apps/gclient.cpp

@@ -1,23 +1,5 @@
 #include <os/ArgumentParser.h>
-#include <os/File.h>
 #include <os/LocalClient.h>
-#include <ui/ipc/Server.h>
-#include <unistd.h>
-
-Result<void> handle_ipc_client_event(os::LocalClient&, u8)
-{
-    todo();
-}
-
-Result<int> create_window(os::LocalClient& client, ui::Rect rect, StringView name, ui::Color color)
-{
-    ui::CreateWindowRequest request;
-    request.rect = rect;
-    SET_IPC_STRING(request.name, name.chars());
-    request.color = color;
-    auto response = TRY(os::IPC::send_sync<ui::CreateWindowResponse>(client, request));
-    return response.window;
-}
 
 Result<int> luna_main(int argc, char** argv)
 {
@@ -31,16 +13,8 @@ Result<int> luna_main(int argc, char** argv)
 
     auto client = TRY(os::LocalClient::connect(socket_path, false));
 
-    int id = TRY(create_window(*client, ui::Rect { 200, 200, 400, 300 }, "My Window", ui::CYAN));
+    StringView message = "hello";
-    os::println("Created new window with id %d!", id);
+    TRY(client->send((const u8*)message.chars(), message.length()));
-
-    sleep(3);
-
-    id =
-        TRY(create_window(*client, ui::Rect { 100, 100, 200, 150 }, "Super Long Name that is Way Too Long ", ui::BLUE));
-    os::println("Created new window with id %d!", id);
-
-    sleep(6);
 
     return 0;
 }

kernel/src/net/Socket.h

@@ -69,8 +69,6 @@ class Socket : public VFS::FileInode
 
     virtual bool can_read_data() const = 0;
 
-    virtual bool peer_disconnected() const = 0;
-
     virtual ~Socket() = default;
 
   protected:

kernel/src/net/UnixSocket.h

@@ -27,11 +27,6 @@ class UnixSocket : public Socket
         return !m_listen_queue.is_empty();
     }
 
-    bool peer_disconnected() const override
-    {
-        return m_state == Reset;
-    }
-
     Result<usize> send(const u8*, usize, int) override;
     Result<usize> recv(u8*, usize, int) const override;
 

kernel/src/sys/poll.cpp

@@ -56,11 +56,6 @@ Result<u64> sys_poll(Registers*, SyscallArgs args)
                         fds_with_events++;
                         kfds[i].revents |= POLLIN;
                     }
-                    if (socket->peer_disconnected())
-                    {
-                        fds_with_events++;
-                        kfds[i].revents |= POLLHUP;
-                    }
                 }
                 else
                 {

libc/include/bits/poll.h

@@ -8,7 +8,6 @@
 #define POLLIN (1 << 0)
 #define POLLERR (1 << 1)
 #define POLLNVAL (1 << 2)
-#define POLLHUP (1 << 3)
 
 typedef __u64_t nfds_t;
 

libos/CMakeLists.txt

@@ -16,7 +16,6 @@ set(SOURCES
     src/Security.cpp
     src/LocalServer.cpp
     src/LocalClient.cpp
-    src/IPC.cpp
 )
 
 add_library(os ${SOURCES})

