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See discussion: #145534 (comment)

cc: @jeremyd2019

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rustbot commented Aug 20, 2025

r? @ibraheemdev

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Aug 20, 2025
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jeremyd2019 commented Aug 20, 2025

OK, I was going to say, Cygwin supports several file locking APIs to choose from: flock, lockf, fcntl F_SETLKW and F_LCK_MANDATORY... Posix OFD locks are in process of being added for 3.7.0 I think

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Well I chose the minimal change in this PR. Seems that libstd is using flock for all unix targets, and cygwin just supports it. Is there some concerns with flock in cygwin?

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jeremyd2019 commented Aug 20, 2025

no I was just confused that it said that try_lock was not supported when Cygwin implements so many locking apis 😁

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@bors r+ rollup

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bors commented Aug 21, 2025

📌 Commit cadb56d has been approved by joshtriplett

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Aug 21, 2025
jhpratt added a commit to jhpratt/rust that referenced this pull request Aug 21, 2025
…triplett

Add flock support for cygwin

See discussion: rust-lang#145534 (comment)

cc: `@jeremyd2019`
bors added a commit that referenced this pull request Aug 21, 2025
Rollup of 19 pull requests

Successful merges:

 - #143383 (stabilize `const_array_each_ref`)
 - #144758 ([Doc] Add links to the various collections)
 - #144915 (Defer tail call ret ty equality to check_tail_calls)
 - #145256 (Add new `--test-codegen-backend` bootstrap option)
 - #145297 (fix(debuginfo): handle false positives in overflow check)
 - #145390 (Shorten some dependency chains in the compiler)
 - #145415 (std_detect: RISC-V: implement implication to "C")
 - #145525 (stdlib: Replace typedef -> type alias in doc comment)
 - #145590 (Prevent impossible combinations in `ast::ModKind`.)
 - #145593 (UnsafePinned::raw_get: sync signature with get)
 - #145621 (Fix some doc typos)
 - #145627 (Unconditionally-const supertraits are considered not dyn compatible)
 - #145642 (Do not use effective_visibilities query for Adt types of a local trait while proving a where-clause)
 - #145650 (Fix JS search scripts path)
 - #145654 (Download CI GCC into the correct directory)
 - #145662 (Enforce correct number of arguments for `"x86-interrupt"` functions)
 - #145673 (Add flock support for cygwin)
 - #145674 (Enable triagebot `[review-changes-since]` feature)
 - #145678 (Fix typo in docstring)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 018568f into rust-lang:master Aug 21, 2025
10 checks passed
@rustbot rustbot added this to the 1.91.0 milestone Aug 21, 2025
rust-timer added a commit that referenced this pull request Aug 21, 2025
Rollup merge of #145673 - Berrysoft:cygwin-fix-flock, r=joshtriplett

Add flock support for cygwin

See discussion: #145534 (comment)

cc: ``@jeremyd2019``
@Berrysoft Berrysoft deleted the cygwin-fix-flock branch August 21, 2025 14:29
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6 participants