cargo / mio / audit
cargo : mio @ 0.8.11
PE Patrick Elsen signed 2026-05-27 published 2026-05-27

CHANGELOG.md

690 lines · markdown

# 0.8.11* Fix receiving IOCP events after deregistering a Windows named pipe  (https://github.com/tokio-rs/mio/pull/1760, backport pr:  https://github.com/tokio-rs/mio/pull/1761).# 0.8.10## Added* Solaris support  (https://github.com/tokio-rs/mio/pull/1724).# 0.8.9## Added* ESP-IDF framework support  (https://github.com/tokio-rs/mio/pull/1692).* AIX operating system support  (https://github.com/tokio-rs/mio/pull/1704).* Vita support  (https://github.com/tokio-rs/mio/pull/1721).* `{UnixListener,UnixStream}:bind_addr`  (https://github.com/tokio-rs/mio/pull/1630).* `mio_unsupported_force_poll_poll` and `mio_unsupported_force_waker_pipe`  **unsupported** configuration flags to force a specific poll or waker  implementation  (https://github.com/tokio-rs/mio/pull/1684,  https://github.com/tokio-rs/mio/pull/1685,  https://github.com/tokio-rs/mio/pull/1692).## Fixed* The `pipe(2)` based waker (swapped file descriptors)  (https://github.com/tokio-rs/mio/pull/1722).* The duplicate waker check to work correctly with cloned `Registry`s.  (https://github.com/tokio-rs/mio/pull/1706).# 0.8.8## Fixed* Fix compilation on WASI (https://github.com/tokio-rs/mio/pull/1676).# 0.8.7## Added* Add/fix support for tvOS and watchOS, Mio should now build for tvOS and  watchOS, but we don't have a CI setup yet  (https://github.com/tokio-rs/mio/pull/1658).## Changed* Made the `log` dependency optional behind the `log` feature flag (enabled by  default). Users that disabled Mio's default features will now not see any  logging from Mio, enabling the `log` feature will fix that. This was done in  response to the `log` crate increasing it's MSRV to v1.60, see  https://github.com/rust-lang/log/pull/552  (https://github.com/tokio-rs/mio/pull/1673).* Update windows-sys dependency to v0.48  (https://github.com/tokio-rs/mio/pull/1663).## Fixed* Fix overflow in `Poll::poll` when using `Duration::MAX` as timeout  (https://github.com/tokio-rs/mio/pull/1657).# 0.8.6## Added* `Interest::PRIORITY` on Linux and Android, to trigger `Event::is_priority`  (https://github.com/tokio-rs/mio/pull/1647).## Changed* Updated windows-sys to 0.45  (https://github.com/tokio-rs/mio/pull/1644).* We started testing with sanitizers on the CI  (https://github.com/tokio-rs/mio/pull/1648).## Fixed* A number of potential fd leaks when setup resulted in an error right after  creation (https://github.com/tokio-rs/mio/pull/1636).* Less truncating for timeout values in `Poll::poll`  (https://github.com/tokio-rs/mio/pull/1642).# 0.8.5## Changed* Updated `windows-sys` to 0.42.0  (https://github.com/tokio-rs/mio/pull/1624).* Officially document Wine as not supported, some people claimed it worked,  other claims it doesn't, but nobody stepped up to fix the problem  (https://github.com/tokio-rs/mio/pull/1596).* Switch to GitHub Actions  (https://github.com/tokio-rs/mio/pull/1598, https://github.com/tokio-rs/mio/pull/1601).* Documented the current Poll::poll time behaviour  (https://github.com/tokio-rs/mio/pull/1603).## Fixed* Timeout less than one millisecond becoming zero millsiconds  (https://github.com/tokio-rs/mio/pull/1615, https://github.com/tokio-rs/mio/pull/1616)* Undefined reference to `epoll\_create1` on Android API level < 21.  (https://github.com/tokio-rs/mio/pull/1590).# 0.8.4## Added* Support `Registery::try_clone` on `wasm32-wasi`  (https://github.com/tokio-rs/mio/pull/1576).* Add docs about polling without registering event sources  (https://github.com/tokio-rs/mio/pull/1585).# 0.8.3## Changed* Replace `winapi` dependency with `windows-sys`.  (https://github.com/tokio-rs/mio/pull/1556).* Future proofed the kevent ABI for FreeBSD  (https://github.com/tokio-rs/mio/pull/1572).## Fixed* Improved support for Redox, making it possible to run on stable Rust  (https://github.com/tokio-rs/mio/pull/1555).* Don't ignore EAGAIN in UDS connect call  (https://github.com/tokio-rs/mio/pull/1564).* Documentation of `TcpStream::connect`  (https://github.com/tokio-rs/mio/pull/1565).# 0.8.2## Added* Experimental support for Redox.