Audit · tokio@1.52.3

cargo : tokio @ 1.52.3
PE Patrick Elsen signed 2026-05-28 published 2026-05-28
`CHANGELOG.md`

4,502 lines · markdown
# 1.52.3 (May 8th, 2026)### Fixed* sync: fix underflow in mpsc channel `len()` ([#8062])* sync: notify receivers in mpsc `OwnedPermit::release()` method ([#8075])* sync: require that an `RwLock` has `max_readers != 0` ([#8076])* sync: return `Empty` from `try_recv()` when mpsc is closed with outstanding permits ([#8074])# 1.52.2 (May 4th, 2026)This release reverts the LIFO slot stealing change introduced in 1.51.0([#7431]), due to [its performance impact][#8065]. ([#8100])# 1.52.1 (April 16th, 2026)## Fixed- runtime: revert [#7757] to fix [a regression][#8056] that causes `spawn_blocking` to hang ([#8057])[#7757]: https://github.com/tokio-rs/tokio/pull/7757[#8056]: https://github.com/tokio-rs/tokio/pull/8056[#8057]: https://github.com/tokio-rs/tokio/pull/8057# 1.52.0 (April 14th, 2026)## Added- io: `AioSource::register_borrowed` for I/O safety support ([#7992])- net: add `try_io` function to `unix::pipe` sender and receiver types ([#8030])## Added (unstable)- runtime: `Builder::enable_eager_driver_handoff` setting enable eager hand off of the I/O and time drivers before polling tasks ([#8010])- taskdump: add `trace_with()` for customized task dumps ([#8025])- taskdump: allow `impl FnMut()` in `trace_with` instead of just `fn()` ([#8040])- fs: support `io_uring` in `AsyncRead` for `File` ([#7907])## Changed- runtime: improve `spawn_blocking` scalability with sharded queue ([#7757])- runtime: use `compare_exchange_weak()` in worker queue ([#8028])## Fixed- runtime: overflow second half of tasks when local queue is filled instead of first half ([#8029])## Documented- docs: fix typo in `oneshot::Sender::send` docs ([#8026])- docs: hide #[tokio::main] attribute in the docs of `sync::watch` ([#8035])- net: add docs on `ConnectionRefused` errors with UDP sockets ([#7870])[#7757]: https://github.com/tokio-rs/tokio/pull/7757[#7870]: https://github.com/tokio-rs/tokio/pull/7870[#7907]: https://github.com/tokio-rs/tokio/pull/7907[#7992]: https://github.com/tokio-rs/tokio/pull/7992[#8010]: https://github.com/tokio-rs/tokio/pull/8010[#8025]: https://github.com/tokio-rs/tokio/pull/8025[#8026]: https://github.com/tokio-rs/tokio/pull/8026[#8028]: https://github.com/tokio-rs/tokio/pull/8028[#8029]: https://github.com/tokio-rs/tokio/pull/8029[#8030]: https://github.com/tokio-rs/tokio/pull/8030[#8035]: https://github.com/tokio-rs/tokio/pull/8035[#8040]: https://github.com/tokio-rs/tokio/pull/8040# 1.51.3 (May 8th, 2026)### Fixed* sync: fix underflow in mpsc channel `len()` ([#8062])* sync: notify receivers in mpsc `OwnedPermit::release()` method ([#8075])* sync: require that an `RwLock` has `max_readers != 0` ([#8076])* sync: return `Empty` from `try_recv()` when mpsc is closed with outstanding permits ([#8074])# 1.51.2 (May 4th, 2026)This release reverts the LIFO slot stealing change introduced in 1.51.0([#7431]), due to [its performance impact][#8065]. ([#8100])[#8065]: https://github.com/tokio-rs/tokio/pull/8065[#8100]: https://github.com/tokio-rs/tokio/pull/8100# 1.51.1 (April 8th, 2026)### Fixed- sync: fix semaphore reopens after forget ([#8021])- net: surface errors from `SO_ERROR` on `recv` for UDP sockets on Linux ([#8001])### Fixed (unstable)- metrics: fix `worker_local_schedule_count` test ([#8008])- rt: do not leak fd when cancelling io\_uring open operation ([#7983])[#7983]: https://github.com/tokio-rs/tokio/pull/7983[#8001]: https://github.com/tokio-rs/tokio/pull/8001[#8008]: https://github.com/tokio-rs/tokio/pull/8008[#8021]: https://github.com/tokio-rs/tokio/pull/8021# 1.51.0 (April 3rd, 2026)### Added- net: implement `get_peer_cred` on Hurd ([#7989])- runtime: add `tokio::runtime::worker_index()` ([#7921])- runtime: add runtime name ([#7924])- runtime: stabilize `LocalRuntime` ([#7557])- wasm: add wasm32-wasip2 networking support ([#7933])### Changed- runtime: steal tasks from the LIFO slot ([#7431])### Fixed- docs: do not show "Available on non-loom only." doc label ([#7977])- macros: improve overall macro hygiene ([#7997])- sync: fix `notify_waiters` priority in `Notify` ([#7996])- sync: fix panic in `Chan::recv_many` when called with non-empty vector on closed channel ([#7991])[#7431]: https://github.com/tokio-rs/tokio/pull/7431[#7557]: https://github.com/tokio-rs/tokio/pull/7557[#7921]: https://github.com/tokio-rs/tokio/pull/7921[#7924]: https://github.com/tokio-rs/tokio/pull/7924[#7933]: https://github.com/tokio-rs/tokio/pull/7933[#7977]: https://github.com/tokio-rs/tokio/pull/7977[#7989]: https://github.com/tokio-rs/tokio/pull/7989[#7991]: https://github.com/tokio-rs/tokio/pull/7991[#7996]: https://github.com/tokio-rs/tokio/pull/7996[#7997]: https://github.com/tokio-rs/tokio/pull/7997# 1.50.0 (Mar 3rd, 2026)### Added- net: add `TcpStream::set_zero_linger` ([#7837])- rt: add `is_rt_shutdown_err` ([#7771])### Changed- io: add optimizer hint that `memchr` returns in-bounds pointer ([#7792])- io: implement vectored writes for `write_buf` ([#7871])- runtime: panic when `event_interval` is set to 0 ([#7838])- runtime: shorten default thread name to fit in Linux limit ([#7880])- signal: remember the result of `SetConsoleCtrlHandler` ([#7833])- signal: specialize windows `Registry` ([#7885])### Fixed- io: always cleanup `AsyncFd` registration list on deregister ([#7773])- macros: remove (most) local `use` declarations in `tokio::select!` ([#7929])- net: fix `GET_BUF_SIZE` constant for `target_os = "android"` ([#7889])- runtime: avoid redundant unpark in current_thread scheduler ([#7834])- runtime: don't park in `current_thread` if `before_park` defers waker ([#7835])- io: fix write readiness on ESP32 on short writes ([#7872])- runtime: wake deferred tasks before entering `block_in_place` ([#7879])- sync: drop rx waker when oneshot receiver is dropped ([#7886])- runtime: fix double increment of `num_idle_threads` on shutdown ([#7910], [#7918], [#7922])### Unstable- fs: check for io-uring opcode support ([#7815])- runtime: avoid lock acquisition after uring init ([#7850])### Documented- docs: update outdated unstable features section ([#7839])- io: clarify the behavior of `AsyncWriteExt::shutdown()` ([#7908])- io: explain how to flush stdout/stderr ([#7904])- io: fix incorrect and confusing `AsyncWrite` documentation ([#7875])- rt: clarify the documentation of `Runtime::spawn` ([#7803])- rt: fix missing quotation in docs ([#7925])- runtime: correct the default thread name in docs ([#7896])- runtime: fix `event_interval` doc ([#7932])- sync: clarify RwLock fairness documentation ([#7919])- sync: clarify that `recv` returns `None` once closed and no more messages ([#7920])- task: clarify when to use `spawn_blocking` vs dedicated threads ([#7923])- task: doc that task drops before `JoinHandle` completion ([#7825])- signal: guarantee that listeners never return `None` ([#7869])- task: fix task module feature flags in docs ([#7891])- task: fix two typos ([#7913])- task: improve the docs of `Builder::spawn_local` ([#7828])- time: add docs about auto-advance and when to use sleep ([#7858])- util: fix typo in docs ([#7926])[#7771]: https://github.com/tokio-rs/tokio/pull/7771[#7773]: https://github.com/tokio-rs/tokio/pull/7773[#7792]: https://github.com/tokio-rs/tokio/pull/7792[#7803]: https://github.com/tokio-rs/tokio/pull/7803[#7815]: https://github.com/tokio-rs/tokio/pull/7815[#7825]: https://github.com/tokio-rs/tokio/pull/7825[#7828]: https://github.com/tokio-rs/tokio/pull/7828[#7833]: https://github.com/tokio-rs/tokio/pull/7833[#7834]: https://github.com/tokio-rs/tokio/pull/7834[#7835]: https://github.com/tokio-rs/tokio/pull/7835[#7837]: https://github.com/tokio-rs/tokio/pull/7837[#7838]: https://github.com/tokio-rs/tokio/pull/7838[#7839]: https://github.com/tokio-rs/tokio/pull/7839[#7850]: https://github.com/tokio-rs/tokio/pull/7850[#7858]: https://github.com/tokio-rs/tokio/pull/7858[#7869]: https://github.com/tokio-rs/tokio/pull/7869[#7871]: https://github.com/tokio-rs/tokio/pull/7871[#7872]: https://github.com/tokio-rs/tokio/pull/7872[#7875]: https://github.com/tokio-rs/tokio/pull/7875[#7879]: https://github.com/tokio-rs/tokio/pull/7879[#7880]: https://github.com/tokio-rs/tokio/pull/7880[#7885]: https://github.com/tokio-rs/tokio/pull/7885[#7886]: https://github.com/tokio-rs/tokio/pull/7886[#7889]: https://github.com/tokio-rs/tokio/pull/7889[#7891]: https://github.com/tokio-rs/tokio/pull/7891[#7896]: https://github.com/tokio-rs/tokio/pull/7896[#7904]: https://github.com/tokio-rs/tokio/pull/7904[#7908]: https://github.com/tokio-rs/tokio/pull/7908[#7910]: https://github.com/tokio-rs/tokio/pull/7910[#7913]: https://github.com/tokio-rs/tokio/pull/7913[#7918]: https://github.com/tokio-rs/tokio/pull/7918[#7919]: https://github.com/tokio-rs/tokio/pull/7919[#7920]: https://github.com/tokio-rs/tokio/pull/7920[#7922]: https://github.com/tokio-rs/tokio/pull/7922[#7923]: https://github.com/tokio-rs/tokio/pull/7923[#7925]: https://github.com/tokio-rs/tokio/pull/7925[#7926]: https://github.com/tokio-rs/tokio/pull/7926[#7929]: https://github.com/tokio-rs/tokio/pull/7929[#7932]: https://github.com/tokio-rs/tokio/pull/7932# 1.49.0 (January 3rd, 2026)### Added* net: add support for `TCLASS` option on IPv6 ([#7781])* runtime: stabilize `runtime::id::Id` ([#7125])* task: implement `Extend` for `JoinSet` ([#7195])* task: stabilize the `LocalSet::id()` ([#7776])### Changed* net: deprecate `{TcpStream,TcpSocket}::set_linger` ([#7752])### Fixed* macros: fix the hygiene issue of `join!` and `try_join!` ([#7766])* runtime: revert "replace manual vtable definitions with Wake" ([#7699])* sync: return `TryRecvError::Disconnected` from `Receiver::try_recv` after `Receiver::close` ([#7686])* task: remove unnecessary trait bounds on the `Debug` implementation ([#7720])### Unstable* fs: handle `EINTR` in `fs::write` for io-uring ([#7786])* fs: support io-uring with `tokio::fs::read` ([#7696])* runtime: disable io-uring on `EPERM` ([#7724])* time: add alternative timer for better multicore scalability ([#7467])### Documented* docs: fix a typos in `bounded.rs` and `park.rs` ([#7817])* io: add `SyncIoBridge` cross-references to `copy` and `copy_buf` ([#7798])* io: doc that `AsyncWrite` does not inherit from `std::io::Write` ([#7705])* metrics: clarify that `num_alive_tasks` is not strongly consistent ([#7614])* net: clarify the cancellation safety of the `TcpStream::peek` ([#7305])* net: clarify the drop behavior of `unix::OwnedWriteHalf` ([#7742])* net: clarify the platform-dependent backlog in `TcpSocket` docs ([#7738])* runtime: mention `LocalRuntime` in `new_current_thread` docs ([#7820])* sync: add missing period to `mpsc::Sender::try_send` docs ([#7721])* sync: clarify the cancellation safety of `oneshot::Receiver` ([#7780])* sync: improve the docs for the `errors` of mpsc ([#7722])* task: add example for `spawn_local` usage on local runtime ([#7689])[#7125]: https://github.com/tokio-rs/tokio/pull/7125[#7195]: https://github.com/tokio-rs/tokio/pull/7195[#7305]: https://github.com/tokio-rs/tokio/pull/7305[#7467]: https://github.com/tokio-rs/tokio/pull/7467[#7614]: https://github.com/tokio-rs/tokio/pull/7614[#7686]: https://github.com/tokio-rs/tokio/pull/7686[#7689]: https://github.com/tokio-rs/tokio/pull/7689[#7696]: https://github.com/tokio-rs/tokio/pull/7696[#7699]: https://github.com/tokio-rs/tokio/pull/7699[#7705]: https://github.com/tokio-rs/tokio/pull/7705[#7720]: https://github.com/tokio-rs/tokio/pull/7720[#7721]: https://github.com/tokio-rs/tokio/pull/7721[#7722]: https://github.com/tokio-rs/tokio/pull/7722[#7724]: https://github.com/tokio-rs/tokio/pull/7724[#7738]: https://github.com/tokio-rs/tokio/pull/7738[#7742]: https://github.com/tokio-rs/tokio/pull/7742[#7752]: https://github.com/tokio-rs/tokio/pull/7752[#7766]: https://github.com/tokio-rs/tokio/pull/7766[#7776]: https://github.com/tokio-rs/tokio/pull/7776[#7780]: https://github.com/tokio-rs/tokio/pull/7780[#7781]: https://github.com/tokio-rs/tokio/pull/7781[#7786]: https://github.com/tokio-rs/tokio/pull/7786[#7798]: https://github.com/tokio-rs/tokio/pull/7798[#7817]: https://github.com/tokio-rs/tokio/pull/7817[#7820]: https://github.com/tokio-rs/tokio/pull/7820# 1.48.0 (October 14th, 2025)The MSRV is increased to 1.71.### Added- fs: add `File::max_buf_size` ([#7594])- io: export `Chain` of `AsyncReadExt::chain` ([#7599])- net: add `SocketAddr::as_abstract_name` ([#7491])- net: add `TcpStream::quickack` and `TcpStream::set_quickack` ([#7490])- net: implement `AsRef<Self>` for `TcpStream` and `UnixStream` ([#7573])- task: add `LocalKey::try_get` ([#7666])- task: implement `Ord` for `task::Id` ([#7530])### Changed- deps: bump windows-sys to version 0.61 ([#7645])- fs: preserve `max_buf_size` when cloning a `File` ([#7593])- macros: suppress `clippy::unwrap_in_result` in `#[tokio::main]` ([#7651])- net: remove `PollEvented` noise from Debug formats ([#7675])- process: upgrade `Command::spawn_with` to use `FnOnce` ([#7511])- sync: remove inner mutex in `SetOnce` ([#7554])- sync: use `UnsafeCell::get_mut` in `Mutex::get_mut` and `RwLock::get_mut` ([#7569])- time: reduce the generated code size of `Timeout<T>::poll` ([#7535])### Fixed- macros: fix hygiene issue in `join!` and `try_join!` ([#7638])- net: fix copy/paste errors in udp peek methods ([#7604])- process: fix error when runtime is shut down on nightly-2025-10-12 ([#7672])- runtime: use release ordering in `wake_by_ref()` even if already woken ([#7622])- sync: close the `broadcast::Sender` in `broadcast::Sender::new()` ([#7629])- sync: fix implementation of unused `RwLock::try_*` methods ([#7587])### Unstable- tokio: use cargo features instead of `--cfg` flags for `taskdump` and `io_uring` ([#7655], [#7621])- fs: support `io_uring` in `fs::write` ([#7567])- fs: support `io_uring` with `File::open()` ([#7617])- fs: support `io_uring` with `OpenOptions` ([#7321])- macros: add `local` runtime flavor ([#7375], [#7597])### Documented- io: clarify the zero capacity case of `AsyncRead::poll_read` ([#7580])- io: fix typos in the docs of `AsyncFd` readiness guards ([#7583])- net: clarify socket gets closed on drop ([#7526])- net: clarify the behavior of `UCred::pid()` on Cygwin ([#7611])- net: clarify the supported platform of `set_reuseport()` and `reuseport()` ([#7628])- net: qualify that `SO_REUSEADDR` is only set on Unix ([#7533])- runtime: add guide for choosing between runtime types ([#7635])- runtime: clarify the behavior of `Handle::block_on` ([#7665])- runtime: clarify the edge case of `Builder::global_queue_interval()` ([#7605])- sync: clarify bounded channel panic behavior ([#7641])- sync: clarify the behavior of `tokio::sync::watch::Receiver` ([#7584])- sync: document cancel safety on `SetOnce::wait` ([#7506])- sync: fix the docs of `parking_lot` feature flag ([#7663])- sync: improve the docs of `UnboundedSender::send` ([#7661])- sync: improve the docs of `sync::watch` ([#7601])- sync: reword allocation failure paragraph in broadcast docs ([#7595])- task: clarify the behavior of several `spawn_local` methods ([#7669])- task: clarify the task ID reuse guarantees ([#7577])- task: improve the example of `poll_proceed` ([#7586])[#7321]: https://github.com/tokio-rs/tokio/pull/7321[#7375]: https://github.com/tokio-rs/tokio/pull/7375[#7490]: https://github.com/tokio-rs/tokio/pull/7490[#7491]: https://github.com/tokio-rs/tokio/pull/7491[#7494]: https://github.com/tokio-rs/tokio/pull/7494[#7506]: https://github.com/tokio-rs/tokio/pull/7506[#7511]: https://github.com/tokio-rs/tokio/pull/7511[#7526]: https://github.com/tokio-rs/tokio/pull/7526[#7530]: https://github.com/tokio-rs/tokio/pull/7530[#7533]: https://github.com/tokio-rs/tokio/pull/7533[#7535]: https://github.com/tokio-rs/tokio/pull/7535[#7554]: https://github.com/tokio-rs/tokio/pull/7554[#7567]: https://github.com/tokio-rs/tokio/pull/7567[#7569]: https://github.com/tokio-rs/tokio/pull/7569[#7573]: https://github.com/tokio-rs/tokio/pull/7573[#7577]: https://github.com/tokio-rs/tokio/pull/7577[#7580]: https://github.com/tokio-rs/tokio/pull/7580[#7583]: https://github.com/tokio-rs/tokio/pull/7583[#7584]: https://github.com/tokio-rs/tokio/pull/7584[#7586]: https://github.com/tokio-rs/tokio/pull/7586[#7587]: https://github.com/tokio-rs/tokio/pull/7587[#7593]: https://github.com/tokio-rs/tokio/pull/7593[#7594]: https://github.com/tokio-rs/tokio/pull/7594[#7595]: https://github.com/tokio-rs/tokio/pull/7595[#7597]: https://github.com/tokio-rs/tokio/pull/7597[#7599]: https://github.com/tokio-rs/tokio/pull/7599[#7601]: https://github.com/tokio-rs/tokio/pull/7601[#7604]: https://github.com/tokio-rs/tokio/pull/7604[#7605]: https://github.com/tokio-rs/tokio/pull/7605[#7611]: https://github.com/tokio-rs/tokio/pull/7611[#7617]: https://github.com/tokio-rs/tokio/pull/7617[#7621]: https://github.com/tokio-rs/tokio/pull/7621[#7622]: https://github.com/tokio-rs/tokio/pull/7622[#7628]: https://github.com/tokio-rs/tokio/pull/7628[#7629]: https://github.com/tokio-rs/tokio/pull/7629[#7635]: https://github.com/tokio-rs/tokio/pull/7635[#7638]: https://github.com/tokio-rs/tokio/pull/7638[#7641]: https://github.com/tokio-rs/tokio/pull/7641[#7645]: https://github.com/tokio-rs/tokio/pull/7645[#7651]: https://github.com/tokio-rs/tokio/pull/7651[#7655]: https://github.com/tokio-rs/tokio/pull/7655[#7661]: https://github.com/tokio-rs/tokio/pull/7661[#7663]: https://github.com/tokio-rs/tokio/pull/7663[#7665]: https://github.com/tokio-rs/tokio/pull/7665[#7666]: https://github.com/tokio-rs/tokio/pull/7666[#7669]: https://github.com/tokio-rs/tokio/pull/7669[#7672]: https://github.com/tokio-rs/tokio/pull/7672[#7675]: https://github.com/tokio-rs/tokio/pull/7675# 1.47.5 (May 7th, 2026)### Fixed* sync: fix underflow in mpsc channel `len()` ([#8062])* sync: notify receivers in mpsc `OwnedPermit::release()` method ([#8075])* sync: require that an `RwLock` has `max_readers != 0` ([#8076])* sync: return `Empty` from `try_recv()` when mpsc is closed with outstanding permits ([#8074])[#8062]: https://github.com/tokio-rs/tokio/pull/8062[#8074]: https://github.com/tokio-rs/tokio/pull/8074[#8075]: https://github.com/tokio-rs/tokio/pull/8075[#8076]: https://github.com/tokio-rs/tokio/pull/8076# 1.47.4 (April 2nd, 2026)### Fixed* sync: fix panic in `Chan::recv_many` when called with non-empty vector on closed channel ([#7991])[#7991]: https://github.com/tokio-rs/tokio/pull/7991# 1.47.3 (January 3rd, 2026)### Fixed* sync: return `TryRecvError::Disconnected` from `Receiver::try_recv` after `Receiver::close` ([#7686])# 1.47.2 (October 14th, 2025)### Fixed- runtime: use release ordering in `wake_by_ref()` even if already woken ([#7622])- sync: close the `broadcast::Sender` in `broadcast::Sender::new()` ([#7629])- macros: fix hygiene issue in `join!` and `try_join!` ([#7638])- process: fix error when runtime is shut down on nightly-2025-10-12 ([#7672])[#7622]: https://github.com/tokio-rs/tokio/pull/7622[#7629]: https://github.com/tokio-rs/tokio/pull/7629[#7638]: https://github.com/tokio-rs/tokio/pull/7638[#7672]: https://github.com/tokio-rs/tokio/pull/7672# 1.47.1 (August 1st, 2025)### Fixed- process: fix panic from spurious pidfd wakeup ([#7494])- sync: fix broken link of Python `asyncio.Event` in `SetOnce` docs ([#7485])[#7485]: https://github.com/tokio-rs/tokio/pull/7485# 1.47.0 (July 25th, 2025)This release adds `poll_proceed` and `cooperative` to the `coop` module forcooperative scheduling, adds `SetOnce` to the `sync` module which providessimilar functionality to [`std::sync::OnceLock`], and adds a new method`sync::Notify::notified_owned()` which returns an `OwnedNotified` withouta lifetime parameter.## Added- coop: add `cooperative` and `poll_proceed` ([#7405])- sync: add `SetOnce` ([#7418])- sync: add `sync::Notify::notified_owned()` ([#7465])## Changed- deps: upgrade windows-sys 0.52 → 0.59 ([#7117])- deps: update to socket2 v0.6 ([#7443])- sync: improve `AtomicWaker::wake` performance ([#7450])## Documented- metrics: fix listed feature requirements for some metrics ([#7449])- runtime: improve safety comments of `Readiness<'_>` ([#7415])[#7117]: https://github.com/tokio-rs/tokio/pull/7117[#7405]: https://github.com/tokio-rs/tokio/pull/7405[#7415]: https://github.com/tokio-rs/tokio/pull/7415[#7418]: https://github.com/tokio-rs/tokio/pull/7418[#7443]: https://github.com/tokio-rs/tokio/pull/7443[#7449]: https://github.com/tokio-rs/tokio/pull/7449[#7450]: https://github.com/tokio-rs/tokio/pull/7450[#7465]: https://github.com/tokio-rs/tokio/pull/7465# 1.46.1 (July 4th, 2025)This release fixes incorrect spawn locations in runtime task hooks for tasksspawned using `tokio::spawn` rather than `Runtime::spawn`. This issue onlyaffected the spawn location in `TaskMeta::spawned_at`, and did not affect tasklocations in Tracing events.