {}
 
-  const Json::Value parse(const std::string data) const
+  const Json::Value parse(const std::string& data) const
   {
     Json::Value root;
     std::string err;

include/util/sleeper_thread.hpp

@@ -6,30 +6,20 @@
 #include <condition_variable>
 #include <thread>
 
-namespace waybar::chrono {
-
-using namespace std::chrono;
-
-using clock = std::chrono::system_clock;
-using duration = clock::duration;
-using time_point = std::chrono::time_point<clock, duration>;
-
-}
-
 namespace waybar::util {
 
-struct SleeperThread {
+class SleeperThread {
+public:
   SleeperThread() = default;
 
   SleeperThread(std::function<void()> func)
-    : do_run_(true), thread_{[this, func] {
+    : thread_{[this, func] {
         while (do_run_) func();
       }}
   {}
 
   SleeperThread& operator=(std::function<void()> func)
   {
-    do_run_ = true;
     thread_ = std::thread([this, func] {
       while (do_run_) func();
     });
@@ -41,16 +31,17 @@ struct SleeperThread {
     return do_run_;
   }
 
-  auto sleep_for(chrono::duration dur)
+  auto sleep_for(std::chrono::system_clock::duration dur)
   {
-    auto lock = std::unique_lock(mutex_);
+    std::unique_lock lk(mutex_);
-    return condvar_.wait_for(lock, dur);
+    return condvar_.wait_for(lk, dur, [this] { return !do_run_; });
   }
 
-  auto sleep_until(chrono::time_point time)
+  auto sleep_until(std::chrono::time_point<std::chrono::system_clock,
+    std::chrono::system_clock::duration> time_point)
   {
-    auto lock = std::unique_lock(mutex_);
+    std::unique_lock lk(mutex_);
-    return condvar_.wait_until(lock, time);
+    return condvar_.wait_until(lk, time_point, [this] { return !do_run_; });
   }
 
   auto wake_up()
@@ -60,7 +51,10 @@ struct SleeperThread {
 
   auto stop()
   {
-    do_run_ = false;
+    {
+      std::lock_guard<std::mutex> lck(mutex_);
+      do_run_ = false;
+    }
     condvar_.notify_all();
   }
 
@@ -68,15 +62,15 @@ struct SleeperThread {
   {
     stop();
     if (thread_.joinable()) {
-      thread_.detach();
+      thread_.join();
     }
   }
 
 private:
-  bool do_run_ = false;
   std::thread thread_;
   std::condition_variable condvar_;
   std::mutex mutex_;
+  bool do_run_ = true;
 };
 
 }

meson.build

@@ -9,7 +9,7 @@ project(
     ],
 )
 
-cpp_args = ['-DVERSION="@0@"'.format(meson.project_version())]
+cpp_args = []
 cpp_link_args = []
 
 if false # libc++
@@ -22,6 +22,16 @@ else
 endif
 
 compiler = meson.get_compiler('cpp')
+git = find_program('git', required: false)
+
+if not git.found()
+    add_project_arguments('-DVERSION="@0@"'.format(meson.project_version()), language: 'cpp')
+else
+    git_commit_hash = run_command([git.path(), 'describe', '--always', '--tags']).stdout().strip()
+    git_branch = run_command([git.path(), 'rev-parse', '--abbrev-ref', 'HEAD']).stdout().strip()
+    version = '"@0@ (" __DATE__ ", branch \'@1@\')"'.format(git_commit_hash, git_branch)
+    add_project_arguments('-DVERSION=@0@'.format(version), language: 'cpp')
+endif
 
 if not compiler.has_header('filesystem')
     add_project_arguments('-DFILESYSTEM_EXPERIMENTAL', language: 'cpp')