libos/include/os/IPC.h

@@ -1,157 +0,0 @@
-/**
- * @file IPC.h
- * @author apio (cloudapio.eu)
- * @brief Inter-process communication primitives.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
-#pragma once
-#include <os/LocalClient.h>
-#include <os/LocalServer.h>
-
-#define IPC_ENUM_SERVER(name) __##name##_SERVER_ERROR = 0
-#define IPC_ENUM_CLIENT(name) __##name##_CLIENT_ERROR = 0
-
-/**
- * @brief Called to handle IPC events (client-side).
- *
- * @param conn The connection object being used.
- * @param id The ID of the message.
- * @return Result<void> Whether the operation succeded.
- */
-extern Result<void> handle_ipc_client_event(os::LocalClient& conn, u8 id);
-
-/**
- * @brief Called to handle IPC events (server-side).
- *
- * @param conn The connection object being used.
- * @param id The ID of the message.
- * @return Result<void> Whether the operation succeded.
- */
-extern Result<void> handle_ipc_server_event(os::LocalServer::Client& conn, u8 id);
-
-namespace os
-{
-    namespace IPC
-    {
-        static constexpr usize IPC_STRING_LENGTH = 256;
-
-#define IPC_STRING(name) char name[os::IPC::IPC_STRING_LENGTH];
-#define COPY_IPC_STRING(name)                                                                                          \
-    TRY(String::from_string_view(StringView::from_fixed_size_cstring(name, os::IPC::IPC_STRING_LENGTH)))
-#define SET_IPC_STRING(name, value) strlcpy(name, value, os::IPC::IPC_STRING_LENGTH)
-
-        /**
-         * @brief Sends an IPC message without waiting for a reply.
-         *
-         * @tparam Client The type of the client interface being used to communicate.
-         * @tparam T The type of the message.
-         * @param client The connection object being used to communicate.
-         * @param message The IPC message.
-         * @return Result<void> Whether the operation succeded.
-         */
-        template <typename Client, typename T> Result<void> send_async(Client& client, const T& message)
-        {
-            u8 id = T::id;
-            TRY(client.send_typed(id));
-            TRY(client.send_typed(message));
-            return {};
-        }
-
-        /**
-         * @brief Sends an error result to the IPC connection, indicating that an operation could not be performed.
-         *
-         * @tparam Client The type of the client interface being used to communicate.
-         * @param client The connection object being used to communicate.
-         * @param error The error code.
-         * @return Result<void> Whether the operation succeded.
-         */
-        template <typename Client> Result<void> send_error(Client& client, int error)
-        {
-            u8 id = 0;
-            TRY(client.send_typed(id));
-            TRY(client.send_typed(error));
-            return {};
-        }
-
-        /**
-         * @brief Sends an IPC message and waits for a reply (client-only).
-         *
-         * @tparam ResponseType The type of the response.
-         * @tparam T The type of the message.
-         * @param client The connection object being used to communicate.
-         * @param message The IPC message.
-         * @param handler The function used to handle messages that do not match the reply.
-         * @return Result<ResponseType> An error, or the response.
-         */
-        template <typename ResponseType, typename T>
-        Result<ResponseType> send_sync(os::LocalClient& client, const T& message,
-                                       decltype(handle_ipc_client_event) handler = handle_ipc_client_event)
-        {
-            u8 id = T::id;
-            TRY(client.send_typed(id));
-            TRY(client.send_typed(message));
-
-            // We allow receiving 5 messages of different types, but if those have passed and we still don't have a
-            // reply, fail with ENOMSG.
-            int max_other_messages = 5;
-
-            while (max_other_messages)
-            {
-                u8 response_id;
-                auto rc = client.recv_typed(response_id);
-                if (rc.has_error() && rc.error() == EAGAIN) continue;
-
-                if (response_id == 0) // Error result
-                {
-                    while (1)
-                    {
-                        int code;
-                        rc = client.recv_typed(code);
-                        if (rc.has_error() && rc.error() == EAGAIN) continue;
-                        return err(code);
-                    }
-                }
-
-                if (response_id != ResponseType::id)
-                {
-                    TRY(handler(client, response_id));
-                    max_other_messages--;
-                    continue;
-                }
-
-                while (1)
-                {
-                    ResponseType response;
-                    rc = client.recv_typed(response);
-                    if (rc.has_error() && rc.error() == EAGAIN) continue;
-                    return response;
-                }
-            }
-
-            return err(ENOMSG);
-        }
-
-        /**
-         * @brief Check for new IPC messages on a connection and handle them appropriately.
-         *
-         * @param client The client connection.
-         * @param handler The function used to handle messages.
-         * @return Result<void> Whether the operation succeded.
-         */
-        Result<void> check_for_messages(os::LocalClient& client,
-                                        decltype(handle_ipc_client_event) handler = handle_ipc_client_event);
-
-        /**
-         * @brief Check for new IPC messages on a connection and handle them appropriately.
-         *
-         * @param server The server connection.
-         * @param handler The function used to handle messages.
-         * @return Result<void> Whether the operation succeded.
-         */
-        Result<void> check_for_messages(os::LocalServer::Client& server,
-                                        decltype(handle_ipc_server_event) handler = handle_ipc_server_event);
-    }
-}

