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)

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)

1.25.2 (September 22, 2023)

Forward ports 1.20.6 changes.

Changed

• io: use memchr from libc (#5960)

1.20.6 (September 22, 2023)

This is a backport of a change from 1.27.0.

Changed

• io: use memchr from libc (#5960)

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 the scalability of alt runtime as the number of cores grows (#5935)

Fixed

• io: delegate WriteHalf::poll_write_vectored (#5914)

Unstable

• rt(unstable): fix memory leak in unstable next-gen scheduler prototype (#5911)
• rt: expose mean task poll time metric (#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)

Fixed

• rt: fix nesting two block_in_place with a block_on between (#5837)

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)

1.28.2 (May 28, 2023)

Forward ports 1.18.6 changes.

Fixed

• deps: disable default features for mio (#5728)