Userland: Update IPC calls to use proxies

This updates all existing code to use the auto-generated client
methods instead of post_message/send_sync.

Userland/Applications/DisplaySettings/DisplaySettings.cpp

@@ -264,9 +264,9 @@ void DisplaySettingsWidget::send_settings_to_window_server()
     }
 
     if (current_resolution != m_monitor_widget->desktop_resolution() || current_scale_factor != m_monitor_widget->desktop_scale_factor()) {
-        auto result = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetResolution>(m_monitor_widget->desktop_resolution(), m_monitor_widget->desktop_scale_factor());
+        auto result = GUI::WindowServerConnection::the().set_resolution(m_monitor_widget->desktop_resolution(), m_monitor_widget->desktop_scale_factor());
-        if (!result->success()) {
+        if (!result.success()) {
-            GUI::MessageBox::show(nullptr, String::formatted("Reverting to resolution {}x{} @ {}x", result->resolution().width(), result->resolution().height(), result->scale_factor()),
+            GUI::MessageBox::show(nullptr, String::formatted("Reverting to resolution {}x{} @ {}x", result.resolution().width(), result.resolution().height(), result.scale_factor()),
                 "Unable to set resolution", GUI::MessageBox::Type::Error);
         } else {
             auto box = GUI::MessageBox::construct(window(), String::formatted("Do you want to keep the new settings? They will be reverted after 10 seconds."),
@@ -282,9 +282,9 @@ void DisplaySettingsWidget::send_settings_to_window_server()
 
             // If the user selects "No", closes the window or the window gets closed by the 10 seconds timer, revert the changes.
             if (box->exec() != GUI::MessageBox::ExecYes) {
-                result = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetResolution>(current_resolution, current_scale_factor);
+                result = GUI::WindowServerConnection::the().set_resolution(current_resolution, current_scale_factor);
-                if (!result->success()) {
+                if (!result.success()) {
-                    GUI::MessageBox::show(nullptr, String::formatted("Reverting to resolution {}x{} @ {}x", result->resolution().width(), result->resolution().height(), result->scale_factor()),
+                    GUI::MessageBox::show(nullptr, String::formatted("Reverting to resolution {}x{} @ {}x", result.resolution().width(), result.resolution().height(), result.scale_factor()),
                         "Unable to set resolution", GUI::MessageBox::Type::Error);
                 }
             }

Userland/Applications/MouseSettings/MouseSettingsWindow.cpp

@@ -24,9 +24,9 @@ constexpr int double_click_speed_default = 250;
 void MouseSettingsWindow::update_window_server()
 {
     const float factor = m_speed_slider->value() / speed_slider_scale;
-    GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetMouseAcceleration>(factor);
+    GUI::WindowServerConnection::the().set_mouse_acceleration(factor);
-    GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetScrollStepSize>(m_scroll_length_spinbox->value());
+    GUI::WindowServerConnection::the().set_scroll_step_size(m_scroll_length_spinbox->value());
-    GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetDoubleClickSpeed>(m_double_click_speed_slider->value());
+    GUI::WindowServerConnection::the().set_double_click_speed(m_double_click_speed_slider->value());
 }
 
 void MouseSettingsWindow::reset_default_values()
@@ -48,12 +48,12 @@ MouseSettingsWindow::MouseSettingsWindow()
     m_speed_slider->on_change = [&](const int value) {
         m_speed_label->set_text(String::formatted("{} %", value));
     };
-    const int slider_value = float { speed_slider_scale } * GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::GetMouseAcceleration>()->factor();
+    const int slider_value = float { speed_slider_scale } * GUI::WindowServerConnection::the().get_mouse_acceleration().factor();
     m_speed_slider->set_value(slider_value);
 
     m_scroll_length_spinbox = *main_widget.find_descendant_of_type_named<GUI::SpinBox>("scroll_length_spinbox");
     m_scroll_length_spinbox->set_min(WindowServer::scroll_step_size_min);
-    m_scroll_length_spinbox->set_value(GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::GetScrollStepSize>()->step_size());
+    m_scroll_length_spinbox->set_value(GUI::WindowServerConnection::the().get_scroll_step_size().step_size());
 
     m_double_click_speed_label = *main_widget.find_descendant_of_type_named<GUI::Label>("double_click_speed_label");
     m_double_click_speed_slider = *main_widget.find_descendant_of_type_named<GUI::HorizontalSlider>("double_click_speed_slider");
@@ -62,7 +62,7 @@ MouseSettingsWindow::MouseSettingsWindow()
     m_double_click_speed_slider->on_change = [&](const int value) {
         m_double_click_speed_label->set_text(String::formatted("{} ms", value));
     };
-    m_double_click_speed_slider->set_value(GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::GetDoubleClickSpeed>()->speed());
+    m_double_click_speed_slider->set_value(GUI::WindowServerConnection::the().get_double_click_speed().speed());
 
     m_ok_button = *main_widget.find_descendant_of_type_named<GUI::Button>("ok_button");
     m_ok_button->on_click = [this](auto) {

Userland/Applications/SpaceAnalyzer/TreeMapWidget.cpp

@@ -316,7 +316,7 @@ void TreeMapWidget::mousewheel_event(GUI::MouseEvent& event)
 {
     int delta = event.wheel_delta();
     // FIXME: The wheel_delta is premultiplied in the window server, we actually want a raw value here.
-    int step_size = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::GetScrollStepSize>()->step_size();
+    int step_size = GUI::WindowServerConnection::the().get_scroll_step_size().step_size();
     if (delta > 0) {
         size_t step_back = delta / step_size;
         if (step_back > m_viewpoint)

Userland/Demos/CatDog/main.cpp

@@ -134,7 +134,7 @@ public:
         VERIFY(window_id >= 0);
 
         set_global_cursor_tracking(true);
-        GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetGlobalCursorTracking>(window_id, true);
+        GUI::WindowServerConnection::the().set_global_cursor_tracking(window_id, true);
     }
 
     void start_the_timer() { m_timer.start(); }

Userland/Demos/Eyes/EyesWidget.cpp

@@ -22,7 +22,7 @@ void EyesWidget::track_cursor_globally()
     VERIFY(window_id >= 0);
 
     set_global_cursor_tracking(true);
-    GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetGlobalCursorTracking>(window_id, true);
+    GUI::WindowServerConnection::the().set_global_cursor_tracking(window_id, true);
 }
 
 void EyesWidget::mousemove_event(GUI::MouseEvent& event)

Userland/DevTools/HackStudio/LanguageClient.cpp

@@ -43,14 +43,14 @@ void LanguageClient::open_file(const String& path, int fd)
 {
     if (!m_connection_wrapper.connection())
         return;
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::FileOpened(path, fd));
+    m_connection_wrapper.connection()->async_file_opened(path, fd);
 }
 
 void LanguageClient::set_file_content(const String& path, const String& content)
 {
     if (!m_connection_wrapper.connection())
         return;
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::SetFileContent(path, content));
+    m_connection_wrapper.connection()->async_set_file_content(path, content);
 }
 
 void LanguageClient::insert_text(const String& path, const String& text, size_t line, size_t column)
@@ -58,14 +58,14 @@ void LanguageClient::insert_text(const String& path, const String& text, size_t
     if (!m_connection_wrapper.connection())
         return;
     //    set_active_client();
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::FileEditInsertText(path, text, line, column));
+    m_connection_wrapper.connection()->async_file_edit_insert_text(path, text, line, column);
 }
 
 void LanguageClient::remove_text(const String& path, size_t from_line, size_t from_column, size_t to_line, size_t to_column)
 {
     if (!m_connection_wrapper.connection())
         return;
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::FileEditRemoveText(path, from_line, from_column, to_line, to_column));
+    m_connection_wrapper.connection()->async_file_edit_remove_text(path, from_line, from_column, to_line, to_column);
 }
 
 void LanguageClient::request_autocomplete(const String& path, size_t cursor_line, size_t cursor_column)
@@ -73,7 +73,7 @@ void LanguageClient::request_autocomplete(const String& path, size_t cursor_line
     if (!m_connection_wrapper.connection())
         return;
     set_active_client();
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::AutoCompleteSuggestions(GUI::AutocompleteProvider::ProjectLocation { path, cursor_line, cursor_column }));
+    m_connection_wrapper.connection()->async_auto_complete_suggestions(GUI::AutocompleteProvider::ProjectLocation { path, cursor_line, cursor_column });
 }
 
 void LanguageClient::provide_autocomplete_suggestions(const Vector<GUI::AutocompleteProvider::Entry>& suggestions) const
@@ -88,7 +88,7 @@ void LanguageClient::set_autocomplete_mode(const String& mode)
 {
     if (!m_connection_wrapper.connection())
         return;
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::SetAutoCompleteMode(mode));
+    m_connection_wrapper.connection()->async_set_auto_complete_mode(mode);
 }
 
 void LanguageClient::set_active_client()
@@ -110,7 +110,7 @@ void LanguageClient::search_declaration(const String& path, size_t line, size_t
     if (!m_connection_wrapper.connection())
         return;
     set_active_client();
-    m_connection_wrapper.connection()->post_message(Messages::LanguageServer::FindDeclaration(GUI::AutocompleteProvider::ProjectLocation { path, line, column }));
+    m_connection_wrapper.connection()->async_find_declaration(GUI::AutocompleteProvider::ProjectLocation { path, line, column });
 }
 
 void LanguageClient::declaration_found(const String& file, size_t line, size_t column) const
@@ -221,7 +221,7 @@ void ServerConnectionWrapper::try_respawn_connection()
     project().for_each_text_file([this](const ProjectFile& file) {
         if (file.code_document().language() != m_language)
             return;
-        m_connection->post_message(Messages::LanguageServer::SetFileContent(file.code_document().file_path(), file.document().text()));
+        m_connection->async_set_file_content(file.code_document().file_path(), file.document().text());
     });
 }
 

Userland/DevTools/HackStudio/LanguageClient.h

@@ -38,7 +38,7 @@ public:
 
     virtual void handshake() override
     {
-        send_sync<Messages::LanguageServer::Greet>(m_project_path);
+        greet(m_project_path);
     }
 
     WeakPtr<LanguageClient> language_client() { return m_current_language_client; }

Userland/DevTools/HackStudio/LanguageServers/ClientConnection.cpp

@@ -81,7 +81,7 @@ void ClientConnection::auto_complete_suggestions(GUI::AutocompleteProvider::Proj
 
     GUI::TextPosition autocomplete_position = { (size_t)location.line, (size_t)max(location.column, location.column - 1) };
     Vector<GUI::AutocompleteProvider::Entry> suggestions = m_autocomplete_engine->get_suggestions(location.file, autocomplete_position);
-    post_message(Messages::LanguageClient::AutoCompleteSuggestions(move(suggestions)));
+    async_auto_complete_suggestions(move(suggestions));
 }
 
 void ClientConnection::set_file_content(String const& filename, String const& content)
@@ -115,12 +115,12 @@ void ClientConnection::find_declaration(GUI::AutocompleteProvider::ProjectLocati
     }
 
     dbgln_if(LANGUAGE_SERVER_DEBUG, "declaration location: {} {}:{}", decl_location.value().file, decl_location.value().line, decl_location.value().column);
-    post_message(Messages::LanguageClient::DeclarationLocation(GUI::AutocompleteProvider::ProjectLocation { decl_location.value().file, decl_location.value().line, decl_location.value().column }));
+    async_declaration_location(GUI::AutocompleteProvider::ProjectLocation { decl_location.value().file, decl_location.value().line, decl_location.value().column });
 }
 
 void ClientConnection::set_declarations_of_document_callback(ClientConnection& instance, const String& filename, Vector<GUI::AutocompleteProvider::Declaration>&& declarations)
 {
-    instance.post_message(Messages::LanguageClient::DeclarationsInDocument(filename, move(declarations)));
+    instance.async_declarations_in_document(filename, move(declarations));
 }
 
 }

Userland/DevTools/HackStudio/LanguageServers/ClientConnection.h

@@ -19,8 +19,7 @@
 namespace LanguageServers {
 
 class ClientConnection
-    : public IPC::ClientConnection<LanguageClientEndpoint, LanguageServerEndpoint>
+    : public IPC::ClientConnection<LanguageClientEndpoint, LanguageServerEndpoint> {
-{
 public:
     explicit ClientConnection(NonnullRefPtr<Core::LocalSocket>, int client_id);
     ~ClientConnection() override;

