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tokio-1.21.0

tokio-rs/tokiotokio-1.21.0Sep 2, 2022by Darksonn

AI Summary

This release introduces initial WebAssembly support and stabilizes core features like JoinSet and AbortHandle. It adds utility methods for network sockets and improves Windows signal handling.

Key Highlights

  • Initial support for WebAssembly target (wasm32-wasi)
  • Stabilization of JoinSet and AbortHandle for task management
  • Added device binding and TOS methods to TCP/UDP sockets
  • Improved Windows signal handlers
  • Added max_capacity to mpsc::Sender and Weak mpsc::Sender

New Features

  • WASM support for sync, macros, io-util, rt, and time features
  • Stabilized JoinSet and AbortHandle
  • TCP/UDP socket methods: device, bind_device, tos, set_tos
  • Named pipe security flags in ServerOptions
  • mpsc::Sender::max_capacity and Weak version
  • LocalSet::enter for scoped task execution
  • track_caller added to public APIs

Full Release Notes

# 1.21.0 (September 2, 2022)

This release is the first release of Tokio to intentionally support WASM. The `sync,macros,io-util,rt,time` features are stabilized on WASM. Additionally the wasm32-wasi target is given unstable support for the `net` feature.

### Added

- net: add `device` and `bind_device` methods to TCP/UDP sockets ([#4882])
- net: add `tos` and `set_tos` methods to TCP and UDP sockets ([#4877])
- net: add security flags to named pipe `ServerOptions` ([#4845])
- signal: add more windows signal handlers ([#4924])
- sync: add `mpsc::Sender::max_capacity` method ([#4904])
- sync: implement Weak version of `mpsc::Sender` ([#4595])
- task: add `LocalSet::enter` ([#4765])
- task: stabilize `JoinSet` and `AbortHandle` ([#4920])
- tokio: add `track_caller` to public APIs ([#4805], [#4848], [#4852])
- wasm: initial support for `wasm32-wasi` target ([#4716])

### Fixed

- miri: improve miri compatibility by avoiding temporary references in `linked_list::Link` impls ([#4841])
- signal: don't register write interest on signal pipe ([#4898])
- sync: add `#[must_use]` to lock guards ([#4886])
- sync: fix hang when calling `recv` on closed and reopened broadcast channel ([#4867])
- task: propagate attributes on task-locals ([#4837])

### Changed

- fs: change panic to error in `File::start_seek` ([#4897])
- io: reduce syscalls in `poll_read` ([#4840])
- process: use blocking threadpool for child stdio I/O ([#4824])
- signal: make `SignalKind` methods const ([#4956])

### Internal changes

- rt: extract `basic_scheduler::Config` ([#4935])
- rt: move I/O driver into `runtime` module ([#4942])
- rt: rename internal scheduler types ([#4945])

### Documented

- chore: fix typos and grammar ([#4858], [#4894], [#4928])
- io: fix typo in `AsyncSeekExt::rewind` docs ([#4893])
- net: add documentation to `try_read()` for zero-length buffers ([#4937])
- runtime: remove incorrect panic section for `Builder::worker_threads` ([#4849])
- sync: doc of `watch::Sender::send` improved ([#4959])
- task: add cancel safety docs to `JoinHandle` ([#4901])
- task: expand on cancellation of `spawn_blocking` ([#4811])
- time: clarify that the first tick of `Interval::tick` happens immediately ([#4951])

### Unstable

- rt: add unstable option to disable the LIFO slot ([#4936])
- task: fix incorrect signature in `Builder::spawn_on` ([#4953])
- task: make `task::Builder::spawn*` methods fallible ([#4823])

[#4595]: https://github.com/tokio-rs/tokio/pull/4595
[#4716]: https://github.com/tokio-rs/tokio/pull/4716
[#4765]: https://github.com/tokio-rs/tokio/pull/4765
[#4805]: https://github.com/tokio-rs/tokio/pull/4805
[#4811]: https://github.com/tokio-rs/tokio/pull/4811
[#4823]: https://github.com/tokio-rs/tokio/pull/4823
[#4824]: https://github.com/tokio-rs/tokio/pull/4824
[#4837]: https://github.com/tokio-rs/tokio/pull/4837
[#4840]: https://github.com/tokio-rs/tokio/pull/4840
[#4841]: https://github.com/tokio-rs/tokio/pull/4841
[#4845]: https://github.com/tokio-rs/tokio/pull/4845
[#4848]: https://github.com/tokio-rs/tokio/pull/4848
[#4849]: https://github.com/tokio-rs/tokio/pull/4849
[#4852]: https://github.com/tokio-rs/tokio/pull/4852
[#4858]: https://github.com/tokio-rs/tokio/pull/4858
[#4867]: https://github.com/tokio-rs/tokio/pull/4867
[#4877]: https://github.com/tokio-rs/tokio/pull/4877
[#4882]: https://github.com/tokio-rs/tokio/pull/4882
[#4886]: https://github.com/tokio-rs/tokio/pull/4886
[#4893]: https://github.com/tokio-rs/tokio/pull/4893
[#4894]: https://github.com/tokio-rs/tokio/pull/4894
[#4897]: https://github.com/tokio-rs/tokio/pull/4897
[#4898]: https://github.com/tokio-rs/tokio/pull/4898
[#4901]: https://github.com/tokio-rs/tokio/pull/4901
[#4904]: https://github.com/tokio-rs/tokio/pull/4904
[#4920]: https://github.com/tokio-rs/tokio/pull/4920
[#4924]: https://github.com/tokio-rs/tokio/pull/4924
[#4928]: https://github.com/tokio-rs/tokio/pull/4928
[#4935]: https://github.com/tokio-rs/tokio/pull/4935
[#4936]: https://github.com/tokio-rs/tokio/pull/4936
[#4937]: https://github.com/tokio-rs/tokio/pull/4937
[#4942]: https://github.com/tokio-rs/tokio/pull/4942
[#4945]: https://github.com/tokio-rs/tokio/pull/4945
[#4951]: https://github.com/tokio-rs/tokio/pull/4951
[#4953]: https://github.com/tokio-rs/tokio/pull/4953
[#4956]: https://github.com/tokio-rs/tokio/pull/4956
[#4959]: https://github.com/tokio-rs/tokio/pull/4959