Enable SIMD rolling checksums on x86#1928
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Add CompletionPump: a shared completion-port driver that owns a worker thread looping on GetQueuedCompletionStatusEx and dispatches each completion entry to a per-operation handler keyed by the OVERLAPPED pointer. This is the Windows analogue of an io_uring CQE drain and is the foundational building block for the upcoming batched-write API (#1898), the concurrent file/socket paths (#1928-#1932), and the IOCP benchmark harness (#1899). Existing IocpReader/IocpWriter create a private port and inline-call GetQueuedCompletionStatus per operation, so the pump introduces a process-wide proactor without disturbing those single-op paths. Cross-platform: real implementation lives behind #[cfg(all(target_os = "windows", feature = "iocp"))]; non-Windows targets get an Unsupported-returning stub so the crate still compiles on Linux and macOS. All unsafe stays inside fast_io per the workspace unsafe-code policy.
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Adds an IOCP-backed async socket reader/writer that mirrors the io_uring socket surface and dispatches completions through the shared CompletionPump from #1897. Each WSARecv/WSASend issues an OVERLAPPED operation; synchronous completions and WSA_IO_PENDING paths both wait on a oneshot handler registered with the pump, so file I/O and socket I/O share a single drain thread. Mirrors upstream rsync's socket I/O semantics: - recv treats graceful peer close (WSAEDISCON, WSAESHUTDOWN, WSAENETRESET, WSAECONNRESET, WSAECONNABORTED) and STATUS_END_OF_FILE as Ok(0), matching safe_read breaking on n == 0 (target/interop/upstream-src/rsync-3.4.1/io.c:276). - send maps WSAESHUTDOWN/WSAECONNRESET/WSAECONNABORTED to BrokenPipe and returns short counts so the caller's loop re-issues, matching safe_write's partial-write retry (io.c:316-336). Files: - crates/fast_io/src/iocp/socket.rs (new): IocpSocketReader, IocpSocketWriter, SharedPump alias, six tests covering localhost TCP roundtrip, partial 64KB send accounting, peer-shutdown EOF, empty-buffer fast paths, and completion-key override. - crates/fast_io/src/iocp/mod.rs: pub mod socket; (single line) - crates/fast_io/src/iocp_stub.rs: matching stub module so the workspace cross-compiles on Linux and macOS, all methods returning io::ErrorKind::Unsupported. - crates/fast_io/Cargo.toml: add Win32_Networking_WinSock to the windows-sys feature list for WSARecv/WSASend bindings. Cross-platform compile preserved: the real implementation is gated behind cfg(all(target_os = "windows", feature = "iocp")) at the fast_io::iocp module level; non-Windows builds fall through to the stub.
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Adds an IOCP-backed async socket reader/writer that mirrors the io_uring socket surface and dispatches completions through the shared CompletionPump from #1897. Each WSARecv/WSASend issues an OVERLAPPED operation; synchronous completions and WSA_IO_PENDING paths both wait on a oneshot handler registered with the pump, so file I/O and socket I/O share a single drain thread. Mirrors upstream rsync's socket I/O semantics: - recv treats graceful peer close (WSAEDISCON, WSAESHUTDOWN, WSAENETRESET, WSAECONNRESET, WSAECONNABORTED) and STATUS_END_OF_FILE as Ok(0), matching safe_read breaking on n == 0 (target/interop/upstream-src/rsync-3.4.1/io.c:276). - send maps WSAESHUTDOWN/WSAECONNRESET/WSAECONNABORTED to BrokenPipe and returns short counts so the caller's loop re-issues, matching safe_write's partial-write retry (io.c:316-336). Files: - crates/fast_io/src/iocp/socket.rs (new): IocpSocketReader, IocpSocketWriter, SharedPump alias, six tests covering localhost TCP roundtrip, partial 64KB send accounting, peer-shutdown EOF, empty-buffer fast paths, and completion-key override. - crates/fast_io/src/iocp/mod.rs: pub mod socket; (single line) - crates/fast_io/src/iocp_stub.rs: matching stub module so the workspace cross-compiles on Linux and macOS, all methods returning io::ErrorKind::Unsupported. - crates/fast_io/Cargo.toml: add Win32_Networking_WinSock to the windows-sys feature list for WSARecv/WSASend bindings. Cross-platform compile preserved: the real implementation is gated behind cfg(all(target_os = "windows", feature = "iocp")) at the fast_io::iocp module level; non-Windows builds fall through to the stub.