## Unstable- runtime: add `TaskMeta::spawned_at` tracking where a task was spawned  ([#7440])[#7440]: https://github.com/tokio-rs/tokio/pull/7440# 1.46.0 (July 2nd, 2025)## Fixed- net: fixed `TcpStream::shutdown` incorrectly returning an error on macOS ([#7290])## Added- sync: `mpsc::OwnedPermit::{same_channel, same_channel_as_sender}` methods ([#7389])- macros: `biased` option for `join!` and `try_join!`, similar to `select!` ([#7307])- net: support for cygwin ([#7393])- net: support `pipe::OpenOptions::read_write` on Android ([#7426])- net: add `Clone` implementation for `net::unix::SocketAddr` ([#7422])## Changed- runtime: eliminate unnecessary lfence while operating on `queue::Local<T>` ([#7340])- task: disallow blocking in `LocalSet::{poll,drop}` ([#7372])## Unstable- runtime: add `TaskMeta::spawn_location` tracking where a task was spawned ([#7417])- runtime: removed borrow from `LocalOptions` parameter to `runtime::Builder::build_local` ([#7346])## Documented- io: clarify behavior of seeking when `start_seek` is not used ([#7366])- io: document cancellation safety of `AsyncWriteExt::flush` ([#7364])- net: fix docs for `recv_buffer_size` method ([#7336])- net: fix broken link of `RawFd` in `TcpSocket` docs ([#7416])- net: update `AsRawFd` doc link to current Rust stdlib location ([#7429])- readme: fix double period in reactor description ([#7363])- runtime: add doc note that `on_*_task_poll` is unstable ([#7311])- sync: update broadcast docs on allocation failure ([#7352])- time: add a missing panic scenario of `time::advance` ([#7394])[#7290]: https://github.com/tokio-rs/tokio/pull/7290[#7307]: https://github.com/tokio-rs/tokio/pull/7307[#7311]: https://github.com/tokio-rs/tokio/pull/7311[#7336]: https://github.com/tokio-rs/tokio/pull/7336[#7340]: https://github.com/tokio-rs/tokio/pull/7340[#7346]: https://github.com/tokio-rs/tokio/pull/7346[#7352]: https://github.com/tokio-rs/tokio/pull/7352[#7363]: https://github.com/tokio-rs/tokio/pull/7363[#7364]: https://github.com/tokio-rs/tokio/pull/7364[#7366]: https://github.com/tokio-rs/tokio/pull/7366[#7372]: https://github.com/tokio-rs/tokio/pull/7372[#7389]: https://github.com/tokio-rs/tokio/pull/7389[#7393]: https://github.com/tokio-rs/tokio/pull/7393[#7394]: https://github.com/tokio-rs/tokio/pull/7394[#7416]: https://github.com/tokio-rs/tokio/pull/7416[#7422]: https://github.com/tokio-rs/tokio/pull/7422[#7426]: https://github.com/tokio-rs/tokio/pull/7426[#7429]: https://github.com/tokio-rs/tokio/pull/7429[#7417]: https://github.com/tokio-rs/tokio/pull/7417# 1.45.1 (May 24th, 2025)This fixes a regression on the wasm32-unknown-unknown target, where code thatpreviously did not panic due to calls to `Instant::now()` started failing. Thisis due to the stabilization of the first time-based metric.### Fixed- Disable time-based metrics on wasm32-unknown-unknown ([#7322])[#7322]: https://github.com/tokio-rs/tokio/pull/7322# 1.45.0 (May 5th, 2025)### Added- metrics: stabilize `worker_total_busy_duration`, `worker_park_count`, and  `worker_unpark_count` ([#6899], [#7276])- process: add `Command::spawn_with` ([#7249])### Changed- io: do not require `Unpin` for some trait impls ([#7204])- rt: mark `runtime::Handle` as unwind safe ([#7230])- time: revert internal sharding implementation ([#7226])### Unstable- rt: remove alt multi-threaded runtime ([#7275])[#6899]: https://github.com/tokio-rs/tokio/pull/6899[#7276]: https://github.com/tokio-rs/tokio/pull/7276[#7249]: https://github.com/tokio-rs/tokio/pull/7249[#7204]: https://github.com/tokio-rs/tokio/pull/7204[#7230]: https://github.com/tokio-rs/tokio/pull/7230[#7226]: https://github.com/tokio-rs/tokio/pull/7226[#7275]: https://github.com/tokio-rs/tokio/pull/7275# 1.44.2 (April 5th, 2025)This release fixes a soundness issue in the broadcast channel. The channelaccepts values that are `Send` but `!Sync`. Previously, the channel called`clone()` on these values without synchronizing. This release fixes the channelby synchronizing calls to `.clone()` (Thanks Austin Bonander for finding andreporting the issue).### Fixed- sync: synchronize `clone()` call in broadcast channel ([#7232])[#7232]: https://github.com/tokio-rs/tokio/pull/7232# 1.44.1 (March 13th, 2025)### Fixed- rt: skip defer queue in `block_in_place` context ([#7216])[#7216]: https://github.com/tokio-rs/tokio/pull/7216# 1.44.0 (March 7th, 2025)This release changes the `from_std` method on sockets to panic if a blockingsocket is provided. We determined this change is not a breaking change as Tokio is notintended to operate using blocking sockets. Doing so results in runtime hangs andshould be considered a bug. Accidentally passing a blocking socket to Tokio is oneof the most common user mistakes. If this change causes an issue for you, pleasecomment on [#7172].### Added - coop: add `task::coop` module ([#7116]) - process: add `Command::get_kill_on_drop()` ([#7086]) - sync: add `broadcast::Sender::closed` ([#6685], [#7090]) - sync: add `broadcast::WeakSender` ([#7100]) - sync: add `oneshot::Receiver::is_empty()` ([#7153]) - sync: add `oneshot::Receiver::is_terminated()` ([#7152])### Fixed - fs: empty reads on `File` should not start a background read ([#7139]) - process: calling `start_kill` on exited child should not fail ([#7160]) - signal: fix `CTRL_CLOSE`, `CTRL_LOGOFF`, `CTRL_SHUTDOWN` on windows ([#7122]) - sync: properly handle panic during mpsc drop ([#7094])### Changes - runtime: clean up magic number in registration set ([#7112]) - coop: make coop yield using waker defer strategy ([#7185]) - macros: make `select!` budget-aware ([#7164]) - net: panic when passing a blocking socket to `from_std` ([#7166]) - io: clean up buffer casts ([#7142])### Changes to unstable APIs - rt: add before and after task poll callbacks ([#7120]) - tracing: make the task tracing API unstable public ([#6972])### Documented - docs: fix nesting of sections in top-level docs ([#7159]) - fs: rename symlink and hardlink parameter names ([#7143]) - io: swap reader/writer in simplex doc test ([#7176]) - macros: docs about `select!` alternatives ([#7110]) - net: rename the argument for `send_to` ([#7146]) - process: add example for reading `Child` stdout ([#7141]) - process: clarify `Child::kill` behavior ([#7162]) - process: fix grammar of the `ChildStdin` struct doc comment ([#7192]) - runtime: consistently use `worker_threads` instead of `core_threads` ([#7186])[#6685]: https://github.com/tokio-rs/tokio/pull/6685[#6972]: https://github.com/tokio-rs/tokio/pull/6972[#7086]: https://github.com/tokio-rs/tokio/pull/7086[#7090]: https://github.com/tokio-rs/tokio/pull/7090[#7094]: https://github.com/tokio-rs/tokio/pull/7094[#7100]: https://github.com/tokio-rs/tokio/pull/7100[#7110]: https://github.com/tokio-rs/tokio/pull/7110[#7112]: https://github.com/tokio-rs/tokio/pull/7112[#7116]: https://github.com/tokio-rs/tokio/pull/7116[#7120]: https://github.com/tokio-rs/tokio/pull/7120[#7122]: https://github.com/tokio-rs/tokio/pull/7122[#7139]: https://github.com/tokio-rs/tokio/pull/7139[#7141]: https://github.com/tokio-rs/tokio/pull/7141[#7142]: https://github.com/tokio-rs/tokio/pull/7142[#7143]: https://github.com/tokio-rs/tokio/pull/7143[#7146]: https://github.com/tokio-rs/tokio/pull/7146[#7152]: https://github.com/tokio-rs/tokio/pull/7152[#7153]: https://github.com/tokio-rs/tokio/pull/7153[#7159]: https://github.com/tokio-rs/tokio/pull/7159[#7160]: https://github.com/tokio-rs/tokio/pull/7160[#7162]: https://github.com/tokio-rs/tokio/pull/7162[#7164]: https://github.com/tokio-rs/tokio/pull/7164[#7166]: https://github.com/tokio-rs/tokio/pull/7166[#7172]: https://github.com/tokio-rs/tokio/pull/7172[#7176]: https://github.com/tokio-rs/tokio/pull/7176[#7185]: https://github.com/tokio-rs/tokio/pull/7185[#7186]: https://github.com/tokio-rs/tokio/pull/7186[#7192]: https://github.com/tokio-rs/tokio/pull/7192# 1.43.4 (January 3rd, 2026)### Fixed* sync: return `TryRecvError::Disconnected` from `Receiver::try_recv` after `Receiver::close` ([#7686])[#7686]: https://github.com/tokio-rs/tokio/pull/7686# 1.43.3 (October 14th, 2025)### Fixed- runtime: use release ordering in `wake_by_ref()` even if already woken ([#7622])- sync: close the `broadcast::Sender` in `broadcast::Sender::new()` ([#7629])- process: fix error when runtime is shut down on nightly-2025-10-12 ([#7672])[#7622]: https://github.com/tokio-rs/tokio/pull/7622[#7629]: https://github.com/tokio-rs/tokio/pull/7629[#7672]: https://github.com/tokio-rs/tokio/pull/7672# 1.43.2 (August 1st, 2025)### Fixed- process: fix panic from spurious pidfd wakeup ([#7494])[#7494]: https://github.com/tokio-rs/tokio/pull/7494# 1.43.1 (April 5th, 2025)This release fixes a soundness issue in the broadcast channel. The channelaccepts values that are `Send` but `!Sync`. Previously, the channel called`clone()` on these values without synchronizing. This release fixes the channelby synchronizing calls to `.clone()` (Thanks Austin Bonander for finding andreporting the issue).### Fixed- sync: synchronize `clone()` call in broadcast channel ([#7232])[#7232]: https://github.com/tokio-rs/tokio/pull/7232# 1.43.0 (Jan 8th, 2025)### Added- net: add `UdpSocket::peek` methods ([#7068])- net: add support for Haiku OS ([#7042])- process: add `Command::into_std()` ([#7014])- signal: add `SignalKind::info` on illumos ([#6995])- signal: add support for realtime signals on illumos ([#7029])### Fixed- io: don't call `set_len` before initializing vector in `Blocking` ([#7054])- macros: suppress `clippy::needless_return` in `#[tokio::main]` ([#6874])- runtime: fix thread parking on WebAssembly ([#7041])### Changes- chore: use unsync loads for `unsync_load` ([#7073])- io: use `Buf::put_bytes` in `Repeat` read impl ([#7055])- task: drop the join waker of a task eagerly ([#6986])### Changes to unstable APIs- metrics: improve flexibility of H2Histogram Configuration ([#6963])- taskdump: add accessor methods for backtrace ([#6975])### Documented- io: clarify `ReadBuf::uninit` allows initialized buffers as well ([#7053])- net: fix ambiguity in `TcpStream::try_write_vectored` docs ([#7067])- runtime: fix `LocalRuntime` doc links ([#7074])- sync: extend documentation for `watch::Receiver::wait_for` ([#7038])- sync: fix typos in `OnceCell` docs ([#7047])[#6874]: https://github.com/tokio-rs/tokio/pull/6874[#6963]: https://github.com/tokio-rs/tokio/pull/6963[#6975]: https://github.com/tokio-rs/tokio/pull/6975[#6986]: https://github.com/tokio-rs/tokio/pull/6986[#6995]: https://github.com/tokio-rs/tokio/pull/6995[#7014]: https://github.com/tokio-rs/tokio/pull/7014[#7029]: https://github.com/tokio-rs/tokio/pull/7029[#7038]: https://github.com/tokio-rs/tokio/pull/7038[#7041]: https://github.com/tokio-rs/tokio/pull/7041[#7042]: https://github.com/tokio-rs/tokio/pull/7042[#7047]: https://github.com/tokio-rs/tokio/pull/7047[#7053]: https://github.com/tokio-rs/tokio/pull/7053[#7054]: https://github.com/tokio-rs/tokio/pull/7054[#7055]: https://github.com/tokio-rs/tokio/pull/7055[#7067]: https://github.com/tokio-rs/tokio/pull/7067[#7068]: https://github.com/tokio-rs/tokio/pull/7068[#7073]: https://github.com/tokio-rs/tokio/pull/7073[#7074]: https://github.com/tokio-rs/tokio/pull/7074# 1.42.1 (April 8th, 2025)This release fixes a soundness issue in the broadcast channel. The channelaccepts values that are `Send` but `!Sync`. Previously, the channel called`clone()` on these values without synchronizing. This release fixes the channelby synchronizing calls to `.clone()` (Thanks Austin Bonander for finding andreporting the issue).### Fixed- sync: synchronize `clone()` call in broadcast channel ([#7232])[#7232]: https://github.com/tokio-rs/tokio/pull/7232# 1.42.0 (Dec 3rd, 2024)### Added- io: add `AsyncFd::{try_io, try_io_mut}` ([#6967])### Fixed- io: avoid `ptr->ref->ptr` roundtrip in RegistrationSet ([#6929])- runtime: do not defer `yield_now` inside `block_in_place` ([#6999])### Changes- io: simplify io readiness logic ([#6966])### Documented- net: fix docs for `tokio::net::unix::{pid_t, gid_t, uid_t}` ([#6791])- time: fix a typo in `Instant` docs ([#6982])[#6791]: https://github.com/tokio-rs/tokio/pull/6791[#6929]: https://github.com/tokio-rs/tokio/pull/6929[#6966]: https://github.com/tokio-rs/tokio/pull/6966[#6967]: https://github.com/tokio-rs/tokio/pull/6967[#6982]: https://github.com/tokio-rs/tokio/pull/6982[#6999]: https://github.com/tokio-rs/tokio/pull/6999# 1.41.1 (Nov 7th, 2024)### Fixed- metrics: fix bug with wrong number of buckets for the histogram ([#6957])- net: display `net` requirement for `net::UdpSocket` in docs ([#6938])- net: fix typo in `TcpStream` internal comment ([#6944])[#6957]: https://github.com/tokio-rs/tokio/pull/6957[#6938]: https://github.com/tokio-rs/tokio/pull/6938[#6944]: https://github.com/tokio-rs/tokio/pull/6944# 1.41.0 (Oct 22nd, 2024)### Added- metrics: stabilize `global_queue_depth` ([#6854], [#6918])- net: add conversions for unix `SocketAddr` ([#6868])- sync: add `watch::Sender::sender_count` ([#6836])- sync: add `mpsc::Receiver::blocking_recv_many` ([#6867])- task: stabilize `Id` apis ([#6793], [#6891])### Added (unstable)- metrics: add H2 Histogram option to improve histogram granularity ([#6897])- metrics: rename some histogram apis ([#6924])- runtime: add `LocalRuntime` ([#6808])### Changed- runtime: box futures larger than 16k on release mode ([#6826])- sync: add `#[must_use]` to `Notified` ([#6828])- sync: make `watch` cooperative ([#6846])- sync: make `broadcast::Receiver` cooperative ([#6870])- task: add task size to tracing instrumentation ([#6881])- wasm: enable `cfg_fs` for `wasi` target ([#6822])### Fixed- net: fix regression of abstract socket path in unix socket ([#6838])### Documented- io: recommend `OwnedFd` with `AsyncFd` ([#6821])- io: document cancel safety of `AsyncFd` methods ([#6890])- macros: render more comprehensible documentation for `join` and `try_join` ([#6814], [#6841])- net: fix swapped examples for `TcpSocket::set_nodelay` and `TcpSocket::nodelay` ([#6840])- sync: document runtime compatibility ([#6833])[#6793]: https://github.com/tokio-rs/tokio/pull/6793[#6808]: https://github.com/tokio-rs/tokio/pull/6808[#6810]: https://github.com/tokio-rs/tokio/pull/6810[#6814]: https://github.com/tokio-rs/tokio/pull/6814[#6821]: https://github.com/tokio-rs/tokio/pull/6821[#6822]: https://github.com/tokio-rs/tokio/pull/6822[#6826]: https://github.com/tokio-rs/tokio/pull/6826[#6828]: https://github.com/tokio-rs/tokio/pull/6828[#6833]: https://github.com/tokio-rs/tokio/pull/6833[#6836]: https://github.com/tokio-rs/tokio/pull/6836[#6838]: https://github.com/tokio-rs/tokio/pull/6838[#6840]: https://github.com/tokio-rs/tokio/pull/6840[#6841]: https://github.com/tokio-rs/tokio/pull/6841[#6846]: https://github.com/tokio-rs/tokio/pull/6846[#6854]: https://github.com/tokio-rs/tokio/pull/6854[#6867]: https://github.com/tokio-rs/tokio/pull/6867[#6868]: https://github.com/tokio-rs/tokio/pull/6868[#6870]: https://github.com/tokio-rs/tokio/pull/6870[#6881]: https://github.com/tokio-rs/tokio/pull/6881[#6890]: https://github.com/tokio-rs/tokio/pull/6890[#6891]: https://github.com/tokio-rs/tokio/pull/6891[#6897]: https://github.com/tokio-rs/tokio/pull/6897[#6918]: https://github.com/tokio-rs/tokio/pull/6918[#6924]: https://github.com/tokio-rs/tokio/pull/6924# 1.40.0 (August 30th, 2024)### Added- io: add `util::SimplexStream` ([#6589])- process: stabilize `Command::process_group` ([#6731])- sync: add `{TrySendError,SendTimeoutError}::into_inner` ([#6755])- task: add `JoinSet::join_all` ([#6784])### Added (unstable)- runtime: add `Builder::{on_task_spawn, on_task_terminate}` ([#6742])### Changed- io: use vectored io for `write_all_buf` when possible ([#6724])- runtime: prevent niche-optimization to avoid triggering miri ([#6744])- sync: mark mpsc types as `UnwindSafe` ([#6783])- sync,time: make `Sleep` and `BatchSemaphore` instrumentation explicit roots ([#6727])- task: use `NonZeroU64` for `task::Id` ([#6733])- task: include panic message when printing `JoinError` ([#6753])- task: add `#[must_use]` to `JoinHandle::abort_handle` ([#6762])- time: eliminate timer wheel allocations ([#6779])### Documented- docs: clarify that `[build]` section doesn't go in Cargo.toml ([#6728])- io: clarify zero remaining capacity case ([#6790])- macros: improve documentation for `select!` ([#6774])- sync: document mpsc channel allocation behavior ([#6773])[#6589]: https://github.com/tokio-rs/tokio/pull/6589[#6724]: https://github.com/tokio-rs/tokio/pull/6724[#6727]: https://github.com/tokio-rs/tokio/pull/6727[#6728]: https://github.com/tokio-rs/tokio/pull/6728[#6731]: https://github.com/tokio-rs/tokio/pull/6731[#6733]: https://github.com/tokio-rs/tokio/pull/6733[#6742]: https://github.com/tokio-rs/tokio/pull/6742[#6744]: https://github.com/tokio-rs/tokio/pull/6744[#6753]: https://github.com/tokio-rs/tokio/pull/6753[#6755]: https://github.com/tokio-rs/tokio/pull/6755[#6762]: https://github.com/tokio-rs/tokio/pull/6762[#6773]: https://github.com/tokio-rs/tokio/pull/6773[#6774]: https://github.com/tokio-rs/tokio/pull/6774[#6779]: https://github.com/tokio-rs/tokio/pull/6779[#6783]: https://github.com/tokio-rs/tokio/pull/6783[#6784]: https://github.com/tokio-rs/tokio/pull/6784[#6790]: https://github.com/tokio-rs/tokio/pull/6790# 1.39.3 (August 17th, 2024)This release fixes a regression where the unix socket api stopped acceptingthe abstract socket namespace. ([#6772])[#6772]: https://github.com/tokio-rs/tokio/pull/6772# 1.39.2 (July 27th, 2024)This release fixes a regression where the `select!` macro stopped acceptingexpressions that make use of temporary lifetime extension. ([#6722])[#6722]: https://github.com/tokio-rs/tokio/pull/6722# 1.39.1 (July 23rd, 2024)This release reverts "time: avoid traversing entries in the time wheel twice"because it contains a bug. ([#6715])[#6715]: https://github.com/tokio-rs/tokio/pull/6715# 1.39.0 (July 23rd, 2024)Yanked. Please use 1.39.1 instead.- This release bumps the MSRV to 1.70. ([#6645])- This release upgrades to mio v1. ([#6635])- This release upgrades to windows-sys v0.52 ([#6154])### Added- io: implement `AsyncSeek` for `Empty` ([#6663])- metrics: stabilize `num_alive_tasks` ([#6619], [#6667])- process: add `Command::as_std_mut` ([#6608])- sync: add `watch::Sender::same_channel` ([#6637])- sync: add `{Receiver,UnboundedReceiver}::{sender_strong_count,sender_weak_count}` ([#6661])- sync: implement `Default` for `watch::Sender` ([#6626])- task: implement `Clone` for `AbortHandle` ([#6621])- task: stabilize `consume_budget` ([#6622])### Changed- io: improve panic message of `ReadBuf::put_slice()` ([#6629])- io: read during write in `copy_bidirectional` and `copy` ([#6532])- runtime: replace `num_cpus` with `available_parallelism` ([#6709])- task: avoid stack overflow when passing large future to `block_on` ([#6692])- time: avoid traversing entries in the time wheel twice ([#6584])- time: support `IntoFuture` with `timeout` ([#6666])- macros: support `IntoFuture` with `join!` and `select!` ([#6710])### Fixed- docs: fix docsrs builds with the fs feature enabled ([#6585])- io: only use short-read optimization on known-to-be-compatible platforms ([#6668])- time: fix overflow panic when using large durations with `Interval` ([#6612])### Added (unstable)- macros: allow `unhandled_panic` behavior for `#[tokio::main]` and `#[tokio::test]` ([#6593])- metrics: add `spawned_tasks_count` ([#6114])- metrics: add `worker_park_unpark_count` ([#6696])- metrics: add worker thread id ([#6695])### Documented- io: update `tokio::io::stdout` documentation ([#6674])- macros: typo fix in `join.rs` and `try_join.rs` ([#6641])- runtime: fix typo in `unhandled_panic` ([#6660])- task: document behavior of `JoinSet::try_join_next` when all tasks are running ([#6671])[#6114]: https://github.com/tokio-rs/tokio/pull/6114[#6154]: https://github.com/tokio-rs/tokio/pull/6154[#6532]: https://github.com/tokio-rs/tokio/pull/6532[#6584]: https://github.com/tokio-rs/tokio/pull/6584[#6585]: https://github.com/tokio-rs/tokio/pull/6585[#6593]: https://github.com/tokio-rs/tokio/pull/6593[#6608]: https://github.com/tokio-rs/tokio/pull/6608[#6612]: https://github.com/tokio-rs/tokio/pull/6612[#6619]: https://github.com/tokio-rs/tokio/pull/6619[#6621]: https://github.com/tokio-rs/tokio/pull/6621[#6622]: https://github.com/tokio-rs/tokio/pull/6622[#6626]: https://github.com/tokio-rs/tokio/pull/6626[#6629]: https://github.com/tokio-rs/tokio/pull/6629[#6635]: https://github.com/tokio-rs/tokio/pull/6635[#6637]: https://github.com/tokio-rs/tokio/pull/6637[#6641]: https://github.com/tokio-rs/tokio/pull/6641[#6645]: https://github.com/tokio-rs/tokio/pull/6645[#6660]: https://github.com/tokio-rs/tokio/pull/6660[#6661]: https://github.com/tokio-rs/tokio/pull/6661[#6663]: https://github.com/tokio-rs/tokio/pull/6663[#6666]: https://github.com/tokio-rs/tokio/pull/6666[#6667]: https://github.com/tokio-rs/tokio/pull/6667[#6668]: https://github.com/tokio-rs/tokio/pull/6668[#6671]: https://github.com/tokio-rs/tokio/pull/6671[#6674]: https://github.com/tokio-rs/tokio/pull/6674[#6692]: https://github.com/tokio-rs/tokio/pull/6692[#6695]: https://github.com/tokio-rs/tokio/pull/6695[#6696]: https://github.com/tokio-rs/tokio/pull/6696[#6709]: https://github.com/tokio-rs/tokio/pull/6709[#6710]: https://github.com/tokio-rs/tokio/pull/6710# 1.38.2 (April 2nd, 2025)This release fixes a soundness issue in the broadcast channel. The channelaccepts values that are `Send` but `!Sync`. Previously, the channel called`clone()` on these values without synchronizing. This release fixes the channelby synchronizing calls to `.clone()` (Thanks Austin Bonander for finding andreporting the issue).