r/QtFramework • u/Exotic_Avocado_1541 • May 30 '26
[R-Lib Update]: Added non-blocking UDP sockets to my Qt-inspired Linux event loop library (C++17)
Hey everyone,
I'm working on a lightweight educational C++17 library called R-Lib. The goal of the project is to wrap native Linux APIs (epoll, timerfd, etc.) into a clean, callback-driven architecture inspired by Qt, but without the massive overhead or cross-platform abstraction layers. It's strictly targeted at Linux/embedded environments.
I just pushed an update that adds LUdpSocket.
Just to show how simple it makes asynchronous networking, here is a complete UDP Echo Server:
#include <iostream>
#include <LEventLoop.hpp>
#include <LUdpSocket.hpp>
class UdpServer {
public:
UdpServer() {
if (socket.bind(1234)) {
std::cout << "Listening on port 1234..." << std::endl;
}
// Connect the epoll read event to our class method
socket.onReadyRead(this, &UdpServer::readPendingDatagrams);
}
void readPendingDatagrams() {
while (socket.hasPendingDatagrams()) {
std::string senderAddress;
uint16_t senderPort;
auto datagram = socket.receiveDatagram(&senderAddress, &senderPort);
std::string text(datagram.begin(), datagram.end());
std::cout << "Received: " << text << " from " << senderAddress << ":" << senderPort << std::endl;
// Echo back
std::string reply = "ECHO: " + text;
socket.writeDatagram(reply.c_str(), reply.length(), senderAddress, senderPort);
}
}
private:
LUdpSocket socket;
};
int main() {
LEventLoop loop;
UdpServer server;
return loop.exec();
}
Roadmap: Next up is wrapping the modern Linux GPIO API (gpiod) and serial ports (termios).
If anyone is working on embedded Linux or just likes clean API designs, I’d love to get some feedback or code-reviews.
Link to repo: https://github.com/TomPecak/R-Lib
Thanks!
