Settings: semi-automatic callback cleanup

src/client/clientlauncher.cpp

@@ -71,9 +71,8 @@ static void dump_start_data(const GameStartData &data)
 ClientLauncher::~ClientLauncher()
 {
 	delete input;
-	g_settings->deregisterChangedCallback("dpi_change_notifier", setting_changed_callback, this);
-	g_settings->deregisterChangedCallback("display_density_factor", setting_changed_callback, this);
-	g_settings->deregisterChangedCallback("gui_scaling", setting_changed_callback, this);
+
+	g_settings->deregisterAllChangedCallbacks(this);
 
 	delete g_fontengine;
 	g_fontengine = nullptr;

src/client/clientmap.cpp

@@ -140,8 +140,7 @@ void ClientMap::onSettingChanged(std::string_view name, bool all)
 
 ClientMap::~ClientMap()
 {
-	for (const auto &name : ClientMap_settings)
-		g_settings->deregisterChangedCallback(name, on_settings_changed, this);
+	g_settings->deregisterAllChangedCallbacks(this);
 }
 
 void ClientMap::updateCamera(v3f pos, v3f dir, f32 fov, v3s16 offset, video::SColor light_color)

src/client/clouds.cpp

@@ -76,10 +76,7 @@ Clouds::Clouds(scene::ISceneManager* mgr, IShaderSource *ssrc,
 
 Clouds::~Clouds()
 {
-	g_settings->deregisterChangedCallback("enable_3d_clouds",
-		&cloud_3d_setting_changed, this);
-	g_settings->deregisterChangedCallback("soft_clouds",
-		&cloud_3d_setting_changed, this);
+	g_settings->deregisterAllChangedCallbacks(this);
 }
 
 void Clouds::OnRegisterSceneNode()

src/client/fontengine.cpp

@@ -68,8 +68,7 @@ FontEngine::FontEngine(gui::IGUIEnvironment* env) :
 /******************************************************************************/
 FontEngine::~FontEngine()
 {
-	for (auto name : settings)
-		g_settings->deregisterChangedCallback(name, font_setting_changed, this);
+	g_settings->deregisterAllChangedCallbacks(this);
 
 	cleanCache();
 }

src/client/game.cpp

@@ -451,8 +451,7 @@ public:
 
 	~GameGlobalShaderConstantSetter()
 	{
-		for (auto &name : SETTING_CALLBACKS)
-			g_settings->deregisterChangedCallback(name, settingsCallback, this);
+		g_settings->deregisterAllChangedCallbacks(this);
 	}
 
 	void onSetConstants(video::IMaterialRendererServices *services) override
@@ -1046,48 +1045,8 @@ Game::~Game()
 
 	clearTextureNameCache();
 
-	g_settings->deregisterChangedCallback("chat_log_level",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("disable_escape_sequences",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("doubletap_jump",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("enable_clouds",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("enable_joysticks",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("enable_particles",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("enable_fog",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("mouse_sensitivity",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("joystick_frustum_sensitivity",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("repeat_place_time",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("repeat_dig_time",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("noclip",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("free_move",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("fog_start",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("cinematic",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("cinematic_camera_smoothing",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("camera_smoothing",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("invert_mouse",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("enable_hotbar_mouse_wheel",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("invert_hotbar_mouse_wheel",
-		&settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("pause_on_lost_focus",
-		&settingChangedCallback, this);
+	g_settings->deregisterAllChangedCallbacks(this);
+
 	if (m_rendering_engine)
 		m_rendering_engine->finalize();
 }

src/client/hud.cpp

@@ -170,9 +170,7 @@ void Hud::readScalingSetting()
 
 Hud::~Hud()
 {
-	g_settings->deregisterChangedCallback("dpi_change_notifier", setting_changed_callback, this);
-	g_settings->deregisterChangedCallback("display_density_factor", setting_changed_callback, this);
-	g_settings->deregisterChangedCallback("hud_scaling", setting_changed_callback, this);
+	g_settings->deregisterAllChangedCallbacks(this);
 
 	if (m_selection_mesh)
 		m_selection_mesh->drop();

src/client/localplayer.cpp

@@ -60,10 +60,7 @@ void PlayerSettings::registerSettingsCallback()
 
 void PlayerSettings::deregisterSettingsCallback()
 {
-	for (auto &name : PlayerSettings_names) {
-		g_settings->deregisterChangedCallback(name,
-			&PlayerSettings::settingsChangedCallback, this);
-	}
+	g_settings->deregisterAllChangedCallbacks(this);
 }
 
 void PlayerSettings::settingsChangedCallback(const std::string &name, void *data)

src/client/renderingengine.cpp

@@ -238,8 +238,7 @@ RenderingEngine::~RenderingEngine()
 {
 	sanity_check(s_singleton == this);
 
-	g_settings->deregisterChangedCallback("fullscreen", settingChangedCallback, this);
-	g_settings->deregisterChangedCallback("window_maximized", settingChangedCallback, this);
+	g_settings->deregisterAllChangedCallbacks(this);
 
 	core.reset();
 	m_device->closeDevice();

src/gui/guiEngine.cpp

@@ -404,7 +404,7 @@ void GUIEngine::run()
 /******************************************************************************/
 GUIEngine::~GUIEngine()
 {
-	g_settings->deregisterChangedCallback("fullscreen", fullscreenChangedCallback, this);
+	g_settings->deregisterAllChangedCallbacks(this);
 
 	// deinitialize script first. gc destructors might depend on other stuff
 	infostream << "GUIEngine: Deinitializing scripting" << std::endl;

src/settings.cpp

@@ -1048,21 +1048,22 @@ void Settings::registerChangedCallback(const std::string &name,
 	m_callbacks[name].emplace_back(cbf, userdata);
 }
 
-void Settings::deregisterChangedCallback(const std::string &name,
-	SettingsChangedCallback cbf, void *userdata)
+size_t Settings::deregisterAllChangedCallbacks(const void *userdata)
 {
 	MutexAutoLock lock(m_callback_mutex);
-	SettingsCallbackMap::iterator it_cbks = m_callbacks.find(name);
 
-	if (it_cbks != m_callbacks.end()) {
-		SettingsCallbackList &cbks = it_cbks->second;
-
-		SettingsCallbackList::iterator position =
-			std::find(cbks.begin(), cbks.end(), std::make_pair(cbf, userdata));
-
-		if (position != cbks.end())
-			cbks.erase(position);
+	size_t n_removed = 0;
+	for (auto &settings : m_callbacks) {
+		for (auto cb = settings.second.begin(); cb != settings.second.end();) {
+			if (cb->second == userdata) {
+				cb = settings.second.erase(cb);
+				n_removed++;
+			} else {
+				++cb;
+			}
+		}
 	}
+	return n_removed;
 }
 
 void Settings::removeSecureSettings()

src/settings.h

@@ -238,8 +238,7 @@ public:
 
 	void registerChangedCallback(const std::string &name,
 		SettingsChangedCallback cbf, void *userdata = NULL);
-	void deregisterChangedCallback(const std::string &name,
-		SettingsChangedCallback cbf, void *userdata = NULL);
+	size_t deregisterAllChangedCallbacks(const void *userdata);
 
 	void removeSecureSettings();