# 0.7.1
## Reduced support for 32-bit Apple targets
In January 2020 Rust reduced its support for 32-bit Apple targets
(https://blog.rust-lang.org/2020/01/03/reducing-support-for-32-bit-apple-targets.html).
Starting with v0.7.1 Mio will do the same as we're no longer checking 32 bit
iOS/macOS on our CI.
## Added
* Support for illumos
(https://github.com/tokio-rs/mio/commit/976f2354d0e8fbbb64fba3bf017d7131f9c369a0).
* Report `epoll(2)`'s `EPOLLERR` event as `Event::is_write_closed` if it's the
only event
(https://github.com/tokio-rs/mio/commit/0c77b5712d675eeb9bd43928b5dd7d22b2c7ac0c).
* Optimised event::Iter::{size_hint, count}
(https://github.com/tokio-rs/mio/commit/40df934a11b05233a7796c4de19a4ee06bc4e03e).
## Fixed
* Work around Linux kernel < 2.6.37 bug on 32-bits making timeouts longer then
~30 minutes effectively infinite
(https://github.com/tokio-rs/mio/commit/d555991f5ee81f6c1eec0fe481557d3d5b8d5ff4).
* Set `SO_NOSIGPIPE` on all sockets (not just UDP) on for Apple targets
(https://github.com/tokio-rs/mio/commit/b8bbdcb0d3236f4c4acb257996d42a88dc9987d9).
* Properly handle `POLL_ABORT` on Windows
(https://github.com/tokio-rs/mio/commit/a98da62b3ed1eeed1770aaca12f46d647e4fa749).
* Improved error handling around failing `SIO_BASE_HANDLE` calls on Windows
(https://github.com/tokio-rs/mio/commit/b15fc18458a79ef8a51f73effa92548650f4e5dc).
## Changed
* On NetBSD we now use `accept4(2)`
(https://github.com/tokio-rs/mio/commit/4e306addc7144f2e02a7e8397c220b179a006a19).
* The package uploaded to crates.io should be slightly smaller
(https://github.com/tokio-rs/mio/commit/eef8d3b9500bc0db957cd1ac68ee128ebc68351f).
## Removed
* Dependency on `lazy_static` on Windows
(https://github.com/tokio-rs/mio/commit/57e4c2a8ac153bc7bb87829e22cf0a21e3927e8a).
# 0.7.0
Version 0.7 of Mio contains various major changes compared to version 0.6.
Overall a large number of API changes have been made to reduce the complexity of
the implementation and remove overhead where possible.
Please refer to the [blog post about
0.7-alpha.1](https://tokio.rs/blog/2019-12-mio-v0.7-alpha.1/) for additional
information.
## Added
* `Interest` structure that replaces `Ready` in registering event sources.
* `Registry` structure that separates the registering and polling functionality.
* `Waker` structure that allows another thread to wake a thread polling `Poll`.
* Unix Domain Socket (UDS) types: `UnixDatagram`, `UnixListener` and
`UnixStream`.
## Removed
* All code deprecated in 0.6 was removed in 0.7.
* Support for Fuchsia was removed as the code was unmaintained.
* Support for Bitrig was removed, rustc dropped support for it also.
* `UnixReady` was merged into `Ready`.
* Custom user-space readiness queue was removed, this includes the public
`Registration` and `SetReadiness` types.
* `PollOpt` was removed and all registrations use edge-triggers. See the upgrade
guide on how to process event using edge-triggers.
* The network types (types in the `net` module) now support only the same API as
found in the standard library, various methods on the types were removed.
* `TcpStream` now supports vectored I/O.
* `Poll::poll_interruptible` was removed. Instead `Poll::poll` will now return
an error if one occurs.
* `From<usize>` is removed from `Token`, the internal field is still public, so
`Token(my_token)` can still be used.
## Changed
* Various documentation improvements were made around correct usage of `Poll`
and registered event sources. It is recommended to reread the documentation of
at least `event::Source` and `Poll`.
* Mio now uses Rust 2018 and rustfmt for all code.
* `Event` was changed to be a wrapper around the OS event. This means it can be
significantly larger on some OSes.