### Fixed- sync: synchronize `clone()` call in broadcast channel ([#7232])[#7232]: https://github.com/tokio-rs/tokio/pull/7232# 1.38.1 (July 16th, 2024)This release fixes the bug identified as ([#6682]), which caused timers notto fire when they should.### Fixed- time: update `wake_up` while holding all the locks of sharded time wheels ([#6683])[#6682]: https://github.com/tokio-rs/tokio/pull/6682[#6683]: https://github.com/tokio-rs/tokio/pull/6683# 1.38.0 (May 30th, 2024)This release marks the beginning of stabilization for runtime metrics. Itstabilizes `RuntimeMetrics::worker_count`. Future releases will continue tostabilize more metrics.### Added- fs: add `File::create_new` ([#6573])- io: add `copy_bidirectional_with_sizes` ([#6500])- io: implement `AsyncBufRead` for `Join` ([#6449])- net: add Apple visionOS support ([#6465])- net: implement `Clone` for `NamedPipeInfo` ([#6586])- net: support QNX OS ([#6421])- sync: add `Notify::notify_last` ([#6520])- sync: add `mpsc::Receiver::{capacity,max_capacity}` ([#6511])- sync: add `split` method to the semaphore permit ([#6472], [#6478])- task: add `tokio::task::join_set::Builder::spawn_blocking` ([#6578])- wasm: support rt-multi-thread with wasm32-wasi-preview1-threads ([#6510])### Changed- macros: make `#[tokio::test]` append `#[test]` at the end of the attribute list ([#6497])- metrics: fix `blocking_threads` count ([#6551])- metrics: stabilize `RuntimeMetrics::worker_count` ([#6556])- runtime: move task out of the `lifo_slot` in `block_in_place` ([#6596])- runtime: panic if `global_queue_interval` is zero ([#6445])- sync: always drop message in destructor for oneshot receiver ([#6558])- sync: instrument `Semaphore` for task dumps ([#6499])- sync: use FIFO ordering when waking batches of wakers ([#6521])- task: make `LocalKey::get` work with Clone types ([#6433])- tests: update nix and mio-aio dev-dependencies ([#6552])- time: clean up implementation ([#6517])- time: lazily init timers on first poll ([#6512])- time: remove the `true_when` field in `TimerShared` ([#6563])- time: use sharding for timer implementation ([#6534])### Fixed- taskdump: allow building taskdump docs on non-unix machines ([#6564])- time: check for overflow in `Interval::poll_tick` ([#6487])- sync: fix incorrect `is_empty` on mpsc block boundaries ([#6603])### Documented- fs: rewrite file system docs ([#6467])- io: fix `stdin` documentation ([#6581])- io: fix obsolete reference in `ReadHalf::unsplit()` documentation ([#6498])- macros: render more comprehensible documentation for `select!` ([#6468])- net: add missing types to module docs ([#6482])- net: fix misleading `NamedPipeServer` example ([#6590])- sync: add examples for `SemaphorePermit`, `OwnedSemaphorePermit` ([#6477])- sync: document that `Barrier::wait` is not cancel safe ([#6494])- sync: explain relation between `watch::Sender::{subscribe,closed}` ([#6490])- task: clarify that you can't abort `spawn_blocking` tasks ([#6571])- task: fix a typo in doc of `LocalSet::run_until` ([#6599])- time: fix test-util requirement for pause and resume in docs ([#6503])[#6421]: https://github.com/tokio-rs/tokio/pull/6421[#6433]: https://github.com/tokio-rs/tokio/pull/6433[#6445]: https://github.com/tokio-rs/tokio/pull/6445[#6449]: https://github.com/tokio-rs/tokio/pull/6449[#6465]: https://github.com/tokio-rs/tokio/pull/6465[#6467]: https://github.com/tokio-rs/tokio/pull/6467[#6468]: https://github.com/tokio-rs/tokio/pull/6468[#6472]: https://github.com/tokio-rs/tokio/pull/6472[#6477]: https://github.com/tokio-rs/tokio/pull/6477[#6478]: https://github.com/tokio-rs/tokio/pull/6478[#6482]: https://github.com/tokio-rs/tokio/pull/6482[#6487]: https://github.com/tokio-rs/tokio/pull/6487[#6490]: https://github.com/tokio-rs/tokio/pull/6490[#6494]: https://github.com/tokio-rs/tokio/pull/6494[#6497]: https://github.com/tokio-rs/tokio/pull/6497[#6498]: https://github.com/tokio-rs/tokio/pull/6498[#6499]: https://github.com/tokio-rs/tokio/pull/6499[#6500]: https://github.com/tokio-rs/tokio/pull/6500[#6503]: https://github.com/tokio-rs/tokio/pull/6503[#6510]: https://github.com/tokio-rs/tokio/pull/6510[#6511]: https://github.com/tokio-rs/tokio/pull/6511[#6512]: https://github.com/tokio-rs/tokio/pull/6512[#6517]: https://github.com/tokio-rs/tokio/pull/6517[#6520]: https://github.com/tokio-rs/tokio/pull/6520[#6521]: https://github.com/tokio-rs/tokio/pull/6521[#6534]: https://github.com/tokio-rs/tokio/pull/6534[#6551]: https://github.com/tokio-rs/tokio/pull/6551[#6552]: https://github.com/tokio-rs/tokio/pull/6552[#6556]: https://github.com/tokio-rs/tokio/pull/6556[#6558]: https://github.com/tokio-rs/tokio/pull/6558[#6563]: https://github.com/tokio-rs/tokio/pull/6563[#6564]: https://github.com/tokio-rs/tokio/pull/6564[#6571]: https://github.com/tokio-rs/tokio/pull/6571[#6573]: https://github.com/tokio-rs/tokio/pull/6573[#6578]: https://github.com/tokio-rs/tokio/pull/6578[#6581]: https://github.com/tokio-rs/tokio/pull/6581[#6586]: https://github.com/tokio-rs/tokio/pull/6586[#6590]: https://github.com/tokio-rs/tokio/pull/6590[#6596]: https://github.com/tokio-rs/tokio/pull/6596[#6599]: https://github.com/tokio-rs/tokio/pull/6599[#6603]: https://github.com/tokio-rs/tokio/pull/6603# 1.37.0 (March 28th, 2024)### Added- fs: add `set_max_buf_size` to `tokio::fs::File` ([#6411])- io: add `try_new` and `try_with_interest` to `AsyncFd` ([#6345])- sync: add `forget_permits` method to semaphore ([#6331])- sync: add `is_closed`, `is_empty`, and `len` to mpsc receivers ([#6348])- sync: add a `rwlock()` method to owned `RwLock` guards ([#6418])- sync: expose strong and weak counts of mpsc sender handles ([#6405])- sync: implement `Clone` for `watch::Sender` ([#6388])- task: add `TaskLocalFuture::take_value` ([#6340])- task: implement `FromIterator` for `JoinSet` ([#6300])### Changed- io: make `io::split` use a mutex instead of a spinlock ([#6403])### Fixed- docs: fix docsrs build without net feature ([#6360])- macros: allow select with only else branch ([#6339])- runtime: fix leaking registration entries when os registration fails ([#6329])### Documented- io: document cancel safety of `AsyncBufReadExt::fill_buf` ([#6431])- io: document cancel safety of `AsyncReadExt`'s primitive read functions ([#6337])- runtime: add doc link from `Runtime` to `#[tokio::main]` ([#6366])- runtime: make the `enter` example deterministic ([#6351])- sync: add Semaphore example for limiting the number of outgoing requests ([#6419])- sync: fix missing period in broadcast docs ([#6377])- sync: mark `mpsc::Sender::downgrade` with `#[must_use]` ([#6326])- sync: reorder `const_new` before `new_with` ([#6392])- sync: update watch channel docs ([#6395])- task: fix documentation links ([#6336])### Changed (unstable)- runtime: include task `Id` in taskdumps ([#6328])- runtime: panic if `unhandled_panic` is enabled when not supported ([#6410])[#6300]: https://github.com/tokio-rs/tokio/pull/6300[#6326]: https://github.com/tokio-rs/tokio/pull/6326[#6328]: https://github.com/tokio-rs/tokio/pull/6328[#6329]: https://github.com/tokio-rs/tokio/pull/6329[#6331]: https://github.com/tokio-rs/tokio/pull/6331[#6336]: https://github.com/tokio-rs/tokio/pull/6336[#6337]: https://github.com/tokio-rs/tokio/pull/6337[#6339]: https://github.com/tokio-rs/tokio/pull/6339[#6340]: https://github.com/tokio-rs/tokio/pull/6340[#6345]: https://github.com/tokio-rs/tokio/pull/6345[#6348]: https://github.com/tokio-rs/tokio/pull/6348[#6351]: https://github.com/tokio-rs/tokio/pull/6351[#6360]: https://github.com/tokio-rs/tokio/pull/6360[#6366]: https://github.com/tokio-rs/tokio/pull/6366[#6377]: https://github.com/tokio-rs/tokio/pull/6377[#6388]: https://github.com/tokio-rs/tokio/pull/6388[#6392]: https://github.com/tokio-rs/tokio/pull/6392[#6395]: https://github.com/tokio-rs/tokio/pull/6395[#6403]: https://github.com/tokio-rs/tokio/pull/6403[#6405]: https://github.com/tokio-rs/tokio/pull/6405[#6410]: https://github.com/tokio-rs/tokio/pull/6410[#6411]: https://github.com/tokio-rs/tokio/pull/6411[#6418]: https://github.com/tokio-rs/tokio/pull/6418[#6419]: https://github.com/tokio-rs/tokio/pull/6419[#6431]: https://github.com/tokio-rs/tokio/pull/6431# 1.36.0 (February 2nd, 2024)### Added- io: add `tokio::io::Join` ([#6220])- io: implement `AsyncWrite` for `Empty` ([#6235])- net: add support for anonymous unix pipes ([#6127])- net: add `UnixSocket` ([#6290])- net: expose keepalive option on `TcpSocket` ([#6311])- sync: add `{Receiver,UnboundedReceiver}::poll_recv_many` ([#6236])- sync: add `Sender::{try_,}reserve_many` ([#6205])- sync: add `watch::Receiver::mark_unchanged` ([#6252])- task: add `JoinSet::try_join_next` ([#6280])### Changed- io: make `copy` cooperative ([#6265])- io: make `repeat` and `sink` cooperative ([#6254])- io: simplify check for empty slice ([#6293])- process: use pidfd on Linux when available ([#6152])- sync: use AtomicBool in broadcast channel future ([#6298])### Documented- io: clarify `clear_ready` docs ([#6304])- net: document that `*Fd` traits on `TcpSocket` are unix-only ([#6294])- sync: document FIFO behavior of `tokio::sync::Mutex` ([#6279])- chore: typographic improvements ([#6262])- runtime: remove obsolete comment ([#6303])- task: fix typo ([#6261])[#6220]: https://github.com/tokio-rs/tokio/pull/6220[#6235]: https://github.com/tokio-rs/tokio/pull/6235[#6127]: https://github.com/tokio-rs/tokio/pull/6127[#6290]: https://github.com/tokio-rs/tokio/pull/6290[#6311]: https://github.com/tokio-rs/tokio/pull/6311[#6236]: https://github.com/tokio-rs/tokio/pull/6236[#6205]: https://github.com/tokio-rs/tokio/pull/6205[#6252]: https://github.com/tokio-rs/tokio/pull/6252[#6280]: https://github.com/tokio-rs/tokio/pull/6280[#6265]: https://github.com/tokio-rs/tokio/pull/6265[#6254]: https://github.com/tokio-rs/tokio/pull/6254[#6293]: https://github.com/tokio-rs/tokio/pull/6293[#6238]: https://github.com/tokio-rs/tokio/pull/6238[#6152]: https://github.com/tokio-rs/tokio/pull/6152[#6298]: https://github.com/tokio-rs/tokio/pull/6298[#6262]: https://github.com/tokio-rs/tokio/pull/6262[#6303]: https://github.com/tokio-rs/tokio/pull/6303[#6261]: https://github.com/tokio-rs/tokio/pull/6261[#6304]: https://github.com/tokio-rs/tokio/pull/6304[#6294]: https://github.com/tokio-rs/tokio/pull/6294[#6279]: https://github.com/tokio-rs/tokio/pull/6279# 1.35.1 (December 19, 2023)This is a forward part of a change that was backported to 1.25.3.### Fixed- io: add budgeting to `tokio::runtime::io::registration::async_io` ([#6221])[#6221]: https://github.com/tokio-rs/tokio/pull/6221# 1.35.0 (December 8th, 2023)### Added- net: add Apple watchOS support ([#6176])### Changed- io: drop the `Sized` requirements from `AsyncReadExt.read_buf` ([#6169])- runtime: make `Runtime` unwind safe ([#6189])- runtime: reduce the lock contention in task spawn ([#6001])- tokio: update nix dependency to 0.27.1 ([#6190])### Fixed- chore: make `--cfg docsrs` work without net feature ([#6166])- chore: use relaxed load for `unsync_load` on miri ([#6179])- runtime: handle missing context on wake ([#6148])- taskdump: fix taskdump cargo config example ([#6150])- taskdump: skip notified tasks during taskdumps ([#6194])- tracing: avoid creating resource spans with current parent, use a None parent instead ([#6107])- tracing: make task span explicit root ([#6158])### Documented- io: flush in `AsyncWriteExt` examples ([#6149])- runtime: document fairness guarantees and current behavior ([#6145])- task: document cancel safety of `LocalSet::run_until` ([#6147])[#6001]: https://github.com/tokio-rs/tokio/pull/6001[#6107]: https://github.com/tokio-rs/tokio/pull/6107[#6144]: https://github.com/tokio-rs/tokio/pull/6144[#6145]: https://github.com/tokio-rs/tokio/pull/6145[#6147]: https://github.com/tokio-rs/tokio/pull/6147[#6148]: https://github.com/tokio-rs/tokio/pull/6148[#6149]: https://github.com/tokio-rs/tokio/pull/6149[#6150]: https://github.com/tokio-rs/tokio/pull/6150[#6158]: https://github.com/tokio-rs/tokio/pull/6158[#6166]: https://github.com/tokio-rs/tokio/pull/6166[#6169]: https://github.com/tokio-rs/tokio/pull/6169[#6176]: https://github.com/tokio-rs/tokio/pull/6176[#6179]: https://github.com/tokio-rs/tokio/pull/6179[#6189]: https://github.com/tokio-rs/tokio/pull/6189[#6190]: https://github.com/tokio-rs/tokio/pull/6190[#6194]: https://github.com/tokio-rs/tokio/pull/6194# 1.34.0 (November 19th, 2023)### Fixed- io: allow `clear_readiness` after io driver shutdown ([#6067])- io: fix integer overflow in `take` ([#6080])- io: fix I/O resource hang ([#6134])- sync: fix `broadcast::channel` link ([#6100])### Changed- macros: use `::core` qualified imports instead of `::std` inside `tokio::test` macro ([#5973])### Added- fs: update cfg attr in `fs::read_dir` to include `aix` ([#6075])- sync: add `mpsc::Receiver::recv_many` ([#6010])- tokio: added vita target support ([#6094])[#5973]: https://github.com/tokio-rs/tokio/pull/5973[#6067]: https://github.com/tokio-rs/tokio/pull/6067[#6080]: https://github.com/tokio-rs/tokio/pull/6080[#6134]: https://github.com/tokio-rs/tokio/pull/6134[#6100]: https://github.com/tokio-rs/tokio/pull/6100[#6075]: https://github.com/tokio-rs/tokio/pull/6075[#6010]: https://github.com/tokio-rs/tokio/pull/6010[#6094]: https://github.com/tokio-rs/tokio/pull/6094# 1.33.0 (October 9, 2023)### Fixed- io: mark `Interest::add` with `#[must_use]` ([#6037])- runtime: fix cache line size for RISC-V ([#5994])- sync: prevent lock poisoning in `watch::Receiver::wait_for` ([#6021])- task: fix `spawn_local` source location ([#5984])### Changed- sync: use Acquire/Release orderings instead of SeqCst in `watch` ([#6018])### Added- fs: add vectored writes to `tokio::fs::File` ([#5958])- io: add `Interest::remove` method ([#5906])- io: add vectored writes to `DuplexStream` ([#5985])- net: add Apple tvOS support ([#6045])- sync: add `?Sized` bound to `{MutexGuard,OwnedMutexGuard}::map` ([#5997])- sync: add `watch::Receiver::mark_unseen` ([#5962], [#6014], [#6017])- sync: add `watch::Sender::new` ([#5998])- sync: add const fn `OnceCell::from_value` ([#5903])### Removed- remove unused `stats` feature ([#5952])### Documented- add missing backticks in code examples ([#5938], [#6056])- fix typos ([#5988], [#6030])- process: document that `Child::wait` is cancel safe ([#5977])- sync: add examples for `Semaphore` ([#5939], [#5956], [#5978], [#6031], [#6032], [#6050])- sync: document that `broadcast` capacity is a lower bound ([#6042])- sync: document that `const_new` is not instrumented ([#6002])- sync: improve cancel-safety documentation for `mpsc::Sender::send` ([#5947])- sync: improve docs for `watch` channel ([#5954])- taskdump: render taskdump documentation on docs.rs ([#5972])### Unstable- taskdump: fix potential deadlock ([#6036])[#5903]: https://github.com/tokio-rs/tokio/pull/5903[#5906]: https://github.com/tokio-rs/tokio/pull/5906[#5938]: https://github.com/tokio-rs/tokio/pull/5938[#5939]: https://github.com/tokio-rs/tokio/pull/5939[#5947]: https://github.com/tokio-rs/tokio/pull/5947[#5952]: https://github.com/tokio-rs/tokio/pull/5952[#5954]: https://github.com/tokio-rs/tokio/pull/5954[#5956]: https://github.com/tokio-rs/tokio/pull/5956[#5958]: https://github.com/tokio-rs/tokio/pull/5958[#5960]: https://github.com/tokio-rs/tokio/pull/5960[#5962]: https://github.com/tokio-rs/tokio/pull/5962[#5971]: https://github.com/tokio-rs/tokio/pull/5971[#5972]: https://github.com/tokio-rs/tokio/pull/5972[#5977]: https://github.com/tokio-rs/tokio/pull/5977[#5978]: https://github.com/tokio-rs/tokio/pull/5978[#5984]: https://github.com/tokio-rs/tokio/pull/5984[#5985]: https://github.com/tokio-rs/tokio/pull/5985[#5988]: https://github.com/tokio-rs/tokio/pull/5988[#5994]: https://github.com/tokio-rs/tokio/pull/5994[#5997]: https://github.com/tokio-rs/tokio/pull/5997[#5998]: https://github.com/tokio-rs/tokio/pull/5998[#6002]: https://github.com/tokio-rs/tokio/pull/6002[#6014]: https://github.com/tokio-rs/tokio/pull/6014[#6017]: https://github.com/tokio-rs/tokio/pull/6017[#6018]: https://github.com/tokio-rs/tokio/pull/6018[#6021]: https://github.com/tokio-rs/tokio/pull/6021[#6030]: https://github.com/tokio-rs/tokio/pull/6030[#6031]: https://github.com/tokio-rs/tokio/pull/6031[#6032]: https://github.com/tokio-rs/tokio/pull/6032[#6036]: https://github.com/tokio-rs/tokio/pull/6036[#6037]: https://github.com/tokio-rs/tokio/pull/6037[#6042]: https://github.com/tokio-rs/tokio/pull/6042[#6045]: https://github.com/tokio-rs/tokio/pull/6045[#6050]: https://github.com/tokio-rs/tokio/pull/6050[#6056]: https://github.com/tokio-rs/tokio/pull/6056[#6058]: https://github.com/tokio-rs/tokio/pull/6058# 1.32.1 (December 19, 2023)This is a forward part of a change that was backported to 1.25.3.### Fixed- io: add budgeting to `tokio::runtime::io::registration::async_io` ([#6221])[#6221]: https://github.com/tokio-rs/tokio/pull/6221# 1.32.0 (August 16, 2023)### Fixed- sync: fix potential quadratic behavior in `broadcast::Receiver` ([#5925])### Added- process: stabilize `Command::raw_arg` ([#5930])- io: enable awaiting error readiness ([#5781])### Unstable- rt(alt): improve scalability of alt runtime as the number of cores grows ([#5935])[#5925]: https://github.com/tokio-rs/tokio/pull/5925[#5930]: https://github.com/tokio-rs/tokio/pull/5930[#5781]: https://github.com/tokio-rs/tokio/pull/5781[#5935]: https://github.com/tokio-rs/tokio/pull/5935# 1.31.0 (August 10, 2023)### Fixed* io: delegate `WriteHalf::poll_write_vectored` ([#5914])### Unstable* rt(alt): fix memory leak in unstable next-gen scheduler prototype ([#5911])* rt: expose mean task poll time metric ([#5927])[#5914]: https://github.com/tokio-rs/tokio/pull/5914[#5911]: https://github.com/tokio-rs/tokio/pull/5911[#5927]: https://github.com/tokio-rs/tokio/pull/5927# 1.30.0 (August 9, 2023)This release bumps the MSRV of Tokio to 1.63. ([#5887])### Changed- tokio: reduce LLVM code generation ([#5859])- io: support `--cfg mio_unsupported_force_poll_poll` flag ([#5881])- sync: make `const_new` methods always available ([#5885])- sync: avoid false sharing in mpsc channel ([#5829])- rt: pop at least one task from inject queue ([#5908])### Added- sync: add `broadcast::Sender::new` ([#5824])- net: implement `UCred` for espidf ([#5868])- fs: add `File::options()` ([#5869])- time: implement extra reset variants for `Interval` ([#5878])- process: add `{ChildStd*}::into_owned_{fd, handle}` ([#5899])### Removed- tokio: removed unused `tokio_*` cfgs ([#5890])- remove build script to speed up compilation ([#5887])### Documented- sync: mention lagging in docs for `broadcast::send` ([#5820])- runtime: expand on sharing runtime docs ([#5858])- io: use vec in example for `AsyncReadExt::read_exact` ([#5863])- time: mark `Sleep` as `!Unpin` in docs ([#5916])- process: fix `raw_arg` not showing up in docs ([#5865])### Unstable- rt: add runtime ID ([#5864])- rt: initial implementation of new threaded runtime ([#5823])[#5820]: https://github.com/tokio-rs/tokio/pull/5820[#5823]: https://github.com/tokio-rs/tokio/pull/5823[#5824]: https://github.com/tokio-rs/tokio/pull/5824[#5829]: https://github.com/tokio-rs/tokio/pull/5829[#5858]: https://github.com/tokio-rs/tokio/pull/5858[#5859]: https://github.com/tokio-rs/tokio/pull/5859[#5863]: https://github.com/tokio-rs/tokio/pull/5863[#5864]: https://github.com/tokio-rs/tokio/pull/5864[#5865]: https://github.com/tokio-rs/tokio/pull/5865[#5868]: https://github.com/tokio-rs/tokio/pull/5868[#5869]: https://github.com/tokio-rs/tokio/pull/5869[#5878]: https://github.com/tokio-rs/tokio/pull/5878[#5881]: https://github.com/tokio-rs/tokio/pull/5881[#5885]: https://github.com/tokio-rs/tokio/pull/5885[#5887]: https://github.com/tokio-rs/tokio/pull/5887[#5890]: https://github.com/tokio-rs/tokio/pull/5890[#5899]: https://github.com/tokio-rs/tokio/pull/5899[#5908]: https://github.com/tokio-rs/tokio/pull/5908[#5916]: https://github.com/tokio-rs/tokio/pull/5916# 1.29.1 (June 29, 2023)### Fixed- rt: fix nesting two `block_in_place` with a `block_on` between ([#5837])[#5837]: https://github.com/tokio-rs/tokio/pull/5837# 1.29.0 (June 27, 2023)Technically a breaking change, the `Send` implementation is removed from`runtime::EnterGuard`. This change fixes a bug and should not impact most users.