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* feat(fast_io): IOCP socket I/O via WSARecv/WSASend (#1928) Adds an IOCP-backed async socket reader/writer that mirrors the io_uring socket surface and dispatches completions through the shared CompletionPump from #1897. Each WSARecv/WSASend issues an OVERLAPPED operation; synchronous completions and WSA_IO_PENDING paths both wait on a oneshot handler registered with the pump, so file I/O and socket I/O share a single drain thread. Mirrors upstream rsync's socket I/O semantics: - recv treats graceful peer close (WSAEDISCON, WSAESHUTDOWN, WSAENETRESET, WSAECONNRESET, WSAECONNABORTED) and STATUS_END_OF_FILE as Ok(0), matching safe_read breaking on n == 0 (target/interop/upstream-src/rsync-3.4.1/io.c:276). - send maps WSAESHUTDOWN/WSAECONNRESET/WSAECONNABORTED to BrokenPipe and returns short counts so the caller's loop re-issues, matching safe_write's partial-write retry (io.c:316-336). Files: - crates/fast_io/src/iocp/socket.rs (new): IocpSocketReader, IocpSocketWriter, SharedPump alias, six tests covering localhost TCP roundtrip, partial 64KB send accounting, peer-shutdown EOF, empty-buffer fast paths, and completion-key override. - crates/fast_io/src/iocp/mod.rs: pub mod socket; (single line) - crates/fast_io/src/iocp_stub.rs: matching stub module so the workspace cross-compiles on Linux and macOS, all methods returning io::ErrorKind::Unsupported. - crates/fast_io/Cargo.toml: add Win32_Networking_WinSock to the windows-sys feature list for WSARecv/WSASend bindings. Cross-platform compile preserved: the real implementation is gated behind cfg(all(target_os = "windows", feature = "iocp")) at the fast_io::iocp module level; non-Windows builds fall through to the stub. * style(transport): cargo fmt
oferchen
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May 5, 2026
Add CompletionPump: a shared completion-port driver that owns a worker thread looping on GetQueuedCompletionStatusEx and dispatches each completion entry to a per-operation handler keyed by the OVERLAPPED pointer. This is the Windows analogue of an io_uring CQE drain and is the foundational building block for the upcoming batched-write API (#1898), the concurrent file/socket paths (#1928-#1932), and the IOCP benchmark harness (#1899). Existing IocpReader/IocpWriter create a private port and inline-call GetQueuedCompletionStatus per operation, so the pump introduces a process-wide proactor without disturbing those single-op paths. Cross-platform: real implementation lives behind #[cfg(all(target_os = "windows", feature = "iocp"))]; non-Windows targets get an Unsupported-returning stub so the crate still compiles on Linux and macOS. All unsafe stays inside fast_io per the workspace unsafe-code policy.
oferchen
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May 5, 2026
* feat(fast_io): IOCP socket I/O via WSARecv/WSASend (#1928) Adds an IOCP-backed async socket reader/writer that mirrors the io_uring socket surface and dispatches completions through the shared CompletionPump from #1897. Each WSARecv/WSASend issues an OVERLAPPED operation; synchronous completions and WSA_IO_PENDING paths both wait on a oneshot handler registered with the pump, so file I/O and socket I/O share a single drain thread. Mirrors upstream rsync's socket I/O semantics: - recv treats graceful peer close (WSAEDISCON, WSAESHUTDOWN, WSAENETRESET, WSAECONNRESET, WSAECONNABORTED) and STATUS_END_OF_FILE as Ok(0), matching safe_read breaking on n == 0 (target/interop/upstream-src/rsync-3.4.1/io.c:276). - send maps WSAESHUTDOWN/WSAECONNRESET/WSAECONNABORTED to BrokenPipe and returns short counts so the caller's loop re-issues, matching safe_write's partial-write retry (io.c:316-336). Files: - crates/fast_io/src/iocp/socket.rs (new): IocpSocketReader, IocpSocketWriter, SharedPump alias, six tests covering localhost TCP roundtrip, partial 64KB send accounting, peer-shutdown EOF, empty-buffer fast paths, and completion-key override. - crates/fast_io/src/iocp/mod.rs: pub mod socket; (single line) - crates/fast_io/src/iocp_stub.rs: matching stub module so the workspace cross-compiles on Linux and macOS, all methods returning io::ErrorKind::Unsupported. - crates/fast_io/Cargo.toml: add Win32_Networking_WinSock to the windows-sys feature list for WSARecv/WSASend bindings. Cross-platform compile preserved: the real implementation is gated behind cfg(all(target_os = "windows", feature = "iocp")) at the fast_io::iocp module level; non-Windows builds fall through to the stub. * style(transport): cargo fmt
This was referenced May 5, 2026
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Summary
Testing
https://chatgpt.com/codex/tasks/task_e_6909a2caa6a08323acf3149f63e0f1f7