# 0.8.1## Added* Add `try_io` method to all I/O types (#1551). This execute a user defined I/O  closure while updating Mio's internal state ensuring that the I/O type  receives more events if it hits a WouldBlock error. This is added to the  following types:   * `TcpStream`   * `UdpSocket`   * `UnixDatagram`   * `UnixStream`   * `unix::pipe::Sender`   * `unix::pipe::Receiver`* Basic, experimental support for `wasm32-wasi` target (#1549). Note that a lot  of time type are still missing, e.g. the `Waker`, and may never be possible to  implement.# 0.8.0## Removed* Deprecated features (https://github.com/tokio-rs/mio/commit/105f8f2afb57b01ddea716a0aa9720f226c520e3):  * extra-docs (always enabled)  * tcp (replaced with "net" feature).  * udp (replaced with "net" feature).  * uds (replaced with "net" feature).  * pipe (replaced with "os-ext" feature).  * os-util (replaced with "os-ext" feature).* `TcpSocket` type  (https://github.com/tokio-rs/mio/commit/02e9be41f27daf822575444fdd2b3067433a5996).  The socket2 crate provides all the functionality and more.* Support for Solaris, it never really worked anyway  (https://github.com/tokio-rs/mio/pull/1528).## Changes* Update minimum Rustc version (MSVR) to 1.46.0  (https://github.com/tokio-rs/mio/commit/5c577efecd23750a9a3e0f6ad080ab98f14a255d).## Added* `UdpSocket::peer_addr`  (https://github.com/tokio-rs/mio/commit/5fc104d08e0e74c8a19247f7cba0f058699fc438).# 0.7.14## Fixes* Remove use unsound internal macro (#1519).## Added* `sys::unix::SocketAddr::as_abstract_namespace()` (#1520).# 0.7.13## Fixes* Fix `Registry::try_clone` invalid usage of `F_DUPFD_CLOEXEC` (#1497,  https://github.com/tokio-rs/mio/commit/2883f5c1f35bf1a59682c5ffc4afe6b97d7d6e68).# 0.7.12 (yanked)## Fixes* Set `FD_CLOEXEC` when calling `Registry::try_clone`  (https://github.com/tokio-rs/mio/commit/d1617b567ff6bc669d71e367d22e0e93ff7e2e24 for epoll and  (https://github.com/tokio-rs/mio/commit/b367a05e408ca90a26383c3aa16d8a16f019dc59 for kqueue).# 0.7.11## Fixes* Fix missing feature of winapi.  (https://github.com/tokio-rs/mio/commit/a7e61db9e3c2b929ef1a33532bfcc22045d163ce).# 0.7.10## Fixes* Fix an instance of not doc(cfg(.*))  (https://github.com/tokio-rs/mio/commit/25e8f911357c740034f10a170dfa4ea1b28234ce).# 0.7.9## Fixes* Fix error handling in `NamedPipe::write`  (https://github.com/tokio-rs/mio/commit/aec872be9732e5c6685100674278be27f54a271b).* Use `accept(2)` on x86 Android instead of `accept4(2)`  (https://github.com/tokio-rs/mio/commit/6f86b925d3e48f30905d5cfa54348acf3f1fa036,  https://github.com/tokio-rs/mio/commit/8d5414880ab82178305ac1d2c16d715e58633d3e).* Improve error message when opening AFD device  (https://github.com/tokio-rs/mio/commit/139f7c4422321eb4a17b14ae2c296fddd19a8804).# 0.7.8## Fixes* Fix `TcpStream::set_linger` on macOS  (https://github.com/tokio-rs/mio/commit/175773ce02e85977db81224c782c8d140aba8543).* Fix compilation on DragonFlyBSD  (https://github.com/tokio-rs/mio/commit/b51af46b28871f8dd3233b490ee62237ffed6a26).# 0.7.7## Added* `UdpSocket::only_v6`  (https://github.com/tokio-rs/mio/commit/0101e05a800f17fb88f4315d9b9fe0f08cca6e57).* `Clone` implementation for `Event`  (https://github.com/tokio-rs/mio/commit/26540ebbae89df6d4d08465c56f715d8f2addfc3).* `AsRawFd` implementation for `Registry`  (https://github.com/tokio-rs/mio/commit/f70daa72da0042b1880256164774c3286d315a02).* `Read` and `Write` implementation for `&unix::pipe::Sender` and `Receiver`,  that is on the reference to them, an implementation existed on the types  themselves already  (https://github.com/tokio-rs/mio/commit/1be481dcbbcb6906364008b5d61e7f53cddc3eb3).## Fixes* Underflow in `SocketAddr::address`  (https://github.com/tokio-rs/mio/commit/6d3fa69240cd4bb95e9d34605c660c30245a18bd).* Android build with the net feature enabled, but with os-poll disabled  (https://github.com/tokio-rs/mio/commit/49d8fd33e026ad6e2c055d05d6667180ba2af7be).* Solaris build with the net feature enabled, but with os-poll disabled  (https://github.com/tokio-rs/mio/commit/a6e025e9d9511639ec106ebedc0dd312bdc9be12).* Ensure that `Waker::wake` works on illumos systems with poor `pipe(2)` and  `epoll(2)` interaction using `EPOLLET`  (https://github.com/tokio-rs/mio/commit/943d4249dcc17cd8b4d2250c4fa19116097248fa).* Fix `unix::pipe` on illumos  (https://github.com/tokio-rs/mio/commit/0db49f6d5caf54b12176821363d154384357e70a).