Userland/DevTools/IPCCompiler/main.cpp

@@ -254,9 +254,9 @@ int main(int argc, char** argv)
 #include <LibIPC/Decoder.h>
 #include <LibIPC/Dictionary.h>
 #include <LibIPC/Encoder.h>
-#include <LibIPC/Stub.h>
 #include <LibIPC/File.h>
 #include <LibIPC/Message.h>
+#include <LibIPC/Stub.h>
 )~~~");
 
     for (auto& endpoint : endpoints) {

Userland/Libraries/LibAudio/ClientConnection.cpp

@@ -16,14 +16,14 @@ ClientConnection::ClientConnection()
 
 void ClientConnection::handshake()
 {
-    send_sync<Messages::AudioServer::Greet>();
+    greet();
 }
 
 void ClientConnection::enqueue(const Buffer& buffer)
 {
     for (;;) {
-        auto response = send_sync<Messages::AudioServer::EnqueueBuffer>(buffer.anonymous_buffer(), buffer.id(), buffer.sample_count());
+        auto response = enqueue_buffer(buffer.anonymous_buffer(), buffer.id(), buffer.sample_count());
-        if (response->success())
+        if (response.success())
             break;
         sleep(1);
     }
@@ -31,53 +31,53 @@ void ClientConnection::enqueue(const Buffer& buffer)
 
 bool ClientConnection::try_enqueue(const Buffer& buffer)
 {
-    auto response = send_sync<Messages::AudioServer::EnqueueBuffer>(buffer.anonymous_buffer(), buffer.id(), buffer.sample_count());
+    auto response = enqueue_buffer(buffer.anonymous_buffer(), buffer.id(), buffer.sample_count());
-    return response->success();
+    return response.success();
 }
 
 bool ClientConnection::get_muted()
 {
-    return send_sync<Messages::AudioServer::GetMuted>()->muted();
+    return IPCProxy::get_muted().muted();
 }
 
 void ClientConnection::set_muted(bool muted)
 {
-    send_sync<Messages::AudioServer::SetMuted>(muted);
+    IPCProxy::set_muted(muted);
 }
 
 int ClientConnection::get_main_mix_volume()
 {
-    return send_sync<Messages::AudioServer::GetMainMixVolume>()->volume();
+    return IPCProxy::get_main_mix_volume().volume();
 }
 
 void ClientConnection::set_main_mix_volume(int volume)
 {
-    send_sync<Messages::AudioServer::SetMainMixVolume>(volume);
+    IPCProxy::set_main_mix_volume(volume);
 }
 
 int ClientConnection::get_remaining_samples()
 {
-    return send_sync<Messages::AudioServer::GetRemainingSamples>()->remaining_samples();
+    return IPCProxy::get_remaining_samples().remaining_samples();
 }
 
 int ClientConnection::get_played_samples()
 {
-    return send_sync<Messages::AudioServer::GetPlayedSamples>()->played_samples();
+    return IPCProxy::get_played_samples().played_samples();
 }
 
 void ClientConnection::set_paused(bool paused)
 {
-    send_sync<Messages::AudioServer::SetPaused>(paused);
+    IPCProxy::set_paused(paused);
 }
 
 void ClientConnection::clear_buffer(bool paused)
 {
-    send_sync<Messages::AudioServer::ClearBuffer>(paused);
+    IPCProxy::clear_buffer(paused);
 }
 
 int ClientConnection::get_playing_buffer()
 {
-    return send_sync<Messages::AudioServer::GetPlayingBuffer>()->buffer_id();
+    return IPCProxy::get_playing_buffer().buffer_id();
 }
 
 void ClientConnection::finished_playing_buffer(i32 buffer_id)

Userland/Libraries/LibDesktop/Launcher.cpp

@@ -40,7 +40,7 @@ class LaunchServerConnection : public IPC::ServerConnection<LaunchClientEndpoint
 public:
     virtual void handshake() override
     {
-        send_sync<Messages::LaunchServer::Greet>();
+        greet();
     }
 
 private:
@@ -99,7 +99,7 @@ bool Launcher::seal_allowlist()
 
 bool Launcher::open(const URL& url, const String& handler_name)
 {
-    return connection().send_sync<Messages::LaunchServer::OpenURL>(url, handler_name)->response();
+    return connection().open_url(url, handler_name).response();
 }
 
 bool Launcher::open(const URL& url, const Details& details)
@@ -110,12 +110,12 @@ bool Launcher::open(const URL& url, const Details& details)
 
 Vector<String> Launcher::get_handlers_for_url(const URL& url)
 {
-    return connection().send_sync<Messages::LaunchServer::GetHandlersForURL>(url.to_string())->handlers();
+    return connection().get_handlers_for_url(url.to_string()).handlers();
 }
 
 auto Launcher::get_handlers_with_details_for_url(const URL& url) -> NonnullRefPtrVector<Details>
 {
-    auto details = connection().send_sync<Messages::LaunchServer::GetHandlersWithDetailsForURL>(url.to_string())->handlers_details();
+    auto details = connection().get_handlers_with_details_for_url(url.to_string()).handlers_details();
     NonnullRefPtrVector<Details> handlers_with_details;
     for (auto& value : details) {
         handlers_with_details.append(Details::from_details_str(value));

Userland/Libraries/LibGUI/Application.cpp

@@ -186,7 +186,7 @@ void Application::tooltip_show_timer_did_fire()
     Gfx::IntRect desktop_rect = Desktop::the().rect();
 
     const int margin = 30;
-    Gfx::IntPoint adjusted_pos = WindowServerConnection::the().send_sync<Messages::WindowServer::GetGlobalCursorPosition>()->position();
+    Gfx::IntPoint adjusted_pos = WindowServerConnection::the().get_global_cursor_position().position();
 
     adjusted_pos.translate_by(0, 18);
 

Userland/Libraries/LibGUI/Clipboard.cpp

@@ -19,7 +19,7 @@ class ClipboardServerConnection : public IPC::ServerConnection<ClipboardClientEn
 public:
     virtual void handshake() override
     {
-        send_sync<Messages::ClipboardServer::Greet>();
+        greet();
     }
 
 private:
@@ -56,12 +56,12 @@ Clipboard::Clipboard()
 
 Clipboard::DataAndType Clipboard::data_and_type() const
 {
-    auto response = connection().send_sync<Messages::ClipboardServer::GetClipboardData>();
+    auto response = connection().get_clipboard_data();
-    if (!response->data().is_valid())
+    if (!response.data().is_valid())
         return {};
-    auto data = ByteBuffer::copy(response->data().data<void>(), response->data().size());
+    auto data = ByteBuffer::copy(response.data().data<void>(), response.data().size());
-    auto type = response->mime_type();
+    auto type = response.mime_type();
-    auto metadata = response->metadata().entries();
+    auto metadata = response.metadata().entries();
     return { data, type, metadata };
 }
 
@@ -75,7 +75,7 @@ void Clipboard::set_data(ReadonlyBytes data, const String& type, const HashMap<S
     if (!data.is_empty())
         memcpy(buffer.data<void>(), data.data(), data.size());
 
-    connection().send_sync<Messages::ClipboardServer::SetClipboardData>(move(buffer), type, metadata);
+    connection().set_clipboard_data(move(buffer), type, metadata);
 }
 
 void ClipboardServerConnection::clipboard_data_changed(String const& mime_type)

Userland/Libraries/LibGUI/Desktop.cpp

@@ -34,18 +34,18 @@ void Desktop::did_receive_screen_rect(Badge<WindowServerConnection>, const Gfx::
 
 void Desktop::set_background_color(const StringView& background_color)
 {
-    WindowServerConnection::the().post_message(Messages::WindowServer::SetBackgroundColor(background_color));
+    WindowServerConnection::the().async_set_background_color(background_color);
 }
 
 void Desktop::set_wallpaper_mode(const StringView& mode)
 {
-    WindowServerConnection::the().post_message(Messages::WindowServer::SetWallpaperMode(mode));
+    WindowServerConnection::the().async_set_wallpaper_mode(mode);
 }
 
 bool Desktop::set_wallpaper(const StringView& path, bool save_config)
 {
-    WindowServerConnection::the().post_message(Messages::WindowServer::AsyncSetWallpaper(path));
+    WindowServerConnection::the().async_set_wallpaper(path);
-    auto ret_val = WindowServerConnection::the().wait_for_specific_message<Messages::WindowClient::AsyncSetWallpaperFinished>()->success();
+    auto ret_val = WindowServerConnection::the().wait_for_specific_message<Messages::WindowClient::SetWallpaperFinished>()->success();
 
     if (ret_val && save_config) {
         RefPtr<Core::ConfigFile> config = Core::ConfigFile::get_for_app("WindowManager");
@@ -59,7 +59,7 @@ bool Desktop::set_wallpaper(const StringView& path, bool save_config)
 
 String Desktop::wallpaper() const
 {
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWallpaper>()->path();
+    return WindowServerConnection::the().get_wallpaper().path();
 }
 
 }

Userland/Libraries/LibGUI/DisplayLink.cpp

@@ -43,7 +43,7 @@ static i32 s_next_callback_id = 1;
 i32 DisplayLink::register_callback(Function<void(i32)> callback)
 {
     if (callbacks().is_empty())
-        WindowServerConnection::the().post_message(Messages::WindowServer::EnableDisplayLink());
+        WindowServerConnection::the().async_enable_display_link();
 
     i32 callback_id = s_next_callback_id++;
     callbacks().set(callback_id, adopt_ref(*new DisplayLinkCallback(callback_id, move(callback))));
@@ -57,7 +57,7 @@ bool DisplayLink::unregister_callback(i32 callback_id)
     callbacks().remove(callback_id);
 
     if (callbacks().is_empty())
-        WindowServerConnection::the().post_message(Messages::WindowServer::DisableDisplayLink());
+        WindowServerConnection::the().async_disable_display_link();
 
     return true;
 }

Userland/Libraries/LibGUI/DragOperation.cpp

@@ -37,12 +37,12 @@ DragOperation::Outcome DragOperation::exec()
         drag_bitmap = bitmap->to_shareable_bitmap();
     }
 
-    auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::StartDrag>(
+    auto response = WindowServerConnection::the().start_drag(
         m_mime_data->text(),
         m_mime_data->all_data(),
         drag_bitmap);
 
-    if (!response->started()) {
+    if (!response.started()) {
         m_outcome = Outcome::Cancelled;
         return m_outcome;
     }

Userland/Libraries/LibGUI/Menu.cpp

@@ -72,20 +72,20 @@ void Menu::realize_if_needed(const RefPtr<Action>& default_action)
 void Menu::popup(const Gfx::IntPoint& screen_position, const RefPtr<Action>& default_action)
 {
     realize_if_needed(default_action);
-    WindowServerConnection::the().post_message(Messages::WindowServer::PopupMenu(m_menu_id, screen_position));
+    WindowServerConnection::the().async_popup_menu(m_menu_id, screen_position);
 }
 
 void Menu::dismiss()
 {
     if (m_menu_id == -1)
         return;
-    WindowServerConnection::the().post_message(Messages::WindowServer::DismissMenu(m_menu_id));
+    WindowServerConnection::the().async_dismiss_menu(m_menu_id);
 }
 
 int Menu::realize_menu(RefPtr<Action> default_action)
 {
     unrealize_menu();
-    m_menu_id = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateMenu>(m_name)->menu_id();
+    m_menu_id = WindowServerConnection::the().create_menu(m_name).menu_id();
 
     dbgln_if(MENU_DEBUG, "GUI::Menu::realize_menu(): New menu ID: {}", m_menu_id);
     VERIFY(m_menu_id > 0);
@@ -94,14 +94,14 @@ int Menu::realize_menu(RefPtr<Action> default_action)
         item.set_menu_id({}, m_menu_id);
         item.set_identifier({}, i);
         if (item.type() == MenuItem::Type::Separator) {
-            WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuSeparator>(m_menu_id);
+            WindowServerConnection::the().add_menu_separator(m_menu_id);
             continue;
         }
         if (item.type() == MenuItem::Type::Submenu) {
             auto& submenu = *item.submenu();
             submenu.realize_if_needed(default_action);
             auto icon = submenu.icon() ? submenu.icon()->to_shareable_bitmap() : Gfx::ShareableBitmap();
-            WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuItem>(m_menu_id, i, submenu.menu_id(), submenu.name(), true, false, false, false, "", icon, false);
+            WindowServerConnection::the().add_menu_item(m_menu_id, i, submenu.menu_id(), submenu.name(), true, false, false, false, "", icon, false);
             continue;
         }
         if (item.type() == MenuItem::Type::Action) {
@@ -110,7 +110,7 @@ int Menu::realize_menu(RefPtr<Action> default_action)
             bool exclusive = action.group() && action.group()->is_exclusive() && action.is_checkable();
             bool is_default = (default_action.ptr() == &action);
             auto icon = action.icon() ? action.icon()->to_shareable_bitmap() : Gfx::ShareableBitmap();
-            WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuItem>(m_menu_id, i, -1, action.text(), action.is_enabled(), action.is_checkable(), action.is_checkable() ? action.is_checked() : false, is_default, shortcut_text, icon, exclusive);
+            WindowServerConnection::the().add_menu_item(m_menu_id, i, -1, action.text(), action.is_enabled(), action.is_checkable(), action.is_checkable() ? action.is_checked() : false, is_default, shortcut_text, icon, exclusive);
         }
     }
     all_menus().set(m_menu_id, this);
@@ -123,7 +123,7 @@ void Menu::unrealize_menu()
     if (m_menu_id == -1)
         return;
     all_menus().remove(m_menu_id);
-    WindowServerConnection::the().send_sync<Messages::WindowServer::DestroyMenu>(m_menu_id);
+    WindowServerConnection::the().destroy_menu(m_menu_id);
     m_menu_id = -1;
 }
 

