SwiftNIO 2.56.0

SPI(AsyncChannel) changes

• 🚨Breaking change: Add configuration for NIOAsyncChannel (#2464)
• Async support for NIOPipeBootstrap (#2458)
• Async support for NIORawSocketBootstrap (#2460)

Other Changes

• Remove XCTAsyncTest usage (#2461)
• Restructure Package.swift (#2462)

SwiftNIO 2.55.0

SemVer Minor

• Make NIO[Throwing]AsyncSequenceProducer.Source Sendable (#2459)

SemVer Patch

• Add support for Musl libc (#2449)
• Close Channel when input & output are closed (#2450)
• Correct a few Musl additions from #2449 for Android, plus error if libc not found (#2451, patch credit to @finagolfin)
• Use #if canImport(Darwin) where possible (#2446)

Other Changes

• Update RediStack URL in README.md (#2445)
• Allow opt-out of PII in CONTRIBUTORS.txt (#2453, patch credit to @therealbnut)
• Update mailmap to unify Gwynne's email addresses (#2454, patch credit to @gwynne)
• Fix several minor typos in comments found in various files (#2455, patch credit to @gwynne)
• Fix last remaining test on Android (#2457, patch credit to @finagolfin)
• Adopt the Swift CoC (#2440)
• Updated allocation counters in 5.9 (#2456)

SPI(AsyncChannel) changes

• Add NIOAsyncChannel based connect methods to ClientBootstrap (#2437)
• Add NIOAsyncChannel based connect and bind methods to DatagramBootstrap (#2439)
• 🚨Breaking change: Align ServerBootstrap bind methods with the initializer style (#2443)

SwiftNIO 2.54.0

SemVer Minor

• EmbeddedChannel: getOption(ChannelOptions.allowRemoteHalfClosure) should not fatalError (#2429)

SemVer Patch

• Pooled control message storage. (#2422, patch credit to @ser-0xff)
• NIOPOSIX happy eyeballs now hops to the connection event loop when using a custom resolver to avoid data races (#2436)

Other Changes

• Add tests for WebSocketMaskingKey.random() (#2433, patch credit to @gwynne)
• Add narrative documentation for NIO's concurrency bridges (#2423)
• Include relevant versions (kernel & Swift) in test output (#2425)
• Update update-alloc-limits-... script (#2430)
• Fix flaky test in NIOAsyncWriter (#2431)

SwiftNIO 2.53.0

SemVer Minor

• addition of assertSuccess() and assertFailure() on EventLoopFuture (#2417, patch credit to @dkz2)

SemVer Patch

• Tolerate sending data after close(mode: .output) (#2421)

SwiftNIO 2.52.0

SemVer Minor

• Add CustomDebugStringConvertible conformance to ByteBuffer (#2418, patch credit to @gwynne)
• Add unprocessedBytes property on NIOSingleStepByteToMessageProcessor (#2419)

SwiftNIO 2.51.1

SemVer Patch

• Handle close(output) in the pipeline handler. (#2414)
• NIOThrowingAsyncSequenceProducer throws when cancelled (#2415)

Other Changes

• Add AsyncChannel based ServerBootstrap.bind() methods (#2403)
• Extend the integration test harness to track FDs (#2411)
• AsyncChannelBootstrapTests bind to 0 instead (#2412, #2413)

SwiftNIO 2.51.0

SemVer Minor

• Drop Swift 5.5 (#2406)

SemVer Patch

• Handle reentrant reads in ALPNHandler (#2402)
• Close accepted FDs if we fail to create Socket (#2407)
• Don't have channels stop reading on errors they tolerate. (#2408)

Other Changes

• Add docker-compose file for Swift 5.9 (#2404)
• Fix broken docs. (#2405)
• Avoid double-closing on fcntl failures (#2409)

SwiftNIO 2.50.0

SemVer Minor

• Add NIOAsyncChannel as SPI (@_spi(AsyncChannel)) (#2397)
• Throw CancellationError if NIOThrowingAsyncSequenceProducer.AsyncIterator.next() is cancelled instead of returning nil. The user defined generic Failure type of NIOThrowingAsyncSequenceProducer is also deprecated and must now always be any Swift.Error. (#2399, #2401)

SemVer Patch

• Mildly rework the NIOLock storage (#2395)

Other Changes

• Update links in NIO docs index (#2396)
• Clean up and regression check the docs. (#2400)

SwiftNIO 2.49.0

SemVer Minor

• Mark EventLoop.syncShutdownGracefully and EventLoopGroup.syncShutdownGracefully noasync (#2381)
• Add a pooled recv buffer allocator (#2362)
• NIOAsyncWriter: Provide a fast path for single element writes (#2365)
• Provide OnLoopSendable: Sendable containers that bind a value to a specific EventLoop (#2370)
• Add support for UDP_SEGMENT (#2372)
• Add support for UDP_GRO (#2385)

SemVer Patch

• Pool buffers for ivecs and storage refs in the event loop. (#2358, patch credit to @ser-0xff)
• Fix memory binding. (#2376, patch credit to @ser-0xff)
• Fix an upcoming compiler warning on implicit raw pointer casts. (#2377, patch credit to @atrick)
• Buffer pool for message headers and addresses. (#2378, patch credit to @ser-0xff)
• Remove unused array (#2361)
• Make PooledBuffer safer. (#2363)
• Fix swift-nio iOS builds. (#2369)
• Don't retain a task when all we want is a time (#2373)
• Make our time types transparent (#2374)
• Allow UDP GRO tests to fail in some circumstances (#2387)

Other Changes

• TCP channel throughput benchmark. (#2367, patch credit to @ser-0xff)
• Add UDP performance tests (#2360)
• Clarify on EL semantics (#2366)
• Add availability requirements to TCPThroughputBenchmark (#2368)
• Not Holding OnToRunClosure() test updates (#2375)
• Remove redundant availability guards (#2379)
• Lower the max segment count in tests (#2382)
• Rebuild the channel when retrying testWriteBufferAtGSOSegmentCountLimit (#2383)
• Rework the NIOAsyncSequenceProducer tests to rely less on timings (#2386)
• Work around the SwiftPM layout change. (#2389)
• Always populate utsname (#2391)

SwiftNIO 2.48.0

SemVer Minor

• Special case EventLoopPromise.succeed() when Value is Void (#2311, patch credit to @mob-connection)

SemVer Patch

• Tail allocate mutex and a generic value using ManagedBuffer (#2349, patch credit to @asdf-bro)

Other Changes

• Add Swift 5.8 CI and update nightly CI to Ubuntu 22.04 (#2350)
• Lift alloc counter Package.swift to 5.1 and add platforms (#2352)
• Point docs to Swift Package Index (#2353)
• Fix flaky testTaskCancel_whenStreaming_andNotSuspended (#2355)