* `Ready` was removed and replaced with various `is_*` methods on `Event`. For
example instead checking for readable readiness using
`Event::ready().is_readable()`, you would call `Event::is_readable()`.
* `Ready::is_hup` was removed in favour of `Event::is_read_closed` and
`Event::is_write_closed`.
* The Iterator implementation of `Events` was changed to return `&Event`.
* `Evented` was renamed to `event::Source` and now takes mutable reference to
the source.
* Minimum supported Rust version was increased to 1.39.
* By default Mio now uses a shim implementation. To enable the full
implementation, that uses the OS, enable the `os-oll` feature. To enable the
network types use `tcp`, `udp` and/or `uds`. For more documentation on the
features see the `feature` module in the API documentation (requires the
`extra-docs` feature).
* The entire Windows implementation was rewritten.
* Various optimisation were made to reduce the number of system calls in
creating and using sockets, e.g. making use of `accept4(2)`.
* The `fmt::Debug` implementation of `Events` is now actually useful as it
prints all `Event`s.
# 0.6.19 (May 28, 2018)
### Fixed
- Do not trigger HUP events on kqueue platforms (#958).
# 0.6.18 (May 24, 2018)
### Fixed
- Fix compilation on kqueue platforms with 32bit C long (#948).
# 0.6.17 (May 15, 2018)
### Fixed
- Don't report `RDHUP` as `HUP` (#939)
- Fix lazycell related compilation issues.
- Fix EPOLLPRI conflicting with READABLE
- Abort process on ref count overflows
### Added
- Define PRI on all targets
# 0.6.16 (September 5, 2018)
* Add EPOLLPRI readiness to UnixReady on supported platforms (#867)
* Reduce spurious awaken calls (#875)
# 0.6.15 (July 3, 2018)
* Implement `Evented` for containers (#840).
* Fix android-aarch64 build (#850).
# 0.6.14 (March 8, 2018)
* Add `Poll::poll_interruptible` (#811)
* Add `Ready::all` and `usize` conversions (#825)
# 0.6.13 (February 5, 2018)
* Fix build on DragonFlyBSD.
* Add `TcpListener::from_std` that does not require the socket addr.
* Deprecate `TcpListener::from_listener` in favor of from_std.
# 0.6.12 (January 5, 2018)
* Add `TcpStream::peek` function (#773).
* Raise minimum Rust version to 1.18.0.
* `Poll`: retry select() when interrupted by a signal (#742).
* Deprecate `Events` index access (#713).
* Add `Events::clear` (#782).
* Add support for `lio_listio` (#780).
# 0.6.11 (October 25, 2017)
* Allow register to take empty interest (#640).
* Fix bug with TCP errors on windows (#725).
* Add TcpListener::accept_std (#733).
* Update IoVec to fix soundness bug -- includes behavior change. (#747).
* Minimum Rust version is now 1.14.0.
* Fix Android x86_64 build.
* Misc API & doc polish.
# 0.6.10 (July 27, 2017)
* Experimental support for Fuchsia
* Add `only_v6` option for UDP sockets
* Fix build on NetBSD
* Minimum Rust version is now 1.13.0
* Assignment operators (e.g. `|=`) are now implemented for `Ready`
# 0.6.9 (June 7, 2017)
* More socket options are exposed through the TCP types, brought in through the
`net2` crate.
# 0.6.8 (May 26, 2017)
* Support Fuchia
* POSIX AIO support
* Fix memory leak caused by Register::new2
* Windows: fix handling failed TCP connections
* Fix build on aarch64-linux-android
* Fix usage of `O_CLOEXEC` with `SETFL`
# 0.6.7 (April 27, 2017)
* Ignore EPIPE coming out of `kevent`
* Timer thread should exit when timer is dropped.
# 0.6.6 (March 22, 2017)
* Add send(), recv() and connect() to UDPSocket.
* Fix bug in custom readiness queue
* Move net types into `net` module
# 0.6.5 (March 14, 2017)
* Misc improvements to kqueue bindings
* Add official support for iOS, Android, BSD
* Reimplement custom readiness queue
* `Poll` is now `Sync`
* Officially deprecate non-core functionality (timers, channel, etc...)