Userland/Libraries/LibGUI/MenuItem.cpp

@@ -74,7 +74,7 @@ void MenuItem::update_window_server()
         return;
     auto& action = *m_action;
     auto shortcut_text = action.shortcut().is_valid() ? action.shortcut().to_string() : String();
-    WindowServerConnection::the().send_sync<Messages::WindowServer::UpdateMenuItem>(m_menu_id, m_identifier, -1, action.text(), action.is_enabled(), action.is_checkable(), action.is_checkable() ? action.is_checked() : false, m_default, shortcut_text);
+    WindowServerConnection::the().update_menu_item(m_menu_id, m_identifier, -1, action.text(), action.is_enabled(), action.is_checkable(), action.is_checkable() ? action.is_checked() : false, m_default, shortcut_text);
 }
 
 void MenuItem::set_menu_id(Badge<Menu>, unsigned int menu_id)

Userland/Libraries/LibGUI/Menubar.cpp

@@ -30,14 +30,14 @@ Menu& Menubar::add_menu(String name)
 
 int Menubar::realize_menubar()
 {
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::CreateMenubar>()->menubar_id();
+    return WindowServerConnection::the().create_menubar().menubar_id();
 }
 
 void Menubar::unrealize_menubar()
 {
     if (m_menubar_id == -1)
         return;
-    WindowServerConnection::the().send_sync<Messages::WindowServer::DestroyMenubar>(m_menubar_id);
+    WindowServerConnection::the().destroy_menubar(m_menubar_id);
     m_menubar_id = -1;
 }
 
@@ -49,7 +49,7 @@ void Menubar::notify_added_to_window(Badge<Window>)
     for (auto& menu : m_menus) {
         int menu_id = menu.realize_menu();
         VERIFY(menu_id != -1);
-        WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuToMenubar>(m_menubar_id, menu_id);
+        WindowServerConnection::the().add_menu_to_menubar(m_menubar_id, menu_id);
     }
 }
 

Userland/Libraries/LibGUI/Notification.cpp

@@ -20,7 +20,7 @@ class NotificationServerConnection : public IPC::ServerConnection<NotificationCl
 public:
     virtual void handshake() override
     {
-        send_sync<Messages::NotificationServer::Greet>();
+        greet();
     }
 
     virtual void die() override
@@ -51,7 +51,7 @@ void Notification::show()
     VERIFY(!m_shown && !m_destroyed);
     auto icon = m_icon ? m_icon->to_shareable_bitmap() : Gfx::ShareableBitmap();
     m_connection = NotificationServerConnection::construct(this);
-    m_connection->send_sync<Messages::NotificationServer::ShowNotification>(m_text, m_title, icon);
+    m_connection->show_notification(m_text, m_title, icon);
     m_shown = true;
 }
 
@@ -59,7 +59,7 @@ void Notification::close()
 {
     VERIFY(m_shown);
     if (!m_destroyed) {
-        m_connection->send_sync<Messages::NotificationServer::CloseNotification>();
+        m_connection->close_notification();
         connection_closed();
         return;
     }
@@ -73,13 +73,13 @@ bool Notification::update()
     }
 
     if (m_text_dirty || m_title_dirty) {
-        m_connection->send_sync<Messages::NotificationServer::UpdateNotificationText>(m_text, m_title);
+        m_connection->update_notification_text(m_text, m_title);
         m_text_dirty = false;
         m_title_dirty = false;
     }
 
     if (m_icon_dirty) {
-        m_connection->send_sync<Messages::NotificationServer::UpdateNotificationIcon>(m_icon ? m_icon->to_shareable_bitmap() : Gfx::ShareableBitmap());
+        m_connection->update_notification_icon(m_icon ? m_icon->to_shareable_bitmap() : Gfx::ShareableBitmap());
         m_icon_dirty = false;
     }
 

Userland/Libraries/LibGUI/Window.cpp

@@ -109,7 +109,7 @@ void Window::move_to_front()
     if (!is_visible())
         return;
 
-    WindowServerConnection::the().send_sync<Messages::WindowServer::MoveWindowToFront>(m_window_id);
+    WindowServerConnection::the().move_window_to_front(m_window_id);
 }
 
 void Window::show()
@@ -119,7 +119,7 @@ void Window::show()
 
     auto* parent_window = find_parent_window();
 
-    auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateWindow>(
+    auto response = WindowServerConnection::the().create_window(
         m_rect_when_windowless,
         !m_moved_by_client,
         m_has_alpha_channel,
@@ -138,7 +138,7 @@ void Window::show()
         (i32)m_window_type,
         m_title_when_windowless,
         parent_window ? parent_window->window_id() : 0);
-    m_window_id = response->window_id();
+    m_window_id = response.window_id();
     m_visible = true;
 
     apply_icon();
@@ -178,10 +178,10 @@ void Window::hide()
 {
     if (!is_visible())
         return;
-    auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::DestroyWindow>(m_window_id);
+    auto response = WindowServerConnection::the().destroy_window(m_window_id);
     server_did_destroy();
 
-    for (auto child_window_id : response->destroyed_window_ids()) {
+    for (auto child_window_id : response.destroyed_window_ids()) {
         if (auto* window = Window::from_window_id(child_window_id)) {
             window->server_did_destroy();
         }
@@ -205,27 +205,27 @@ void Window::set_title(String title)
     m_title_when_windowless = move(title);
     if (!is_visible())
         return;
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowTitle>(m_window_id, m_title_when_windowless);
+    WindowServerConnection::the().set_window_title(m_window_id, m_title_when_windowless);
 }
 
 String Window::title() const
 {
     if (!is_visible())
         return m_title_when_windowless;
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowTitle>(m_window_id)->title();
+    return WindowServerConnection::the().get_window_title(m_window_id).title();
 }
 
 Gfx::IntRect Window::applet_rect_on_screen() const
 {
     VERIFY(m_window_type == WindowType::Applet);
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::GetAppletRectOnScreen>(m_window_id)->rect();
+    return WindowServerConnection::the().get_applet_rect_on_screen(m_window_id).rect();
 }
 
 Gfx::IntRect Window::rect() const
 {
     if (!is_visible())
         return m_rect_when_windowless;
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowRect>(m_window_id)->rect();
+    return WindowServerConnection::the().get_window_rect(m_window_id).rect();
 }
 
 void Window::set_rect(const Gfx::IntRect& a_rect)
@@ -240,7 +240,7 @@ void Window::set_rect(const Gfx::IntRect& a_rect)
             m_main_widget->resize(m_rect_when_windowless.size());
         return;
     }
-    auto window_rect = WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowRect>(m_window_id, a_rect)->rect();
+    auto window_rect = WindowServerConnection::the().set_window_rect(m_window_id, a_rect).rect();
     if (m_back_store && m_back_store->size() != window_rect.size())
         m_back_store = nullptr;
     if (m_front_store && m_front_store->size() != window_rect.size())
@@ -254,7 +254,7 @@ Gfx::IntSize Window::minimum_size() const
     if (!is_visible())
         return m_minimum_size_when_windowless;
 
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowMinimumSize>(m_window_id)->size();
+    return WindowServerConnection::the().get_window_minimum_size(m_window_id).size();
 }
 
 void Window::set_minimum_size(const Gfx::IntSize& size)
@@ -263,7 +263,7 @@ void Window::set_minimum_size(const Gfx::IntSize& size)
     m_minimum_size_when_windowless = size;
 
     if (is_visible())
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowMinimumSize>(m_window_id, size);
+        WindowServerConnection::the().set_window_minimum_size(m_window_id, size);
 }
 
 void Window::center_on_screen()
@@ -297,10 +297,8 @@ void Window::set_window_type(WindowType window_type)
 
 void Window::make_window_manager(unsigned event_mask)
 {
-    GUI::WindowManagerServerConnection::the()
+    GUI::WindowManagerServerConnection::the().async_set_event_mask(event_mask);
-        .post_message(Messages::WindowManagerServer::SetEventMask(event_mask));
+    GUI::WindowManagerServerConnection::the().async_set_manager_window(m_window_id);
-    GUI::WindowManagerServerConnection::the()
-        .post_message(Messages::WindowManagerServer::SetManagerWindow(m_window_id));
 }
 
 void Window::set_cursor(Gfx::StandardCursor cursor)
@@ -418,7 +416,7 @@ void Window::handle_multi_paint_event(MultiPaintEvent& event)
         set_current_backing_store(*m_back_store, true);
 
     if (is_visible())
-        WindowServerConnection::the().post_message(Messages::WindowServer::DidFinishPainting(m_window_id, rects));
+        WindowServerConnection::the().async_did_finish_painting(m_window_id, rects);
 }
 
 void Window::handle_key_event(KeyEvent& event)
@@ -599,7 +597,7 @@ void Window::force_update()
     if (!is_visible())
         return;
     auto rect = this->rect();
-    WindowServerConnection::the().post_message(Messages::WindowServer::InvalidateRect(m_window_id, { { 0, 0, rect.width(), rect.height() } }, true));
+    WindowServerConnection::the().async_invalidate_rect(m_window_id, { { 0, 0, rect.width(), rect.height() } }, true);
 }
 
 void Window::update(const Gfx::IntRect& a_rect)
@@ -619,7 +617,7 @@ void Window::update(const Gfx::IntRect& a_rect)
             auto rects = move(m_pending_paint_event_rects);
             if (rects.is_empty())
                 return;
-            WindowServerConnection::the().post_message(Messages::WindowServer::InvalidateRect(m_window_id, rects, false));
+            WindowServerConnection::the().async_invalidate_rect(m_window_id, rects, false);
         });
     }
     m_pending_paint_event_rects.append(a_rect);
@@ -698,7 +696,7 @@ void Window::set_has_alpha_channel(bool value)
     m_back_store = nullptr;
     m_front_store = nullptr;
 
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowHasAlphaChannel>(m_window_id, value);
+    WindowServerConnection::the().set_window_has_alpha_channel(m_window_id, value);
     update();
 }
 
@@ -713,7 +711,7 @@ void Window::set_opacity(float opacity)
     m_opacity_when_windowless = opacity;
     if (!is_visible())
         return;
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowOpacity>(m_window_id, opacity);
+    WindowServerConnection::the().set_window_opacity(m_window_id, opacity);
 }
 
 void Window::set_alpha_hit_threshold(float threshold)
@@ -727,7 +725,7 @@ void Window::set_alpha_hit_threshold(float threshold)
     m_alpha_hit_threshold = threshold;
     if (!is_visible())
         return;
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowAlphaHitThreshold>(m_window_id, threshold);
+    WindowServerConnection::the().set_window_alpha_hit_threshold(m_window_id, threshold);
 }
 
 void Window::set_hovered_widget(Widget* widget)
@@ -747,7 +745,7 @@ void Window::set_hovered_widget(Widget* widget)
 void Window::set_current_backing_store(WindowBackingStore& backing_store, bool flush_immediately)
 {
     auto& bitmap = backing_store.bitmap();
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBackingStore>(m_window_id, 32, bitmap.pitch(), bitmap.anon_fd(), backing_store.serial(), bitmap.has_alpha_channel(), bitmap.size(), flush_immediately);
+    WindowServerConnection::the().set_window_backing_store(m_window_id, 32, bitmap.pitch(), bitmap.anon_fd(), backing_store.serial(), bitmap.has_alpha_channel(), bitmap.size(), flush_immediately);
 }
 
 void Window::flip(const Vector<Gfx::IntRect, 32>& dirty_rects)
@@ -832,12 +830,12 @@ void Window::apply_icon()
     if (!is_visible())
         return;
 
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowIconBitmap>(m_window_id, m_icon->to_shareable_bitmap());
+    WindowServerConnection::the().set_window_icon_bitmap(m_window_id, m_icon->to_shareable_bitmap());
 }
 
 void Window::start_interactive_resize()
 {
-    WindowServerConnection::the().post_message(Messages::WindowServer::StartWindowResize(m_window_id));
+    WindowServerConnection::the().async_start_window_resize(m_window_id);
 }
 