src/bar.cpp

@@ -7,7 +7,9 @@ waybar::Bar::Bar(const Client& client,
   std::unique_ptr<struct wl_output *> &&p_output, uint32_t p_wl_name)
   : client(client), window{Gtk::WindowType::WINDOW_TOPLEVEL},
     surface(nullptr), layer_surface(nullptr),
-    output(std::move(p_output)), wl_name(p_wl_name)
+    output(std::move(p_output)), wl_name(p_wl_name),
+    left_(Gtk::ORIENTATION_HORIZONTAL, 0), center_(Gtk::ORIENTATION_HORIZONTAL, 0),
+    right_(Gtk::ORIENTATION_HORIZONTAL, 0), box_(Gtk::ORIENTATION_HORIZONTAL, 0)
 {
   static const struct zxdg_output_v1_listener xdgOutputListener = {
     .logical_position = handleLogicalPosition,
@@ -200,28 +202,23 @@ void waybar::Bar::getModules(const Factory& factory, const std::string& pos)
 
 auto waybar::Bar::setupWidgets() -> void
 {
-  auto &left = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
+  window.add(box_);
-  auto &center = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
+  box_.pack_start(left_, true, true);
-  auto &right = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
+  box_.set_center_widget(center_);
-
+  box_.pack_end(right_, true, true);
-  auto &box = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
-  window.add(box);
-  box.pack_start(left, true, true);
-  box.set_center_widget(center);
-  box.pack_end(right, true, true);
 
   Factory factory(*this, config_);
   getModules(factory, "modules-left");
   getModules(factory, "modules-center");
   getModules(factory, "modules-right");
   for (auto const& module : modules_left_) {
-    left.pack_start(*module, false, true, 0);
+    left_.pack_start(*module, false, true, 0);
   }
   for (auto const& module : modules_center_) {
-    center.pack_start(*module, true, true, 0);
+    center_.pack_start(*module, true, true, 0);
   }
   std::reverse(modules_right_.begin(), modules_right_.end());
   for (auto const& module : modules_right_) {
-    right.pack_end(*module, false, false, 0);
+    right_.pack_end(*module, false, false, 0);
   }
 }

src/modules/clock.cpp

@@ -8,7 +8,7 @@ waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
     label_.get_style_context()->add_class(id);
   }
   thread_ = [this] {
-    auto now = waybar::chrono::clock::now();
+    auto now = std::chrono::system_clock::now();
     dp.emit();
     auto timeout = std::chrono::floor<std::chrono::seconds>(now + interval_);
     auto time_s = std::chrono::time_point_cast<std::chrono::seconds>(timeout);

src/modules/cpu.cpp

@@ -38,7 +38,7 @@ std::tuple<uint16_t, std::string> waybar::modules::Cpu::getCpuUsage()
 {
   if (prev_times_.empty()) {
     prev_times_ = parseCpuinfo();
-    std::this_thread::sleep_for(chrono::milliseconds(100));
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
   }
   std::vector<std::tuple<size_t, size_t>> curr_times = parseCpuinfo();
   std::string tooltip;

src/modules/network.cpp

@@ -1,23 +1,16 @@
+#include <sys/eventfd.h>
 #include "modules/network.hpp"
 
 waybar::modules::Network::Network(const std::string& id, const Json::Value& config)
-  : ALabel(config, "{ifname}", 60), family_(AF_INET),
+  : ALabel(config, "{ifname}", 60), family_(AF_INET), efd_(-1), ev_fd_(-1),
     cidr_(-1), signal_strength_dbm_(0), signal_strength_(0)
 {
   label_.set_name("network");
   if (!id.empty()) {
     label_.get_style_context()->add_class(id);
   }
-  sock_fd_ = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+  createInfoSocket();
-  if (sock_fd_ < 0) {
+  createEventSocket();
-    throw std::runtime_error("Can't open network socket");
-  }
-  nladdr_.nl_family = AF_NETLINK;
-  nladdr_.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR;
-  if (bind(sock_fd_, reinterpret_cast<struct sockaddr *>(&nladdr_),
-    sizeof(nladdr_)) != 0) {
-    throw std::runtime_error("Can't bind network socket");
-  }
   if (config_["interface"].isString()) {
     ifid_ = if_nametoindex(config_["interface"].asCString());
     ifname_ = config_["interface"].asString();
@@ -32,73 +25,112 @@ waybar::modules::Network::Network(const std::string& id, const Json::Value& conf
       ifname_ = ifname;
     }
   }
-  initNL80211();
-  // Trigger first values
-  getInfo();
   dp.emit();
   worker();
 }
 