libos/include/os/LocalClient.h

@@ -1,12 +1,3 @@
-/**
- * @file LocalClient.h
- * @author apio (cloudapio.eu)
- * @brief UNIX local domain client class.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <luna/OwnedPtr.h>
 #include <luna/StringView.h>

libos/include/os/LocalServer.h

@@ -1,12 +1,3 @@
-/**
- * @file LocalServer.h
- * @author apio (cloudapio.eu)
- * @brief UNIX local domain server class.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <luna/OwnedPtr.h>
 #include <luna/Result.h>

libos/src/IPC.cpp

@@ -1,39 +0,0 @@
-/**
- * @file IPC.cpp
- * @author apio (cloudapio.eu)
- * @brief Inter-process communication primitives.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
-#include <os/IPC.h>
-
-namespace os::IPC
-{
-    Result<void> check_for_messages(os::LocalClient& client, decltype(handle_ipc_client_event) handler)
-    {
-        u8 id;
-        auto rc = client.recv_typed(id);
-        if (rc.has_error())
-        {
-            if (rc.error() == EAGAIN) return {}; // No messages, and the caller does not want us to block.
-            return rc.release_error();
-        }
-
-        return handler(client, id);
-    }
-
-    Result<void> check_for_messages(os::LocalServer::Client& client, decltype(handle_ipc_server_event) handler)
-    {
-        u8 id;
-        auto rc = client.recv_typed(id);
-        if (rc.has_error())
-        {
-            if (rc.error() == EAGAIN) return {}; // No messages, and the caller does not want us to block.
-            return rc.release_error();
-        }
-
-        return handler(client, id);
-    }
-}

libos/src/LocalClient.cpp

@@ -1,12 +1,3 @@
-/**
- * @file LocalClient.cpp
- * @author apio (cloudapio.eu)
- * @brief UNIX local domain client class.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #include <errno.h>
 #include <fcntl.h>
 #include <os/LocalClient.h>

libos/src/LocalServer.cpp

@@ -1,12 +1,3 @@
-/**
- * @file LocalServer.cpp
- * @author apio (cloudapio.eu)
- * @brief UNIX local domain server class.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #include <errno.h>
 #include <fcntl.h>
 #include <os/FileSystem.h>

libui/CMakeLists.txt

@@ -4,8 +4,6 @@ file(GLOB HEADERS include/ui/*.h)
 
 set(SOURCES
     ${HEADERS}
-    include/ui/ipc/Server.h
-    include/ui/ipc/Client.h
     src/Canvas.cpp
     src/Rect.cpp
     src/Font.cpp

libui/include/ui/Canvas.h

@@ -1,12 +1,3 @@
-/**
- * @file Canvas.h
- * @author apio (cloudapio.eu)
- * @brief Drawable surfaces.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <luna/Result.h>
 #include <luna/Types.h>

libui/include/ui/Color.h

@@ -1,12 +1,3 @@
-/**
- * @file Color.h
- * @author apio (cloudapio.eu)
- * @brief RGBA colors.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <luna/Types.h>
 

libui/include/ui/Font.h

@@ -1,12 +1,3 @@
-/**
- * @file Font.h
- * @author apio (cloudapio.eu)
- * @brief PSF font loading and rendering.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <luna/Buffer.h>
 #include <luna/SharedPtr.h>

libui/include/ui/Image.h

@@ -1,12 +1,3 @@
-/**
- * @file Image.h
- * @author apio (cloudapio.eu)
- * @brief TGA image loading and rendering.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <luna/Buffer.h>
 #include <luna/SharedPtr.h>