 Vector<Widget*> Window::focusable_widgets(FocusSource source) const
@@ -888,7 +886,7 @@ void Window::set_fullscreen(bool fullscreen)
     m_fullscreen = fullscreen;
     if (!is_visible())
         return;
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetFullscreen>(m_window_id, fullscreen);
+    WindowServerConnection::the().set_fullscreen(m_window_id, fullscreen);
 }
 
 void Window::set_frameless(bool frameless)
@@ -898,7 +896,7 @@ void Window::set_frameless(bool frameless)
     m_frameless = frameless;
     if (!is_visible())
         return;
-    WindowServerConnection::the().send_sync<Messages::WindowServer::SetFrameless>(m_window_id, frameless);
+    WindowServerConnection::the().set_frameless(m_window_id, frameless);
 }
 
 bool Window::is_maximized() const
@@ -906,7 +904,7 @@ bool Window::is_maximized() const
     if (!is_visible())
         return false;
 
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::IsMaximized>(m_window_id)->maximized();
+    return WindowServerConnection::the().is_maximized(m_window_id).maximized();
 }
 
 void Window::schedule_relayout()
@@ -924,7 +922,7 @@ void Window::schedule_relayout()
 
 void Window::refresh_system_theme()
 {
-    WindowServerConnection::the().post_message(Messages::WindowServer::RefreshSystemTheme());
+    WindowServerConnection::the().async_refresh_system_theme();
 }
 
 void Window::for_each_window(Badge<WindowServerConnection>, Function<void(Window&)> callback)
@@ -981,7 +979,7 @@ void Window::set_base_size(const Gfx::IntSize& base_size)
         return;
     m_base_size = base_size;
     if (is_visible())
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBaseSizeAndSizeIncrement>(m_window_id, m_base_size, m_size_increment);
+        WindowServerConnection::the().set_window_base_size_and_size_increment(m_window_id, m_base_size, m_size_increment);
 }
 
 void Window::set_size_increment(const Gfx::IntSize& size_increment)
@@ -990,7 +988,7 @@ void Window::set_size_increment(const Gfx::IntSize& size_increment)
         return;
     m_size_increment = size_increment;
     if (is_visible())
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBaseSizeAndSizeIncrement>(m_window_id, m_base_size, m_size_increment);
+        WindowServerConnection::the().set_window_base_size_and_size_increment(m_window_id, m_base_size, m_size_increment);
 }
 
 void Window::set_resize_aspect_ratio(const Optional<Gfx::IntSize>& ratio)
@@ -1000,7 +998,7 @@ void Window::set_resize_aspect_ratio(const Optional<Gfx::IntSize>& ratio)
 
     m_resize_aspect_ratio = ratio;
     if (is_visible())
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowResizeAspectRatio>(m_window_id, m_resize_aspect_ratio);
+        WindowServerConnection::the().set_window_resize_aspect_ratio(m_window_id, m_resize_aspect_ratio);
 }
 
 void Window::did_add_widget(Badge<Widget>, Widget&)
@@ -1024,7 +1022,7 @@ void Window::did_remove_widget(Badge<Widget>, Widget& widget)
 void Window::set_progress(Optional<int> progress)
 {
     VERIFY(m_window_id);
-    WindowServerConnection::the().post_message(Messages::WindowServer::SetWindowProgress(m_window_id, progress));
+    WindowServerConnection::the().async_set_window_progress(m_window_id, progress);
 }
 
 void Window::update_cursor()
@@ -1041,9 +1039,9 @@ void Window::update_cursor()
     m_effective_cursor = new_cursor;
 
     if (m_custom_cursor)
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowCustomCursor>(m_window_id, m_custom_cursor->to_shareable_bitmap());
+        WindowServerConnection::the().set_window_custom_cursor(m_window_id, m_custom_cursor->to_shareable_bitmap());
     else
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowCursor>(m_window_id, (u32)m_effective_cursor);
+        WindowServerConnection::the().set_window_cursor(m_window_id, (u32)m_effective_cursor);
 }
 
 void Window::focus_a_widget_if_possible(FocusSource source)
@@ -1078,7 +1076,7 @@ void Window::set_menubar(RefPtr<Menubar> menubar)
     m_menubar = move(menubar);
     if (m_window_id && m_menubar) {
         m_menubar->notify_added_to_window({});
-        WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowMenubar>(m_window_id, m_menubar->menubar_id());
+        WindowServerConnection::the().set_window_menubar(m_window_id, m_menubar->menubar_id());
     }
 }
 
@@ -1086,14 +1084,14 @@ bool Window::is_modified() const
 {
     if (!m_window_id)
         return false;
-    return WindowServerConnection::the().send_sync<Messages::WindowServer::IsWindowModified>(m_window_id)->modified();
+    return WindowServerConnection::the().is_window_modified(m_window_id).modified();
 }
 
 void Window::set_modified(bool modified)
 {
     if (!m_window_id)
         return;
-    WindowServerConnection::the().post_message(Messages::WindowServer::SetWindowModified(m_window_id, modified));
+    WindowServerConnection::the().async_set_window_modified(m_window_id, modified);
 }
 
 }

Userland/Libraries/LibGUI/WindowServerConnection.cpp

@@ -42,9 +42,9 @@ static void set_system_theme_from_anonymous_buffer(Core::AnonymousBuffer buffer)
 
 void WindowServerConnection::handshake()
 {
-    auto response = send_sync<Messages::WindowServer::Greet>();
+    auto response = greet();
-    set_system_theme_from_anonymous_buffer(response->theme_buffer());
+    set_system_theme_from_anonymous_buffer(response.theme_buffer());
-    Desktop::the().did_receive_screen_rect({}, response->screen_rect());
+    Desktop::the().did_receive_screen_rect({}, response.screen_rect());
 }
 
 void WindowServerConnection::update_system_theme(Core::AnonymousBuffer const& theme_buffer)
@@ -293,7 +293,7 @@ void WindowServerConnection::screen_rect_changed(Gfx::IntRect const& rect)
     });
 }
 
-void WindowServerConnection::async_set_wallpaper_finished(bool)
+void WindowServerConnection::set_wallpaper_finished(bool)
 {
     // This is handled manually by Desktop::set_wallpaper().
 }
@@ -337,7 +337,7 @@ void WindowServerConnection::display_link_notification()
 
 void WindowServerConnection::ping()
 {
-    post_message(Messages::WindowServer::Pong());
+    async_pong();
 }
 
 }

Userland/Libraries/LibGUI/WindowServerConnection.h

@@ -48,7 +48,7 @@ private:
     virtual void menu_item_left(i32, u32) override;
     virtual void menu_visibility_did_change(i32, bool) override;
     virtual void screen_rect_changed(Gfx::IntRect const&) override;
-    virtual void async_set_wallpaper_finished(bool) override;
+    virtual void set_wallpaper_finished(bool) override;
     virtual void drag_dropped(i32, Gfx::IntPoint const&, String const&, HashMap<String, ByteBuffer> const&) override;
     virtual void drag_accepted() override;
     virtual void drag_cancelled() override;

Userland/Libraries/LibIPC/ClientConnection.h

@@ -17,13 +17,16 @@ NonnullRefPtr<T> new_client_connection(Args&&... args)
 }
 
 template<typename ClientEndpoint, typename ServerEndpoint>
-class ClientConnection : public Connection<ServerEndpoint, ClientEndpoint>, public ServerEndpoint::Stub {
+class ClientConnection : public Connection<ServerEndpoint, ClientEndpoint>
+    , public ServerEndpoint::Stub
+    , public ClientEndpoint::template Proxy<ServerEndpoint> {
 public:
-    using ClientProxy = typename ClientEndpoint::Proxy;
     using ServerStub = typename ServerEndpoint::Stub;
+    using IPCProxy = ClientEndpoint::template Proxy<ServerEndpoint>;
 
     ClientConnection(ServerStub& stub, NonnullRefPtr<Core::LocalSocket> socket, int client_id)
         : IPC::Connection<ServerEndpoint, ClientEndpoint>(stub, move(socket))
+        , ClientEndpoint::template Proxy<ServerEndpoint>(*this, {})
         , m_client_id(client_id)
     {
         VERIFY(this->socket().is_connected());

Userland/Libraries/LibIPC/Connection.h

@@ -29,7 +29,6 @@ template<typename LocalEndpoint, typename PeerEndpoint>
 class Connection : public Core::Object {
 public:
     using LocalStub = typename LocalEndpoint::Stub;
-    using PeerProxy = typename PeerEndpoint::Proxy;
 
     Connection(LocalStub& local_stub, NonnullRefPtr<Core::LocalSocket> socket)
         : m_local_stub(local_stub)

Userland/Libraries/LibIPC/ServerConnection.h

@@ -11,13 +11,16 @@
 namespace IPC {
 
 template<typename ClientEndpoint, typename ServerEndpoint>
-class ServerConnection : public IPC::Connection<ClientEndpoint, ServerEndpoint>, public ClientEndpoint::Stub {
+class ServerConnection : public IPC::Connection<ClientEndpoint, ServerEndpoint>
+    , public ClientEndpoint::Stub
+    , public ServerEndpoint::template Proxy<ClientEndpoint> {
 public:
     using ClientStub = typename ClientEndpoint::Stub;
-    using ServerProxy = typename ServerEndpoint::Proxy;
+    using IPCProxy = ServerEndpoint::template Proxy<ClientEndpoint>;
 
     ServerConnection(ClientStub& local_endpoint, const StringView& address)
         : Connection<ClientEndpoint, ServerEndpoint>(local_endpoint, Core::LocalSocket::construct())
+        , ServerEndpoint::template Proxy<ClientEndpoint>(*this, {})
     {
         // We want to rate-limit our clients
         this->socket().set_blocking(true);

Userland/Libraries/LibImageDecoderClient/Client.cpp

@@ -23,7 +23,7 @@ void Client::die()
 
 void Client::handshake()
 {
-    send_sync<Messages::ImageDecoderServer::Greet>();
+    greet();
 }
 
 void Client::dummy()

Userland/Libraries/LibProtocol/RequestClient.cpp

@@ -18,12 +18,12 @@ RequestClient::RequestClient()
 
 void RequestClient::handshake()
 {
-    send_sync<Messages::RequestServer::Greet>();
+    greet();
 }
 
 bool RequestClient::is_supported_protocol(const String& protocol)
 {
-    return send_sync<Messages::RequestServer::IsSupportedProtocol>(protocol)->supported();
+    return IPCProxy::is_supported_protocol(protocol).supported();
 }
 
 template<typename RequestHashMapTraits>
@@ -33,29 +33,30 @@ RefPtr<Request> RequestClient::start_request(const String& method, const String&
     for (auto& it : request_headers)
         header_dictionary.add(it.key, it.value);
 
-    auto response = send_sync<Messages::RequestServer::StartRequest>(method, url, header_dictionary, ByteBuffer::copy(request_body));
+    auto response = IPCProxy::start_request(method, url, header_dictionary, ByteBuffer::copy(request_body));
-    auto request_id = response->request_id();
+    auto request_id = response.request_id();
-    if (request_id < 0 || !response->response_fd().has_value())
+    if (request_id < 0 || !response.response_fd().has_value())
         return nullptr;
-    auto response_fd = response->response_fd().value().take_fd();
+    auto response_fd = response.response_fd().value().take_fd();
     auto request = Request::create_from_id({}, *this, request_id);
     request->set_request_fd({}, response_fd);
     m_requests.set(request_id, request);
     return request;
+    return nullptr;
 }
 
 bool RequestClient::stop_request(Badge<Request>, Request& request)
 {
     if (!m_requests.contains(request.id()))
         return false;
-    return send_sync<Messages::RequestServer::StopRequest>(request.id())->success();
+    return IPCProxy::stop_request(request.id()).success();
 }
 
 bool RequestClient::set_certificate(Badge<Request>, Request& request, String certificate, String key)
 {
     if (!m_requests.contains(request.id()))
         return false;
-    return send_sync<Messages::RequestServer::SetCertificate>(request.id(), move(certificate), move(key))->success();
+    return IPCProxy::set_certificate(request.id(), move(certificate), move(key)).success();
 }
 
 void RequestClient::request_finished(i32 request_id, bool success, u32 total_size)

Userland/Libraries/LibProtocol/WebSocketClient.cpp

@@ -17,7 +17,7 @@ WebSocketClient::WebSocketClient()
 
 void WebSocketClient::handshake()
 {
-    send_sync<Messages::WebSocketServer::Greet>();
+    greet();
 }
 