 waybar::modules::Network::~Network()
 {
-  close(sock_fd_);
+  if (ev_fd_ > -1) {
-  nl_socket_free(sk_);
+    eventfd_write(ev_fd_, 1);
+    std::this_thread::sleep_for(std::chrono::milliseconds(150));
+    close(ev_fd_);
+  }
+  if (efd_ > -1) {
+    close(efd_);
+  }
+  if (info_sock_ != nullptr) {
+    nl_socket_drop_membership(info_sock_, RTMGRP_LINK);
+    nl_socket_drop_membership(info_sock_, RTMGRP_IPV4_IFADDR);
+    nl_close(info_sock_);
+    nl_socket_free(info_sock_);
+  }
+  if (sk_ != nullptr) {
+    nl_close(sk_);
+    nl_socket_free(sk_);
+  }
+}
+
+void waybar::modules::Network::createInfoSocket()
+{
+  info_sock_ = nl_socket_alloc();
+  if (nl_connect(info_sock_, NETLINK_ROUTE) != 0) {
+		throw std::runtime_error("Can't connect network socket");
+	}
+  if (nl_socket_add_membership(info_sock_, RTMGRP_LINK) != 0) {
+    throw std::runtime_error("Can't add membership");
+  }
+  if (nl_socket_add_membership(info_sock_, RTMGRP_IPV4_IFADDR) != 0) {
+    throw std::runtime_error("Can't add membership");
+  }
+  nl_socket_disable_seq_check(info_sock_);
+  nl_socket_set_nonblocking(info_sock_);
+  nl_socket_modify_cb(info_sock_, NL_CB_MSG_IN, NL_CB_CUSTOM, handleEvents, this);
+  efd_ = epoll_create1(0);
+  if (efd_ < 0) {
+    throw std::runtime_error("Can't create epoll");
+  }
+  {
+    ev_fd_ = eventfd(0, EFD_NONBLOCK);
+    struct epoll_event event;
+    event.events = EPOLLIN | EPOLLET;
+    event.data.fd = ev_fd_;
+    if (epoll_ctl(efd_, EPOLL_CTL_ADD, ev_fd_, &event) == -1) {
+      throw std::runtime_error("Can't add epoll event");
+    }
+  }
+  {
+    auto fd = nl_socket_get_fd(info_sock_);
+    struct epoll_event event;
+    event.events = EPOLLIN;
+    event.data.fd = fd;
+    if (epoll_ctl(efd_, EPOLL_CTL_ADD, fd, &event) == -1) {
+      throw std::runtime_error("Can't add epoll event");
+    }
+  }
+}
+
+void waybar::modules::Network::createEventSocket()
+{
+  sk_ = nl_socket_alloc();
+	if (genl_connect(sk_) != 0) {
+    throw std::runtime_error("Can't connect to netlink socket");
+  }
+  nl_socket_disable_seq_check(sk_);
+  if (nl_socket_modify_cb(sk_, NL_CB_VALID, NL_CB_CUSTOM, handleScan, this) < 0) {
+    throw std::runtime_error("Can't set callback");
+  }
+  nl80211_id_ = genl_ctrl_resolve(sk_, "nl80211");
+  if (nl80211_id_ < 0) {
+    throw std::runtime_error("Can't resolve nl80211 interface");
+  }
 }
 
