Expand description

crates.io version license: Apache 2.0 unsafe forbidden pipeline status

A safe Rust async runtime.

This crate simply re-exports the various safina-* crates.


  • forbid(unsafe_code)
  • Depends only on std
  • Good test coverage (>95%)


  • Building on stable requires once_cell crate which contains some unsafe code. This is necessary until std::lazy::OnceCell is stable.
  • No fs module yet. async-fs is a fast async networking library that works well with Safina. It contains some unsafe code.
  • net module has poor performance. async-net is a fast async networking library that works well with Safina. It contains some unsafe code.
  • Not optimized


let executor = safina::executor::Executor::default();
let (sender, receiver) = std::sync::mpsc::channel();
executor.spawn(async move {
let result = safina::executor::block_on(async {
  • safina_async_test crate has an #[async_test] macro for running async fn test functions.


  • smol
    • Popular
    • Contains some unsafe code
  • async-std
    • Very popular
    • Contains generous amounts of unsafe code
  • futures
    • Very popular
    • Contains generous amounts of unsafe code
  • tokio
    • Very popular
    • Fast
    • Internally extremely complicated
    • Full of unsafe code
  • bastion
    • Generous amounts of unsafe code
  • nostd_async


  • v0.3.3 - Update docs.
  • v0.3.2 - Add threadpool module.
  • v0.3.1
    • Add sync_channel and SyncSender.
    • Add Receiver::async_recv to let users await without writing ugly (&mut receiver).await.
    • Remove Receiver::blocking and add try_recv, recv, etc.
  • v0.3.0
    • Move structs into sub-modules.
    • Replace Promise with oneshot, OneSender, and Receiver that supports async and blocking reads.
    • schedule_blocking to return new sync::Receiver.
  • v0.2.1 - Update docs.
  • v0.2.0
    • Executor::new and Executor::with_name to return Result.
    • ThreadPool::new to return Result.
    • ThreadPool::try_schedule to return an error when it fails to restart panicked threads.
    • ThreadPool::schedule to handle failure starting replacement threads.
  • v0.1.10 - block_on functions to take futures that are not Send.
  • v0.1.9 - Use once_cell by default.
  • v0.1.8 - Support stable with rust 1.51 and once_cell.
  • v0.1.7 - Add safina-net
  • v0.1.6 - Use safina-executor v0.1.3 API
  • v0.1.5 - Add safina_sync::Mutex
  • v0.1.4 - Upgrade to new safina-executor version which removes need for Box::pin.
  • v0.1.3 - Update docs
  • v0.1.2 - Renamed safina crate to safina-executor. Added new safina crate with re-exports, examples, and integration tests.
  • v0.1.1 - Add badges to readme
  • v0.1.0 - First published version


  • Add init function that makes an executor and starts the timer thread.
  • Add an #[async_main] macro