libui/include/ui/Point.h

@@ -1,12 +1,3 @@
-/**
- * @file Point.h
- * @author apio (cloudapio.eu)
- * @brief 2D space points.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 
 namespace ui

libui/include/ui/Rect.h

@@ -1,12 +1,3 @@
-/**
- * @file Rect.h
- * @author apio (cloudapio.eu)
- * @brief A simple 2D rectangle representation.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #pragma once
 #include <ui/Point.h>
 

libui/include/ui/ipc/Client.h

@@ -1,27 +0,0 @@
-/**
- * @file ipc/Client.h
- * @author apio (cloudapio.eu)
- * @brief IPC message definitions for UI messages sent to the client.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
-#pragma once
-#include <os/IPC.h>
-
-namespace ui
-{
-    enum ClientMessages : u8
-    {
-        IPC_ENUM_CLIENT(ui),
-        CREATE_WINDOW_RESPONSE_ID,
-    };
-
-    struct CreateWindowResponse
-    {
-        static constexpr u8 id = CREATE_WINDOW_RESPONSE_ID;
-
-        int window;
-    };
-}

libui/include/ui/ipc/Server.h

@@ -1,33 +0,0 @@
-/**
- * @file ipc/Server.h
- * @author apio (cloudapio.eu)
- * @brief IPC message definitions for UI messages sent to the server.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
-#pragma once
-#include <os/IPC.h>
-#include <ui/Color.h>
-#include <ui/Rect.h>
-#include <ui/ipc/Client.h>
-
-namespace ui
-{
-    enum ServerMessages : u8
-    {
-        IPC_ENUM_SERVER(ui),
-        CREATE_WINDOW_ID,
-    };
-
-    struct CreateWindowRequest
-    {
-        using ResponseType = CreateWindowResponse;
-        static constexpr u8 id = CREATE_WINDOW_ID;
-
-        ui::Rect rect;
-        IPC_STRING(name);
-        ui::Color color;
-    };
-}

libui/src/Canvas.cpp

@@ -1,12 +1,3 @@
-/**
- * @file Canvas.cpp
- * @author apio (cloudapio.eu)
- * @brief Drawable surfaces.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #include <ui/Canvas.h>
 
 namespace ui

libui/src/Font.cpp

@@ -1,12 +1,3 @@
-/**
- * @file Font.cpp
- * @author apio (cloudapio.eu)
- * @brief PSF font loading and rendering.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #include <luna/String.h>
 #include <os/File.h>
 #include <ui/Font.h>

libui/src/Image.cpp

@@ -1,12 +1,3 @@
-/**
- * @file Image.cpp
- * @author apio (cloudapio.eu)
- * @brief TGA image loading and rendering.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #include <os/File.h>
 #include <ui/Image.h>
 

libui/src/Rect.cpp

@@ -1,12 +1,3 @@
-/**
- * @file Rect.cpp
- * @author apio (cloudapio.eu)
- * @brief A simple 2D rectangle representation.
- *
- * @copyright Copyright (c) 2023, the Luna authors.
- *
- */
-
 #include <ui/Rect.h>
 
 namespace ui

wind/CMakeLists.txt

@@ -6,9 +6,6 @@ set(SOURCES
     Mouse.cpp
     Window.h
     Window.cpp
-    IPC.cpp
-    IPC.h
-    Client.h
 )
 
 add_executable(wind ${SOURCES})

wind/Client.h

@@ -1,11 +0,0 @@
-#pragma once
-#include "Window.h"
-#include <os/LocalServer.h>
-
-struct Client
-{
-    os::LocalServer::Client conn;
-    Vector<Window*> windows;
-    bool rpc_in_progress { false };
-    u8 rpc_id { 0 };
-};