 void waybar::modules::Network::worker()
 {
-  thread_ = [this] {
-    char buf[4096];
-    auto len = netlinkResponse(sock_fd_, buf, sizeof(buf), RTMGRP_LINK | RTMGRP_IPV4_IFADDR);
-    if (len == 0) {
-      return;
-    }
-    bool need_update = false;
-    for (auto nh = reinterpret_cast<struct nlmsghdr *>(buf); NLMSG_OK(nh, len);
-      nh = NLMSG_NEXT(nh, len)) {
-      if (nh->nlmsg_type == NLMSG_DONE) {
-        break;
-      }
-      if (nh->nlmsg_type == NLMSG_ERROR) {
-        continue;
-      }
-      if (nh->nlmsg_type == RTM_NEWADDR) {
-        need_update = true;
-      }
-      if (nh->nlmsg_type < RTM_NEWADDR) {
-        auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
-        if (rtif->ifi_index == static_cast<int>(ifid_)) {
-          need_update = true;
-          if (!(rtif->ifi_flags & IFF_RUNNING)) {
-            disconnected();
-          }
-        }
-      }
-    }
-    if (ifid_ <= 0 && !config_["interface"].isString()) {
-      // Need to wait before get external interface
-      thread_.sleep_for(std::chrono::seconds(1));
-      ifid_ = getExternalInterface();
-      if (ifid_ > 0) {
-        char ifname[IF_NAMESIZE];
-        if_indextoname(ifid_, ifname);
-        ifname_ = ifname;
-        need_update = true;
-      }
-    }
-    if (need_update) {
-      if (ifid_ > 0) {
-        getInfo();
-      }
-      dp.emit();
-    }
-  };
   thread_timer_ = [this] {
-    thread_timer_.sleep_for(interval_);
     if (ifid_ > 0) {
       getInfo();
       dp.emit();
     }
+    thread_timer_.sleep_for(interval_);
+  };
+  thread_ = [this] {
+    struct epoll_event events[16];
+    int ec = epoll_wait(efd_, events, 16, -1);
+    if (ec > 0) {
+      for (auto i = 0; i < ec; i++) {
+        if (events[i].events & EPOLLIN
+          && events[i].data.fd == nl_socket_get_fd(info_sock_)) {
+          nl_recvmsgs_default(info_sock_);
+        } else {
+          thread_.stop();
+          break;
+        }
+      }
+    } else if (ec == -1) {
+      thread_.stop();
+    }
   };
 }
 
@@ -151,24 +183,6 @@ void waybar::modules::Network::disconnected()
   thread_.sleep_for(std::chrono::seconds(1));
 }
 
-void waybar::modules::Network::initNL80211()
-{
-  sk_ = nl_socket_alloc();
-	if (genl_connect(sk_) != 0) {
-    nl_socket_free(sk_);
-    throw std::runtime_error("Can't connect to netlink socket");
-  }
-  if (nl_socket_modify_cb(sk_, NL_CB_VALID, NL_CB_CUSTOM, scanCb, this) < 0) {
-    nl_socket_free(sk_);
-    throw std::runtime_error("Can't connect to netlink socket");
-  }
-  nl80211_id_ = genl_ctrl_resolve(sk_, "nl80211");
-  if (nl80211_id_ < 0) {
-    nl_socket_free(sk_);
-    throw std::runtime_error("Can't resolve nl80211 interface");
-  }
-}
-
 // Based on https://gist.github.com/Yawning/c70d804d4b8ae78cc698
 int waybar::modules::Network::getExternalInterface()
 {
@@ -192,7 +206,7 @@ int waybar::modules::Network::getExternalInterface()
   rt->rtm_table = RT_TABLE_MAIN;
 
   /* Issue the query. */
-  if (netlinkRequest(sock_fd_, req, reqlen) < 0) {
+  if (netlinkRequest(req, reqlen) < 0) {
     goto out;
   }
 
@@ -202,7 +216,7 @@ int waybar::modules::Network::getExternalInterface()
    * consume responses till NLMSG_DONE/NLMSG_ERROR is encountered).
    */
   do {
-    auto len = netlinkResponse(sock_fd_, resp, route_buffer_size);
+    auto len = netlinkResponse(resp, route_buffer_size);
     if (len < 0) {
       goto out;
     }
@@ -322,7 +336,7 @@ void waybar::modules::Network::getInterfaceAddress() {
   }
 }
 
-int waybar::modules::Network::netlinkRequest(int fd, void *req,
+int waybar::modules::Network::netlinkRequest(void *req,
   uint32_t reqlen, uint32_t groups)
 {
   struct sockaddr_nl sa = {};
@@ -330,10 +344,10 @@ int waybar::modules::Network::netlinkRequest(int fd, void *req,
   sa.nl_groups = groups;
   struct iovec iov = { req, reqlen };
   struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 };
-  return sendmsg(fd, &msg, 0);
+  return sendmsg(nl_socket_get_fd(info_sock_), &msg, 0);
 }
 
