Lagom: Move this into Meta/

This is more of a meta thing, since it's not seeing active development,
but is just a way for me to build some Serenity parts and include them
in other projects. Move it out of the root to keep things tidy.

Meta/Lagom/.gitignore

@@ -0,0 +1,5 @@
+liblagom.a
+CMakeCache.txt
+CMakeFiles
+Makefile
+cmake_install.cmake

Meta/Lagom/CMakeLists.txt

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+cmake_minimum_required (VERSION 3.0)
+project (Lagom)
+
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2 -Wall -Wextra -Werror -std=c++17 -fPIC -g")
+
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wconsumed")
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-expansion-to-defined")
+endif()
+
+file(GLOB AK_SOURCES "../AK/*.cpp")
+file(GLOB LIBCORE_SOURCES "../Libraries/LibCore/*.cpp")
+file(GLOB LIBIPC_SOURCES "../Libraries/LibIPC/*.cpp")
+
+set(SOURCES ${AK_SOURCES} ${LIBCORE_SOURCES} ${LIBIPC_SOURCES})
+
+include_directories (../)
+include_directories (../Libraries/)
+add_library(lagom ${SOURCES})
+
+add_executable(TestApp TestApp.cpp)
+target_link_libraries(TestApp lagom)
+target_link_libraries(TestApp stdc++)
+
+#add_executable(SimpleIPCClient SimpleIPCClient.cpp)
+#target_link_libraries(SimpleIPCClient lagom)
+#target_link_libraries(SimpleIPCClient stdc++)
+
+#add_executable(SimpleIPCServer SimpleIPCServer.cpp)
+#target_link_libraries(SimpleIPCServer lagom)
+#target_link_libraries(SimpleIPCServer stdc++)

Meta/Lagom/ReadMe.md

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+# Lagom
+
+The Serenity C++ library, for other Operating Systems.
+
+## About
+
+If you want to bring the comfortable Serenity classes with you to another system, look no further. This is basically a "port" of the `AK` and `LibCore` libraries to generic \*nix systems.
+
+*Lagom* is a Swedish word that means "just the right amount." ([Wikipedia](https://en.wikipedia.org/wiki/Lagom))

Meta/Lagom/SimpleIPC.ipc

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+endpoint Simple {
+    ComputeSum(i32 a, i32 b, i32 c) => (i32 sum)
+}

Meta/Lagom/SimpleIPCClient.cpp

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+#include <LibCore/CEventLoop.h>
+#include <LibCore/CTimer.h>
+#include <LibCore/CoreIPCClient.h>
+#include <stdio.h>
+#include "SimpleEndpoint.h"
+
+class SimpleIPCClient : public IPC::Client::ConnectionNG<SimpleEndpoint> {
+    C_OBJECT(SimpleIPCClient)
+public:
+    SimpleIPCClient()
+        : ConnectionNG("/tmp/simple-ipc")
+    {}
+
+    virtual void handshake() override {}
+
+    i32 compute_sum(i32 a, i32 b, i32 c)
+    {
+        return send_sync<Simple::ComputeSum>(a, b, c)->sum();
+    }
+};
+
+int main(int, char**)
+{
+    CEventLoop event_loop;
+
+    SimpleIPCClient client;
+
+    CTimer timer(100, [&] {
+        i32 sum = client.compute_sum(1, 2, 3);
+        dbg() << "Sum: " << sum;
+    });
+
+    CTimer kill_timer(5000, [&] {
+        dbg() << "Timer fired, good-bye! :^)";
+        event_loop.quit(0);
+    });
+
+    return event_loop.exec();
+}

Meta/Lagom/SimpleIPCServer.cpp

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+#include <LibCore/CEventLoop.h>
+#include <LibCore/CTimer.h>
+#include <LibCore/CoreIPCServer.h>
+#include <LibCore/CLocalServer.h>
+#include <stdio.h>
+#include "SimpleEndpoint.h"
+
+class SimpleIPCServer final :
+    public IPC::Server::ConnectionNG<SimpleEndpoint>,
+    public SimpleEndpoint {
+
+    C_OBJECT(SimpleIPCServer)
+public:
+    SimpleIPCServer(CLocalSocket& socket, int client_id)
+        : ConnectionNG(*this, socket, client_id)
+    {
+    }
+
+    virtual OwnPtr<Simple::ComputeSumResponse> handle(const Simple::ComputeSum& message)
+    {
+        return make<Simple::ComputeSumResponse>(message.a() + message.b() + message.c());
+    }
+};
+
+int main(int, char**)
+{
+    CEventLoop event_loop;
+
+    unlink("/tmp/simple-ipc");
+    auto server = CLocalServer::construct();
+    server->listen("/tmp/simple-ipc");
+    server->on_ready_to_accept = [&] {
+        auto client_socket = server->accept();
+        ASSERT(client_socket);
+        static int next_client_id = 0;
+        IPC::Server::new_connection_ng_for_client<SimpleIPCServer>(*client_socket, ++next_client_id);
+    };
+
+    return event_loop.exec();
+}

Meta/Lagom/TestApp.cpp

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+#include <LibCore/CEventLoop.h>
+#include <LibCore/CTimer.h>
+#include <stdio.h>
+
+int main(int, char**)
+{
+    CEventLoop event_loop;
+
+    auto timer = CTimer::construct(100, [&] {
+        dbg() << "Timer fired, good-bye! :^)";
+        event_loop.quit(0);
+    });
+
+    return event_loop.exec();
+}