safina-select

This is a Rust library for awaiting multiple futures and getting the value of the first one that completes.

You can use it with safina or any async runtime.

Features

• forbid(unsafe_code)
• Depends only on std
• Good test coverage (92%)

Limitations

• Can await 2-5 futures. Nest them if you need more.

Examples

rust use safina_async_test::async_test; use safina_select::{select_ab, OptionAB}; let conn = match select_ab(make_new(addr.clone()), get_from_pool(addr.clone())).await { OptionAB::A(result) => result?, OptionAB::B(result) => result?, }; // When both futures return the same type, you can use `take`: let conn = select_ab(make_new(addr.clone()), get_from_pool(addr.clone())).await.take()?; rust use safina_async_test::async_test; use safina_select::{select_ab, OptionAB}; safina_timer::start_timer_thread(); let data = match select_ab(read_data(), safina_timer::sleep_until(deadline)).await { OptionAB::A(result) => Ok(result?), OptionAB::B(()) => Err("timeout"), };

Documentation

https://docs.rs/safina-select

TO DO - Alternatives

• tokio::select
  • very popular
  • Fast
  • internally incredibly complicated
  • full of unsafe
• futures::select
  • very popular
  • proc macro, very complicated
  • contains a little unsafe code

Release Process

1. Edit Cargo.toml and bump version number.
2. Run ./release.sh

Changelog

• v0.1.0 - First published version

TO DO

• DONE - Implement sleep_ab
• DONE - Add tests
• DONE - Add docs
• DONE - Add sleep_abc, sleep_abcd, and sleep_abcde
• DONE - Publish on crates.io

License: Apache-2.0