2bc89a5198
std.Io.Threaded: make parking_futex lock-free
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And therefore no longer depend on a mutex API.
The idea here is to rely on cache line operations being very fast.
Buckets span exactly one cache line each, storing only waiter pointers.
Additions and removals do linear weak cmpxchg scan over the cache line,
repeating until sucess.
If there are more parked threads with bucket hash collisions than fits
into a cache line then wait() degrades into a spin lock.
2026-02-02 18:55:31 -08:00
e9eadee006
Merge pull request 'std.Io.Threaded: sever dependency on std.Thread Mutex and Condition' ( #31096 ) from severance into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31096
2026-02-03 03:30:42 +01:00
5312063138
std.Io.Threaded: work around parking futex bug
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This commit should be reverted - it's testing a hypothesis that Windows
is deadlocking due to bug in the implementation of
std.Io.Threaded.parking_futex
2026-02-02 14:25:27 -08:00
eb74e23e7b
std.Io.Threaded: sever dependency on std.Thread Mutex and Condition
2026-02-02 14:18:04 -08:00
c2d4806d65
Merge pull request 'std.Thread: remove redundant sync APIs ResetEvent and WaitGroup' ( #31088 ) from sync-cleanup-smaller into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31088
2026-02-02 23:14:05 +01:00
1cd3af43fd
std.Io.Threaded: implement CPU-based clocks on Windows ( #31093 )
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31093
Co-authored-by: Krzysztof Antonowski <krzysztofantonowski@proton.me >
Co-committed-by: Krzysztof Antonowski <krzysztofantonowski@proton.me >
2026-02-02 22:19:19 +01:00
b71e593df4
Merge pull request 'Add process.Child.Cwd, use it for cwd and remove cwd_dir field' ( #31090 ) from squeek502/zig:unify-child-cwd into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31090
Reviewed-by: Andrew Kelley <andrew@ziglang.org >
2026-02-02 19:56:40 +01:00
633eb247ab
std.Io.Event: fix single-threaded implementation
2026-02-02 10:44:50 -08:00
05346e123b
Add process.Child.Cwd, use it for cwd and remove cwd_dir field
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The user must now explicitly choose between inheriting the current CWD, passing a path for the CWD, or passing a Dir for the CWD.
2026-02-02 01:41:35 -08:00
83abd73801
Windows: Support directory handle for cwd instead of string for Child.process
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This implementation is a bit of a hacky workaround, as we use a ntdll
API to grab the full path of the directory handle. As far as I can tell
this might be the only solution to the problem, as
kernel32.CreateProcessW takes a directory path as a string only.
I might be wrong though as haven't researched the problem thoroughly.
2026-02-02 01:21:11 -08:00
b191e50be5
std.Thread: remove ResetEvent and WaitGroup
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* std.Thread.ResetEvent -> Io.Event
* std.Thread.WaitGroup -> Io.Group
2026-02-02 00:09:48 -08:00
60ac4e78eb
std.Io.Mutex: fix tryLock
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`@cmpxchgWeak` can return the expected value sometimes.
2026-02-02 00:09:48 -08:00
aacf8ce03d
Use MultiReader in zig std
2026-02-01 22:22:47 -05:00
37d14a4f3b
Merge pull request 'libzigc: cbrt, cbrtf' ( #31078 ) from jeffective/zig:jeff/libzigc-cbrt into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31078
Reviewed-by: Andrew Kelley <andrew@ziglang.org >
2026-02-01 20:03:57 +01:00
171459f678
Merge pull request 'libzigc: round, roundf' ( #31075 ) from jeffective/zig:jeff/libzigc-round into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31075
Reviewed-by: Andrew Kelley <andrew@ziglang.org >
2026-02-01 20:02:06 +01:00
59073484ba
std.Io: add ioctl / DeviceIoControlFile API
2026-02-01 01:08:01 -08:00
4aadb5e4a5
libzigc: cbrtf
2026-02-01 00:09:54 -08:00
0aae9768aa
libzigc: cbrt
2026-02-01 00:09:45 -08:00
e5454ff780
Merge pull request 'std.Io: move fileWriteStreaming to Operation' ( #31065 ) from more-poll into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31065
2026-02-01 07:56:09 +01:00
cc442d24ab
std.Io: move fileWriteStreaming to Operation
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This serves as an example to contributors of how to move VTable
functions to becoming an Operation, thereby enabling Batch API and
timeouts.
2026-01-31 22:53:28 -08:00
9bd648bd40
std.Io.Operation: support non-fallible results
2026-01-31 22:52:00 -08:00
379d128cba
libzigc: roundf
2026-01-31 18:18:29 -08:00
3abc96a601
std.Io: add test for batchAwaitAsync
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and make it always work for all targets including WASI
This function guarantees no additional failure modes introduced.