 RefPtr<WebSocket> WebSocketClient::connect(const URL& url, const String& origin, const Vector<String>& protocols, const Vector<String>& extensions, const HashMap<String, String>& request_headers)
@@ -25,8 +25,8 @@ RefPtr<WebSocket> WebSocketClient::connect(const URL& url, const String& origin,
     IPC::Dictionary header_dictionary;
     for (auto& it : request_headers)
         header_dictionary.add(it.key, it.value);
-    auto response = send_sync<Messages::WebSocketServer::Connect>(url, origin, protocols, extensions, header_dictionary);
+    auto response = IPCProxy::connect(url, origin, protocols, extensions, header_dictionary);
-    auto connection_id = response->connection_id();
+    auto connection_id = response.connection_id();
     if (connection_id < 0)
         return nullptr;
     auto connection = WebSocket::create_from_id({}, *this, connection_id);
@@ -38,28 +38,28 @@ u32 WebSocketClient::ready_state(Badge<WebSocket>, WebSocket& connection)
 {
     if (!m_connections.contains(connection.id()))
         return (u32)WebSocket::ReadyState::Closed;
-    return send_sync<Messages::WebSocketServer::ReadyState>(connection.id())->ready_state();
+    return IPCProxy::ready_state(connection.id()).ready_state();
 }
 
 void WebSocketClient::send(Badge<WebSocket>, WebSocket& connection, ByteBuffer data, bool is_text)
 {
     if (!m_connections.contains(connection.id()))
         return;
-    post_message(Messages::WebSocketServer::Send(connection.id(), is_text, move(data)));
+    async_send(connection.id(), is_text, move(data));
 }
 
 void WebSocketClient::close(Badge<WebSocket>, WebSocket& connection, u16 code, String message)
 {
     if (!m_connections.contains(connection.id()))
         return;
-    post_message(Messages::WebSocketServer::Close(connection.id(), code, move(message)));
+    async_close(connection.id(), code, move(message));
 }
 
 bool WebSocketClient::set_certificate(Badge<WebSocket>, WebSocket& connection, String certificate, String key)
 {
     if (!m_connections.contains(connection.id()))
         return false;
-    return send_sync<Messages::WebSocketServer::SetCertificate>(connection.id(), move(certificate), move(key))->success();
+    return IPCProxy::set_certificate(connection.id(), move(certificate), move(key)).success();
 }
 
 void WebSocketClient::connected(i32 connection_id)

Userland/Libraries/LibSymbolClient/Client.cpp

@@ -20,7 +20,7 @@ Client::Client()
 
 void Client::handshake()
 {
-    send_sync<Messages::SymbolServer::Greet>();
+    greet();
 }
 
 void Client::dummy()
@@ -29,16 +29,16 @@ void Client::dummy()
 
 Optional<Symbol> Client::symbolicate(const String& path, FlatPtr address)
 {
-    auto response = send_sync<Messages::SymbolServer::Symbolicate>(path, address);
+    auto response = IPCProxy::symbolicate(path, address);
-    if (!response->success())
+    if (!response.success())
         return {};
 
     return Symbol {
         .address = address,
-        .name = response->name(),
+        .name = response.name(),
-        .offset = response->offset(),
+        .offset = response.offset(),
-        .filename = response->filename(),
+        .filename = response.filename(),
-        .line_number = response->line()
+        .line_number = response.line()
     };
 }
 

Userland/Libraries/LibWeb/OutOfProcessWebView.cpp

@@ -68,26 +68,26 @@ void OutOfProcessWebView::create_client()
         });
     };
 
-    client().post_message(Messages::WebContentServer::UpdateSystemTheme(Gfx::current_system_theme_buffer()));
+    client().async_update_system_theme(Gfx::current_system_theme_buffer());
-    client().post_message(Messages::WebContentServer::UpdateScreenRect(GUI::Desktop::the().rect()));
+    client().async_update_screen_rect(GUI::Desktop::the().rect());
 }
 
 void OutOfProcessWebView::load(const URL& url)
 {
     m_url = url;
-    client().post_message(Messages::WebContentServer::LoadURL(url));
+    client().async_load_url(url);
 }
 
 void OutOfProcessWebView::load_html(const StringView& html, const URL& url)
 {
     m_url = url;
-    client().post_message(Messages::WebContentServer::LoadHTML(html, url));
+    client().async_load_html(html, url);
 }
 
 void OutOfProcessWebView::load_empty_document()
 {
     m_url = {};
-    client().post_message(Messages::WebContentServer::LoadHTML("", {}));
+    client().async_load_html("", {});
 }
 
 void OutOfProcessWebView::paint_event(GUI::PaintEvent& event)
@@ -119,7 +119,7 @@ void OutOfProcessWebView::resize_event(GUI::ResizeEvent& event)
 
 void OutOfProcessWebView::handle_resize()
 {
-    client().post_message(Messages::WebContentServer::SetViewportRect(Gfx::IntRect({ horizontal_scrollbar().value(), vertical_scrollbar().value() }, available_size())));
+    client().async_set_viewport_rect(Gfx::IntRect({ horizontal_scrollbar().value(), vertical_scrollbar().value() }, available_size()));
 
     if (m_client_state.has_usable_bitmap) {
         // NOTE: We keep the outgoing front bitmap as a backup so we have something to paint until we get a new one.
@@ -128,12 +128,12 @@ void OutOfProcessWebView::handle_resize()
 
     if (m_client_state.front_bitmap) {
         m_client_state.front_bitmap = nullptr;
-        client().post_message(Messages::WebContentServer::RemoveBackingStore(m_client_state.front_bitmap_id));
+        client().async_remove_backing_store(m_client_state.front_bitmap_id);
     }
 
     if (m_client_state.back_bitmap) {
         m_client_state.back_bitmap = nullptr;
-        client().post_message(Messages::WebContentServer::RemoveBackingStore(m_client_state.back_bitmap_id));
+        client().async_remove_backing_store(m_client_state.back_bitmap_id);
     }
 
     m_client_state.front_bitmap_id = -1;
@@ -146,13 +146,13 @@ void OutOfProcessWebView::handle_resize()
     if (auto new_bitmap = Gfx::Bitmap::create_shareable(Gfx::BitmapFormat::BGRx8888, available_size())) {
         m_client_state.front_bitmap = move(new_bitmap);
         m_client_state.front_bitmap_id = m_client_state.next_bitmap_id++;
-        client().post_message(Messages::WebContentServer::AddBackingStore(m_client_state.front_bitmap_id, m_client_state.front_bitmap->to_shareable_bitmap()));
+        client().async_add_backing_store(m_client_state.front_bitmap_id, m_client_state.front_bitmap->to_shareable_bitmap());
     }
 
     if (auto new_bitmap = Gfx::Bitmap::create_shareable(Gfx::BitmapFormat::BGRx8888, available_size())) {
         m_client_state.back_bitmap = move(new_bitmap);
         m_client_state.back_bitmap_id = m_client_state.next_bitmap_id++;
-        client().post_message(Messages::WebContentServer::AddBackingStore(m_client_state.back_bitmap_id, m_client_state.back_bitmap->to_shareable_bitmap()));
+        client().async_add_backing_store(m_client_state.back_bitmap_id, m_client_state.back_bitmap->to_shareable_bitmap());
     }
 
     request_repaint();
@@ -160,39 +160,39 @@ void OutOfProcessWebView::handle_resize()
 
 void OutOfProcessWebView::keydown_event(GUI::KeyEvent& event)
 {
-    client().post_message(Messages::WebContentServer::KeyDown(event.key(), event.modifiers(), event.code_point()));
+    client().async_key_down(event.key(), event.modifiers(), event.code_point());
 }
 
 void OutOfProcessWebView::mousedown_event(GUI::MouseEvent& event)
 {
-    client().post_message(Messages::WebContentServer::MouseDown(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers()));
+    client().async_mouse_down(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
 }
 
 void OutOfProcessWebView::mouseup_event(GUI::MouseEvent& event)
 {
-    client().post_message(Messages::WebContentServer::MouseUp(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers()));
+    client().async_mouse_up(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
 }
 
 void OutOfProcessWebView::mousemove_event(GUI::MouseEvent& event)
 {
-    client().post_message(Messages::WebContentServer::MouseMove(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers()));
+    client().async_mouse_move(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
 }
 
 void OutOfProcessWebView::mousewheel_event(GUI::MouseEvent& event)
 {
-    client().post_message(Messages::WebContentServer::MouseWheel(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+    client().async_mouse_wheel(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers(), event.wheel_delta());
 }
 
 void OutOfProcessWebView::theme_change_event(GUI::ThemeChangeEvent& event)
 {
     GUI::AbstractScrollableWidget::theme_change_event(event);
-    client().post_message(Messages::WebContentServer::UpdateSystemTheme(Gfx::current_system_theme_buffer()));
+    client().async_update_system_theme(Gfx::current_system_theme_buffer());
     request_repaint();
 }
 
 void OutOfProcessWebView::screen_rect_change_event(GUI::ScreenRectChangeEvent& event)
 {
-    client().post_message(Messages::WebContentServer::UpdateScreenRect(event.rect()));
+    client().async_update_screen_rect(event.rect());
 }
 
 void OutOfProcessWebView::notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id)
@@ -360,7 +360,7 @@ void OutOfProcessWebView::notify_server_did_set_cookie(Badge<WebContentClient>,
 
 void OutOfProcessWebView::did_scroll()
 {
-    client().post_message(Messages::WebContentServer::SetViewportRect(visible_content_rect()));
+    client().async_set_viewport_rect(visible_content_rect());
     request_repaint();
 }
 
@@ -370,7 +370,7 @@ void OutOfProcessWebView::request_repaint()
     // it won't have a back bitmap yet, so we can just skip repaint requests.
     if (!m_client_state.back_bitmap)
         return;
-    client().post_message(Messages::WebContentServer::Paint(m_client_state.back_bitmap->rect().translated(horizontal_scrollbar().value(), vertical_scrollbar().value()), m_client_state.back_bitmap_id));
+    client().async_paint(m_client_state.back_bitmap->rect().translated(horizontal_scrollbar().value(), vertical_scrollbar().value()), m_client_state.back_bitmap_id);
 }
 
 WebContentClient& OutOfProcessWebView::client()
@@ -381,22 +381,22 @@ WebContentClient& OutOfProcessWebView::client()
 
 void OutOfProcessWebView::debug_request(const String& request, const String& argument)
 {
-    client().post_message(Messages::WebContentServer::DebugRequest(request, argument));
+    client().async_debug_request(request, argument);
 }
 
 void OutOfProcessWebView::get_source()
 {
-    client().post_message(Messages::WebContentServer::GetSource());
+    client().async_get_source();
 }
 
 void OutOfProcessWebView::js_console_initialize()
 {
-    client().post_message(Messages::WebContentServer::JSConsoleInitialize());
+    client().async_jsconsole_initialize();
 }
 
 void OutOfProcessWebView::js_console_input(const String& js_source)
 {
-    client().post_message(Messages::WebContentServer::JSConsoleInput(js_source));
+    client().async_jsconsole_input(js_source);
 }
 
 }

Userland/Libraries/LibWeb/WebContentClient.cpp

@@ -26,7 +26,7 @@ void WebContentClient::die()
 
 void WebContentClient::handshake()
 {
-    send_sync<Messages::WebContentServer::Greet>();
+    greet();
 }
 
 void WebContentClient::did_paint(const Gfx::IntRect&, i32 bitmap_id)

Userland/Services/AudioServer/ClientConnection.cpp

@@ -46,17 +46,17 @@ void ClientConnection::die()
 
 void ClientConnection::did_finish_playing_buffer(Badge<BufferQueue>, int buffer_id)
 {
-    post_message(Messages::AudioClient::FinishedPlayingBuffer(buffer_id));
+    async_finished_playing_buffer(buffer_id);
 }
 
 void ClientConnection::did_change_muted_state(Badge<Mixer>, bool muted)
 {
-    post_message(Messages::AudioClient::MutedStateChanged(muted));
+    async_muted_state_changed(muted);
 }
 
 void ClientConnection::did_change_main_mix_volume(Badge<Mixer>, int volume)
 {
-    post_message(Messages::AudioClient::MainMixVolumeChanged(volume));
+    async_main_mix_volume_changed(volume);
 }
 
 void ClientConnection::greet()

Userland/Services/AudioServer/ClientConnection.h

@@ -20,8 +20,7 @@ namespace AudioServer {
 class BufferQueue;
 class Mixer;
 
-class ClientConnection final : public IPC::ClientConnection<AudioClientEndpoint, AudioServerEndpoint>
+class ClientConnection final : public IPC::ClientConnection<AudioClientEndpoint, AudioServerEndpoint> {
-{
     C_OBJECT(ClientConnection)
 public:
     explicit ClientConnection(NonnullRefPtr<Core::LocalSocket>, int client_id, Mixer& mixer);