### Breaking- rt: `EnterGuard` should not be `Send` ([#5766])### Fixed- fs: reduce blocking ops in `fs::read_dir` ([#5653])- rt: fix possible starvation ([#5686], [#5712])- rt: fix stacked borrows issue in `JoinSet` ([#5693])- rt: panic if `EnterGuard` dropped incorrect order ([#5772])- time: do not overflow to signal value ([#5710])- fs: wait for in-flight ops before cloning `File` ([#5803])### Changed- rt: reduce time to poll tasks scheduled from outside the runtime ([#5705], [#5720])### Added- net: add uds doc alias for unix sockets ([#5659])- rt: add metric for number of tasks ([#5628])- sync: implement more traits for channel errors ([#5666])- net: add nodelay methods on TcpSocket ([#5672])- sync: add `broadcast::Receiver::blocking_recv` ([#5690])- process: add `raw_arg` method to `Command` ([#5704])- io: support PRIORITY epoll events ([#5566])- task: add `JoinSet::poll_join_next` ([#5721])- net: add support for Redox OS ([#5790])### Unstable- rt: add the ability to dump task backtraces ([#5608], [#5676], [#5708], [#5717])- rt: instrument task poll times with a histogram ([#5685])[#5766]: https://github.com/tokio-rs/tokio/pull/5766[#5653]: https://github.com/tokio-rs/tokio/pull/5653[#5686]: https://github.com/tokio-rs/tokio/pull/5686[#5712]: https://github.com/tokio-rs/tokio/pull/5712[#5693]: https://github.com/tokio-rs/tokio/pull/5693[#5772]: https://github.com/tokio-rs/tokio/pull/5772[#5710]: https://github.com/tokio-rs/tokio/pull/5710[#5803]: https://github.com/tokio-rs/tokio/pull/5803[#5705]: https://github.com/tokio-rs/tokio/pull/5705[#5720]: https://github.com/tokio-rs/tokio/pull/5720[#5659]: https://github.com/tokio-rs/tokio/pull/5659[#5628]: https://github.com/tokio-rs/tokio/pull/5628[#5666]: https://github.com/tokio-rs/tokio/pull/5666[#5672]: https://github.com/tokio-rs/tokio/pull/5672[#5690]: https://github.com/tokio-rs/tokio/pull/5690[#5704]: https://github.com/tokio-rs/tokio/pull/5704[#5566]: https://github.com/tokio-rs/tokio/pull/5566[#5721]: https://github.com/tokio-rs/tokio/pull/5721[#5790]: https://github.com/tokio-rs/tokio/pull/5790[#5608]: https://github.com/tokio-rs/tokio/pull/5608[#5676]: https://github.com/tokio-rs/tokio/pull/5676[#5708]: https://github.com/tokio-rs/tokio/pull/5708[#5717]: https://github.com/tokio-rs/tokio/pull/5717[#5685]: https://github.com/tokio-rs/tokio/pull/5685# 1.28.2 (May 28, 2023)Forward ports 1.18.6 changes.### Fixed- deps: disable default features for mio ([#5728])[#5728]: https://github.com/tokio-rs/tokio/pull/5728# 1.28.1 (May 10th, 2023)This release fixes a mistake in the build script that makes `AsFd`implementations unavailable on Rust 1.63. ([#5677])[#5677]: https://github.com/tokio-rs/tokio/pull/5677# 1.28.0 (April 25th, 2023)### Added- io: add `AsyncFd::async_io` ([#5542])- io: impl BufMut for ReadBuf ([#5590])- net: add `recv_buf` for `UdpSocket` and `UnixDatagram` ([#5583])- sync: add `OwnedSemaphorePermit::semaphore` ([#5618])- sync: add `same_channel` to broadcast channel ([#5607])- sync: add `watch::Receiver::wait_for` ([#5611])- task: add `JoinSet::spawn_blocking` and `JoinSet::spawn_blocking_on` ([#5612])### Changed- deps: update windows-sys to 0.48 ([#5591])- io: make `read_to_end` not grow unnecessarily ([#5610])- macros: make entrypoints more efficient ([#5621])- sync: improve Debug impl for `RwLock` ([#5647])- sync: reduce contention in `Notify` ([#5503])### Fixed- net: support `get_peer_cred` on AIX ([#5065])- sync: avoid deadlocks in `broadcast` with custom wakers ([#5578])### Documented- sync: fix typo in `Semaphore::MAX_PERMITS` ([#5645])- sync: fix typo in `tokio::sync::watch::Sender` docs ([#5587])[#5065]: https://github.com/tokio-rs/tokio/pull/5065[#5503]: https://github.com/tokio-rs/tokio/pull/5503[#5542]: https://github.com/tokio-rs/tokio/pull/5542[#5578]: https://github.com/tokio-rs/tokio/pull/5578[#5583]: https://github.com/tokio-rs/tokio/pull/5583[#5587]: https://github.com/tokio-rs/tokio/pull/5587[#5590]: https://github.com/tokio-rs/tokio/pull/5590[#5591]: https://github.com/tokio-rs/tokio/pull/5591[#5607]: https://github.com/tokio-rs/tokio/pull/5607[#5610]: https://github.com/tokio-rs/tokio/pull/5610[#5611]: https://github.com/tokio-rs/tokio/pull/5611[#5612]: https://github.com/tokio-rs/tokio/pull/5612[#5618]: https://github.com/tokio-rs/tokio/pull/5618[#5621]: https://github.com/tokio-rs/tokio/pull/5621[#5645]: https://github.com/tokio-rs/tokio/pull/5645[#5647]: https://github.com/tokio-rs/tokio/pull/5647# 1.27.0 (March 27th, 2023)This release bumps the MSRV of Tokio to 1.56. ([#5559])### Added- io: add `async_io` helper method to sockets ([#5512])- io: add implementations of `AsFd`/`AsHandle`/`AsSocket` ([#5514], [#5540])- net: add `UdpSocket::peek_sender()` ([#5520])- sync: add `RwLockWriteGuard::{downgrade_map, try_downgrade_map}` ([#5527])- task: add `JoinHandle::abort_handle` ([#5543])### Changed- io: use `memchr` from `libc` ([#5558])- macros: accept path as crate rename in `#[tokio::main]` ([#5557])- macros: update to syn 2.0.0 ([#5572])- time: don't register for a wakeup when `Interval` returns `Ready` ([#5553])### Fixed- fs: fuse std iterator in `ReadDir` ([#5555])- tracing: fix `spawn_blocking` location fields ([#5573])- time: clean up redundant check in `Wheel::poll()` ([#5574])### Documented- macros: define cancellation safety ([#5525])- io: add details to docs of `tokio::io::copy[_buf]` ([#5575])- io: refer to `ReaderStream` and `StreamReader` in module docs ([#5576])[#5512]: https://github.com/tokio-rs/tokio/pull/5512[#5514]: https://github.com/tokio-rs/tokio/pull/5514[#5520]: https://github.com/tokio-rs/tokio/pull/5520[#5525]: https://github.com/tokio-rs/tokio/pull/5525[#5527]: https://github.com/tokio-rs/tokio/pull/5527[#5540]: https://github.com/tokio-rs/tokio/pull/5540[#5543]: https://github.com/tokio-rs/tokio/pull/5543[#5553]: https://github.com/tokio-rs/tokio/pull/5553[#5555]: https://github.com/tokio-rs/tokio/pull/5555[#5557]: https://github.com/tokio-rs/tokio/pull/5557[#5558]: https://github.com/tokio-rs/tokio/pull/5558[#5559]: https://github.com/tokio-rs/tokio/pull/5559[#5572]: https://github.com/tokio-rs/tokio/pull/5572[#5573]: https://github.com/tokio-rs/tokio/pull/5573[#5574]: https://github.com/tokio-rs/tokio/pull/5574[#5575]: https://github.com/tokio-rs/tokio/pull/5575[#5576]: https://github.com/tokio-rs/tokio/pull/5576# 1.26.0 (March 1st, 2023)### Fixed- macros: fix empty `join!` and `try_join!` ([#5504])- sync: don't leak tracing spans in mutex guards ([#5469])- sync: drop wakers after unlocking the mutex in Notify ([#5471])- sync: drop wakers outside lock in semaphore ([#5475])### Added- fs: add `fs::try_exists` ([#4299])- net: add types for named unix pipes ([#5351])- sync: add `MappedOwnedMutexGuard` ([#5474])### Changed- chore: update windows-sys to 0.45 ([#5386])- net: use Message Read Mode for named pipes ([#5350])- sync: mark lock guards with `#[clippy::has_significant_drop]` ([#5422])- sync: reduce contention in watch channel ([#5464])- time: remove cache padding in timer entries ([#5468])- time: Improve `Instant::now()` perf with test-util ([#5513])### Internal Changes- io: use `poll_fn` in `copy_bidirectional` ([#5486])- net: refactor named pipe builders to not use bitfields ([#5477])- rt: remove Arc from Clock ([#5434])- sync: make `notify_waiters` calls atomic ([#5458])- time: don't store deadline twice in sleep entries ([#5410])### Unstable- metrics: add a new metric for budget exhaustion yields ([#5517])### Documented- io: improve AsyncFd example ([#5481])- runtime: document the nature of the main future ([#5494])- runtime: remove extra period in docs ([#5511])- signal: updated Documentation for Signals ([#5459])- sync: add doc aliases for `blocking_*` methods ([#5448])- sync: fix docs for Send/Sync bounds in broadcast ([#5480])- sync: document drop behavior for channels ([#5497])- task: clarify what happens to spawned work during runtime shutdown ([#5394])- task: clarify `process::Command` docs ([#5413])- task: fix wording with 'unsend' ([#5452])- time: document immediate completion guarantee for timeouts ([#5509])- tokio: document supported platforms ([#5483])[#4299]: https://github.com/tokio-rs/tokio/pull/4299[#5350]: https://github.com/tokio-rs/tokio/pull/5350[#5351]: https://github.com/tokio-rs/tokio/pull/5351[#5386]: https://github.com/tokio-rs/tokio/pull/5386[#5394]: https://github.com/tokio-rs/tokio/pull/5394[#5410]: https://github.com/tokio-rs/tokio/pull/5410[#5413]: https://github.com/tokio-rs/tokio/pull/5413[#5422]: https://github.com/tokio-rs/tokio/pull/5422[#5434]: https://github.com/tokio-rs/tokio/pull/5434[#5448]: https://github.com/tokio-rs/tokio/pull/5448[#5452]: https://github.com/tokio-rs/tokio/pull/5452[#5458]: https://github.com/tokio-rs/tokio/pull/5458[#5459]: https://github.com/tokio-rs/tokio/pull/5459[#5464]: https://github.com/tokio-rs/tokio/pull/5464[#5468]: https://github.com/tokio-rs/tokio/pull/5468[#5469]: https://github.com/tokio-rs/tokio/pull/5469[#5471]: https://github.com/tokio-rs/tokio/pull/5471[#5474]: https://github.com/tokio-rs/tokio/pull/5474[#5475]: https://github.com/tokio-rs/tokio/pull/5475[#5477]: https://github.com/tokio-rs/tokio/pull/5477[#5480]: https://github.com/tokio-rs/tokio/pull/5480[#5481]: https://github.com/tokio-rs/tokio/pull/5481[#5483]: https://github.com/tokio-rs/tokio/pull/5483[#5486]: https://github.com/tokio-rs/tokio/pull/5486[#5494]: https://github.com/tokio-rs/tokio/pull/5494[#5497]: https://github.com/tokio-rs/tokio/pull/5497[#5504]: https://github.com/tokio-rs/tokio/pull/5504[#5509]: https://github.com/tokio-rs/tokio/pull/5509[#5511]: https://github.com/tokio-rs/tokio/pull/5511[#5513]: https://github.com/tokio-rs/tokio/pull/5513[#5517]: https://github.com/tokio-rs/tokio/pull/5517# 1.25.3 (December 17th, 2023)### Fixed- io: add budgeting to `tokio::runtime::io::registration::async_io` ([#6221])[#6221]: https://github.com/tokio-rs/tokio/pull/6221# 1.25.2 (September 22, 2023)Forward ports 1.20.6 changes.### Changed- io: use `memchr` from `libc` ([#5960])[#5960]: https://github.com/tokio-rs/tokio/pull/5960# 1.25.1 (May 28, 2023)Forward ports 1.18.6 changes.### Fixed- deps: disable default features for mio ([#5728])[#5728]: https://github.com/tokio-rs/tokio/pull/5728# 1.25.0 (January 28, 2023)### Fixed- rt: fix runtime metrics reporting ([#5330])### Added- sync: add `broadcast::Sender::len` ([#5343])### Changed- fs: increase maximum read buffer size to 2MiB ([#5397])[#5330]: https://github.com/tokio-rs/tokio/pull/5330[#5343]: https://github.com/tokio-rs/tokio/pull/5343[#5397]: https://github.com/tokio-rs/tokio/pull/5397# 1.24.2 (January 17, 2023)Forward ports 1.18.5 changes.### Fixed- io: fix unsoundness in `ReadHalf::unsplit` ([#5375])[#5375]: https://github.com/tokio-rs/tokio/pull/5375# 1.24.1 (January 6, 2022)This release fixes a compilation failure on targets without `AtomicU64` when using rustc older than 1.63. ([#5356])[#5356]: https://github.com/tokio-rs/tokio/pull/5356# 1.24.0 (January 5, 2022)### Fixed - rt: improve native `AtomicU64` support detection ([#5284])### Added - rt: add configuration option for max number of I/O events polled from the OS   per tick ([#5186]) - rt: add an environment variable for configuring the default number of worker   threads per runtime instance ([#4250])### Changed - sync: reduce MPSC channel stack usage ([#5294]) - io: reduce lock contention in I/O operations  ([#5300]) - fs: speed up `read_dir()` by chunking operations ([#5309]) - rt: use internal `ThreadId` implementation ([#5329]) - test: don't auto-advance time when a `spawn_blocking` task is running ([#5115])[#5186]: https://github.com/tokio-rs/tokio/pull/5186[#5294]: https://github.com/tokio-rs/tokio/pull/5294[#5284]: https://github.com/tokio-rs/tokio/pull/5284[#4250]: https://github.com/tokio-rs/tokio/pull/4250[#5300]: https://github.com/tokio-rs/tokio/pull/5300[#5329]: https://github.com/tokio-rs/tokio/pull/5329[#5115]: https://github.com/tokio-rs/tokio/pull/5115[#5309]: https://github.com/tokio-rs/tokio/pull/5309# 1.23.1 (January 4, 2022)This release forward ports changes from 1.18.4.### Fixed- net: fix Windows named pipe server builder to maintain option when toggling  pipe mode ([#5336]).[#5336]: https://github.com/tokio-rs/tokio/pull/5336# 1.23.0 (December 5, 2022)### Fixed - net: fix Windows named pipe connect ([#5208]) - io: support vectored writes for `ChildStdin` ([#5216]) - io: fix `async fn ready()` false positive for OS-specific events ([#5231]) ### Changed - runtime: `yield_now` defers task until after driver poll ([#5223]) - runtime: reduce amount of codegen needed per spawned task ([#5213]) - windows: replace `winapi` dependency with `windows-sys` ([#5204]) [#5208]: https://github.com/tokio-rs/tokio/pull/5208 [#5216]: https://github.com/tokio-rs/tokio/pull/5216 [#5213]: https://github.com/tokio-rs/tokio/pull/5213 [#5204]: https://github.com/tokio-rs/tokio/pull/5204 [#5223]: https://github.com/tokio-rs/tokio/pull/5223 [#5231]: https://github.com/tokio-rs/tokio/pull/5231# 1.22.0 (November 17, 2022)### Added - runtime: add `Handle::runtime_flavor` ([#5138]) - sync: add `Mutex::blocking_lock_owned` ([#5130]) - sync: add `Semaphore::MAX_PERMITS` ([#5144]) - sync: add `merge()` to semaphore permits ([#4948]) - sync: add `mpsc::WeakUnboundedSender` ([#5189])### Added (unstable) - process: add `Command::process_group` ([#5114]) - runtime: export metrics about the blocking thread pool ([#5161]) - task: add `task::id()` and `task::try_id()` ([#5171])### Fixed - macros: don't take ownership of futures in macros ([#5087]) - runtime: fix Stacked Borrows violation in `LocalOwnedTasks` ([#5099]) - runtime: mitigate ABA with 32-bit queue indices when possible ([#5042]) - task: wake local tasks to the local queue when woken by the same thread ([#5095]) - time: panic in release mode when `mark_pending` called illegally ([#5093]) - runtime: fix typo in expect message ([#5169]) - runtime: fix `unsync_load` on atomic types ([#5175]) - task: elaborate safety comments in task deallocation ([#5172]) - runtime: fix `LocalSet` drop in thread local ([#5179]) - net: remove libc type leakage in a public API ([#5191]) - runtime: update the alignment of `CachePadded` ([#5106])### Changed - io: make `tokio::io::copy` continue filling the buffer when writer stalls ([#5066]) - runtime: remove `coop::budget` from `LocalSet::run_until` ([#5155]) - sync: make `Notify` panic safe ([#5154])### Documented - io: fix doc for `write_i8` to use signed integers ([#5040]) - net: fix doc typos for TCP and UDP `set_tos` methods ([#5073]) - net: fix function name in `UdpSocket::recv` documentation ([#5150]) - sync: typo in `TryLockError` for `RwLock::try_write` ([#5160]) - task: document that spawned tasks execute immediately ([#5117]) - time: document return type of `timeout` ([#5118]) - time: document that `timeout` checks only before poll ([#5126]) - sync: specify return type of `oneshot::Receiver` in docs ([#5198])### Internal changes - runtime: use const `Mutex::new` for globals ([#5061]) - runtime: remove `Option` around `mio::Events` in io driver ([#5078]) - runtime: remove a conditional compilation clause ([#5104]) - runtime: remove a reference to internal time handle ([#5107]) - runtime: misc time driver cleanup ([#5120]) - runtime: move signal driver to runtime module ([#5121]) - runtime: signal driver now uses I/O driver directly ([#5125]) - runtime: start decoupling I/O driver and I/O handle ([#5127]) - runtime: switch `io::handle` refs with scheduler:Handle ([#5128]) - runtime: remove Arc from I/O driver ([#5134]) - runtime: use signal driver handle via `scheduler::Handle` ([#5135]) - runtime: move internal clock fns out of context ([#5139]) - runtime: remove `runtime::context` module ([#5140]) - runtime: keep driver cfgs in `driver.rs` ([#5141]) - runtime: add `runtime::context` to unify thread-locals ([#5143]) - runtime: rename some confusing internal variables/fns ([#5151]) - runtime: move `coop` mod into `runtime` ([#5152]) - runtime: move budget state to context thread-local ([#5157]) - runtime: move park logic into runtime module ([#5158]) - runtime: move `Runtime` into its own file ([#5159]) - runtime: unify entering a runtime with `Handle::enter` ([#5163]) - runtime: remove handle reference from each scheduler ([#5166]) - runtime: move `enter` into `context` ([#5167]) - runtime: combine context and entered thread-locals ([#5168]) - runtime: fix accidental unsetting of current handle ([#5178]) - runtime: move `CoreStage` methods to `Core` ([#5182]) - sync: name mpsc semaphore types ([#5146])[#4948]: https://github.com/tokio-rs/tokio/pull/4948[#5040]: https://github.com/tokio-rs/tokio/pull/5040[#5042]: https://github.com/tokio-rs/tokio/pull/5042[#5061]: https://github.com/tokio-rs/tokio/pull/5061[#5066]: https://github.com/tokio-rs/tokio/pull/5066[#5073]: https://github.com/tokio-rs/tokio/pull/5073[#5078]: https://github.com/tokio-rs/tokio/pull/5078[#5087]: https://github.com/tokio-rs/tokio/pull/5087[#5093]: https://github.com/tokio-rs/tokio/pull/5093[#5095]: https://github.com/tokio-rs/tokio/pull/5095[#5099]: https://github.com/tokio-rs/tokio/pull/5099[#5104]: https://github.com/tokio-rs/tokio/pull/5104[#5106]: https://github.com/tokio-rs/tokio/pull/5106[#5107]: https://github.com/tokio-rs/tokio/pull/5107[#5114]: https://github.com/tokio-rs/tokio/pull/5114[#5117]: https://github.com/tokio-rs/tokio/pull/5117[#5118]: https://github.com/tokio-rs/tokio/pull/5118[#5120]: https://github.com/tokio-rs/tokio/pull/5120[#5121]: https://github.com/tokio-rs/tokio/pull/5121[#5125]: https://github.com/tokio-rs/tokio/pull/5125[#5126]: https://github.com/tokio-rs/tokio/pull/5126[#5127]: https://github.com/tokio-rs/tokio/pull/5127[#5128]: https://github.com/tokio-rs/tokio/pull/5128[#5130]: https://github.com/tokio-rs/tokio/pull/5130[#5134]: https://github.com/tokio-rs/tokio/pull/5134[#5135]: https://github.com/tokio-rs/tokio/pull/5135[#5138]: https://github.com/tokio-rs/tokio/pull/5138[#5138]: https://github.com/tokio-rs/tokio/pull/5138[#5139]: https://github.com/tokio-rs/tokio/pull/5139[#5140]: https://github.com/tokio-rs/tokio/pull/5140[#5141]: https://github.com/tokio-rs/tokio/pull/5141[#5143]: https://github.com/tokio-rs/tokio/pull/5143[#5144]: https://github.com/tokio-rs/tokio/pull/5144[#5144]: https://github.com/tokio-rs/tokio/pull/5144[#5146]: https://github.com/tokio-rs/tokio/pull/5146[#5150]: https://github.com/tokio-rs/tokio/pull/5150[#5151]: https://github.com/tokio-rs/tokio/pull/5151[#5152]: https://github.com/tokio-rs/tokio/pull/5152[#5154]: https://github.com/tokio-rs/tokio/pull/5154[#5155]: https://github.com/tokio-rs/tokio/pull/5155[#5157]: https://github.com/tokio-rs/tokio/pull/5157[#5158]: https://github.com/tokio-rs/tokio/pull/5158[#5159]: https://github.com/tokio-rs/tokio/pull/5159[#5160]: https://github.com/tokio-rs/tokio/pull/5160[#5161]: https://github.com/tokio-rs/tokio/pull/5161[#5163]: https://github.com/tokio-rs/tokio/pull/5163[#5166]: https://github.com/tokio-rs/tokio/pull/5166[#5167]: https://github.com/tokio-rs/tokio/pull/5167[#5168]: https://github.com/tokio-rs/tokio/pull/5168[#5169]: https://github.com/tokio-rs/tokio/pull/5169[#5171]: https://github.com/tokio-rs/tokio/pull/5171[#5172]: https://github.com/tokio-rs/tokio/pull/5172[#5175]: https://github.com/tokio-rs/tokio/pull/5175[#5178]: https://github.com/tokio-rs/tokio/pull/5178[#5179]: https://github.com/tokio-rs/tokio/pull/5179[#5182]: https://github.com/tokio-rs/tokio/pull/5182[#5189]: https://github.com/tokio-rs/tokio/pull/5189[#5191]: https://github.com/tokio-rs/tokio/pull/5191[#5198]: https://github.com/tokio-rs/tokio/pull/5198# 1.21.2 (September 27, 2022)This release removes the dependency on the `once_cell` crate to restore the MSRVof 1.21.x, which is the latest minor version at the time of release. ([#5048])[#5048]: https://github.com/tokio-rs/tokio/pull/5048# 1.21.1 (September 13, 2022)### Fixed- net: fix dependency resolution for socket2 ([#5000])- task: ignore failure to set TLS in `LocalSet` Drop ([#4976])[#4976]: https://github.com/tokio-rs/tokio/pull/4976[#5000]: https://github.com/tokio-rs/tokio/pull/5000# 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 thewasm32-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# 1.20.6 (September 22, 2023)This is a backport of a change from 1.27.0.### Changed- io: use `memchr` from `libc` ([#5960])[#5960]: https://github.com/tokio-rs/tokio/pull/5960# 1.20.5 (May 28, 2023)Forward ports 1.18.6 changes.