wind/IPC.cpp

@@ -1,75 +0,0 @@
-#include "IPC.h"
-#include <luna/String.h>
-#include <os/File.h>
-
-static Result<void> handle_create_window_message(Client& client)
-{
-    ui::CreateWindowRequest request;
-    auto rc = client.conn.recv_typed(request);
-    if (rc.has_error())
-    {
-        if (rc.error() == EAGAIN)
-        {
-            client.rpc_in_progress = true;
-            client.rpc_id = ui::CREATE_WINDOW_ID;
-            return {};
-        }
-        else
-            return rc.release_error();
-    }
-
-    request.rect = request.rect.normalized();
-    request.rect.height += Window::titlebar_height(); // Make sure we provide the full contents rect that was asked for.
-
-    auto name = COPY_IPC_STRING(request.name);
-
-    auto* window = new (std::nothrow) Window(request.rect, request.color, move(name));
-    if (!window)
-    {
-        os::IPC::send_error(client.conn, ENOMEM);
-        return {};
-    }
-
-    int id = static_cast<int>(client.windows.size());
-    rc = client.windows.try_append(window);
-    if (rc.has_error())
-    {
-        delete window;
-        os::IPC::send_error(client.conn, rc.error());
-        return {};
-    }
-
-    ui::CreateWindowResponse response;
-    response.window = id;
-    os::IPC::send_async(client.conn, response);
-    return {};
-}
-
-namespace wind
-{
-    Result<void> handle_ipc_message(Client& client, u8 id)
-    {
-        client.rpc_in_progress = false;
-        switch (id)
-        {
-        case ui::CREATE_WINDOW_ID: return handle_create_window_message(client);
-        default: os::eprintln("wind: Invalid IPC message from client!"); return err(EINVAL);
-        }
-    }
-
-    Result<void> handle_ipc(Client& client)
-    {
-        if (client.rpc_in_progress) return handle_ipc_message(client, client.rpc_id);
-
-        u8 id;
-        auto rc = client.conn.recv_typed(id);
-        if (rc.has_error())
-        {
-            if (rc.error() == EAGAIN) { return {}; }
-            else
-                return rc.release_error();
-        }
-
-        return handle_ipc_message(client, id);
-    }
-}

wind/IPC.h

@@ -1,10 +0,0 @@
-#pragma once
-#include "Client.h"
-#include <ui/ipc/Server.h>
-
-namespace wind
-{
-    Result<void> handle_ipc_message(Client& client, u8 id);
-
-    Result<void> handle_ipc(Client& client);
-}

wind/Window.cpp

@@ -38,7 +38,7 @@ void Window::focus()
     g_windows.append(this);
 }
 
-Window::Window(ui::Rect r, ui::Color c, String&& n) : surface(r), color(c), name(move(n))
+Window::Window(ui::Rect r, ui::Color c, StringView n) : surface(r), color(c), name(n)
 {
     auto font = ui::Font::default_font();
     if (surface.width < 36) surface.width = 36;
@@ -48,9 +48,3 @@ Window::Window(ui::Rect r, ui::Color c, String&& n) : surface(r), color(c), name
     contents = ui::Rect { 0, font->height() + 20, surface.width, surface.height - (font->height() + 20) };
     g_windows.append(this);
 }
-
-int Window::titlebar_height()
-{
-    auto font = ui::Font::default_font();
-    return font->height() + 20;
-}

wind/Window.h

@@ -1,6 +1,6 @@
 #pragma once
 #include <luna/LinkedList.h>
-#include <luna/String.h>
+#include <luna/StringView.h>
 #include <ui/Canvas.h>
 #include <ui/Color.h>
 #include <ui/Rect.h>
@@ -12,11 +12,9 @@ struct Window : public LinkedListNode<Window>
     ui::Rect close_button;
     ui::Rect contents;
     ui::Color color;
-    String name;
+    StringView name;
 
-    static int titlebar_height();
+    Window(ui::Rect, ui::Color, StringView);
-
-    Window(ui::Rect, ui::Color, String&&);
 
     void focus();
 

wind/main.cpp

@@ -1,5 +1,3 @@
-#include "Client.h"
-#include "IPC.h"
 #include "Mouse.h"
 #include "Screen.h"
 #include "Window.h"
@@ -22,7 +20,7 @@ Result<int> luna_main(int argc, char** argv)
 {
     srand((unsigned)time(NULL));
 