Userland/Services/Clipboard/ClientConnection.cpp

@@ -52,7 +52,7 @@ Messages::ClipboardServer::GetClipboardDataResponse ClientConnection::get_clipbo
 
 void ClientConnection::notify_about_clipboard_change()
 {
-    post_message(Messages::ClipboardClient::ClipboardDataChanged(Storage::the().mime_type()));
+    async_clipboard_data_changed(Storage::the().mime_type());
 }
 
 }

Userland/Services/Clipboard/ClientConnection.h

@@ -14,8 +14,7 @@
 namespace Clipboard {
 
 class ClientConnection final
-    : public IPC::ClientConnection<ClipboardClientEndpoint, ClipboardServerEndpoint>
+    : public IPC::ClientConnection<ClipboardClientEndpoint, ClipboardServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/ImageDecoder/ClientConnection.h

@@ -16,8 +16,7 @@
 namespace ImageDecoder {
 
 class ClientConnection final
-    : public IPC::ClientConnection<ImageDecoderClientEndpoint, ImageDecoderServerEndpoint>
+    : public IPC::ClientConnection<ImageDecoderClientEndpoint, ImageDecoderServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/LaunchServer/ClientConnection.h

@@ -12,8 +12,7 @@
 
 namespace LaunchServer {
 
-class ClientConnection final : public IPC::ClientConnection<LaunchClientEndpoint, LaunchServerEndpoint>
+class ClientConnection final : public IPC::ClientConnection<LaunchClientEndpoint, LaunchServerEndpoint> {
-{
     C_OBJECT(ClientConnection)
 public:
     ~ClientConnection() override;

Userland/Services/LookupServer/ClientConnection.h

@@ -14,8 +14,7 @@
 namespace LookupServer {
 
 class ClientConnection final
-    : public IPC::ClientConnection<LookupClientEndpoint, LookupServerEndpoint>
+    : public IPC::ClientConnection<LookupClientEndpoint, LookupServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/NotificationServer/ClientConnection.h

@@ -12,8 +12,7 @@
 
 namespace NotificationServer {
 
-class ClientConnection final : public IPC::ClientConnection<NotificationClientEndpoint, NotificationServerEndpoint>
+class ClientConnection final : public IPC::ClientConnection<NotificationClientEndpoint, NotificationServerEndpoint> {
-{
     C_OBJECT(ClientConnection)
 public:
     ~ClientConnection() override;

Userland/Services/RequestServer/ClientConnection.cpp

@@ -77,26 +77,26 @@ void ClientConnection::did_receive_headers(Badge<Request>, Request& request)
     for (auto& it : request.response_headers())
         response_headers.add(it.key, it.value);
 
-    post_message(Messages::RequestClient::HeadersBecameAvailable(request.id(), move(response_headers), request.status_code()));
+    async_headers_became_available(request.id(), move(response_headers), request.status_code());
 }
 
 void ClientConnection::did_finish_request(Badge<Request>, Request& request, bool success)
 {
     VERIFY(request.total_size().has_value());
 
-    post_message(Messages::RequestClient::RequestFinished(request.id(), success, request.total_size().value()));
+    async_request_finished(request.id(), success, request.total_size().value());
 
     m_requests.remove(request.id());
 }
 
 void ClientConnection::did_progress_request(Badge<Request>, Request& request)
 {
-    post_message(Messages::RequestClient::RequestProgress(request.id(), request.total_size(), request.downloaded_size()));
+    async_request_progress(request.id(), request.total_size(), request.downloaded_size());
 }
 
 void ClientConnection::did_request_certificates(Badge<Request>, Request& request)
 {
-    post_message(Messages::RequestClient::CertificateRequested(request.id()));
+    async_certificate_requested(request.id());
 }
 
 void ClientConnection::greet()

Userland/Services/RequestServer/ClientConnection.h

@@ -15,8 +15,7 @@
 namespace RequestServer {
 
 class ClientConnection final
-    : public IPC::ClientConnection<RequestClientEndpoint, RequestServerEndpoint>
+    : public IPC::ClientConnection<RequestClientEndpoint, RequestServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/SymbolServer/ClientConnection.h

@@ -16,8 +16,7 @@
 namespace SymbolServer {
 
 class ClientConnection final
-    : public IPC::ClientConnection<SymbolClientEndpoint, SymbolServerEndpoint>
+    : public IPC::ClientConnection<SymbolClientEndpoint, SymbolServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/Taskbar/TaskbarButton.cpp

@@ -26,29 +26,26 @@ TaskbarButton::~TaskbarButton()
 
 void TaskbarButton::context_menu_event(GUI::ContextMenuEvent&)
 {
-    GUI::WindowManagerServerConnection::the().post_message(
+    GUI::WindowManagerServerConnection::the().async_popup_window_menu(
-        Messages::WindowManagerServer::PopupWindowMenu(
+        m_identifier.client_id(),
-            m_identifier.client_id(),
+        m_identifier.window_id(),
-            m_identifier.window_id(),
+        screen_relative_rect().location());
-            screen_relative_rect().location()));
 }
 
 void TaskbarButton::update_taskbar_rect()
 {
-    GUI::WindowManagerServerConnection::the().post_message(
+    GUI::WindowManagerServerConnection::the().async_set_window_taskbar_rect(
-        Messages::WindowManagerServer::SetWindowTaskbarRect(
+        m_identifier.client_id(),
-            m_identifier.client_id(),
+        m_identifier.window_id(),
-            m_identifier.window_id(),
+        screen_relative_rect());
-            screen_relative_rect()));
 }
 
 void TaskbarButton::clear_taskbar_rect()
 {
-    GUI::WindowManagerServerConnection::the().post_message(
+    GUI::WindowManagerServerConnection::the().async_set_window_taskbar_rect(
-        Messages::WindowManagerServer::SetWindowTaskbarRect(
+        m_identifier.client_id(),
-            m_identifier.client_id(),
+        m_identifier.window_id(),
-            m_identifier.window_id(),
+        {});
-            {}));
 }
 
 void TaskbarButton::resize_event(GUI::ResizeEvent& event)

Userland/Services/Taskbar/TaskbarWindow.cpp

@@ -164,7 +164,7 @@ void TaskbarWindow::update_applet_area()
     main_widget()->do_layout();
     Gfx::IntRect new_rect { {}, m_applet_area_size };
     new_rect.center_within(m_applet_area_container->screen_relative_rect());
-    GUI::WindowManagerServerConnection::the().send_sync<Messages::WindowManagerServer::SetAppletAreaPosition>(new_rect.location());
+    GUI::WindowManagerServerConnection::the().set_applet_area_position(new_rect.location());
 }
 
 NonnullRefPtr<GUI::Button> TaskbarWindow::create_button(const WindowIdentifier& identifier)
@@ -191,9 +191,9 @@ void TaskbarWindow::add_window_button(::Window& window, const WindowIdentifier&
         // false because window is the modal window's owner (which is not
         // active)
         if (window->is_minimized() || !button->is_checked()) {
-            GUI::WindowManagerServerConnection::the().post_message(Messages::WindowManagerServer::SetActiveWindow(identifier.client_id(), identifier.window_id()));
+            GUI::WindowManagerServerConnection::the().async_set_active_window(identifier.client_id(), identifier.window_id());
         } else {
-            GUI::WindowManagerServerConnection::the().post_message(Messages::WindowManagerServer::SetWindowMinimized(identifier.client_id(), identifier.window_id(), true));
+            GUI::WindowManagerServerConnection::the().async_set_window_minimized(identifier.client_id(), identifier.window_id(), true);
         }
     };
 }

Userland/Services/Taskbar/main.cpp

@@ -178,7 +178,7 @@ NonnullRefPtr<GUI::Menu> build_system_menu()
         quick_sort(g_themes, [](auto& a, auto& b) { return a.name < b.name; });
     }
 
-    auto current_theme_name = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::GetSystemTheme>()->theme_name();
+    auto current_theme_name = GUI::WindowServerConnection::the().get_system_theme().theme_name();
 
     {
         int theme_identifier = 0;
@@ -186,8 +186,8 @@ NonnullRefPtr<GUI::Menu> build_system_menu()
             auto action = GUI::Action::create_checkable(theme.name, [theme_identifier](auto&) {
                 auto& theme = g_themes[theme_identifier];
                 dbgln("Theme switched to {} at path {}", theme.name, theme.path);
-                auto response = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetSystemTheme>(theme.path, theme.name);
+                auto response = GUI::WindowServerConnection::the().set_system_theme(theme.path, theme.name);
-                VERIFY(response->success());
+                VERIFY(response.success());
             });
             if (theme.name == current_theme_name)
                 action->set_checked(true);

Userland/Services/WebContent/ClientConnection.cpp

@@ -135,7 +135,7 @@ void ClientConnection::flush_pending_paint_requests()
 {
     for (auto& pending_paint : m_pending_paint_requests) {
         m_page_host->paint(pending_paint.content_rect, *pending_paint.bitmap);
-        post_message(Messages::WebContentClient::DidPaint(pending_paint.content_rect, pending_paint.bitmap_id));
+        async_did_paint(pending_paint.content_rect, pending_paint.bitmap_id);
     }
     m_pending_paint_requests.clear();
 }
@@ -209,7 +209,7 @@ void ClientConnection::debug_request(const String& request, const String& argume
 void ClientConnection::get_source()
 {
     if (auto* doc = page().main_frame().document()) {
-        post_message(Messages::WebContentClient::DidGetSource(doc->url(), doc->source()));
+        async_did_get_source(doc->url(), doc->source());
     }
 }
 

Userland/Services/WebContent/ClientConnection.h

@@ -19,8 +19,7 @@
 namespace WebContent {
 
 class ClientConnection final
-    : public IPC::ClientConnection<WebContentClientEndpoint, WebContentServerEndpoint>
+    : public IPC::ClientConnection<WebContentClientEndpoint, WebContentServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/WebContent/PageHost.cpp

@@ -78,17 +78,17 @@ void PageHost::set_viewport_rect(const Gfx::IntRect& rect)
 
 void PageHost::page_did_invalidate(const Gfx::IntRect& content_rect)
 {
-    m_client.post_message(Messages::WebContentClient::DidInvalidateContentRect(content_rect));
+    m_client.async_did_invalidate_content_rect(content_rect);
 }
 
 void PageHost::page_did_change_selection()
 {
-    m_client.post_message(Messages::WebContentClient::DidChangeSelection());
+    m_client.async_did_change_selection();
 }
 
 void PageHost::page_did_request_cursor_change(Gfx::StandardCursor cursor)
 {
-    m_client.post_message(Messages::WebContentClient::DidRequestCursorChange((u32)cursor));
+    m_client.async_did_request_cursor_change((u32)cursor);
 }
 
 void PageHost::page_did_layout()
@@ -96,107 +96,107 @@ void PageHost::page_did_layout()
     auto* layout_root = this->layout_root();
     VERIFY(layout_root);
     auto content_size = enclosing_int_rect(layout_root->absolute_rect()).size();
-    m_client.post_message(Messages::WebContentClient::DidLayout(content_size));
+    m_client.async_did_layout(content_size);
 }
 
 void PageHost::page_did_change_title(const String& title)
 {
-    m_client.post_message(Messages::WebContentClient::DidChangeTitle(title));
+    m_client.async_did_change_title(title);
 }
 
 void PageHost::page_did_request_scroll(int wheel_delta)
 {
-    m_client.post_message(Messages::WebContentClient::DidRequestScroll(wheel_delta));
+    m_client.async_did_request_scroll(wheel_delta);
 }
 
 void PageHost::page_did_request_scroll_into_view(const Gfx::IntRect& rect)
 {
-    m_client.post_message(Messages::WebContentClient::DidRequestScrollIntoView(rect));
+    m_client.async_did_request_scroll_into_view(rect);
 }
 
 void PageHost::page_did_enter_tooltip_area(const Gfx::IntPoint& content_position, const String& title)
 {
-    m_client.post_message(Messages::WebContentClient::DidEnterTooltipArea(content_position, title));
+    m_client.async_did_enter_tooltip_area(content_position, title);
 }
 
 void PageHost::page_did_leave_tooltip_area()
 {
-    m_client.post_message(Messages::WebContentClient::DidLeaveTooltipArea());
+    m_client.async_did_leave_tooltip_area();
 }
 
 void PageHost::page_did_hover_link(const URL& url)
 {
-    m_client.post_message(Messages::WebContentClient::DidHoverLink(url));
+    m_client.async_did_hover_link(url);
 }
 
 void PageHost::page_did_unhover_link()
 {
-    m_client.post_message(Messages::WebContentClient::DidUnhoverLink());
+    m_client.async_did_unhover_link();
 }
 