-int waybar::modules::Network::netlinkResponse(int fd, void *resp,
+int waybar::modules::Network::netlinkResponse(void *resp,
   uint32_t resplen, uint32_t groups)
 {
   struct sockaddr_nl sa = {};
@@ -341,14 +355,50 @@ int waybar::modules::Network::netlinkResponse(int fd, void *resp,
   sa.nl_groups = groups;
   struct iovec iov = { resp, resplen };
   struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 };
-  auto ret = recvmsg(fd, &msg, 0);
+  auto ret = recvmsg(nl_socket_get_fd(info_sock_), &msg, 0);
   if (msg.msg_flags & MSG_TRUNC) {
     return -1;
   }
   return ret;
 }
 
-int waybar::modules::Network::scanCb(struct nl_msg *msg, void *data) {
+int waybar::modules::Network::handleEvents(struct nl_msg *msg, void *data) {
+  auto net = static_cast<waybar::modules::Network *>(data);
+  bool need_update = false;
+  nlmsghdr *nh = nlmsg_hdr(msg);
+  if (nh->nlmsg_type == RTM_NEWADDR) {
+    need_update = true;
+  }
+  if (nh->nlmsg_type < RTM_NEWADDR) {
+    auto rtif = static_cast<struct ifinfomsg *>(NLMSG_DATA(nh));
+    if (rtif->ifi_index == static_cast<int>(net->ifid_)) {
+      need_update = true;
+      if (!(rtif->ifi_flags & IFF_RUNNING)) {
+        net->disconnected();
+      }
+    }
+  }
+  if (net->ifid_ <= 0 && !net->config_["interface"].isString()) {
+    // Need to wait before get external interface
+    net->thread_.sleep_for(std::chrono::seconds(1));
+    net->ifid_ = net->getExternalInterface();
+    if (net->ifid_ > 0) {
+      char ifname[IF_NAMESIZE];
+      if_indextoname(net->ifid_, ifname);
+      net->ifname_ = ifname;
+      need_update = true;
+    }
+  }
+  if (need_update) {
+    if (net->ifid_ > 0) {
+      net->getInfo();
+    }
+    net->dp.emit();
+  }
+  return NL_SKIP;
+}
+
+int waybar::modules::Network::handleScan(struct nl_msg *msg, void *data) {
   auto net = static_cast<waybar::modules::Network *>(data);
   auto gnlh = static_cast<genlmsghdr *>(nlmsg_data(nlmsg_hdr(msg)));
   struct nlattr* tb[NL80211_ATTR_MAX + 1];
@@ -404,7 +454,7 @@ void waybar::modules::Network::parseEssid(struct nlattr **bss)
 
 void waybar::modules::Network::parseSignal(struct nlattr **bss) {
   if (bss[NL80211_BSS_SIGNAL_MBM] != nullptr) {
-    // signalstrength in dBm
+    // signalstrength in dBm from mBm
     signal_strength_dbm_ =
       static_cast<int>(nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM])) / 100;
 
@@ -414,6 +464,9 @@ void waybar::modules::Network::parseSignal(struct nlattr **bss) {
     signal_strength_ = ((signal_strength_dbm_ - hardwareMin)
       / double{hardwareMax - hardwareMin}) * 100;
   }
+  if (bss[NL80211_BSS_SIGNAL_UNSPEC] != nullptr) {
+    signal_strength_ = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
+  }
 }
 
 bool waybar::modules::Network::associatedOrJoined(struct nlattr** bss)
@@ -446,5 +499,5 @@ auto waybar::modules::Network::getInfo() -> void
     nlmsg_free(nl_msg);
     return;
   }
-  nl_send_sync(sk_, nl_msg);
+  nl_send_auto(sk_, nl_msg);
 }

src/modules/sway/ipc/client.cpp

@@ -1,11 +1,18 @@
 #include "modules/sway/ipc/client.hpp"
 
 waybar::modules::sway::Ipc::Ipc()
-  : fd_(-1), fd_event_(-1)
+{
-{}
+  const std::string& socketPath = getSocketPath();
+  fd_ = open(socketPath);
+  fd_event_ = open(socketPath);
+}
 
 waybar::modules::sway::Ipc::~Ipc()
 {
+  // To fail the IPC header
+  write(fd_, "close-sway-ipc", 14);
+  write(fd_event_, "close-sway-ipc", 14);
+
   close(fd_);
   close(fd_event_);
 }
@@ -53,13 +60,6 @@ int waybar::modules::sway::Ipc::open(const std::string& socketPath) const
   return fd;
 }
 