-    TRY(os::Security::pledge("stdio rpath wpath cpath unix proc exec tty signal id", NULL));
+    TRY(os::Security::pledge("stdio rpath wpath cpath unix proc exec tty id", NULL));
 
     StringView socket_path = "/tmp/wind.sock";
     StringView user;
@@ -84,13 +82,13 @@ Result<int> luna_main(int argc, char** argv)
 
     ui::Color background = ui::BLACK;
 
-    Vector<Client> clients;
+    TRY(make<Window>(ui::Rect { 200, 200, 600, 400 }, ui::GREEN, "Calculator"_sv));
-    Vector<struct pollfd> fds;
+    TRY(make<Window>(ui::Rect { 100, 100, 300, 200 }, ui::RED, "Settings"_sv));
-    TRY(fds.try_append({ .fd = mouse->fd(), .events = POLLIN, .revents = 0 }));
+    TRY(make<Window>(ui::Rect { 600, 130, 350, 250 }, ui::CYAN, "File Manager"_sv));
-    TRY(fds.try_append({ .fd = keyboard->fd(), .events = POLLIN, .revents = 0 }));
-    TRY(fds.try_append({ .fd = server->fd(), .events = POLLIN, .revents = 0 }));
 
-    TRY(os::Security::pledge("stdio rpath unix signal proc", NULL));
+    Vector<os::LocalServer::Client> clients;
+
+    TRY(os::Security::pledge("stdio rpath unix", NULL));
 
     while (1)
     {
@@ -99,9 +97,13 @@ Result<int> luna_main(int argc, char** argv)
         mouse_pointer.draw(screen.canvas());
         screen.sync();
 
-        for (auto& pfd : fds) { pfd.revents = 0; }
+        struct pollfd fds[] = {
+            { .fd = mouse->fd(), .events = POLLIN, .revents = 0 },
+            { .fd = keyboard->fd(), .events = POLLIN, .revents = 0 },
+            { .fd = server->fd(), .events = POLLIN, .revents = 0 },
+        };
 
-        int rc = poll(fds.data(), fds.size(), 1000);
+        int rc = poll(fds, 3, 1000);
         if (!rc) continue;
         if (rc < 0 && errno != EINTR) { os::println("poll: error: %s", strerror(errno)); }
 
@@ -115,31 +117,20 @@ Result<int> luna_main(int argc, char** argv)
         {
             moon::KeyboardPacket packet;
             TRY(keyboard->read_typed(packet));
-            os::println("%s key %d", packet.released ? "Released" : "Pressed", packet.key);
+            if (!packet.released)
-        }
-        for (usize i = 0; i < clients.size(); i++)
             {
-            if (fds[i + 3].revents & POLLIN) wind::handle_ipc(clients[i]);
+                TRY(make<Window>(ui::Rect { rand() % screen.canvas().width, rand() % screen.canvas().height,
-            if (fds[i + 3].revents & POLLHUP)
+                                            rand() % screen.canvas().width, rand() % screen.canvas().height },
-            {
+                                 ui::Color::from_rgb(static_cast<u8>(rand() % 256), static_cast<u8>(rand() % 256),
-                os::println("wind: Client %d disconnected", i);
+                                                     static_cast<u8>(rand() % 256)),
-                fds.remove_at(i + 3);
+                                 strerror(packet.key)));
-                auto client = clients.remove_at(i);
-                client.conn.disconnect();
-                for (auto& window : client.windows)
-                {
-                    g_windows.remove(window);
-                    delete window;
-                }
             }
         }
         if (fds[2].revents & POLLIN)
         {
             auto client = TRY(server->accept());
             os::println("wind: New client connected!");
-            TRY(fds.try_append({ .fd = client.fd(), .events = POLLIN, .revents = 0 }));
+            TRY(clients.try_append(move(client)));
-            Client c { move(client), {} };
-            TRY(clients.try_append(move(c)));
         }
     }
 }