Tokio v0.3.1

This release fixes a 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 crate
is 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).

Tokio v0.3.0

This represents a 1.0 beta release. APIs are polished and future-proofed. APIs not 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 combied 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).

Tokio v0.2.22

This release introduces initial support for tracing instrumentation within the Tokio
runtime, enabled by the "tracing" feature flag. In addition, it contains a number of bug
fixes and API additions.

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)

Signed-off-by: Eliza Weisman eliza@buoyant.io

Tokio v0.2.21

Bug fixes and API polish.

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).

Tokio v0.2.20

Fixes

• sync: broadcast closing the channel no longer requires capacity (#2448).
• rt: regression when configuring runtime with max_threads less than the number of CPUs (#2457).

Tokio v0.2.19

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).

Tokio v0.2.18

Fixes a regression with LocalSet that allowed !Send futures to cross threads.

This change makes LocalSet !Send. The Send implementation was accidentally added in v0.2.14. Removing the Send implementation is not considered a breaking change as it fixes a soundness bug and the implementation was accidental.

Fixes

• task: LocalSet was incorrectly marked as Send (#2398)
• io: correctly report WriteZero failure in write_int (#2334)

Tokio 0.2.17

This release fixes a bug in the threaded scheduler that could result in panics under load (see #2382). Additionally, the default number of worker threads now uses the logical CPU count, so it will now respect scheduler affinity and cgroups CPU quotas.

Fixes

• rt: bug in work-stealing queue (#2387)

Changes

• rt: threadpool uses logical CPU count instead of physical by default (#2391)

Tokio 0.2.16

This release fixes a regression in tokio::sync and a bug in tokio::fs::copy. It also
adds a new APIs to tokio::time and tokio::io.

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)

Tokio v0.2.15

Fixes a queue regression and adds a new disarm fn to mpsc::Sender.

Fixes

• rt: fix queue regression (#2362).

Added

• sync: Add disarm to mpsc::Sender (#2358).