-void waybar::modules::sway::Ipc::connect()
-{
-  const std::string& socketPath = getSocketPath();
-  fd_ = open(socketPath);
-  fd_event_ = open(socketPath);
-}
-
 struct waybar::modules::sway::Ipc::ipc_response
   waybar::modules::sway::Ipc::recv(int fd) const
 {
@@ -71,18 +71,23 @@ struct waybar::modules::sway::Ipc::ipc_response
   while (total < ipc_header_size_) {
     auto res = ::recv(fd, header.data() + total, ipc_header_size_ - total, 0);
     if (res <= 0) {
-      throw std::runtime_error("Unable to receive IPC response");
+      throw std::runtime_error("Unable to receive IPC header");
     }
     total += res;
   }
 
+  auto magic = std::string(header.data(), header.data() + ipc_magic_.size());
+  if (magic != ipc_magic_) {
+    throw std::runtime_error("Invalid IPC magic");
+  }
+
   total = 0;
   std::string payload;
   payload.reserve(data32[0] + 1);
   while (total < data32[0]) {
     auto res = ::recv(fd, payload.data() + total, data32[0] - total, 0);
     if (res < 0) {
-      throw std::runtime_error("Unable to receive IPC response");
+      throw std::runtime_error("Unable to receive IPC payload");
     }
     total += res;
   }

src/modules/sway/mode.cpp

@@ -7,7 +7,6 @@ waybar::modules::sway::Mode::Mode(const std::string& id, const Bar& bar, const J
   if (!id.empty()) {
     label_.get_style_context()->add_class(id);
   }
-  ipc_.connect();
   ipc_.subscribe("[ \"mode\" ]");
   // Launch worker
   worker();
@@ -20,14 +19,12 @@ void waybar::modules::sway::Mode::worker()
     try {
       auto res = ipc_.handleEvent();
       auto parsed = parser_.parse(res.payload);
-      if ((parsed["change"]) != "default" ) {
+      if (parsed["change"] != "default") {
         mode_ = parsed["change"].asString();
-        dp.emit();
+      } else {
-      }
-      else if ((parsed["change"]) == "default" ) {
         mode_.clear();
-        dp.emit();
       }
+      dp.emit();
     } catch (const std::exception& e) {
       std::cerr << "Mode: " << e.what() << std::endl;
     }

src/modules/sway/window.cpp

@@ -11,7 +11,6 @@ waybar::modules::sway::Window::Window(const std::string& id, const Bar &bar, con
     label_.set_hexpand(true);
     label_.set_ellipsize(Pango::EllipsizeMode::ELLIPSIZE_END);
   }
-  ipc_.connect();
   ipc_.subscribe("[\"window\",\"workspace\"]");
   getFocusedWindow();
   // Launch worker

src/modules/sway/workspaces.cpp

@@ -8,7 +8,6 @@ waybar::modules::sway::Workspaces::Workspaces(const std::string& id, const Bar&
   if (!id.empty()) {
     box_.get_style_context()->add_class(id);
   }
-  ipc_.connect();
   ipc_.subscribe("[ \"workspace\" ]");
   // Launch worker
   worker();
@@ -21,9 +20,9 @@ void waybar::modules::sway::Workspaces::worker()
       // Wait for the name of the output
       if (!config_["all-outputs"].asBool() && bar_.output_name.empty()) {
         while (bar_.output_name.empty()) {
-          thread_.sleep_for(chrono::milliseconds(150));
+          thread_.sleep_for(std::chrono::milliseconds(150));
         }
-      } else if (thread_.isRunning() && !workspaces_.empty()) {
+      } else if (!workspaces_.empty()) {
         ipc_.handleEvent();
       }
       {