# 0.7.6## Added* `net` feature, replaces `tcp`, `udp` and `uds` features  (https://github.com/tokio-rs/mio/commit/a301ba520a8479b459c4acdcefa4a7c5eea818c7).* `os-ext` feature, replaces `os-util` and `pipe` features  (https://github.com/tokio-rs/mio/commit/f5017fae8a3d3bb4b4cada25b01a2d76a406badc).* Added keepalive support to `TcpSocket`  (https://github.com/tokio-rs/mio/commit/290c43a96662d54ab7c4b8814e5a9f9a9e523fda).* `TcpSocket::set_{send, recv}_buffer_size`  (https://github.com/tokio-rs/mio/commit/40c4af79bf5b32b8fbdbf6f2e5c16290e1d3d406).* `TcpSocket::get_linger`  (https://github.com/tokio-rs/mio/commit/13e82ced655bbb6e2729226e485a7de9f2c2ccd9).* Implement `IntoRawFd` for `TcpSocket`  (https://github.com/tokio-rs/mio/commit/50548ed45d0b2c98f1f2e003e210d14195284ef4).## Deprecated* The `tcp`, `udp` and `uds` features, replaced by a new `net` feature.  (https://github.com/tokio-rs/mio/commit/a301ba520a8479b459c4acdcefa4a7c5eea818c7).* The `extra-docs` feature, now enabled by default.  (https://github.com/tokio-rs/mio/commit/25731e8688a2d91c5c700674a2c2d3841240ece1).* The `os-util` and `pipe` features, replaced by a new `os-ext` feature.  (https://github.com/tokio-rs/mio/commit/f5017fae8a3d3bb4b4cada25b01a2d76a406badc).## Fixes* Incorrect assumption of the layout of `std::net::SocketAddr`. Previously Mio  would assume that `SocketAddrV{4,6}` had the same layout as  `libc::sockaddr_in(6)`, however this is not guaranteed by the standard  library.  (https://github.com/tokio-rs/mio/commit/152e0751f0be1c9b0cbd6778645b76bcb0eba93c).* Also bumped the miow dependency to version 0.3.6 to solve the same problem as  above.# 0.7.5## Added* `TcpSocket::get_localaddr()` retrieves local address  (https://github.com/tokio-rs/mio/commit/b41a022b2242eef1969c70c8ba93e04c528dba47).* `TcpSocket::set_reuseport()` & `TcpSocket::get_reuseport()` configures and reads `SO_REUSEPORT`  (https://github.com/tokio-rs/mio/commit/183bbe409ab69cbf9db41d0263b41ec86202d9a0).* `unix:pipe()` a wrapper around pipe(2) sys call  (https://github.com/tokio-rs/mio/commit/2b7c0967a7362303946deb3d4ca2ae507af6c72d).* Add a check that a single Waker is active per Poll instance (only in debug mode)  (https://github.com/tokio-rs/mio/commit/f4874f28b32efcf4841691884c65a89734d96a56).* Added `Interest:remove()`  (https://github.com/tokio-rs/mio/commit/b8639c3d9ac07bb7e2e27685680c8a6510fa1357).# 0.7.4## Fixes* lost "socket closed" events on windows  (https://github.com/tokio-rs/mio/commit/50c299aca56c4a26e5ed20c283007239fbe6a7a7).## Added* `TcpSocket::set_linger()` configures SO_LINGER  (https://github.com/tokio-rs/mio/commit/3b4096565c1a879f651b8f8282ecdcbdbd5c92d3).# 0.7.3## Added* `TcpSocket` for configuring a TCP socket before connecting or listening  (https://github.com/tokio-rs/mio/commit/5b09e60d0f64419b989bda88c86a3147334a03b3).# 0.7.2## Added* Windows named pipe support.  (https://github.com/tokio-rs/mio/commit/52e8c2220e87696d20f13561402bcaabba4136ed).# 0.7.1## Reduced support for 32-bit Apple targetsIn 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 bitiOS/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).# 0.7.0Version 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 ofthe implementation and remove overhead where possible.Please refer to the [blog post about0.7-alpha.1](https://tokio.rs/blog/2019-12-mio-v0.7-alpha.1/) for additionalinformation.## 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.# 0.6.23 (Dec 01, 2020)### Changed- **MSRV**: Increased the MSRV from 1.18.0 (Jun 8, 2017) to 1.31.0 (Dec 6,  2018)  (https://github.com/tokio-rs/mio/commit/4879e0d32ddfd98e762fc87240e594a3ad8fca30).### 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/e7cba59950e9c9fa6194e29b5b1e72029e3df455).- Update miow and net2 depedencies to get rid of invalid memory layout assumption  (https://github.com/tokio-rs/mio/commit/13f02ac0a86d7c0c0001e5ff8960a0b4340d075c).# 0.6.22 (May 01, 2020)### Added- Add support for illumos target (#1294)# 0.6.21 (November 27, 2019)### Fixed- remove `=` dependency on `cfg-if`.# 0.6.20 (November 21, 2019)### Fixed- Use default IOCP concurrency value (#1161).- setting FD_CLOEXEC in pipe (#1095).# 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