### Fixed- deps: disable default features for mio ([#5728])[#5728]: https://github.com/tokio-rs/tokio/pull/5728# 1.20.4 (January 17, 2023)Forward ports 1.18.5 changes.### Fixed- io: fix unsoundness in `ReadHalf::unsplit` ([#5375])[#5375]: https://github.com/tokio-rs/tokio/pull/5375# 1.20.3 (January 3, 2022)This release forward ports changes from 1.18.4.### Fixed- net: fix Windows named pipe server builder to maintain option when toggling  pipe mode ([#5336]).[#5336]: https://github.com/tokio-rs/tokio/pull/5336# 1.20.2 (September 27, 2022)This release removes the dependency on the `once_cell` crate to restore the MSRVof the 1.20.x LTS release. ([#5048])[#5048]: https://github.com/tokio-rs/tokio/pull/5048# 1.20.1 (July 25, 2022)### Fixed- chore: fix version detection in build script ([#4860])[#4860]: https://github.com/tokio-rs/tokio/pull/4860# 1.20.0 (July 12, 2022)### Added- tokio: add `track_caller` to public APIs ([#4772], [#4791], [#4793], [#4806], [#4808])- sync: Add `has_changed` method to `watch::Ref` ([#4758])### Changed- time: remove `src/time/driver/wheel/stack.rs` ([#4766])- rt: clean up arguments passed to basic scheduler ([#4767])- net: be more specific about winapi features ([#4764])- tokio: use const initialized thread locals where possible ([#4677])- task: various small improvements to LocalKey ([#4795])### Documented- fs: warn about performance pitfall ([#4762])- chore: fix spelling ([#4769])- sync: document spurious failures in oneshot ([#4777])- sync: add warning for watch in non-Send futures ([#4741])- chore: fix typo ([#4798])### Unstable- joinset: rename `join_one` to `join_next` ([#4755])- rt: unhandled panic config for current thread rt ([#4770])[#4677]: https://github.com/tokio-rs/tokio/pull/4677[#4741]: https://github.com/tokio-rs/tokio/pull/4741[#4755]: https://github.com/tokio-rs/tokio/pull/4755[#4758]: https://github.com/tokio-rs/tokio/pull/4758[#4762]: https://github.com/tokio-rs/tokio/pull/4762[#4764]: https://github.com/tokio-rs/tokio/pull/4764[#4766]: https://github.com/tokio-rs/tokio/pull/4766[#4767]: https://github.com/tokio-rs/tokio/pull/4767[#4769]: https://github.com/tokio-rs/tokio/pull/4769[#4770]: https://github.com/tokio-rs/tokio/pull/4770[#4772]: https://github.com/tokio-rs/tokio/pull/4772[#4777]: https://github.com/tokio-rs/tokio/pull/4777[#4791]: https://github.com/tokio-rs/tokio/pull/4791[#4793]: https://github.com/tokio-rs/tokio/pull/4793[#4795]: https://github.com/tokio-rs/tokio/pull/4795[#4798]: https://github.com/tokio-rs/tokio/pull/4798[#4806]: https://github.com/tokio-rs/tokio/pull/4806[#4808]: https://github.com/tokio-rs/tokio/pull/4808# 1.19.2 (June 6, 2022)This release fixes another bug in `Notified::enable`. ([#4751])[#4751]: https://github.com/tokio-rs/tokio/pull/4751# 1.19.1 (June 5, 2022)This release fixes a bug in `Notified::enable`. ([#4747])[#4747]: https://github.com/tokio-rs/tokio/pull/4747# 1.19.0 (June 3, 2022)### Added- runtime: add `is_finished` method for `JoinHandle` and `AbortHandle` ([#4709])- runtime: make global queue and event polling intervals configurable ([#4671])- sync: add `Notified::enable` ([#4705])- sync: add `watch::Sender::send_if_modified` ([#4591])- sync: add resubscribe method to broadcast::Receiver ([#4607])- net: add `take_error` to `TcpSocket` and `TcpStream` ([#4739])### Changed- io: refactor out usage of Weak in the io handle ([#4656])### Fixed- macros: avoid starvation in `join!` and `try_join!` ([#4624])### Documented- runtime: clarify semantics of tasks outliving `block_on` ([#4729])- time: fix example for `MissedTickBehavior::Burst` ([#4713])### Unstable- metrics: correctly update atomics in `IoDriverMetrics` ([#4725])- metrics: fix compilation with unstable, process, and rt, but without net ([#4682])- task: add `#[track_caller]` to `JoinSet`/`JoinMap` ([#4697])- task: add `Builder::{spawn_on, spawn_local_on, spawn_blocking_on}` ([#4683])- task: add `consume_budget` for cooperative scheduling ([#4498])- task: add `join_set::Builder` for configuring `JoinSet` tasks ([#4687])- task: update return value of `JoinSet::join_one` ([#4726])[#4498]: https://github.com/tokio-rs/tokio/pull/4498[#4591]: https://github.com/tokio-rs/tokio/pull/4591[#4607]: https://github.com/tokio-rs/tokio/pull/4607[#4624]: https://github.com/tokio-rs/tokio/pull/4624[#4656]: https://github.com/tokio-rs/tokio/pull/4656[#4671]: https://github.com/tokio-rs/tokio/pull/4671[#4682]: https://github.com/tokio-rs/tokio/pull/4682[#4683]: https://github.com/tokio-rs/tokio/pull/4683[#4687]: https://github.com/tokio-rs/tokio/pull/4687[#4697]: https://github.com/tokio-rs/tokio/pull/4697[#4705]: https://github.com/tokio-rs/tokio/pull/4705[#4709]: https://github.com/tokio-rs/tokio/pull/4709[#4713]: https://github.com/tokio-rs/tokio/pull/4713[#4725]: https://github.com/tokio-rs/tokio/pull/4725[#4726]: https://github.com/tokio-rs/tokio/pull/4726[#4729]: https://github.com/tokio-rs/tokio/pull/4729[#4739]: https://github.com/tokio-rs/tokio/pull/4739# 1.18.6 (May 28, 2023)### Fixed- deps: disable default features for mio ([#5728])[#5728]: https://github.com/tokio-rs/tokio/pull/5728# 1.18.5 (January 17, 2023)### Fixed- io: fix unsoundness in `ReadHalf::unsplit` ([#5375])[#5375]: https://github.com/tokio-rs/tokio/pull/5375# 1.18.4 (January 3, 2022)### Fixed- net: fix Windows named pipe server builder to maintain option when toggling  pipe mode ([#5336]).[#5336]: https://github.com/tokio-rs/tokio/pull/5336# 1.18.3 (September 27, 2022)This release removes the dependency on the `once_cell` crate to restore the MSRVof the 1.18.x LTS release. ([#5048])[#5048]: https://github.com/tokio-rs/tokio/pull/5048# 1.18.2 (May 5, 2022)Add missing features for the `winapi` dependency. ([#4663])[#4663]: https://github.com/tokio-rs/tokio/pull/4663# 1.18.1 (May 2, 2022)The 1.18.0 release broke the build for targets without 64-bit atomics whenbuilding with `tokio_unstable`. This release fixes that. ([#4649])[#4649]: https://github.com/tokio-rs/tokio/pull/4649# 1.18.0 (April 27, 2022)This release adds a number of new APIs in `tokio::net`, `tokio::signal`, and`tokio::sync`. In addition, it adds new unstable APIs to `tokio::task` (`Id`sfor uniquely identifying a task, and `AbortHandle` for remotely cancelling atask), as well as a number of bugfixes.### Fixed- blocking: add missing `#[track_caller]` for `spawn_blocking` ([#4616])- macros: fix `select` macro to process 64 branches ([#4519])- net: fix `try_io` methods not calling Mio's `try_io` internally ([#4582])- runtime: recover when OS fails to spawn a new thread ([#4485])### Added- net: add `UdpSocket::peer_addr` ([#4611])- net: add `try_read_buf` method for named pipes ([#4626])- signal: add `SignalKind` `Hash`/`Eq` impls and `c_int` conversion ([#4540])- signal: add support for signals up to `SIGRTMAX` ([#4555])- sync: add `watch::Sender::send_modify` method ([#4310])- sync: add `broadcast::Receiver::len` method ([#4542])- sync: add `watch::Receiver::same_channel` method ([#4581])- sync: implement `Clone` for `RecvError` types ([#4560])### Changed- update `mio` to 0.8.1 ([#4582])- macros: rename `tokio::select!`'s internal `util` module ([#4543])- runtime: use `Vec::with_capacity` when building runtime ([#4553])### Documented- improve docs for `tokio_unstable` ([#4524])- runtime: include more documentation for thread_pool/worker ([#4511])- runtime: update `Handle::current`'s docs to mention `EnterGuard` ([#4567])- time: clarify platform specific timer resolution ([#4474])- signal: document that `Signal::recv` is cancel-safe ([#4634])- sync: `UnboundedReceiver` close docs ([#4548])### UnstableThe following changes only apply when building with `--cfg tokio_unstable`:- task: add `task::Id` type ([#4630])- task: add `AbortHandle` type for cancelling tasks in a `JoinSet` ([#4530],  [#4640])- task: fix missing `doc(cfg(...))` attributes for `JoinSet` ([#4531])- task: fix broken link in `AbortHandle` RustDoc ([#4545])- metrics: add initial IO driver metrics ([#4507])[#4616]: https://github.com/tokio-rs/tokio/pull/4616[#4519]: https://github.com/tokio-rs/tokio/pull/4519[#4582]: https://github.com/tokio-rs/tokio/pull/4582[#4485]: https://github.com/tokio-rs/tokio/pull/4485[#4613]: https://github.com/tokio-rs/tokio/pull/4613[#4611]: https://github.com/tokio-rs/tokio/pull/4611[#4626]: https://github.com/tokio-rs/tokio/pull/4626[#4540]: https://github.com/tokio-rs/tokio/pull/4540[#4555]: https://github.com/tokio-rs/tokio/pull/4555[#4310]: https://github.com/tokio-rs/tokio/pull/4310[#4542]: https://github.com/tokio-rs/tokio/pull/4542[#4581]: https://github.com/tokio-rs/tokio/pull/4581[#4560]: https://github.com/tokio-rs/tokio/pull/4560[#4631]: https://github.com/tokio-rs/tokio/pull/4631[#4582]: https://github.com/tokio-rs/tokio/pull/4582[#4543]: https://github.com/tokio-rs/tokio/pull/4543[#4553]: https://github.com/tokio-rs/tokio/pull/4553[#4524]: https://github.com/tokio-rs/tokio/pull/4524[#4511]: https://github.com/tokio-rs/tokio/pull/4511[#4567]: https://github.com/tokio-rs/tokio/pull/4567[#4474]: https://github.com/tokio-rs/tokio/pull/4474[#4634]: https://github.com/tokio-rs/tokio/pull/4634[#4548]: https://github.com/tokio-rs/tokio/pull/4548[#4630]: https://github.com/tokio-rs/tokio/pull/4630[#4530]: https://github.com/tokio-rs/tokio/pull/4530[#4640]: https://github.com/tokio-rs/tokio/pull/4640[#4531]: https://github.com/tokio-rs/tokio/pull/4531[#4545]: https://github.com/tokio-rs/tokio/pull/4545[#4507]: https://github.com/tokio-rs/tokio/pull/4507# 1.17.0 (February 16, 2022)This release updates the minimum supported Rust version (MSRV) to 1.49, the`mio` dependency to v0.8, and the (optional) `parking_lot` dependency to v0.12.Additionally, it contains several bug fixes, as well as internal refactoring andperformance improvements.### Fixed- time: prevent panicking in `sleep` with large durations ([#4495])- time: eliminate potential panics in `Instant` arithmetic on platforms where  `Instant::now` is not monotonic ([#4461])- io: fix `DuplexStream` not participating in cooperative yielding ([#4478])- rt: fix potential double panic when dropping a `JoinHandle` ([#4430])### Changed- update minimum supported Rust version to 1.49 ([#4457])- update `parking_lot` dependency to v0.12.0 ([#4459])- update `mio` dependency to v0.8 ([#4449])- rt: remove an unnecessary lock in the blocking pool ([#4436])- rt: remove an unnecessary enum in the basic scheduler ([#4462])- time: use bit manipulation instead of modulo to improve performance ([#4480])- net: use `std::future::Ready` instead of our own `Ready` future ([#4271])- replace deprecated `atomic::spin_loop_hint` with `hint::spin_loop` ([#4491])- fix miri failures in intrusive linked lists ([#4397])### Documented- io: add an example for `tokio::process::ChildStdin` ([#4479])### UnstableThe following changes only apply when building with `--cfg tokio_unstable`:- task: fix missing location information in `tracing` spans generated by  `spawn_local` ([#4483])- task: add `JoinSet` for managing sets of tasks ([#4335])- metrics: fix compilation error on MIPS ([#4475])- metrics: fix compilation error on arm32v7 ([#4453])[#4495]: https://github.com/tokio-rs/tokio/pull/4495[#4461]: https://github.com/tokio-rs/tokio/pull/4461[#4478]: https://github.com/tokio-rs/tokio/pull/4478[#4430]: https://github.com/tokio-rs/tokio/pull/4430[#4457]: https://github.com/tokio-rs/tokio/pull/4457[#4459]: https://github.com/tokio-rs/tokio/pull/4459[#4449]: https://github.com/tokio-rs/tokio/pull/4449[#4462]: https://github.com/tokio-rs/tokio/pull/4462[#4436]: https://github.com/tokio-rs/tokio/pull/4436[#4480]: https://github.com/tokio-rs/tokio/pull/4480[#4271]: https://github.com/tokio-rs/tokio/pull/4271[#4491]: https://github.com/tokio-rs/tokio/pull/4491[#4397]: https://github.com/tokio-rs/tokio/pull/4397[#4479]: https://github.com/tokio-rs/tokio/pull/4479[#4483]: https://github.com/tokio-rs/tokio/pull/4483[#4335]: https://github.com/tokio-rs/tokio/pull/4335[#4475]: https://github.com/tokio-rs/tokio/pull/4475[#4453]: https://github.com/tokio-rs/tokio/pull/4453# 1.16.1 (January 28, 2022)This release fixes a bug in [#4428] with the change [#4437].[#4428]: https://github.com/tokio-rs/tokio/pull/4428[#4437]: https://github.com/tokio-rs/tokio/pull/4437# 1.16.0 (January 27, 2022)Fixes a soundness bug in `io::Take` ([#4428]). The unsoundness is exposed whenleaking memory in the given `AsyncRead` implementation and then overwriting thesupplied buffer:```rustimpl AsyncRead for Buggy {    fn poll_read(        self: Pin<&mut Self>,        cx: &mut Context<'_>,        buf: &mut ReadBuf<'_>    ) -> Poll<Result<()>> {      let new_buf = vec![0; 5].leak();      *buf = ReadBuf::new(new_buf);      buf.put_slice(b"hello");      Poll::Ready(Ok(()))    }}```Also, this release includes improvements to the multi-threaded scheduler thatcan increase throughput by up to 20% in some cases ([#4383]).### Fixed- io: **soundness** don't expose uninitialized memory when using `io::Take` in edge case ([#4428])- fs: ensure `File::write` results in a `write` syscall when the runtime shuts down ([#4316])- process: drop pipe after child exits in `wait_with_output` ([#4315])- rt: improve error message when spawning a thread fails ([#4398])- rt: reduce false-positive thread wakups in the multi-threaded scheduler ([#4383])- sync: don't inherit `Send` from `parking_lot::*Guard` ([#4359])### Added- net: `TcpSocket::linger()` and `set_linger()` ([#4324])- net: impl `UnwindSafe` for socket types ([#4384])- rt: impl `UnwindSafe` for `JoinHandle` ([#4418])- sync: `watch::Receiver::has_changed()` ([#4342])- sync: `oneshot::Receiver::blocking_recv()` ([#4334])- sync: `RwLock` blocking operations ([#4425])### UnstableThe following changes only apply when building with `--cfg tokio_unstable`- rt: **breaking change** overhaul runtime metrics API ([#4373])[#4428]: https://github.com/tokio-rs/tokio/pull/4428[#4316]: https://github.com/tokio-rs/tokio/pull/4316[#4315]: https://github.com/tokio-rs/tokio/pull/4315[#4398]: https://github.com/tokio-rs/tokio/pull/4398[#4383]: https://github.com/tokio-rs/tokio/pull/4383[#4359]: https://github.com/tokio-rs/tokio/pull/4359[#4324]: https://github.com/tokio-rs/tokio/pull/4324[#4384]: https://github.com/tokio-rs/tokio/pull/4384[#4418]: https://github.com/tokio-rs/tokio/pull/4418[#4342]: https://github.com/tokio-rs/tokio/pull/4342[#4334]: https://github.com/tokio-rs/tokio/pull/4334[#4425]: https://github.com/tokio-rs/tokio/pull/4425[#4373]: https://github.com/tokio-rs/tokio/pull/4373# 1.15.0 (December 15, 2021)### Fixed- io: add cooperative yielding support to `io::empty()` ([#4300])- time: make timeout robust against budget-depleting tasks ([#4314])### Changed- update minimum supported Rust version to 1.46.### Added- time: add `Interval::reset()` ([#4248])- io: add explicit lifetimes to `AsyncFdReadyGuard` ([#4267])- process: add `Command::as_std()` ([#4295])### Added (unstable)- tracing: instrument `tokio::sync` types ([#4302])[#4302]: https://github.com/tokio-rs/tokio/pull/4302[#4300]: https://github.com/tokio-rs/tokio/pull/4300[#4295]: https://github.com/tokio-rs/tokio/pull/4295[#4267]: https://github.com/tokio-rs/tokio/pull/4267[#4248]: https://github.com/tokio-rs/tokio/pull/4248[#4314]: https://github.com/tokio-rs/tokio/pull/4314# 1.14.0 (November 15, 2021)### Fixed- macros: fix compiler errors when using `mut` patterns in `select!` ([#4211])- sync: fix a data race between `oneshot::Sender::send` and awaiting a  `oneshot::Receiver` when the oneshot has been closed ([#4226])- sync: make `AtomicWaker` panic safe ([#3689])- runtime: fix basic scheduler dropping tasks outside a runtime context  ([#4213])### Added- stats: add `RuntimeStats::busy_duration_total` ([#4179], [#4223])### Changed- io: updated `copy` buffer size to match `std::io::copy` ([#4209])### Documented-  io: rename buffer to file in doc-test ([#4230])-  sync: fix Notify example ([#4212])[#4211]: https://github.com/tokio-rs/tokio/pull/4211[#4226]: https://github.com/tokio-rs/tokio/pull/4226[#3689]: https://github.com/tokio-rs/tokio/pull/3689[#4213]: https://github.com/tokio-rs/tokio/pull/4213[#4179]: https://github.com/tokio-rs/tokio/pull/4179[#4223]: https://github.com/tokio-rs/tokio/pull/4223[#4209]: https://github.com/tokio-rs/tokio/pull/4209[#4230]: https://github.com/tokio-rs/tokio/pull/4230[#4212]: https://github.com/tokio-rs/tokio/pull/4212# 1.13.1 (November 15, 2021)### Fixed- sync: fix a data race between `oneshot::Sender::send` and awaiting a  `oneshot::Receiver` when the oneshot has been closed ([#4226])[#4226]: https://github.com/tokio-rs/tokio/pull/4226# 1.13.0 (October 29, 2021)### Fixed- sync: fix `Notify` to clone the waker before locking its waiter list ([#4129])- tokio: add riscv32 to non atomic64 architectures ([#4185])### Added- net: add `poll_{recv,send}_ready` methods to `udp` and `uds_datagram` ([#4131])- net: add `try_*`, `readable`, `writable`, `ready`, and `peer_addr` methods to split halves ([#4120])- sync: add `blocking_lock` to `Mutex` ([#4130])- sync: add `watch::Sender::send_replace` ([#3962], [#4195])- sync: expand `Debug` for `Mutex<T>` impl to unsized `T` ([#4134])- tracing: instrument time::Sleep ([#4072])- tracing: use structured location fields for spawned tasks ([#4128])### Changed- io: add assert in `copy_bidirectional` that `poll_write` is sensible ([#4125])- macros: use qualified syntax when polling in `select!` ([#4192])- runtime: handle `block_on` wakeups better ([#4157])- task: allocate callback on heap immediately in debug mode ([#4203])- tokio: assert platform-minimum requirements at build time ([#3797])### Documented- docs: conversion of doc comments to indicative mood ([#4174])- docs: add returning on the first error example for `try_join!