2026-02-01 02:49:36 +01:00
69a95571ed
libzigc: round
2026-01-31 17:26:17 -08:00
e60ba21114
libzigc: roundl
2026-02-01 00:59:35 +01:00
2b19134c86
Merge pull request 'std.Io: introduce batching and operations API, satisfying the "poll" use case' ( #30743 ) from poll into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/30743
2026-01-31 12:07:31 +01:00
5ccc2ea85d
std: IoUring test handles EINTR
2026-01-31 09:36:40 +01:00
da95409f31
Merge pull request 'llvm: handle packed structs in C ABI integer promotion' ( #31062 ) from alexrp/zig:packed-struct-cconv-fix into master
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Reviewed-on: https://codeberg.org/ziglang/zig/pulls/31062
2026-01-31 07:09:19 +01:00
9646801bed
std: fix Preopens compilation error
2026-01-30 22:06:33 -08:00
14e1e5f6d8
std: IoUring test handles EINTR
2026-01-30 22:03:44 -08:00
43866f7439
build.zig: bump max_rss
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encountered error: memory usage peaked at 0.66GB (656060416 bytes),
exceeding the declared upper bound of 0.64GB (639565414 bytes)
2026-01-30 22:03:39 -08:00
b6f4bb91c4
std.Io: add documentation to Batch
2026-01-30 22:03:33 -08:00
25aef0dd87
std.Io.Threaded: rework file reading to observe nonblocking flag
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- batchAwaitAsync does blocking reads with NtReadFile (no APC, no event)
when the nonblocking flag is unset, but still takes advantage of
APCs when nonblocking flag is set.
- batchAwaitConcurrent returns error.ConcurrencyUnavailable when it
encounters a file_read_streaming operation on a file in blocking mode.
- fileReadStreaming avoids pointlessly checking sync cancelation status
when nonblocking flag is set, uses an APC with a done flag, and waits
on that value to change in NtDelayExecution before returning.
- fix incorrect use of NtCancelIoFile (ntdll function prototype was
wrong, leading to misuse)
2026-01-30 22:03:14 -08:00
39a6d5d1c5
std.Io.File: add non-blocking flag
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On Windows, we need to know ahead of time whether a file was opened in
synchronous mode or asynchronous mode. There may be advantages to
tracking this state for POSIX operating systems as well.
2026-01-30 22:03:14 -08:00
62c97b745d
std.Io.Threaded: stop checking bytes read with END_OF_FILE
2026-01-30 22:03:14 -08:00
2674acdb77
Io.Batch: implement alternate API
2026-01-30 22:03:14 -08:00
a520355e4c
std.process: simplify RunError set
2026-01-30 22:03:14 -08:00
a41ee5994d
std.Build.Step: evalZigProcess handles EndOfStream
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and a happy little info log when the process needs to be restarted
2026-01-30 22:03:14 -08:00
866ee4f1c5
std.Io.Threaded: handle TIMEOUT from NtDelayExceution
2026-01-30 22:03:14 -08:00
f8828e543a
std.Build: fully upgrade Step.Run to std.Io timing (and fix a typo)
2026-01-30 22:03:14 -08:00
c2679feaaa
std.Io.Threaded: fix ntdll timeouts on Windows
2026-01-30 22:03:14 -08:00
8f8aa8346a
std.Io.Threaded: ntReadFileResult handles EOF + bytes available
2026-01-30 22:03:14 -08:00
4dd7fe90a2
std.Io.Threaded: compress ntReadFile logic
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Just use the ntstatus field rather than an additional enum
2026-01-30 22:03:14 -08:00
3320e6a1ae
std.Io.Threaded.batchWait better fix for any_done
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It is legal to call batchWait with already completed operations in the
ring. In such case, we need to avoid waiting in the syscall. The
any_done flag was a poor way of tracking state we already have: whether
the completion queue is empty.
This problem affects the posix poll implementation as well.
Thanks again to jacobly for finding the problem.
2026-01-30 22:03:14 -08:00
d770e14e00
std.Io.Threaded.batchWaitWindows: eager result sets any_done true
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Thanks jacobly for finding the bug
2026-01-30 22:03:14 -08:00
7a13d57916
std.Io.Threaded: add missing check for pending status in batchCancel
2026-01-30 22:03:14 -08:00
687123a85e
std.process.run: use Io.File.MultiReader
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and delete the special-cased function
2026-01-30 22:03:14 -08:00
b2816f2698
build.zig: only-c implies no-lib
2026-01-30 22:03:14 -08:00
6a1fd3c69d
std.Io.File.MultiReader: make checkAnyError exclude EndOfStream
2026-01-30 22:03:14 -08:00
8a80b54640
std: remove error.BrokenPipe from file reads, add error.EndOfStream
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and make reading file streaming allowed to return 0 byte reads.
According to Microsoft documentation, on Windows it is possible to get
0-byte reads from pipes when 0-byte writes are made.
2026-01-30 22:03:14 -08:00
Andrew Kelley