Condy🍬

C++ Asynchronous System Call Layer for Linux, Powered by io_uring and C++20 Coroutines

Condy is designed to provide an intuitive, high-performance coroutine runtime on top of io_uring:

• 🛠️ Comprehensive io_uring Integration Designed to integrate and maintain support for most io_uring features, with ongoing updates to track kernel and liburing advancements.

• 🏃 Low Overhead Efficient template-based abstractions and precise lifetime management eliminate nearly all heap allocations outside coroutine frames, resulting in extremely low runtime overhead.

• 💡 Intuitive Programming Model Write asynchronous code in a direct, readable style using C++20 coroutines—no callbacks. Friendly APIs, high-level combinators, and channels make complex async flows easy to express.

Quick Start

// hello.cpp
#include <condy.hpp>

condy::Coro<> co_main() {
    std::string msg = "Hello, Condy!\n";
    co_await condy::async_write(STDOUT_FILENO, condy::buffer(msg), 0);
}

int main() { condy::sync_wait(co_main()); }

# Make sure liburing (>=2.3) is installed on your system
# On Ubuntu: sudo apt install liburing-dev
c++ hello.cpp -o hello -std=c++20 -luring -I./include
./hello
# Hello, Condy!

See Documentation for more details.

Documentation

• Online Docs (GitHub Pages)
• Building and Usage: How to build and integrate Condy in your project.
• User Guide: Step-by-step introduction to Condy’s concepts and usage.
• Benchmarks: Performance comparison between Condy and other frameworks.
• Examples: Practical Condy code samples.
• Async Operation Types: Overview and classification of supported io_uring async operation variants.

Support

• For questions, bug reports, or feature requests, please open an issue.
• Pull requests are welcome!