` ([#4133])- docs: fixing broken links in `tokio/src/lib.rs` ([#4132])- signal: add example with background listener ([#4171])- sync: add more oneshot examples ([#4153])- time: document `Interval::tick` cancel safety ([#4152])[#3797]: https://github.com/tokio-rs/tokio/pull/3797[#3962]: https://github.com/tokio-rs/tokio/pull/3962[#4072]: https://github.com/tokio-rs/tokio/pull/4072[#4120]: https://github.com/tokio-rs/tokio/pull/4120[#4125]: https://github.com/tokio-rs/tokio/pull/4125[#4128]: https://github.com/tokio-rs/tokio/pull/4128[#4129]: https://github.com/tokio-rs/tokio/pull/4129[#4130]: https://github.com/tokio-rs/tokio/pull/4130[#4131]: https://github.com/tokio-rs/tokio/pull/4131[#4132]: https://github.com/tokio-rs/tokio/pull/4132[#4133]: https://github.com/tokio-rs/tokio/pull/4133[#4134]: https://github.com/tokio-rs/tokio/pull/4134[#4152]: https://github.com/tokio-rs/tokio/pull/4152[#4153]: https://github.com/tokio-rs/tokio/pull/4153[#4157]: https://github.com/tokio-rs/tokio/pull/4157[#4171]: https://github.com/tokio-rs/tokio/pull/4171[#4174]: https://github.com/tokio-rs/tokio/pull/4174[#4185]: https://github.com/tokio-rs/tokio/pull/4185[#4192]: https://github.com/tokio-rs/tokio/pull/4192[#4195]: https://github.com/tokio-rs/tokio/pull/4195[#4203]: https://github.com/tokio-rs/tokio/pull/4203# 1.12.0 (September 21, 2021)### Fixed- mpsc: ensure `try_reserve` error is consistent with `try_send` ([#4119])- mpsc: use `spin_loop_hint` instead of `yield_now` ([#4115])- sync: make `SendError` field public ([#4097])### Added- io: add POSIX AIO on FreeBSD ([#4054])- io: add convenience method `AsyncSeekExt::rewind` ([#4107])- runtime: add tracing span for `block_on` futures ([#4094])- runtime: callback when a worker parks and unparks ([#4070])- sync: implement `try_recv` for mpsc channels ([#4113])### Documented- docs: clarify CPU-bound tasks on Tokio ([#4105])- mpsc: document spurious failures on `poll_recv` ([#4117])- mpsc: document that `PollSender` impls `Sink` ([#4110])- task: document non-guarantees of `yield_now` ([#4091])- time: document paused time details better ([#4061], [#4103])[#4027]: https://github.com/tokio-rs/tokio/pull/4027[#4054]: https://github.com/tokio-rs/tokio/pull/4054[#4061]: https://github.com/tokio-rs/tokio/pull/4061[#4070]: https://github.com/tokio-rs/tokio/pull/4070[#4091]: https://github.com/tokio-rs/tokio/pull/4091[#4094]: https://github.com/tokio-rs/tokio/pull/4094[#4097]: https://github.com/tokio-rs/tokio/pull/4097[#4103]: https://github.com/tokio-rs/tokio/pull/4103[#4105]: https://github.com/tokio-rs/tokio/pull/4105[#4107]: https://github.com/tokio-rs/tokio/pull/4107[#4110]: https://github.com/tokio-rs/tokio/pull/4110[#4113]: https://github.com/tokio-rs/tokio/pull/4113[#4115]: https://github.com/tokio-rs/tokio/pull/4115[#4117]: https://github.com/tokio-rs/tokio/pull/4117[#4119]: https://github.com/tokio-rs/tokio/pull/4119# 1.11.0 (August 31, 2021)### Fixed - time: don't panic when Instant is not monotonic ([#4044]) - io: fix panic in `fill_buf` by not calling `poll_fill_buf` twice ([#4084])### Added - watch: add `watch::Sender::subscribe` ([#3800]) - process: add `from_std` to `ChildStd*` ([#4045]) - stats: initial work on runtime stats ([#4043])### Changed - tracing: change span naming to new console convention ([#4042]) - io: speed-up waking by using uninitialized array ([#4055], [#4071], [#4075])### Documented - time: make Sleep examples easier to find ([#4040])[#3800]: https://github.com/tokio-rs/tokio/pull/3800[#4040]: https://github.com/tokio-rs/tokio/pull/4040[#4042]: https://github.com/tokio-rs/tokio/pull/4042[#4043]: https://github.com/tokio-rs/tokio/pull/4043[#4044]: https://github.com/tokio-rs/tokio/pull/4044[#4045]: https://github.com/tokio-rs/tokio/pull/4045[#4055]: https://github.com/tokio-rs/tokio/pull/4055[#4071]: https://github.com/tokio-rs/tokio/pull/4071[#4075]: https://github.com/tokio-rs/tokio/pull/4075[#4084]: https://github.com/tokio-rs/tokio/pull/4084# 1.10.1 (August 24, 2021)### Fixed - runtime: fix leak in UnownedTask ([#4063])[#4063]: https://github.com/tokio-rs/tokio/pull/4063# 1.10.0 (August 12, 2021)### Added - io: add `(read|write)_f(32|64)[_le]` methods ([#4022]) - io: add `fill_buf` and `consume` to `AsyncBufReadExt` ([#3991]) - process: add `Child::raw_handle()` on windows ([#3998])### Fixed - doc: fix non-doc builds with `--cfg docsrs` ([#4020]) - io: flush eagerly in `io::copy` ([#4001]) - runtime: a debug assert was sometimes triggered during shutdown ([#4005]) - sync: use `spin_loop_hint` instead of `yield_now` in mpsc ([#4037]) - tokio: the test-util feature depends on rt, sync, and time ([#4036])### Changes - runtime: reorganize parts of the runtime ([#3979], [#4005]) - signal: make windows docs for signal module show up on unix builds ([#3770]) - task: quickly send task to heap on debug mode ([#4009])### Documented - io: document cancellation safety of `AsyncBufReadExt` ([#3997]) - sync: document when `watch::send` fails ([#4021])[#3770]: https://github.com/tokio-rs/tokio/pull/3770[#3979]: https://github.com/tokio-rs/tokio/pull/3979[#3991]: https://github.com/tokio-rs/tokio/pull/3991[#3997]: https://github.com/tokio-rs/tokio/pull/3997[#3998]: https://github.com/tokio-rs/tokio/pull/3998[#4001]: https://github.com/tokio-rs/tokio/pull/4001[#4005]: https://github.com/tokio-rs/tokio/pull/4005[#4009]: https://github.com/tokio-rs/tokio/pull/4009[#4020]: https://github.com/tokio-rs/tokio/pull/4020[#4021]: https://github.com/tokio-rs/tokio/pull/4021[#4022]: https://github.com/tokio-rs/tokio/pull/4022[#4036]: https://github.com/tokio-rs/tokio/pull/4036[#4037]: https://github.com/tokio-rs/tokio/pull/4037# 1.9.0 (July 22, 2021)### Added - net: allow customized I/O operations for `TcpStream` ([#3888]) - sync: add getter for the mutex from a guard ([#3928]) - task: expose nameable future for `TaskLocal::scope` ([#3273])### Fixed - Fix leak if output of future panics on drop ([#3967]) - Fix leak in `LocalSet` ([#3978])### Changes - runtime: reorganize parts of the runtime ([#3909], [#3939], [#3950], [#3955], [#3980]) - sync: clean up `OnceCell` ([#3945]) - task: remove mutex in `JoinError` ([#3959])[#3273]: https://github.com/tokio-rs/tokio/pull/3273[#3888]: https://github.com/tokio-rs/tokio/pull/3888[#3909]: https://github.com/tokio-rs/tokio/pull/3909[#3928]: https://github.com/tokio-rs/tokio/pull/3928[#3934]: https://github.com/tokio-rs/tokio/pull/3934[#3939]: https://github.com/tokio-rs/tokio/pull/3939[#3945]: https://github.com/tokio-rs/tokio/pull/3945[#3950]: https://github.com/tokio-rs/tokio/pull/3950[#3955]: https://github.com/tokio-rs/tokio/pull/3955[#3959]: https://github.com/tokio-rs/tokio/pull/3959[#3967]: https://github.com/tokio-rs/tokio/pull/3967[#3978]: https://github.com/tokio-rs/tokio/pull/3978[#3980]: https://github.com/tokio-rs/tokio/pull/3980# 1.8.3 (July 26, 2021)This release backports two fixes from 1.9.0### Fixed - Fix leak if output of future panics on drop ([#3967]) - Fix leak in `LocalSet` ([#3978])[#3967]: https://github.com/tokio-rs/tokio/pull/3967[#3978]: https://github.com/tokio-rs/tokio/pull/3978# 1.8.2 (July 19, 2021)Fixes a missed edge case from 1.8.1.### Fixed- runtime: drop canceled future on next poll ([#3965])[#3965]: https://github.com/tokio-rs/tokio/pull/3965# 1.8.1 (July 6, 2021)Forward ports 1.5.1 fixes.### Fixed- runtime: remotely abort tasks on `JoinHandle::abort` ([#3934])[#3934]: https://github.com/tokio-rs/tokio/pull/3934# 1.8.0 (July 2, 2021)### Added- io: add `get_{ref,mut}` methods to `AsyncFdReadyGuard` and `AsyncFdReadyMutGuard` ([#3807])- io: efficient implementation of vectored writes for `BufWriter` ([#3163])- net: add ready/try methods to `NamedPipe{Client,Server}` ([#3866], [#3899])- sync: add `watch::Receiver::borrow_and_update` ([#3813])- sync: implement `From<T>` for `OnceCell<T>` ([#3877])- time: allow users to specify Interval behavior when delayed ([#3721])### Added (unstable)- rt: add `tokio::task::Builder` ([#3881])### Fixed- net: handle HUP event with `UnixStream` ([#3898])### Documented- doc: document cancellation safety ([#3900])- time: add wait alias to sleep ([#3897])- time: document auto-advancing behavior of runtime ([#3763])[#3163]: https://github.com/tokio-rs/tokio/pull/3163[#3721]: https://github.com/tokio-rs/tokio/pull/3721[#3763]: https://github.com/tokio-rs/tokio/pull/3763[#3807]: https://github.com/tokio-rs/tokio/pull/3807[#3813]: https://github.com/tokio-rs/tokio/pull/3813[#3866]: https://github.com/tokio-rs/tokio/pull/3866[#3877]: https://github.com/tokio-rs/tokio/pull/3877[#3881]: https://github.com/tokio-rs/tokio/pull/3881[#3897]: https://github.com/tokio-rs/tokio/pull/3897[#3898]: https://github.com/tokio-rs/tokio/pull/3898[#3899]: https://github.com/tokio-rs/tokio/pull/3899[#3900]: https://github.com/tokio-rs/tokio/pull/3900# 1.7.2 (July 6, 2021)Forward ports 1.5.1 fixes.### Fixed- runtime: remotely abort tasks on `JoinHandle::abort` ([#3934])[#3934]: https://github.com/tokio-rs/tokio/pull/3934# 1.7.1 (June 18, 2021)### Fixed- runtime: fix early task shutdown during runtime shutdown ([#3870])[#3870]: https://github.com/tokio-rs/tokio/pull/3870# 1.7.0 (June 15, 2021)### Added- net: add named pipes on windows ([#3760])- net: add `TcpSocket` from `std::net::TcpStream` conversion ([#3838])- sync: add `receiver_count` to `watch::Sender` ([#3729])- sync: export `sync::notify::Notified` future publicly ([#3840])- tracing: instrument task wakers ([#3836])### Fixed- macros: suppress `clippy::default_numeric_fallback` lint in generated code ([#3831])- runtime: immediately drop new tasks when runtime is shut down ([#3752])- sync: deprecate unused `mpsc::RecvError` type ([#3833])### Documented- io: clarify EOF condition for `AsyncReadExt::read_buf` ([#3850])- io: clarify limits on return values of `AsyncWrite::poll_write` ([#3820])- sync: add examples to Semaphore ([#3808])[#3729]: https://github.com/tokio-rs/tokio/pull/3729[#3752]: https://github.com/tokio-rs/tokio/pull/3752[#3760]: https://github.com/tokio-rs/tokio/pull/3760[#3808]: https://github.com/tokio-rs/tokio/pull/3808[#3820]: https://github.com/tokio-rs/tokio/pull/3820[#3831]: https://github.com/tokio-rs/tokio/pull/3831[#3833]: https://github.com/tokio-rs/tokio/pull/3833[#3836]: https://github.com/tokio-rs/tokio/pull/3836[#3838]: https://github.com/tokio-rs/tokio/pull/3838[#3840]: https://github.com/tokio-rs/tokio/pull/3840[#3850]: https://github.com/tokio-rs/tokio/pull/3850# 1.6.3 (July 6, 2021)Forward ports 1.5.1 fixes.### Fixed- runtime: remotely abort tasks on `JoinHandle::abort` ([#3934])[#3934]: https://github.com/tokio-rs/tokio/pull/3934# 1.6.2 (June 14, 2021)### Fixes- test: sub-ms `time:advance` regression introduced in 1.6 ([#3852])[#3852]: https://github.com/tokio-rs/tokio/pull/3852# 1.6.1 (May 28, 2021)This release reverts [#3518] because it doesn't work on some kernels due toa kernel bug. ([#3803])[#3518]: https://github.com/tokio-rs/tokio/issues/3518[#3803]: https://github.com/tokio-rs/tokio/issues/3803# 1.6.0 (May 14, 2021)### Added- fs: try doing a non-blocking read before punting to the threadpool ([#3518])- io: add `write_all_buf` to `AsyncWriteExt` ([#3737])- io: implement `AsyncSeek` for `BufReader`, `BufWriter`, and `BufStream` ([#3491])- net: support non-blocking vectored I/O ([#3761])- sync: add `mpsc::Sender::{reserve_owned, try_reserve_owned}` ([#3704])- sync: add a `MutexGuard::map` method that returns a `MappedMutexGuard` ([#2472])- time: add getter for Interval's period ([#3705])### Fixed- io: wake pending writers on `DuplexStream` close ([#3756])- process: avoid redundant effort to reap orphan processes ([#3743])- signal: use `std::os::raw::c_int` instead of `libc::c_int` on public API ([#3774])- sync: preserve permit state in `notify_waiters` ([#3660])- task: update `JoinHandle` panic message ([#3727])- time: prevent `time::advance` from going too far ([#3712])### Documented- net: hide `net::unix::datagram` module from docs ([#3775])- process: updated example ([#3748])- sync: `Barrier` doc should use task, not thread ([#3780])- task: update documentation on `block_in_place` ([#3753])[#2472]: https://github.com/tokio-rs/tokio/pull/2472[#3491]: https://github.com/tokio-rs/tokio/pull/3491[#3518]: https://github.com/tokio-rs/tokio/pull/3518[#3660]: https://github.com/tokio-rs/tokio/pull/3660[#3704]: https://github.com/tokio-rs/tokio/pull/3704[#3705]: https://github.com/tokio-rs/tokio/pull/3705[#3712]: https://github.com/tokio-rs/tokio/pull/3712[#3727]: https://github.com/tokio-rs/tokio/pull/3727[#3737]: https://github.com/tokio-rs/tokio/pull/3737[#3743]: https://github.com/tokio-rs/tokio/pull/3743[#3748]: https://github.com/tokio-rs/tokio/pull/3748[#3753]: https://github.com/tokio-rs/tokio/pull/3753[#3756]: https://github.com/tokio-rs/tokio/pull/3756[#3761]: https://github.com/tokio-rs/tokio/pull/3761[#3774]: https://github.com/tokio-rs/tokio/pull/3774[#3775]: https://github.com/tokio-rs/tokio/pull/3775[#3780]: https://github.com/tokio-rs/tokio/pull/3780# 1.5.1 (July 6, 2021)### Fixed- runtime: remotely abort tasks on `JoinHandle::abort` ([#3934])[#3934]: https://github.com/tokio-rs/tokio/pull/3934# 1.5.0 (April 12, 2021)### Added- io: add `AsyncSeekExt::stream_position` ([#3650])- io: add `AsyncWriteExt::write_vectored` ([#3678])- io: add a `copy_bidirectional` utility ([#3572])- net: implement `IntoRawFd` for `TcpSocket` ([#3684])- sync: add `OnceCell` ([#3591])- sync: add `OwnedRwLockReadGuard` and `OwnedRwLockWriteGuard` ([#3340])- sync: add `Semaphore::is_closed` ([#3673])- sync: add `mpsc::Sender::capacity` ([#3690])- sync: allow configuring `RwLock` max reads ([#3644])- task: add `sync_scope` for `LocalKey` ([#3612])### Fixed- chore: try to avoid `noalias` attributes on intrusive linked list ([#3654])- rt: fix panic in `JoinHandle::abort()` when called from other threads ([#3672])- sync: don't panic in `oneshot::try_recv` ([#3674])- sync: fix notifications getting dropped on receiver drop ([#3652])- sync: fix `Semaphore` permit overflow calculation ([#3644])### Documented- io: clarify requirements of `AsyncFd` ([#3635])- runtime: fix unclear docs for `{Handle,Runtime}::block_on` ([#3628])- sync: document that `Semaphore` is fair ([#3693])- sync: improve doc on blocking mutex ([#3645])[#3340]: https://github.com/tokio-rs/tokio/pull/3340[#3572]: https://github.com/tokio-rs/tokio/pull/3572[#3591]: https://github.com/tokio-rs/tokio/pull/3591[#3612]: https://github.com/tokio-rs/tokio/pull/3612[#3628]: https://github.com/tokio-rs/tokio/pull/3628[#3635]: https://github.com/tokio-rs/tokio/pull/3635[#3644]: https://github.com/tokio-rs/tokio/pull/3644[#3645]: https://github.com/tokio-rs/tokio/pull/3645[#3650]: https://github.com/tokio-rs/tokio/pull/3650[#3652]: https://github.com/tokio-rs/tokio/pull/3652[#3654]: https://github.com/tokio-rs/tokio/pull/3654[#3672]: https://github.com/tokio-rs/tokio/pull/3672[#3673]: https://github.com/tokio-rs/tokio/pull/3673[#3674]: https://github.com/tokio-rs/tokio/pull/3674[#3678]: https://github.com/tokio-rs/tokio/pull/3678[#3684]: https://github.com/tokio-rs/tokio/pull/3684[#3690]: https://github.com/tokio-rs/tokio/pull/3690[#3693]: https://github.com/tokio-rs/tokio/pull/3693# 1.4.0 (March 20, 2021)### Added- macros: introduce biased argument for `select!` ([#3603])- runtime: add `Handle::block_on` ([#3569])### Fixed- runtime: avoid unnecessary polling of `block_on` future ([#3582])- runtime: fix memory leak/growth when creating many runtimes ([#3564])- runtime: mark `EnterGuard` with `must_use` ([#3609])### Documented- chore: mention fix for building docs in contributing guide ([#3618])- doc: add link to `PollSender` ([#3613])- doc: alias sleep to delay ([#3604])- sync: improve `Mutex` FIFO explanation ([#3615])- timer: fix double newline in module docs ([#3617])[#3564]: https://github.com/tokio-rs/tokio/pull/3564[#3613]: https://github.com/tokio-rs/tokio/pull/3613[#3618]: https://github.com/tokio-rs/tokio/pull/3618[#3617]: https://github.com/tokio-rs/tokio/pull/3617[#3582]: https://github.com/tokio-rs/tokio/pull/3582[#3615]: https://github.com/tokio-rs/tokio/pull/3615[#3603]: https://github.com/tokio-rs/tokio/pull/3603[#3609]: https://github.com/tokio-rs/tokio/pull/3609[#3604]: https://github.com/tokio-rs/tokio/pull/3604[#3569]: https://github.com/tokio-rs/tokio/pull/3569# 1.3.0 (March 9, 2021)### Added- coop: expose an `unconstrained()` opt-out ([#3547])- net: add `into_std` for net types without it ([#3509])- sync: add `same_channel` method to `mpsc::Sender` ([#3532])- sync: add `{try_,}acquire_many_owned` to `Semaphore` ([#3535])- sync: add back `RwLockWriteGuard::map` and `RwLockWriteGuard::try_map` ([#3348])### Fixed- sync: allow `oneshot::Receiver::close` after successful `try_recv` ([#3552])- time: do not panic on `timeout(Duration::MAX)` ([#3551])### Documented- doc: doc aliases for pre-1.0 function names ([#3523])- io: fix typos ([#3541])- io: note the EOF behavior of `read_until` ([#3536])- io: update `AsyncRead::poll_read` doc ([#3557])- net: update `UdpSocket` splitting doc ([#3517])- runtime: add link to `LocalSet` on `new_current_thread` ([#3508])- runtime: update documentation of thread limits ([#3527])- sync: do not recommend `join_all` for `Barrier` ([#3514])- sync: documentation for `oneshot` ([#3592])- sync: rename `notify` to `notify_one` ([#3526])- time: fix typo in `Sleep` doc ([#3515])- time: sync `interval.rs` and `time/mod.rs` docs ([#3533])[#3348]: https://github.com/tokio-rs/tokio/pull/3348[#3508]: https://github.com/tokio-rs/tokio/pull/3508[#3509]: https://github.com/tokio-rs/tokio/pull/3509[#3514]: https://github.com/tokio-rs/tokio/pull/3514[#3515]: https://github.com/tokio-rs/tokio/pull/3515[#3517]: https://github.com/tokio-rs/tokio/pull/3517[#3523]: https://github.com/tokio-rs/tokio/pull/3523[#3526]: https://github.com/tokio-rs/tokio/pull/3526[#3527]: https://github.com/tokio-rs/tokio/pull/3527[#3532]: https://github.com/tokio-rs/tokio/pull/3532[#3533]: https://github.com/tokio-rs/tokio/pull/3533[#3535]: https://github.com/tokio-rs/tokio/pull/3535[#3536]: https://github.com/tokio-rs/tokio/pull/3536[#3541]: https://github.com/tokio-rs/tokio/pull/3541[#3547]: https://github.com/tokio-rs/tokio/pull/3547[#3551]: https://github.com/tokio-rs/tokio/pull/3551[#3552]: https://github.com/tokio-rs/tokio/pull/3552[#3557]: https://github.com/tokio-rs/tokio/pull/3557[#3592]: https://github.com/tokio-rs/tokio/pull/3592# 1.2.0 (February 5, 2021)### Added- signal: make `Signal::poll_recv` method public ([#3383])### Fixed- time: make `test-util` paused time fully deterministic ([#3492])### Documented- sync: link to new broadcast and watch wrappers ([#3504])[#3383]: https://github.com/tokio-rs/tokio/pull/3383[#3492]: https://github.com/tokio-rs/tokio/pull/3492[#3504]: https://github.com/tokio-rs/tokio/pull/3504# 1.1.1 (January 29, 2021)Forward ports 1.0.3 fix.### Fixed- io: memory leak during shutdown ([#3477]).# 1.1.0 (January 22, 2021)### Added- net: add `try_read_buf` and `try_recv_buf` ([#3351])- mpsc: Add `Sender::try_reserve` function ([#3418])- sync: add `RwLock` `try_read` and `try_write` methods ([#3400])- io: add `ReadBuf::inner_mut` ([#3443])### Changed- macros: improve `select!` error message ([#3352])- io: keep track of initialized bytes in `read_to_end` ([#3426])- runtime: consolidate errors for context missing ([#3441])### Fixed- task: wake `LocalSet` on `spawn_local` ([#3369])- sync: fix panic in broadcast::Receiver drop ([#3434])### Documented- stream: link to new `Stream` wrappers in `tokio-stream` ([#3343])- docs: mention that `test-util` feature is not enabled with full ([#3397])- process: add documentation to process::Child fields ([#3437])- io: clarify `AsyncFd` docs about changes of the inner fd ([#3430])- net: update datagram docs on splitting ([#3448])- time: document that `Sleep` is not `Unpin` ([#3457])- sync: add link to `PollSemaphore` ([#3456])- task: add `LocalSet` example ([#3438])- sync: improve bounded `mpsc` documentation ([#3458])[#3343]: https://github.com/tokio-rs/tokio/pull/3343[#3351]: https://github.com/tokio-rs/tokio/pull/3351[#3352]: https://github.com/tokio-rs/tokio/pull/3352[#3369]: https://github.com/tokio-rs/tokio/pull/3369[#3397]: https://github.com/tokio-rs/tokio/pull/3397[#3400]: https://github.com/tokio-rs/tokio/pull/3400[#3418]: https://github.com/tokio-rs/tokio/pull/3418[#3426]: https://github.com/tokio-rs/tokio/pull/3426[#3430]: https://github.com/tokio-rs/tokio/pull/3430[#3434]: https://github.com/tokio-rs/tokio/pull/3434[#3437]: https://github.com/tokio-rs/tokio/pull/3437[#3438]: https://github.com/tokio-rs/tokio/pull/3438[#3441]: https://github.com/tokio-rs/tokio/pull/3441[#3443]: https://github.com/tokio-rs/tokio/pull/3443[#3448]: https://github.com/tokio-rs/tokio/pull/3448[#3456]: https://github.com/tokio-rs/tokio/pull/3456[#3457]: https://github.com/tokio-rs/tokio/pull/3457[#3458]: https://github.com/tokio-rs/tokio/pull/3458# 1.0.3 (January 28, 2021)### Fixed- io: memory leak during shutdown ([#3477]).[#3477]: https://github.com/tokio-rs/tokio/pull/3477# 1.0.2 (January 14, 2021)### Fixed- io: soundness in `read_to_end` ([#3428]).[#3428]: https://github.com/tokio-rs/tokio/pull/3428# 1.0.1 (December 25, 2020)This release fixes a soundness hole caused by the combination of `RwLockWriteGuard::map`and `RwLockWriteGuard::downgrade` by removing the `map` function. This is a breakingchange, but breaking changes are allowed under our semver policy when they are requiredto fix a soundness hole. (See [this RFC][semver] for more.)Note that we have chosen not to do a deprecation cycle or similar because Tokio 1.0.0 wasreleased two days ago, and therefore the impact should be minimal.Due to the soundness hole, we have also yanked Tokio version 1.0.0.### Removed- sync: remove `RwLockWriteGuard::map` and `RwLockWriteGuard::try_map` ([#3345])### Fixed- docs: remove stream feature from docs ([#3335])[semver]: https://github.com/rust-lang/rfcs/blob/master/text/1122-language-semver.md#soundness-changes[#3335]: https://github.com/tokio-rs/tokio/pull/3335[#3345]: https://github.com/tokio-rs/tokio/pull/3345# 1.0.0 (December 23, 2020)Commit to the API and long-term support.### Fixed- sync: spurious wakeup in `watch` ([#3234]).### Changed- io: rename `AsyncFd::with_io()` to `try_io()` ([#3306])- fs: avoid OS specific `*Ext` traits in favor of conditionally defining the fn ([#3264]).- fs: `Sleep` is `!Unpin` ([#3278]).- net: pass `SocketAddr` by value ([#3125]).- net: `TcpStream::poll_peek` takes `ReadBuf` ([#3259]).- rt: rename `runtime::Builder::max_threads()` to `max_blocking_threads()` ([#3287]).- time: require `current_thread` runtime when calling `time::pause()` ([#3289]).### Removed- remove `tokio::prelude` ([#3299]).- io: remove `AsyncFd::with_poll()` ([#3306]).- net: remove `{Tcp,Unix}Stream::shutdown()` in favor of `AsyncWrite::shutdown()` ([#3298]).- stream: move all stream utilities to `tokio-stream` until `Stream` is added to  `std` ([#3277]).- sync: mpsc `try_recv()` due to unexpected behavior ([#3263]).- tracing: make unstable as `tracing-core` is not 1.0 yet ([#3266]).### Added- fs: `poll_*` fns to `DirEntry` ([#3308]).- io: `poll_*` fns to `io::Lines`, `io::Split` ([#3308]).- io: `_mut` method variants to `AsyncFd` ([#3304]).- net: `poll_*` fns to `UnixDatagram` ([#3223]).- net: `UnixStream` readiness and non-blocking ops ([#3246]).- sync: `UnboundedReceiver::blocking_recv()` ([#3262]).- sync: `watch::Sender::borrow()` ([#3269]).- sync: `Semaphore::close()` ([#3065]).- sync: `poll_recv` fns to `mpsc::Receiver`, `mpsc::UnboundedReceiver` ([#3308]).- time: `poll_tick` fn to `time::Interval` ([#3316]).