* `Registration` now implements `Evented`
* Fix bug around error conditions with `connect` on windows.
* Use iovec crate for scatter / gather operations
* Only support readable and writable readiness on all platforms
* Expose additional readiness in a platform specific capacity
# 0.6.4 (January 24, 2017)
* Fix compilation on musl
* Add `TcpStream::from_stream` which converts a std TCP stream to Mio.
# 0.6.3 (January 22, 2017)
* Implement readv/writev for `TcpStream`, allowing vectored reads/writes to
work across platforms
* Remove `nix` dependency
* Implement `Display` and `Error` for some channel error types.
* Optimize TCP on Windows through `SetFileCompletionNotificationModes`
# 0.6.2 (December 18, 2016)
* Allow registration of custom handles on Windows (like `EventedFd` on Unix)
* Send only one byte for the awakener on Unix instead of four
* Fix a bug in the timer implementation which caused an infinite loop
# 0.6.1 (October 30, 2016)
* Update dependency of `libc` to 0.2.16
* Fix channel `dec` logic
* Fix a timer bug around timeout cancellation
* Don't allocate buffers for TCP reads on Windows
* Touched up documentation in a few places
* Fix an infinite looping timer thread on OSX
* Fix compile on 32-bit OSX
* Fix compile on FreeBSD
# 0.6.0 (September 2, 2016)
* Shift primary API towards `Poll`
* `EventLoop` and types to `deprecated` mod. All contents of the
`deprecated` mod will be removed by Mio 1.0.
* Increase minimum supported Rust version to 1.9.0
* Deprecate unix domain socket implementation in favor of using a
version external to Mio. For example: https://github.com/alexcrichton/mio-uds.
* Remove various types now included in `std`
* Updated TCP & UDP APIs to match the versions in `std`
* Enable implementing `Evented` for any type via `Registration`
* Rename `IoEvent` -> `Event`
* Access `Event` data via functions vs. public fields.
* Expose `Events` as a public type that is passed into `Poll`
* Use `std::time::Duration` for all APIs that require a time duration.
* Polled events are now retrieved via `Events` type.
* Implement `std::error::Error` for `TimerError`
* Relax `Send` bound on notify messages.
* Remove `Clone` impl for `Timeout` (future proof)
* Remove `mio::prelude`
* Remove `mio::util`
* Remove dependency on bytes
# 0.5.0 (December 3, 2015)
* Windows support (#239)
* NetBSD support (#306)
* Android support (#295)
* Don't re-export bytes types
* Renamed `EventLoop::register_opt` to `EventLoop::register` (#257)
* `EventLoopConfig` is now a builder instead of having public struct fields. It
is also no longer `Copy`. (#259)
* `TcpSocket` is no longer exported in the public API (#262)
* Integrate with net2. (#262)
* `TcpListener` now returns the remote peer address from `accept` as well (#275)
* The `UdpSocket::{send_to, recv_from}` methods are no longer generic over `Buf`
or `MutBuf` but instead take slices directly. The return types have also been
updated to return the number of bytes transferred. (#260)
* Fix bug with kqueue where an error on registration prevented the
changelist from getting flushed (#276)
* Support sending/receiving FDs over UNIX sockets (#291)
* Mio's socket types are permanently associated with an EventLoop (#308)
* Reduce unnecessary poll wakeups (#314)
# 0.4.1 (July 21, 2015)
* [BUGFIX] Fix notify channel concurrency bug (#216)
# 0.4.0 (July 16, 2015)
* [BUGFIX] EventLoop::register requests all events, not just readable.
* [BUGFIX] Attempting to send a message to a shutdown event loop fails correctly.
* [FEATURE] Expose TCP shutdown
* [IMPROVEMENT] Coalesce readable & writable into `ready` event (#184)
* [IMPROVEMENT] Rename TryRead & TryWrite function names to avoid conflict with std.
* [IMPROVEMENT] Provide TCP and UDP types in Mio (path to windows #155)
* [IMPROVEMENT] Use clock_ticks crate instead of time (path to windows #155)
* [IMPROVEMENT] Move unix specific features into mio::unix module
* [IMPROVEMENT] TcpListener sets SO_REUSEADDR by default