 void PageHost::page_did_click_link(const URL& url, const String& target, unsigned modifiers)
 {
-    m_client.post_message(Messages::WebContentClient::DidClickLink(url, target, modifiers));
+    m_client.async_did_click_link(url, target, modifiers);
 }
 
 void PageHost::page_did_middle_click_link(const URL& url, [[maybe_unused]] const String& target, [[maybe_unused]] unsigned modifiers)
 {
-    m_client.post_message(Messages::WebContentClient::DidMiddleClickLink(url, target, modifiers));
+    m_client.async_did_middle_click_link(url, target, modifiers);
 }
 
 void PageHost::page_did_start_loading(const URL& url)
 {
-    m_client.post_message(Messages::WebContentClient::DidStartLoading(url));
+    m_client.async_did_start_loading(url);
 }
 
 void PageHost::page_did_finish_loading(const URL& url)
 {
-    m_client.post_message(Messages::WebContentClient::DidFinishLoading(url));
+    m_client.async_did_finish_loading(url);
 }
 
 void PageHost::page_did_request_context_menu(const Gfx::IntPoint& content_position)
 {
-    m_client.post_message(Messages::WebContentClient::DidRequestContextMenu(content_position));
+    m_client.async_did_request_context_menu(content_position);
 }
 
 void PageHost::page_did_request_link_context_menu(const Gfx::IntPoint& content_position, const URL& url, const String& target, unsigned modifiers)
 {
-    m_client.post_message(Messages::WebContentClient::DidRequestLinkContextMenu(content_position, url, target, modifiers));
+    m_client.async_did_request_link_context_menu(content_position, url, target, modifiers);
 }
 
 void PageHost::page_did_request_alert(const String& message)
 {
-    m_client.send_sync<Messages::WebContentClient::DidRequestAlert>(message);
+    m_client.did_request_alert(message);
 }
 
 bool PageHost::page_did_request_confirm(const String& message)
 {
-    return m_client.send_sync<Messages::WebContentClient::DidRequestConfirm>(message)->result();
+    return m_client.did_request_confirm(message).result();
 }
 
 String PageHost::page_did_request_prompt(const String& message, const String& default_)
 {
-    return m_client.send_sync<Messages::WebContentClient::DidRequestPrompt>(message, default_)->response();
+    return m_client.did_request_prompt(message, default_).response();
 }
 
 void PageHost::page_did_change_favicon(const Gfx::Bitmap& favicon)
 {
-    m_client.post_message(Messages::WebContentClient::DidChangeFavicon(favicon.to_shareable_bitmap()));
+    m_client.async_did_change_favicon(favicon.to_shareable_bitmap());
 }
 
 void PageHost::page_did_request_image_context_menu(const Gfx::IntPoint& content_position, const URL& url, const String& target, unsigned modifiers, const Gfx::Bitmap* bitmap)
 {
-    m_client.post_message(Messages::WebContentClient::DidRequestImageContextMenu(content_position, url, target, modifiers, bitmap->to_shareable_bitmap()));
+    m_client.async_did_request_image_context_menu(content_position, url, target, modifiers, bitmap->to_shareable_bitmap());
 }
 
 String PageHost::page_did_request_cookie(const URL& url, Web::Cookie::Source source)
 {
-    return m_client.send_sync<Messages::WebContentClient::DidRequestCookie>(url, static_cast<u8>(source))->cookie();
+    return m_client.did_request_cookie(url, static_cast<u8>(source)).cookie();
 }
 
 void PageHost::page_did_set_cookie(const URL& url, const Web::Cookie::ParsedCookie& cookie, Web::Cookie::Source source)
 {
-    m_client.post_message(Messages::WebContentClient::DidSetCookie(url, cookie, static_cast<u8>(source)));
+    m_client.async_did_set_cookie(url, cookie, static_cast<u8>(source));
 }
 
 }

Userland/Services/WebContent/WebContentConsoleClient.cpp

@@ -51,12 +51,12 @@ void WebContentConsoleClient::handle_input(const String& js_source)
 
 void WebContentConsoleClient::print_html(const String& line)
 {
-    m_client.post_message(Messages::WebContentClient::DidJSConsoleOutput("html", line));
+    m_client.async_did_jsconsole_output("html", line);
 }
 
 void WebContentConsoleClient::clear_output()
 {
-    m_client.post_message(Messages::WebContentClient::DidJSConsoleOutput("clear_output", {}));
+    m_client.async_did_jsconsole_output("clear_output", {});
 }
 
 JS::Value WebContentConsoleClient::log()

Userland/Services/WebSocket/ClientConnection.cpp

@@ -115,22 +115,22 @@ Messages::WebSocketServer::SetCertificateResponse ClientConnection::set_certific
 
 void ClientConnection::did_connect(i32 connection_id)
 {
-    post_message(Messages::WebSocketClient::Connected(connection_id));
+    async_connected(connection_id);
 }
 
 void ClientConnection::did_receive_message(i32 connection_id, Message message)
 {
-    post_message(Messages::WebSocketClient::Received(connection_id, message.is_text(), message.data()));
+    async_received(connection_id, message.is_text(), message.data());
 }
 
 void ClientConnection::did_error(i32 connection_id, i32 message)
 {
-    post_message(Messages::WebSocketClient::Errored(connection_id, message));
+    async_errored(connection_id, message);
 }
 
 void ClientConnection::did_close(i32 connection_id, u16 code, String reason, bool was_clean)
 {
-    post_message(Messages::WebSocketClient::Closed(connection_id, code, reason, was_clean));
+    async_closed(connection_id, code, reason, was_clean);
     deferred_invoke([this, connection_id] {
         m_connections.remove(connection_id);
     });
@@ -138,7 +138,7 @@ void ClientConnection::did_close(i32 connection_id, u16 code, String reason, boo
 
 void ClientConnection::did_request_certificates(i32 connection_id)
 {
-    post_message(Messages::WebSocketClient::CertificateRequested(connection_id));
+    async_certificate_requested(connection_id);
 }
 
 }

Userland/Services/WebSocket/ClientConnection.h

@@ -15,8 +15,7 @@
 namespace WebSocket {
 
 class ClientConnection final
-    : public IPC::ClientConnection<WebSocketClientEndpoint, WebSocketServerEndpoint>
+    : public IPC::ClientConnection<WebSocketClientEndpoint, WebSocketServerEndpoint> {
-{
     C_OBJECT(ClientConnection);
 
 public:

Userland/Services/WindowServer/ClientConnection.cpp

@@ -78,7 +78,7 @@ void ClientConnection::die()
 
 void ClientConnection::notify_about_new_screen_rect(Gfx::IntRect const& rect)
 {
-    post_message(Messages::WindowClient::ScreenRectChanged(rect));
+    async_screen_rect_changed(rect);
 }
 
 Messages::WindowServer::CreateMenubarResponse ClientConnection::create_menubar()
@@ -278,10 +278,10 @@ void ClientConnection::set_window_opacity(i32 window_id, float opacity)
     it->value->set_opacity(opacity);
 }
 
-void ClientConnection::async_set_wallpaper(String const& path)
+void ClientConnection::set_wallpaper(String const& path)
 {
     Compositor::the().set_wallpaper(path, [&](bool success) {
-        post_message(Messages::WindowClient::AsyncSetWallpaperFinished(success));
+        async_set_wallpaper_finished(success);
     });
 }
 
@@ -544,7 +544,7 @@ void ClientConnection::post_paint_message(Window& window, bool ignore_occlusion)
     if (window.is_minimized() || (!ignore_occlusion && window.is_occluded()))
         return;
 
-    post_message(Messages::WindowClient::Paint(window.window_id(), window.size(), rect_set.rects()));
+    async_paint(window.window_id(), window.size(), rect_set.rects());
 }
 
 void ClientConnection::invalidate_rect(i32 window_id, Vector<Gfx::IntRect> const& rects, bool ignore_occlusion)
@@ -755,7 +755,7 @@ void ClientConnection::notify_display_link(Badge<Compositor>)
     if (!m_has_display_link)
         return;
 
-    post_message(Messages::WindowClient::DisplayLinkNotification());
+    async_display_link_notification();
 }
 
 void ClientConnection::set_window_progress(i32 window_id, Optional<i32> const& progress)
@@ -771,7 +771,7 @@ void ClientConnection::set_window_progress(i32 window_id, Optional<i32> const& p
 void ClientConnection::refresh_system_theme()
 {
     // Post the client an UpdateSystemTheme message to refresh its theme.
-    post_message(Messages::WindowClient::UpdateSystemTheme(Gfx::current_system_theme_buffer()));
+    async_update_system_theme(Gfx::current_system_theme_buffer());
 }
 
 void ClientConnection::pong()
@@ -847,7 +847,7 @@ void ClientConnection::set_unresponsive(bool unresponsive)
 
 void ClientConnection::may_have_become_unresponsive()
 {
-    post_message(Messages::WindowClient::Ping());
+    async_ping();
     m_ping_timer = Core::Timer::create_single_shot(1000, [this] {
         set_unresponsive(true);
     });

Userland/Services/WindowServer/ClientConnection.h

@@ -28,8 +28,7 @@ class Menubar;
 class WMClientConnection;
 
 class ClientConnection final
-    : public IPC::ClientConnection<WindowClientEndpoint, WindowServerEndpoint>
+    : public IPC::ClientConnection<WindowClientEndpoint, WindowServerEndpoint> {
-{
     C_OBJECT(ClientConnection)
 public:
     ~ClientConnection() override;
@@ -120,7 +119,7 @@ private:
     virtual void move_window_to_front(i32) override;
     virtual void set_fullscreen(i32, bool) override;
     virtual void set_frameless(i32, bool) override;
-    virtual void async_set_wallpaper(String const&) override;
+    virtual void set_wallpaper(String const&) override;
     virtual void set_background_color(String const&) override;
     virtual void set_wallpaper_mode(String const&) override;
     virtual Messages::WindowServer::GetWallpaperResponse get_wallpaper() override;

Userland/Services/WindowServer/Menu.cpp

@@ -507,7 +507,7 @@ void Menu::did_activate(MenuItem& item, bool leave_menu_open)
         MenuManager::the().close_everyone();
 
     if (m_client)
-        m_client->post_message(Messages::WindowClient::MenuItemActivated(m_menu_id, item.identifier()));
+        m_client->async_menu_item_activated(m_menu_id, item.identifier());
 }
 
 bool Menu::activate_default()
@@ -612,7 +612,7 @@ void Menu::set_visible(bool visible)
         return;
     menu_window()->set_visible(visible);
     if (m_client)
-        m_client->post_message(Messages::WindowClient::MenuVisibilityDidChange(m_menu_id, visible));
+        m_client->async_menu_visibility_did_change(m_menu_id, visible);
 }
 
 void Menu::add_item(NonnullOwnPtr<MenuItem> item)
@@ -637,13 +637,13 @@ void Menu::set_hovered_index(int index, bool make_input)
         return;
     if (auto* old_hovered_item = hovered_item()) {
         if (client())
-            client()->post_message(Messages::WindowClient::MenuItemLeft(m_menu_id, old_hovered_item->identifier()));
+            client()->async_menu_item_left(m_menu_id, old_hovered_item->identifier());
     }
     m_hovered_item_index = index;
     update_for_new_hovered_item(make_input);
     if (auto* new_hovered_item = hovered_item()) {
         if (client())
-            client()->post_message(Messages::WindowClient::MenuItemEntered(m_menu_id, new_hovered_item->identifier()));
+            client()->async_menu_item_entered(m_menu_id, new_hovered_item->identifier());
     }
 }
 

Userland/Services/WindowServer/WMClientConnection.h

@@ -15,8 +15,7 @@
 namespace WindowServer {
 
 class WMClientConnection final
-    : public IPC::ClientConnection<WindowManagerClientEndpoint, WindowManagerServerEndpoint>
+    : public IPC::ClientConnection<WindowManagerClientEndpoint, WindowManagerServerEndpoint> {
-{
     C_OBJECT(WMClientConnection)
 
 public:

Userland/Services/WindowServer/Window.cpp

@@ -226,19 +226,19 @@ void Window::handle_mouse_event(const MouseEvent& event)
 
     switch (event.type()) {
     case Event::MouseMove:
-        m_client->post_message(Messages::WindowClient::MouseMove(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta(), event.is_drag(), event.mime_types()));
+        m_client->async_mouse_move(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta(), event.is_drag(), event.mime_types());
         break;
     case Event::MouseDown:
-        m_client->post_message(Messages::WindowClient::MouseDown(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        m_client->async_mouse_down(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta());
         break;
     case Event::MouseDoubleClick:
-        m_client->post_message(Messages::WindowClient::MouseDoubleClick(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        m_client->async_mouse_double_click(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta());
         break;
     case Event::MouseUp:
-        m_client->post_message(Messages::WindowClient::MouseUp(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        m_client->async_mouse_up(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta());
         break;
     case Event::MouseWheel:
-        m_client->post_message(Messages::WindowClient::MouseWheel(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta()));
+        m_client->async_mouse_wheel(m_window_id, event.position(), (u32)event.button(), event.buttons(), event.modifiers(), event.wheel_delta());
         break;
     default:
         VERIFY_NOT_REACHED();
@@ -414,39 +414,38 @@ void Window::event(Core::Event& event)
 
     switch (event.type()) {
     case Event::WindowEntered:
-        m_client->post_message(Messages::WindowClient::WindowEntered(m_window_id));
+        m_client->async_window_entered(m_window_id);
         break;
     case Event::WindowLeft:
-        m_client->post_message(Messages::WindowClient::WindowLeft(m_window_id));
+        m_client->async_window_left(m_window_id);
         break;
     case Event::KeyDown:
         handle_keydown_event(static_cast<const KeyEvent&>(event));
         break;
     case Event::KeyUp:
-        m_client->post_message(
+        m_client->async_key_up(m_window_id,
-            Messages::WindowClient::KeyUp(m_window_id,
+            (u32) static_cast<const KeyEvent&>(event).code_point(),
-                (u32) static_cast<const KeyEvent&>(event).code_point(),
+            (u32) static_cast<const KeyEvent&>(event).key(),
-                (u32) static_cast<const KeyEvent&>(event).key(),
+            static_cast<const KeyEvent&>(event).modifiers(),
-                static_cast<const KeyEvent&>(event).modifiers(),
+            (u32) static_cast<const KeyEvent&>(event).scancode());
-                (u32) static_cast<const KeyEvent&>(event).scancode()));
         break;
     case Event::WindowActivated:
-        m_client->post_message(Messages::WindowClient::WindowActivated(m_window_id));
+        m_client->async_window_activated(m_window_id);
         break;
     case Event::WindowDeactivated:
-        m_client->post_message(Messages::WindowClient::WindowDeactivated(m_window_id));
+        m_client->async_window_deactivated(m_window_id);
         break;
     case Event::WindowInputEntered:
-        m_client->post_message(Messages::WindowClient::WindowInputEntered(m_window_id));
+        m_client->async_window_input_entered(m_window_id);
         break;
     case Event::WindowInputLeft:
-        m_client->post_message(Messages::WindowClient::WindowInputLeft(m_window_id));
+        m_client->async_window_input_left(m_window_id);
         break;
     case Event::WindowCloseRequest:
-        m_client->post_message(Messages::WindowClient::WindowCloseRequest(m_window_id));
+        m_client->async_window_close_request(m_window_id);
         break;
     case Event::WindowResized:
-        m_client->post_message(Messages::WindowClient::WindowResized(m_window_id, static_cast<const ResizeEvent&>(event).rect()));
+        m_client->async_window_resized(m_window_id, static_cast<const ResizeEvent&>(event).rect());
         break;
     default:
         break;
@@ -471,7 +470,7 @@ void Window::handle_keydown_event(const KeyEvent& event)
             return;
         }
     }
-    m_client->post_message(Messages::WindowClient::KeyDown(m_window_id, (u32)event.code_point(), (u32)event.key(), event.modifiers(), (u32)event.scancode()));
+    m_client->async_key_down(m_window_id, (u32)event.code_point(), (u32)event.key(), event.modifiers(), (u32)event.scancode());
 }
 
 void Window::set_global_cursor_tracking_enabled(bool enabled)
@@ -556,7 +555,7 @@ bool Window::invalidate_no_notify(const Gfx::IntRect& rect, bool with_frame)
 
 void Window::refresh_client_size()
 {
-    client()->post_message(Messages::WindowClient::WindowResized(m_window_id, m_rect));
+    client()->async_window_resized(m_window_id, m_rect);
 }
 
 void Window::prepare_dirty_rects()

Userland/Services/WindowServer/WindowClient.ipc

@@ -25,7 +25,7 @@ endpoint WindowClient
 
     ScreenRectChanged(Gfx::IntRect rect) =|
 
-    AsyncSetWallpaperFinished(bool success) =|
+    SetWallpaperFinished(bool success) =|
 
     DragAccepted() =|
     DragCancelled() =|

Userland/Services/WindowServer/WindowManager.cpp

@@ -269,7 +269,7 @@ void WindowManager::remove_window(Window& window)
         if (conn.window_id() < 0 || !(conn.event_mask() & WMEventMask::WindowRemovals))
             return IterationDecision::Continue;
         if (!window.is_internal() && !window.is_modal())
-            conn.post_message(Messages::WindowManagerClient::WindowRemoved(conn.window_id(), window.client_id(), window.window_id()));
+            conn.async_window_removed(conn.window_id(), window.client_id(), window.window_id());
         return IterationDecision::Continue;
     });
 }
@@ -299,7 +299,7 @@ void WindowManager::tell_wm_about_window(WMClientConnection& conn, Window& windo
     if (window.is_internal())
         return;
     auto* parent = window.parent_window();
-    conn.post_message(Messages::WindowManagerClient::WindowStateChanged(conn.window_id(), window.client_id(), window.window_id(), parent ? parent->client_id() : -1, parent ? parent->window_id() : -1, window.is_active(), window.is_minimized(), window.is_modal_dont_unparent(), window.is_frameless(), (i32)window.type(), window.title(), window.rect(), window.progress()));
+    conn.async_window_state_changed(conn.window_id(), window.client_id(), window.window_id(), parent ? parent->client_id() : -1, parent ? parent->window_id() : -1, window.is_active(), window.is_minimized(), window.is_modal_dont_unparent(), window.is_frameless(), (i32)window.type(), window.title(), window.rect(), window.progress());
 }
 
 void WindowManager::tell_wm_about_window_rect(WMClientConnection& conn, Window& window)
@@ -310,7 +310,7 @@ void WindowManager::tell_wm_about_window_rect(WMClientConnection& conn, Window&
         return;
     if (window.is_internal())
         return;
-    conn.post_message(Messages::WindowManagerClient::WindowRectChanged(conn.window_id(), window.client_id(), window.window_id(), window.rect()));
+    conn.async_window_rect_changed(conn.window_id(), window.client_id(), window.window_id(), window.rect());
 }
 
 void WindowManager::tell_wm_about_window_icon(WMClientConnection& conn, Window& window)
@@ -321,7 +321,7 @@ void WindowManager::tell_wm_about_window_icon(WMClientConnection& conn, Window&
         return;
     if (window.is_internal())
         return;
-    conn.post_message(Messages::WindowManagerClient::WindowIconBitmapChanged(conn.window_id(), window.client_id(), window.window_id(), window.icon().to_shareable_bitmap()));
+    conn.async_window_icon_bitmap_changed(conn.window_id(), window.client_id(), window.window_id(), window.icon().to_shareable_bitmap());
 }
 
 void WindowManager::tell_wms_window_state_changed(Window& window)
@@ -354,7 +354,7 @@ void WindowManager::tell_wms_applet_area_size_changed(const Gfx::IntSize& size)
         if (conn.window_id() < 0)
             return IterationDecision::Continue;
 
-        conn.post_message(Messages::WindowManagerClient::AppletAreaSizeChanged(conn.window_id(), size));
+        conn.async_applet_area_size_changed(conn.window_id(), size);
         return IterationDecision::Continue;
     });
 }
@@ -365,7 +365,7 @@ void WindowManager::tell_wms_super_key_pressed()
         if (conn.window_id() < 0)
             return IterationDecision::Continue;
 
-        conn.post_message(Messages::WindowManagerClient::SuperKeyPressed(conn.window_id()));
+        conn.async_super_key_pressed(conn.window_id());
         return IterationDecision::Continue;
     });
 }
@@ -427,7 +427,7 @@ void WindowManager::notify_minimization_state_changed(Window& window)
     tell_wms_window_state_changed(window);
 
     if (window.client())
-        window.client()->post_message(Messages::WindowClient::WindowStateChanged(window.window_id(), window.is_minimized(), window.is_occluded()));
+        window.client()->async_window_state_changed(window.window_id(), window.is_minimized(), window.is_occluded());
 
     if (window.is_active() && window.is_minimized())
         pick_new_active_window(&window);
@@ -436,7 +436,7 @@ void WindowManager::notify_minimization_state_changed(Window& window)
 void WindowManager::notify_occlusion_state_changed(Window& window)
 {
     if (window.client())
-        window.client()->post_message(Messages::WindowClient::WindowStateChanged(window.window_id(), window.is_minimized(), window.is_occluded()));
+        window.client()->async_window_state_changed(window.window_id(), window.is_minimized(), window.is_occluded());
 }
 
 void WindowManager::notify_progress_changed(Window& window)
@@ -769,13 +769,13 @@ bool WindowManager::process_ongoing_drag(MouseEvent& event, Window*& hovered_win
     });
 
     if (hovered_window) {
-        m_dnd_client->post_message(Messages::WindowClient::DragAccepted());
+        m_dnd_client->async_drag_accepted();
         if (hovered_window->client()) {
             auto translated_event = event.translated(-hovered_window->position());
-            hovered_window->client()->post_message(Messages::WindowClient::DragDropped(hovered_window->window_id(), translated_event.position(), m_dnd_text, m_dnd_mime_data->all_data()));
+            hovered_window->client()->async_drag_dropped(hovered_window->window_id(), translated_event.position(), m_dnd_text, m_dnd_mime_data->all_data());
         }
     } else {
-        m_dnd_client->post_message(Messages::WindowClient::DragCancelled());
+        m_dnd_client->async_drag_cancelled();
     }
 
     end_dnd_drag();
@@ -1190,11 +1190,11 @@ void WindowManager::event(Core::Event& event)
         // Escape key cancels an ongoing drag.
         if (key_event.type() == Event::KeyDown && key_event.key() == Key_Escape && m_dnd_client) {
             // Notify the drag-n-drop client that the drag was cancelled.
-            m_dnd_client->post_message(Messages::WindowClient::DragCancelled());
+            m_dnd_client->async_drag_cancelled();
 
             // Also notify the currently hovered window (if any) that the ongoing drag was cancelled.
             if (m_hovered_window && m_hovered_window->client() && m_hovered_window->client() != m_dnd_client)
-                m_hovered_window->client()->post_message(Messages::WindowClient::DragCancelled());
+                m_hovered_window->client()->async_drag_cancelled();
 
             end_dnd_drag();
             return;
@@ -1538,7 +1538,7 @@ bool WindowManager::update_theme(String theme_path, String theme_name)
     for_each_window([&](Window& window) {
         if (window.client()) {
             if (!notified_clients.contains(window.client())) {
-                window.client()->post_message(Messages::WindowClient::UpdateSystemTheme(Gfx::current_system_theme_buffer()));
+                window.client()->async_update_system_theme(Gfx::current_system_theme_buffer());
                 notified_clients.set(window.client());
             }
         }

Userland/Services/WindowServer/WindowServer.ipc

@@ -88,7 +88,7 @@ endpoint WindowServer
     PopupMenu(i32 menu_id, Gfx::IntPoint screen_position) => ()
     DismissMenu(i32 menu_id) => ()
 
-    AsyncSetWallpaper(String path) =|
+    SetWallpaper(String path) =|
 
     SetBackgroundColor(String background_color)  => ()
     SetWallpaperMode(String mode)  => ()

Userland/Utilities/chres.cpp

@@ -24,8 +24,8 @@ int main(int argc, char** argv)
     // A Core::EventLoop is all we need, but WindowServerConnection needs a full Application object.
     char* dummy_argv[] = { argv[0] };
     auto app = GUI::Application::construct(1, dummy_argv);
-    auto result = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::SetResolution>(Gfx::IntSize { width, height }, scale);
+    auto result = GUI::WindowServerConnection::the().set_resolution(Gfx::IntSize { width, height }, scale);
-    if (!result->success()) {
+    if (!result.success()) {
         warnln("failed to set resolution");
         return 1;
     }

Userland/Utilities/shot.cpp

@@ -34,9 +34,9 @@ int main(int argc, char** argv)
 
     auto app = GUI::Application::construct(argc, argv);
     sleep(delay);
-    auto response = GUI::WindowServerConnection::the().send_sync<Messages::WindowServer::GetScreenBitmap>();
+    auto response = GUI::WindowServerConnection::the().get_screen_bitmap();
 
-    auto* bitmap = response->bitmap().bitmap();
+    auto* bitmap = response.bitmap().bitmap();
     if (!bitmap) {
         warnln("Failed to grab screenshot");
         return 1;