[#3065]: https://github.com/tokio-rs/tokio/pull/3065[#3125]: https://github.com/tokio-rs/tokio/pull/3125[#3223]: https://github.com/tokio-rs/tokio/pull/3223[#3234]: https://github.com/tokio-rs/tokio/pull/3234[#3246]: https://github.com/tokio-rs/tokio/pull/3246[#3259]: https://github.com/tokio-rs/tokio/pull/3259[#3262]: https://github.com/tokio-rs/tokio/pull/3262[#3263]: https://github.com/tokio-rs/tokio/pull/3263[#3264]: https://github.com/tokio-rs/tokio/pull/3264[#3266]: https://github.com/tokio-rs/tokio/pull/3266[#3269]: https://github.com/tokio-rs/tokio/pull/3269[#3277]: https://github.com/tokio-rs/tokio/pull/3277[#3278]: https://github.com/tokio-rs/tokio/pull/3278[#3287]: https://github.com/tokio-rs/tokio/pull/3287[#3289]: https://github.com/tokio-rs/tokio/pull/3289[#3298]: https://github.com/tokio-rs/tokio/pull/3298[#3299]: https://github.com/tokio-rs/tokio/pull/3299[#3304]: https://github.com/tokio-rs/tokio/pull/3304[#3306]: https://github.com/tokio-rs/tokio/pull/3306[#3308]: https://github.com/tokio-rs/tokio/pull/3308[#3316]: https://github.com/tokio-rs/tokio/pull/3316# 0.3.6 (December 14, 2020)### Fixed- rt: fix deadlock in shutdown ([#3228])- rt: fix panic in task abort when off rt ([#3159])- sync: make `add_permits` panic with usize::MAX >> 3 permits ([#3188])- time: Fix race condition in timer drop ([#3229])- watch: fix spurious wakeup ([#3244])### Added- example: add back udp-codec example ([#3205])- net: add `TcpStream::into_std` ([#3189])[#3159]: https://github.com/tokio-rs/tokio/pull/3159[#3188]: https://github.com/tokio-rs/tokio/pull/3188[#3189]: https://github.com/tokio-rs/tokio/pull/3189[#3205]: https://github.com/tokio-rs/tokio/pull/3205[#3228]: https://github.com/tokio-rs/tokio/pull/3228[#3229]: https://github.com/tokio-rs/tokio/pull/3229[#3244]: https://github.com/tokio-rs/tokio/pull/3244# 0.3.5 (November 30, 2020)### Fixed- rt: fix `shutdown_timeout(0)` ([#3196]).- time: fixed race condition with small sleeps ([#3069]).### Added- io: `AsyncFd::with_interest()` ([#3167]).- signal: `CtrlC` stream on windows ([#3186]).[#3069]: https://github.com/tokio-rs/tokio/pull/3069[#3167]: https://github.com/tokio-rs/tokio/pull/3167[#3186]: https://github.com/tokio-rs/tokio/pull/3186[#3196]: https://github.com/tokio-rs/tokio/pull/3196# 0.3.4 (November 18, 2020)### Fixed- stream: `StreamMap` `Default` impl bound ([#3093]).- io: `AsyncFd::into_inner()` should deregister the FD ([#3104]).### Changed- meta: `parking_lot` feature enabled with `full` ([#3119]).### Added- io: `AsyncWrite` vectored writes ([#3149]).- net: TCP/UDP readiness and non-blocking ops ([#3130], [#2743], [#3138]).- net: TCP socket option (linger, send/recv buf size) ([#3145], [#3143]).- net: PID field in `UCred` with solaris/illumos ([#3085]).- rt: `runtime::Handle` allows spawning onto a runtime ([#3079]).- sync: `Notify::notify_waiters()` ([#3098]).- sync: `acquire_many()`, `try_acquire_many()` to `Semaphore` ([#3067]).[#2743]: https://github.com/tokio-rs/tokio/pull/2743[#3067]: https://github.com/tokio-rs/tokio/pull/3067[#3079]: https://github.com/tokio-rs/tokio/pull/3079[#3085]: https://github.com/tokio-rs/tokio/pull/3085[#3093]: https://github.com/tokio-rs/tokio/pull/3093[#3098]: https://github.com/tokio-rs/tokio/pull/3098[#3104]: https://github.com/tokio-rs/tokio/pull/3104[#3119]: https://github.com/tokio-rs/tokio/pull/3119[#3130]: https://github.com/tokio-rs/tokio/pull/3130[#3138]: https://github.com/tokio-rs/tokio/pull/3138[#3143]: https://github.com/tokio-rs/tokio/pull/3143[#3145]: https://github.com/tokio-rs/tokio/pull/3145[#3149]: https://github.com/tokio-rs/tokio/pull/3149# 0.3.3 (November 2, 2020)Fixes a soundness hole by adding a missing `Send` bound to`Runtime::spawn_blocking()`.### Fixed- rt: include missing `Send`, fixing soundness hole ([#3089]).- tracing: avoid huge trace span names ([#3074]).### Added- net: `TcpSocket::reuseport()`, `TcpSocket::set_reuseport()` ([#3083]).- net: `TcpSocket::reuseaddr()` ([#3093]).- net: `TcpSocket::local_addr()` ([#3093]).- net: add pid to `UCred` ([#2633]).[#2633]: https://github.com/tokio-rs/tokio/pull/2633[#3074]: https://github.com/tokio-rs/tokio/pull/3074[#3083]: https://github.com/tokio-rs/tokio/pull/3083[#3089]: https://github.com/tokio-rs/tokio/pull/3089[#3093]: https://github.com/tokio-rs/tokio/pull/3093# 0.3.2 (October 27, 2020)Adds `AsyncFd` as a replacement for v0.2's `PollEvented`.### Fixed- io: fix a potential deadlock when shutting down the I/O driver ([#2903]).- sync: `RwLockWriteGuard::downgrade()` bug ([#2957]).### Added- io: `AsyncFd` for receiving readiness events on raw FDs ([#2903]).- net: `poll_*` function on `UdpSocket` ([#2981]).- net: `UdpSocket::take_error()` ([#3051]).- sync: `oneshot::Sender::poll_closed()` ([#3032]).[#2903]: https://github.com/tokio-rs/tokio/pull/2903[#2957]: https://github.com/tokio-rs/tokio/pull/2957[#2981]: https://github.com/tokio-rs/tokio/pull/2981[#3032]: https://github.com/tokio-rs/tokio/pull/3032[#3051]: https://github.com/tokio-rs/tokio/pull/3051# 0.3.1 (October 21, 2020)This release fixes an use-after-free in the IO driver. Additionally, the `read_buf`and `write_buf` methods have been added back to the IO traits, as the bytes crateis now on track to reach version 1.0 together with Tokio.### Fixed- net: fix use-after-free ([#3019]).- fs: ensure buffered data is written on shutdown ([#3009]).### Added- io: `copy_buf()` ([#2884]).- io: `AsyncReadExt::read_buf()`, `AsyncReadExt::write_buf()` for working with  `Buf`/`BufMut` ([#3003]).- rt: `Runtime::spawn_blocking()` ([#2980]).- sync: `watch::Sender::is_closed()` ([#2991]).[#2884]: https://github.com/tokio-rs/tokio/pull/2884[#2980]: https://github.com/tokio-rs/tokio/pull/2980[#2991]: https://github.com/tokio-rs/tokio/pull/2991[#3003]: https://github.com/tokio-rs/tokio/pull/3003[#3009]: https://github.com/tokio-rs/tokio/pull/3009[#3019]: https://github.com/tokio-rs/tokio/pull/3019# 0.3.0 (October 15, 2020)This represents a 1.0 beta release. APIs are polished and future-proofed. APIsnot included for 1.0 stabilization have been removed.Biggest changes are:- I/O driver internal rewrite. The windows implementation includes significant  changes.- Runtime API is polished, especially with how it interacts with feature flag  combinations.- Feature flags are simplified  - `rt-core` and `rt-util` are combined to `rt`  - `rt-threaded` is renamed to `rt-multi-thread` to match builder API  - `tcp`, `udp`, `uds`, `dns` are combined to `net`.  - `parking_lot` is included with `full`### Changes- meta: Minimum supported Rust version is now 1.45.- io: `AsyncRead` trait now takes `ReadBuf` in order to safely handle reading  into uninitialized memory ([#2758]).- io: Internal I/O driver storage is now able to compact ([#2757]).- rt: `Runtime::block_on` now takes `&self` ([#2782]).- sync: `watch` reworked to decouple receiving a change notification from  receiving the value ([#2814], [#2806]).- sync: `Notify::notify` is renamed to `notify_one` ([#2822]).- process: `Child::kill` is now an `async fn` that cleans zombies ([#2823]).- sync: use `const fn` constructors as possible ([#2833], [#2790])- signal: reduce cross-thread notification ([#2835]).- net: tcp,udp,uds types support operations with `&self` ([#2828], [#2919], [#2934]).- sync: blocking `mpsc` channel supports `send` with `&self` ([#2861]).- time: rename `delay_for` and `delay_until` to `sleep` and `sleep_until` ([#2826]).- io: upgrade to `mio` 0.7 ([#2893]).- io: `AsyncSeek` trait is tweaked ([#2885]).- fs: `File` operations take `&self` ([#2930]).- rt: runtime API, and `#[tokio::main]` macro polish ([#2876])- rt: `Runtime::enter` uses an RAII guard instead of a closure ([#2954]).- net: the `from_std` function on all sockets no longer sets socket into non-blocking mode ([#2893])### Added- sync: `map` function to lock guards ([#2445]).- sync: `blocking_recv` and `blocking_send` fns to `mpsc` for use outside of Tokio ([#2685]).- rt: `Builder::thread_name_fn` for configuring thread names ([#1921]).- fs: impl `FromRawFd` and `FromRawHandle` for `File` ([#2792]).- process: `Child::wait` and `Child::try_wait` ([#2796]).- rt: support configuring thread keep-alive duration ([#2809]).- rt: `task::JoinHandle::abort` forcibly cancels a spawned task ([#2474]).- sync: `RwLock` write guard to read guard downgrading ([#2733]).- net: add `poll_*` functions that take `&self` to all net types ([#2845])- sync: `get_mut()` for `Mutex`, `RwLock` ([#2856]).- sync: `mpsc::Sender::closed()` waits for `Receiver` half to close ([#2840]).- sync: `mpsc::Sender::is_closed()` returns true if `Receiver` half is closed ([#2726]).- stream: `iter` and `iter_mut` to `StreamMap` ([#2890]).- net: implement `AsRawSocket` on windows ([#2911]).- net: `TcpSocket` creates a socket without binding or listening ([#2920]).### Removed- io: vectored ops are removed from `AsyncRead`, `AsyncWrite` traits ([#2882]).- io: `mio` is removed from the public API. `PollEvented` and` Registration` are  removed ([#2893]).- io: remove `bytes` from public API. `Buf` and `BufMut` implementation are  removed ([#2908]).- time: `DelayQueue` is moved to `tokio-util` ([#2897]).### Fixed- io: `stdout` and `stderr` buffering on windows ([#2734]).[#1921]: https://github.com/tokio-rs/tokio/pull/1921[#2445]: https://github.com/tokio-rs/tokio/pull/2445[#2474]: https://github.com/tokio-rs/tokio/pull/2474[#2685]: https://github.com/tokio-rs/tokio/pull/2685[#2726]: https://github.com/tokio-rs/tokio/pull/2726[#2733]: https://github.com/tokio-rs/tokio/pull/2733[#2734]: https://github.com/tokio-rs/tokio/pull/2734[#2757]: https://github.com/tokio-rs/tokio/pull/2757[#2758]: https://github.com/tokio-rs/tokio/pull/2758[#2782]: https://github.com/tokio-rs/tokio/pull/2782[#2790]: https://github.com/tokio-rs/tokio/pull/2790[#2792]: https://github.com/tokio-rs/tokio/pull/2792[#2796]: https://github.com/tokio-rs/tokio/pull/2796[#2806]: https://github.com/tokio-rs/tokio/pull/2806[#2809]: https://github.com/tokio-rs/tokio/pull/2809[#2814]: https://github.com/tokio-rs/tokio/pull/2814[#2822]: https://github.com/tokio-rs/tokio/pull/2822[#2823]: https://github.com/tokio-rs/tokio/pull/2823[#2826]: https://github.com/tokio-rs/tokio/pull/2826[#2828]: https://github.com/tokio-rs/tokio/pull/2828[#2833]: https://github.com/tokio-rs/tokio/pull/2833[#2835]: https://github.com/tokio-rs/tokio/pull/2835[#2840]: https://github.com/tokio-rs/tokio/pull/2840[#2845]: https://github.com/tokio-rs/tokio/pull/2845[#2856]: https://github.com/tokio-rs/tokio/pull/2856[#2861]: https://github.com/tokio-rs/tokio/pull/2861[#2876]: https://github.com/tokio-rs/tokio/pull/2876[#2882]: https://github.com/tokio-rs/tokio/pull/2882[#2885]: https://github.com/tokio-rs/tokio/pull/2885[#2890]: https://github.com/tokio-rs/tokio/pull/2890[#2893]: https://github.com/tokio-rs/tokio/pull/2893[#2897]: https://github.com/tokio-rs/tokio/pull/2897[#2908]: https://github.com/tokio-rs/tokio/pull/2908[#2911]: https://github.com/tokio-rs/tokio/pull/2911[#2919]: https://github.com/tokio-rs/tokio/pull/2919[#2920]: https://github.com/tokio-rs/tokio/pull/2920[#2930]: https://github.com/tokio-rs/tokio/pull/2930[#2934]: https://github.com/tokio-rs/tokio/pull/2934[#2954]: https://github.com/tokio-rs/tokio/pull/2954# 0.2.22 (July 21, 2020)### Fixes- docs: misc improvements ([#2572], [#2658], [#2663], [#2656], [#2647], [#2630], [#2487], [#2621],  [#2624], [#2600], [#2623], [#2622], [#2577], [#2569], [#2589], [#2575], [#2540], [#2564], [#2567],  [#2520], [#2521], [#2493])- rt: allow calls to `block_on` inside calls to `block_in_place` that are  themselves inside `block_on` ([#2645])- net: fix non-portable behavior when dropping `TcpStream` `OwnedWriteHalf` ([#2597])- io: improve stack usage by allocating large buffers on directly on the heap  ([#2634])- io: fix unsound pin projection in `AsyncReadExt::read_buf` and  `AsyncWriteExt::write_buf` ([#2612])- io: fix unnecessary zeroing for `AsyncRead` implementors ([#2525])- io: Fix `BufReader` not correctly forwarding `poll_write_buf` ([#2654])- io: fix panic in `AsyncReadExt::read_line` ([#2541])### Changes- coop: returning `Poll::Pending` no longer decrements the task budget ([#2549])### Added- io: little-endian variants of `AsyncReadExt` and `AsyncWriteExt` methods  ([#1915])- task: add [`tracing`] instrumentation to spawned tasks ([#2655])- sync: allow unsized types in `Mutex` and `RwLock` (via `default` constructors)  ([#2615])- net: add `ToSocketAddrs` implementation for `&[SocketAddr]` ([#2604])- fs: add `OpenOptionsExt` for `OpenOptions` ([#2515])- fs: add `DirBuilder` ([#2524])[`tracing`]: https://crates.io/crates/tracing[#1915]: https://github.com/tokio-rs/tokio/pull/1915[#2487]: https://github.com/tokio-rs/tokio/pull/2487[#2493]: https://github.com/tokio-rs/tokio/pull/2493[#2515]: https://github.com/tokio-rs/tokio/pull/2515[#2520]: https://github.com/tokio-rs/tokio/pull/2520[#2521]: https://github.com/tokio-rs/tokio/pull/2521[#2524]: https://github.com/tokio-rs/tokio/pull/2524[#2525]: https://github.com/tokio-rs/tokio/pull/2525[#2540]: https://github.com/tokio-rs/tokio/pull/2540[#2541]: https://github.com/tokio-rs/tokio/pull/2541[#2549]: https://github.com/tokio-rs/tokio/pull/2549[#2564]: https://github.com/tokio-rs/tokio/pull/2564[#2567]: https://github.com/tokio-rs/tokio/pull/2567[#2569]: https://github.com/tokio-rs/tokio/pull/2569[#2572]: https://github.com/tokio-rs/tokio/pull/2572[#2575]: https://github.com/tokio-rs/tokio/pull/2575[#2577]: https://github.com/tokio-rs/tokio/pull/2577[#2589]: https://github.com/tokio-rs/tokio/pull/2589[#2597]: https://github.com/tokio-rs/tokio/pull/2597[#2600]: https://github.com/tokio-rs/tokio/pull/2600[#2604]: https://github.com/tokio-rs/tokio/pull/2604[#2612]: https://github.com/tokio-rs/tokio/pull/2612[#2615]: https://github.com/tokio-rs/tokio/pull/2615[#2621]: https://github.com/tokio-rs/tokio/pull/2621[#2622]: https://github.com/tokio-rs/tokio/pull/2622[#2623]: https://github.com/tokio-rs/tokio/pull/2623[#2624]: https://github.com/tokio-rs/tokio/pull/2624[#2630]: https://github.com/tokio-rs/tokio/pull/2630[#2634]: https://github.com/tokio-rs/tokio/pull/2634[#2645]: https://github.com/tokio-rs/tokio/pull/2645[#2647]: https://github.com/tokio-rs/tokio/pull/2647[#2654]: https://github.com/tokio-rs/tokio/pull/2654[#2655]: https://github.com/tokio-rs/tokio/pull/2655[#2656]: https://github.com/tokio-rs/tokio/pull/2656[#2658]: https://github.com/tokio-rs/tokio/pull/2658[#2663]: https://github.com/tokio-rs/tokio/pull/2663# 0.2.21 (May 13, 2020)### Fixes- macros: disambiguate built-in `#[test]` attribute in macro expansion ([#2503])- rt: `LocalSet` and task budgeting ([#2462]).- rt: task budgeting with `block_in_place` ([#2502]).- sync: release `broadcast` channel memory without sending a value ([#2509]).- time: notify when resetting a `Delay` to a time in the past ([#2290])### Added- io: `get_mut`, `get_ref`, and `into_inner` to `Lines` ([#2450]).- io: `mio::Ready` argument to `PollEvented` ([#2419]).- os: illumos support ([#2486]).- rt: `Handle::spawn_blocking` ([#2501]).- sync: `OwnedMutexGuard` for `Arc<Mutex<T>>` ([#2455]).[#2290]: https://github.com/tokio-rs/tokio/pull/2290[#2419]: https://github.com/tokio-rs/tokio/pull/2419[#2450]: https://github.com/tokio-rs/tokio/pull/2450[#2455]: https://github.com/tokio-rs/tokio/pull/2455[#2462]: https://github.com/tokio-rs/tokio/pull/2462[#2486]: https://github.com/tokio-rs/tokio/pull/2486[#2501]: https://github.com/tokio-rs/tokio/pull/2501[#2502]: https://github.com/tokio-rs/tokio/pull/2502[#2503]: https://github.com/tokio-rs/tokio/pull/2503[#2509]: https://github.com/tokio-rs/tokio/pull/2509# 0.2.20 (April 28, 2020)### Fixes- sync: `broadcast` closing the channel no longer requires capacity ([#2448]).- rt: regression when configuring runtime with `max_threads` less than number of CPUs ([#2457]).[#2448]: https://github.com/tokio-rs/tokio/pull/2448[#2457]: https://github.com/tokio-rs/tokio/pull/2457# 0.2.19 (April 24, 2020)### Fixes- docs: misc improvements ([#2400], [#2405], [#2414], [#2420], [#2423], [#2426], [#2427], [#2434], [#2436], [#2440]).- rt: support `block_in_place` in more contexts ([#2409], [#2410]).- stream: no panic in `merge()` and `chain()` when using `size_hint()` ([#2430]).- task: include visibility modifier when defining a task-local ([#2416]).### Added- rt: `runtime::Handle::block_on` ([#2437]).- sync: owned `Semaphore` permit ([#2421]).- tcp: owned split ([#2270]).[#2270]: https://github.com/tokio-rs/tokio/pull/2270[#2400]: https://github.com/tokio-rs/tokio/pull/2400[#2405]: https://github.com/tokio-rs/tokio/pull/2405[#2409]: https://github.com/tokio-rs/tokio/pull/2409[#2410]: https://github.com/tokio-rs/tokio/pull/2410[#2414]: https://github.com/tokio-rs/tokio/pull/2414[#2416]: https://github.com/tokio-rs/tokio/pull/2416[#2420]: https://github.com/tokio-rs/tokio/pull/2420[#2421]: https://github.com/tokio-rs/tokio/pull/2421[#2423]: https://github.com/tokio-rs/tokio/pull/2423[#2426]: https://github.com/tokio-rs/tokio/pull/2426[#2427]: https://github.com/tokio-rs/tokio/pull/2427[#2430]: https://github.com/tokio-rs/tokio/pull/2430[#2434]: https://github.com/tokio-rs/tokio/pull/2434[#2436]: https://github.com/tokio-rs/tokio/pull/2436[#2437]: https://github.com/tokio-rs/tokio/pull/2437[#2440]: https://github.com/tokio-rs/tokio/pull/2440# 0.2.18 (April 12, 2020)### Fixes- task: `LocalSet` was incorrectly marked as `Send` ([#2398])- io: correctly report `WriteZero` failure in `write_int` ([#2334])[#2334]: https://github.com/tokio-rs/tokio/pull/2334[#2398]: https://github.com/tokio-rs/tokio/pull/2398# 0.2.17 (April 9, 2020)### Fixes- rt: bug in work-stealing queue ([#2387])### Changes- rt: threadpool uses logical CPU count instead of physical by default ([#2391])[#2387]: https://github.com/tokio-rs/tokio/pull/2387[#2391]: https://github.com/tokio-rs/tokio/pull/2391# 0.2.16 (April 3, 2020)### Fixes- sync: fix a regression where `Mutex`, `Semaphore`, and `RwLock` futures no  longer implement `Sync` ([#2375])- fs: fix `fs::copy` not copying file permissions ([#2354])### Added- time: added `deadline` method to `delay_queue::Expired` ([#2300])- io: added `StreamReader` ([#2052])[#2052]: https://github.com/tokio-rs/tokio/pull/2052[#2300]: https://github.com/tokio-rs/tokio/pull/2300[#2354]: https://github.com/tokio-rs/tokio/pull/2354[#2375]: https://github.com/tokio-rs/tokio/pull/2375# 0.2.15 (April 2, 2020)### Fixes- rt: fix queue regression ([#2362]).### Added- sync: Add disarm to `mpsc::Sender` ([#2358]).[#2358]: https://github.com/tokio-rs/tokio/pull/2358[#2362]: https://github.com/tokio-rs/tokio/pull/2362# 0.2.14 (April 1, 2020)### Fixes- rt: concurrency bug in scheduler ([#2273]).- rt: concurrency bug with shell runtime ([#2333]).- test-util: correct pause/resume of time ([#2253]).- time: `DelayQueue` correct wakeup after `insert` ([#2285]).### Added- io: impl `RawFd`, `AsRawHandle` for std io types ([#2335]).- rt: automatic cooperative task yielding ([#2160], [#2343], [#2349]).- sync: `RwLock::into_inner` ([#2321]).### Changed- sync: semaphore, mutex internals rewritten to avoid allocations ([#2325]).[#2160]: https://github.com/tokio-rs/tokio/pull/2160[#2253]: https://github.com/tokio-rs/tokio/pull/2253[#2273]: https://github.com/tokio-rs/tokio/pull/2273[#2285]: https://github.com/tokio-rs/tokio/pull/2285[#2321]: https://github.com/tokio-rs/tokio/pull/2321[#2325]: https://github.com/tokio-rs/tokio/pull/2325[#2333]: https://github.com/tokio-rs/tokio/pull/2333[#2335]: https://github.com/tokio-rs/tokio/pull/2335[#2343]: https://github.com/tokio-rs/tokio/pull/2343[#2349]: https://github.com/tokio-rs/tokio/pull/2349# 0.2.13 (February 28, 2020)### Fixes- macros: unresolved import in `pin!` ([#2281]).[#2281]: https://github.com/tokio-rs/tokio/pull/2281# 0.2.12 (February 27, 2020)### Fixes- net: `UnixStream::poll_shutdown` should call `shutdown(Write)` ([#2245]).- process: Wake up read and write on `EPOLLERR` ([#2218]).- rt: potential deadlock when using `block_in_place` and shutting down the  runtime ([#2119]).- rt: only detect number of CPUs if `core_threads` not specified ([#2238]).- sync: reduce `watch::Receiver` struct size ([#2191]).- time: succeed when setting delay of `$MAX-1` ([#2184]).- time: avoid having to poll `DelayQueue` after inserting new delay ([#2217]).### Added- macros: `pin!` variant that assigns to identifier and pins ([#2274]).- net: impl `Stream` for `Listener` types ([#2275]).- rt: `Runtime::shutdown_timeout` waits for runtime to shutdown for specified  duration ([#2186]).- stream: `StreamMap` merges streams and can insert / remove streams at  runtime ([#2185]).- stream: `StreamExt::skip()` skips a fixed number of items ([#2204]).- stream: `StreamExt::skip_while()` skips items based on a predicate ([#2205]).- sync: `Notify` provides basic `async` / `await` task notification ([#2210]).- sync: `Mutex::into_inner` retrieves guarded data ([#2250]).