 qmuntal
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5e63aa5e0f
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windows: export O_FILE_FLAG_* to be used in os.OpenFile on windows
These file flags are supported by os.OpenFile since CL 699415.
Closes golang/go#73676
Change-Id: Iaf846c9cb98c1458bbc30d05ad8a331ef1f332df
Reviewed-on: https://go-review.googlesource.com/c/sys/+/700975
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
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2025-09-26 11:36:48 -07:00 |
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qmuntal
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3d9a6b8079
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windows: add WSADuplicateSocket
WSADuplicateSocket is useful to pass sockets between processes on
Windows.
For golang/go#10350.
Change-Id: I6563184fe4d4477d402a6af81b254bd8aa992d2e
Reviewed-on: https://go-review.googlesource.com/c/sys/+/668215
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Carlos Amedee <carlos@golang.org>
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2025-05-02 09:05:10 -07:00 |
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Quim Muntal
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e0753d4694
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Revert "windows/mkwinsyscall: use syscall.SyscallN instead of syscall.Syscall{6,9,12,15}"
This reverts CL 614082.
Reason for revert: syscall.SyscallN allocates more than its syscall.SyscallX counterparts, producing perf-related test failures across the board.
Updates #70197
Change-Id: I51107d909fcdbef4e65ee3f84932b2a0e7804f1b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/625375
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2024-11-05 15:28:52 +00:00 |
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qmuntal
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d045236a8d
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windows: implement Ftruncate using a single syscall on Windows
Ftruncate can be implemented on Windows using a single syscall. This
makes the implementation more efficient and less prone to races when
used in combination with other Seek calls.
Note that this is the x/sys counterpart for CL 618835.
Change-Id: Ie9be356bd953ccce85c0dd87a5dcc6ccf4fec464
Reviewed-on: https://go-review.googlesource.com/c/sys/+/621935
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
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2024-10-28 14:49:53 +00:00 |
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qmuntal
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7143f4a4e1
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windows: manually initialize NewNTUnicodeString
The `RtlInitUnicodeString` syscall can be avoided by manually
initializing the `NTUnicodeString`.
The process is described in [WdmlibRtlInitUnicodeStringEx](https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdmsec/nf-wdmsec-wdmlibrtlinitunicodestringex).
The less syscalls, the better. It also makes the function faster:
```
goos: windows
goarch: amd64
pkg: golang.org/x/sys/windows
cpu: Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
NewNTUnicodeString-12 181.05n ± 15% 96.32n ± 11% -46.80% (p=0.000 n=10)
```
Change-Id: Iaf079acdcc2024cdca6b6b649a711f6be99c5b87
Reviewed-on: https://go-review.googlesource.com/c/sys/+/618175
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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2024-10-07 19:17:02 +00:00 |
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