- sync: `mpsc::Sender::send_timeout` sends, waiting for up to specified duration  for channel capacity ([#2227]).- time: impl `Ord` and `Hash` for `Instant` ([#2239]).[#2119]: https://github.com/tokio-rs/tokio/pull/2119[#2184]: https://github.com/tokio-rs/tokio/pull/2184[#2185]: https://github.com/tokio-rs/tokio/pull/2185[#2186]: https://github.com/tokio-rs/tokio/pull/2186[#2191]: https://github.com/tokio-rs/tokio/pull/2191[#2204]: https://github.com/tokio-rs/tokio/pull/2204[#2205]: https://github.com/tokio-rs/tokio/pull/2205[#2210]: https://github.com/tokio-rs/tokio/pull/2210[#2217]: https://github.com/tokio-rs/tokio/pull/2217[#2218]: https://github.com/tokio-rs/tokio/pull/2218[#2227]: https://github.com/tokio-rs/tokio/pull/2227[#2238]: https://github.com/tokio-rs/tokio/pull/2238[#2239]: https://github.com/tokio-rs/tokio/pull/2239[#2245]: https://github.com/tokio-rs/tokio/pull/2245[#2250]: https://github.com/tokio-rs/tokio/pull/2250[#2274]: https://github.com/tokio-rs/tokio/pull/2274[#2275]: https://github.com/tokio-rs/tokio/pull/2275# 0.2.11 (January 27, 2020)### Fixes- docs: misc fixes and tweaks ([#2155], [#2103], [#2027], [#2167], [#2175]).- macros: handle generics in `#[tokio::main]` method ([#2177]).- sync: `broadcast` potential lost notifications ([#2135]).- rt: improve "no runtime" panic messages ([#2145]).### Added- optional support for using `parking_lot` internally ([#2164]).- fs: `fs::copy`, an async version of `std::fs::copy` ([#2079]).- macros: `select!` waits for the first branch to complete ([#2152]).- macros: `join!` waits for all branches to complete ([#2158]).- macros: `try_join!` waits for all branches to complete or the first error ([#2169]).- macros: `pin!` pins a value to the stack ([#2163]).- net: `ReadHalf::poll()` and `ReadHalf::poll_peak` ([#2151])- stream: `StreamExt::timeout()` sets a per-item max duration ([#2149]).- stream: `StreamExt::fold()` applies a function, producing a single value. ([#2122]).- sync: impl `Eq`, `PartialEq` for `oneshot::RecvError` ([#2168]).- task: methods for inspecting the `JoinError` cause ([#2051]).[#2027]: https://github.com/tokio-rs/tokio/pull/2027[#2051]: https://github.com/tokio-rs/tokio/pull/2051[#2079]: https://github.com/tokio-rs/tokio/pull/2079[#2103]: https://github.com/tokio-rs/tokio/pull/2103[#2122]: https://github.com/tokio-rs/tokio/pull/2122[#2135]: https://github.com/tokio-rs/tokio/pull/2135[#2145]: https://github.com/tokio-rs/tokio/pull/2145[#2149]: https://github.com/tokio-rs/tokio/pull/2149[#2151]: https://github.com/tokio-rs/tokio/pull/2151[#2152]: https://github.com/tokio-rs/tokio/pull/2152[#2155]: https://github.com/tokio-rs/tokio/pull/2155[#2158]: https://github.com/tokio-rs/tokio/pull/2158[#2163]: https://github.com/tokio-rs/tokio/pull/2163[#2164]: https://github.com/tokio-rs/tokio/pull/2164[#2167]: https://github.com/tokio-rs/tokio/pull/2167[#2168]: https://github.com/tokio-rs/tokio/pull/2168[#2169]: https://github.com/tokio-rs/tokio/pull/2169[#2175]: https://github.com/tokio-rs/tokio/pull/2175[#2177]: https://github.com/tokio-rs/tokio/pull/2177# 0.2.10 (January 21, 2020)### Fixes- `#[tokio::main]` when `rt-core` feature flag is not enabled ([#2139]).- remove `AsyncBufRead` from `BufStream` impl block ([#2108]).- potential undefined behavior when implementing `AsyncRead` incorrectly ([#2030]).### Added- `BufStream::with_capacity` ([#2125]).- impl `From` and `Default` for `RwLock` ([#2089]).- `io::ReadHalf::is_pair_of` checks if provided `WriteHalf` is for the same  underlying object ([#1762], [#2144]).- `runtime::Handle::try_current()` returns a handle to the current runtime ([#2118]).- `stream::empty()` returns an immediately ready empty stream ([#2092]).- `stream::once(val)` returns a stream that yields a single value: `val` ([#2094]).- `stream::pending()` returns a stream that never becomes ready ([#2092]).- `StreamExt::chain()` sequences a second stream after the first completes ([#2093]).- `StreamExt::collect()` transform a stream into a collection ([#2109]).- `StreamExt::fuse` ends the stream after the first `None` ([#2085]).- `StreamExt::merge` combines two streams, yielding values as they become ready ([#2091]).- Task-local storage ([#2126]).[#1762]: https://github.com/tokio-rs/tokio/pull/1762[#2030]: https://github.com/tokio-rs/tokio/pull/2030[#2085]: https://github.com/tokio-rs/tokio/pull/2085[#2089]: https://github.com/tokio-rs/tokio/pull/2089[#2091]: https://github.com/tokio-rs/tokio/pull/2091[#2092]: https://github.com/tokio-rs/tokio/pull/2092[#2093]: https://github.com/tokio-rs/tokio/pull/2093[#2094]: https://github.com/tokio-rs/tokio/pull/2094[#2108]: https://github.com/tokio-rs/tokio/pull/2108[#2109]: https://github.com/tokio-rs/tokio/pull/2109[#2118]: https://github.com/tokio-rs/tokio/pull/2118[#2125]: https://github.com/tokio-rs/tokio/pull/2125[#2126]: https://github.com/tokio-rs/tokio/pull/2126[#2139]: https://github.com/tokio-rs/tokio/pull/2139[#2144]: https://github.com/tokio-rs/tokio/pull/2144# 0.2.9 (January 9, 2020)### Fixes- `AsyncSeek` impl for `File` ([#1986]).- rt: shutdown deadlock in `threaded_scheduler` ([#2074], [#2082]).- rt: memory ordering when dropping `JoinHandle` ([#2044]).- docs: misc API documentation fixes and improvements.[#1986]: https://github.com/tokio-rs/tokio/pull/1986[#2044]: https://github.com/tokio-rs/tokio/pull/2044[#2074]: https://github.com/tokio-rs/tokio/pull/2074[#2082]: https://github.com/tokio-rs/tokio/pull/2082# 0.2.8 (January 7, 2020)### Fixes- depend on new version of `tokio-macros`.# 0.2.7 (January 7, 2020)### Fixes- potential deadlock when dropping `basic_scheduler` Runtime.- calling `spawn_blocking` from within a `spawn_blocking` ([#2006]).- storing a `Runtime` instance in a thread-local ([#2011]).- miscellaneous documentation fixes.- rt: fix `Waker::will_wake` to return true when tasks match ([#2045]).- test-util: `time::advance` runs pending tasks before changing the time ([#2059]).### Added- `net::lookup_host` maps a `T: ToSocketAddrs` to a stream of `SocketAddrs` ([#1870]).- `process::Child` fields are made public to match `std` ([#2014]).- impl `Stream` for `sync::broadcast::Receiver` ([#2012]).- `sync::RwLock` provides an asynchronous read-write lock ([#1699]).- `runtime::Handle::current` returns the handle for the current runtime ([#2040]).- `StreamExt::filter` filters stream values according to a predicate ([#2001]).- `StreamExt::filter_map` simultaneously filter and map stream values ([#2001]).- `StreamExt::try_next` convenience for streams of `Result<T, E>` ([#2005]).- `StreamExt::take` limits a stream to a specified number of values ([#2025]).- `StreamExt::take_while` limits a stream based on a predicate ([#2029]).- `StreamExt::all` tests if every element of the stream matches a predicate ([#2035]).- `StreamExt::any` tests if any element of the stream matches a predicate ([#2034]).- `task::LocalSet.await` runs spawned tasks until the set is idle ([#1971]).- `time::DelayQueue::len` returns the number entries in the queue ([#1755]).- expose runtime options from the `#[tokio::main]` and `#[tokio::test]` ([#2022]).[#1699]: https://github.com/tokio-rs/tokio/pull/1699[#1755]: https://github.com/tokio-rs/tokio/pull/1755[#1870]: https://github.com/tokio-rs/tokio/pull/1870[#1971]: https://github.com/tokio-rs/tokio/pull/1971[#2001]: https://github.com/tokio-rs/tokio/pull/2001[#2005]: https://github.com/tokio-rs/tokio/pull/2005[#2006]: https://github.com/tokio-rs/tokio/pull/2006[#2011]: https://github.com/tokio-rs/tokio/pull/2011[#2012]: https://github.com/tokio-rs/tokio/pull/2012[#2014]: https://github.com/tokio-rs/tokio/pull/2014[#2022]: https://github.com/tokio-rs/tokio/pull/2022[#2025]: https://github.com/tokio-rs/tokio/pull/2025[#2029]: https://github.com/tokio-rs/tokio/pull/2029[#2034]: https://github.com/tokio-rs/tokio/pull/2034[#2035]: https://github.com/tokio-rs/tokio/pull/2035[#2040]: https://github.com/tokio-rs/tokio/pull/2040[#2045]: https://github.com/tokio-rs/tokio/pull/2045[#2059]: https://github.com/tokio-rs/tokio/pull/2059# 0.2.6 (December 19, 2019)### Fixes- `fs::File::seek` API regression ([#1991]).[#1991]: https://github.com/tokio-rs/tokio/pull/1991# 0.2.5 (December 18, 2019)### Added- `io::AsyncSeek` trait ([#1924]).- `Mutex::try_lock` ([#1939])- `mpsc::Receiver::try_recv` and `mpsc::UnboundedReceiver::try_recv` ([#1939]).- `writev` support for `TcpStream` ([#1956]).- `time::throttle` for throttling streams ([#1949]).- implement `Stream` for `time::DelayQueue` ([#1975]).- `sync::broadcast` provides a fan-out channel ([#1943]).- `sync::Semaphore` provides an async semaphore ([#1973]).- `stream::StreamExt` provides stream utilities ([#1962]).### Fixes- deadlock risk while shutting down the runtime ([#1972]).- panic while shutting down the runtime ([#1978]).- `sync::MutexGuard` debug output ([#1961]).- misc doc improvements ([#1933], [#1934], [#1940], [#1942]).### Changes- runtime threads are configured with `runtime::Builder::core_threads` and  `runtime::Builder::max_threads`. `runtime::Builder::num_threads` is  deprecated ([#1977]).[#1924]: https://github.com/tokio-rs/tokio/pull/1924[#1933]: https://github.com/tokio-rs/tokio/pull/1933[#1934]: https://github.com/tokio-rs/tokio/pull/1934[#1939]: https://github.com/tokio-rs/tokio/pull/1939[#1940]: https://github.com/tokio-rs/tokio/pull/1940[#1942]: https://github.com/tokio-rs/tokio/pull/1942[#1943]: https://github.com/tokio-rs/tokio/pull/1943[#1949]: https://github.com/tokio-rs/tokio/pull/1949[#1956]: https://github.com/tokio-rs/tokio/pull/1956[#1961]: https://github.com/tokio-rs/tokio/pull/1961[#1962]: https://github.com/tokio-rs/tokio/pull/1962[#1972]: https://github.com/tokio-rs/tokio/pull/1972[#1973]: https://github.com/tokio-rs/tokio/pull/1973[#1975]: https://github.com/tokio-rs/tokio/pull/1975[#1977]: https://github.com/tokio-rs/tokio/pull/1977[#1978]: https://github.com/tokio-rs/tokio/pull/1978# 0.2.4 (December 6, 2019)### Fixes- `sync::Mutex` deadlock when `lock()` future is dropped early ([#1898]).[#1898]: https://github.com/tokio-rs/tokio/pull/1898# 0.2.3 (December 6, 2019)### Added- read / write integers using `AsyncReadExt` and `AsyncWriteExt` ([#1863]).- `read_buf` / `write_buf` for reading / writing `Buf` / `BufMut` ([#1881]).- `TcpStream::poll_peek` - pollable API for performing TCP peek ([#1864]).- `sync::oneshot::error::TryRecvError` provides variants to detect the error  kind ([#1874]).- `LocalSet::block_on` accepts `!'static` task ([#1882]).- `task::JoinError` is now `Sync` ([#1888]).- impl conversions between `tokio::time::Instant` and  `std::time::Instant` ([#1904]).### Fixes- calling `spawn_blocking` after runtime shutdown ([#1875]).- `LocalSet` drop infinite loop ([#1892]).- `LocalSet` hang under load ([#1905]).- improved documentation ([#1865], [#1866], [#1868], [#1874], [#1876], [#1911]).[#1863]: https://github.com/tokio-rs/tokio/pull/1863[#1864]: https://github.com/tokio-rs/tokio/pull/1864[#1865]: https://github.com/tokio-rs/tokio/pull/1865[#1866]: https://github.com/tokio-rs/tokio/pull/1866[#1868]: https://github.com/tokio-rs/tokio/pull/1868[#1874]: https://github.com/tokio-rs/tokio/pull/1874[#1875]: https://github.com/tokio-rs/tokio/pull/1875[#1876]: https://github.com/tokio-rs/tokio/pull/1876[#1881]: https://github.com/tokio-rs/tokio/pull/1881[#1882]: https://github.com/tokio-rs/tokio/pull/1882[#1888]: https://github.com/tokio-rs/tokio/pull/1888[#1892]: https://github.com/tokio-rs/tokio/pull/1892[#1904]: https://github.com/tokio-rs/tokio/pull/1904[#1905]: https://github.com/tokio-rs/tokio/pull/1905[#1911]: https://github.com/tokio-rs/tokio/pull/1911# 0.2.2 (November 29, 2019)### Fixes- scheduling with `basic_scheduler` ([#1861]).- update `spawn` panic message to specify that a task scheduler is required ([#1839]).- API docs example for `runtime::Builder` to include a task scheduler ([#1841]).- general documentation ([#1834]).- building on illumos/solaris ([#1772]).- panic when dropping `LocalSet` ([#1843]).- API docs mention the required Cargo features for `Builder::{basic, threaded}_scheduler` ([#1858]).### Added- impl `Stream` for `signal::unix::Signal` ([#1849]).- API docs for platform specific behavior of `signal::ctrl_c` and `signal::unix::Signal` ([#1854]).- API docs for `signal::unix::Signal::{recv, poll_recv}` and `signal::windows::CtrlBreak::{recv, poll_recv}` ([#1854]).- `File::into_std` and `File::try_into_std` methods ([#1856]).[#1772]: https://github.com/tokio-rs/tokio/pull/1772[#1834]: https://github.com/tokio-rs/tokio/pull/1834[#1839]: https://github.com/tokio-rs/tokio/pull/1839[#1841]: https://github.com/tokio-rs/tokio/pull/1841[#1843]: https://github.com/tokio-rs/tokio/pull/1843[#1849]: https://github.com/tokio-rs/tokio/pull/1849[#1854]: https://github.com/tokio-rs/tokio/pull/1854[#1856]: https://github.com/tokio-rs/tokio/pull/1856[#1858]: https://github.com/tokio-rs/tokio/pull/1858[#1861]: https://github.com/tokio-rs/tokio/pull/1861# 0.2.1 (November 26, 2019)### Fixes- API docs for `TcpListener::incoming`, `UnixListener::incoming` ([#1831]).### Added- `tokio::task::LocalSet` provides a strategy for spawning `!Send` tasks ([#1733]).- export `tokio::time::Elapsed` ([#1826]).- impl `AsRawFd`, `AsRawHandle` for `tokio::fs::File` ([#1827]).[#1733]: https://github.com/tokio-rs/tokio/pull/1733[#1826]: https://github.com/tokio-rs/tokio/pull/1826[#1827]: https://github.com/tokio-rs/tokio/pull/1827[#1831]: https://github.com/tokio-rs/tokio/pull/1831# 0.2.0 (November 26, 2019)A major breaking change. Most implementation and APIs have changed one way oranother. This changelog entry contains a highlight### Changed- APIs are updated to use `async / await`.- most `tokio-*` crates are collapsed into this crate.- Scheduler is rewritten.- `tokio::spawn` returns a `JoinHandle`.- A single I/O / timer is used per runtime.- I/O driver uses a concurrent slab for allocating state.- components are made available via feature flag.- Use `bytes` 0.5- `tokio::codec` is moved to `tokio-util`.### Removed- Standalone `timer` and `net` drivers are removed, use `Runtime` instead- `current_thread` runtime is removed, use `tokio::runtime::Runtime` with  `basic_scheduler` instead.# 0.1.21 (May 30, 2019)### Changed- Bump `tokio-trace-core` version to 0.2 ([#1111]).[#1111]: https://github.com/tokio-rs/tokio/pull/1111# 0.1.20 (May 14, 2019)### Added- `tokio::runtime::Builder::panic_handler` allows configuring handling  panics on the runtime ([#1055]).[#1055]: https://github.com/tokio-rs/tokio/pull/1055# 0.1.19 (April 22, 2019)### Added- Re-export `tokio::sync::Mutex` primitive ([#964]).[#964]: https://github.com/tokio-rs/tokio/pull/964# 0.1.18 (March 22, 2019)### Added- `TypedExecutor` re-export and implementations ([#993]).[#993]: https://github.com/tokio-rs/tokio/pull/993# 0.1.17 (March 13, 2019)### Added- Propagate trace subscriber in the runtime ([#966]).[#966]: https://github.com/tokio-rs/tokio/pull/966# 0.1.16 (March 1, 2019)### Fixed- async-await: track latest nightly changes ([#940]).### Added- `sync::Watch`, a single value broadcast channel ([#922]).- Async equivalent of read / write file helpers being added to `std` ([#896]).[#896]: https://github.com/tokio-rs/tokio/pull/896[#922]: https://github.com/tokio-rs/tokio/pull/922[#940]: https://github.com/tokio-rs/tokio/pull/940# 0.1.15 (January 24, 2019)### Added- Re-export tokio-sync APIs ([#839]).- Stream enumerate combinator ([#832]).[#832]: https://github.com/tokio-rs/tokio/pull/832[#839]: https://github.com/tokio-rs/tokio/pull/839# 0.1.14 (January 6, 2019)- Use feature flags to break up the crate, allowing users to pick & choose  components ([#808]).- Export `UnixDatagram` and `UnixDatagramFramed` ([#772]).[#772]: https://github.com/tokio-rs/tokio/pull/772[#808]: https://github.com/tokio-rs/tokio/pull/808# 0.1.13 (November 21, 2018)- Fix `Runtime::reactor()` when no tasks are spawned ([#721]).- `runtime::Builder` no longer uses deprecated methods ([#749]).- Provide `after_start` and `before_stop` configuration settings for  `Runtime` ([#756]).- Implement throttle stream combinator ([#736]).[#721]: https://github.com/tokio-rs/tokio/pull/721[#736]: https://github.com/tokio-rs/tokio/pull/736[#749]: https://github.com/tokio-rs/tokio/pull/749[#756]: https://github.com/tokio-rs/tokio/pull/756# 0.1.12 (October 23, 2018)- runtime: expose `keep_alive` on runtime builder ([#676]).- runtime: create a reactor per worker thread ([#660]).- codec: fix panic in `LengthDelimitedCodec` ([#682]).- io: re-export `tokio_io::io::read` function ([#689]).- runtime: check for executor re-entry in more places ([#708]).[#660]: https://github.com/tokio-rs/tokio/pull/660[#676]: https://github.com/tokio-rs/tokio/pull/676[#682]: https://github.com/tokio-rs/tokio/pull/682[#689]: https://github.com/tokio-rs/tokio/pull/689[#708]: https://github.com/tokio-rs/tokio/pull/708# 0.1.11 (September 28, 2018)- Fix `tokio-async-await` dependency ([#675]).[#675]: https://github.com/tokio-rs/tokio/pull/675# 0.1.10 (September 27, 2018)- Fix minimal versions# 0.1.9 (September 27, 2018)- Experimental async/await improvements ([#661]).- Re-export `TaskExecutor` from `tokio-current-thread` ([#652]).- Improve `Runtime` builder API ([#645]).- `tokio::run` panics when called from the context of an executor  ([#646]).- Introduce `StreamExt` with a `timeout` helper ([#573]).- Move `length_delimited` into `tokio` ([#575]).- Re-organize `tokio::net` module ([#548]).- Re-export `tokio-current-thread::spawn` in current_thread runtime  ([#579]).[#548]: https://github.com/tokio-rs/tokio/pull/548[#573]: https://github.com/tokio-rs/tokio/pull/573[#575]: https://github.com/tokio-rs/tokio/pull/575[#579]: https://github.com/tokio-rs/tokio/pull/579[#645]: https://github.com/tokio-rs/tokio/pull/645[#646]: https://github.com/tokio-rs/tokio/pull/646[#652]: https://github.com/tokio-rs/tokio/pull/652[#661]: https://github.com/tokio-rs/tokio/pull/661# 0.1.8 (August 23, 2018)- Extract tokio::executor::current_thread to a sub crate ([#370])- Add `Runtime::block_on` ([#398])- Add `runtime::current_thread::block_on_all` ([#477])- Misc documentation improvements ([#450])- Implement `std::error::Error` for error types ([#501])[#370]: https://github.com/tokio-rs/tokio/pull/370[#398]: https://github.com/tokio-rs/tokio/pull/398[#450]: https://github.com/tokio-rs/tokio/pull/450[#477]: https://github.com/tokio-rs/tokio/pull/477[#501]: https://github.com/tokio-rs/tokio/pull/501# 0.1.7 (June 6, 2018)- Add `Runtime::block_on` for concurrent runtime ([#391]).- Provide handle to `current_thread::Runtime` that allows spawning tasks from  other threads ([#340]).- Provide `clock::now()`, a configurable source of time ([#381]).[#340]: https://github.com/tokio-rs/tokio/pull/340[#381]: https://github.com/tokio-rs/tokio/pull/381[#391]: https://github.com/tokio-rs/tokio/pull/391# 0.1.6 (May 2, 2018)- Add asynchronous filesystem APIs ([#323]).- Add "current thread" runtime variant ([#308]).- `CurrentThread`: Expose inner `Park` instance.- Improve fairness of `CurrentThread` executor ([#313]).[#308]: https://github.com/tokio-rs/tokio/pull/308[#313]: https://github.com/tokio-rs/tokio/pull/313[#323]: https://github.com/tokio-rs/tokio/pull/323# 0.1.5 (March 30, 2018)- Provide timer API ([#266])[#266]: https://github.com/tokio-rs/tokio/pull/266# 0.1.4 (March 22, 2018)- Fix build on FreeBSD ([#218])- Shutdown the Runtime when the handle is dropped ([#214])- Set Runtime thread name prefix for worker threads ([#232])- Add builder for Runtime ([#234])- Extract TCP and UDP types into separate crates ([#224])- Optionally support futures 0.2.[#214]: https://github.com/tokio-rs/tokio/pull/214[#218]: https://github.com/tokio-rs/tokio/pull/218[#224]: https://github.com/tokio-rs/tokio/pull/224[#232]: https://github.com/tokio-rs/tokio/pull/232[#234]: https://github.com/tokio-rs/tokio/pull/234# 0.1.3 (March 09, 2018)- Fix `CurrentThread::turn` to block on idle ([#212]).[#212]: https://github.com/tokio-rs/tokio/pull/212# 0.1.2 (March 09, 2018)- Introduce Tokio Runtime ([#141])- Provide `CurrentThread` for more flexible usage of current thread executor ([#141]).- Add Lio for platforms that support it ([#142]).- I/O resources now lazily bind to the reactor ([#160]).- Extract Reactor to dedicated crate ([#169])- Add facade to sub crates and add prelude ([#166]).- Switch TCP/UDP fns to poll\_ -> Poll<...> style ([#175])[#141]: https://github.com/tokio-rs/tokio/pull/141[#142]: https://github.com/tokio-rs/tokio/pull/142[#160]: https://github.com/tokio-rs/tokio/pull/160[#166]: https://github.com/tokio-rs/tokio/pull/166[#169]: https://github.com/tokio-rs/tokio/pull/169[#175]: https://github.com/tokio-rs/tokio/pull/175# 0.1.1 (February 09, 2018)- Doc fixes# 0.1.0 (February 07, 2018)- Initial crate released based on [RFC](https://github.com/tokio-rs/tokio-rfcs/pull/3).