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Title: Implement Windows SemLock in _multiprocessing module by youknowone · Pull Request #7199 · RustPython/RustPython · GitHub

Open Graph Title: Implement Windows SemLock in _multiprocessing module by youknowone · Pull Request #7199 · RustPython/RustPython

X Title: Implement Windows SemLock in _multiprocessing module by youknowone · Pull Request #7199 · RustPython/RustPython

Description: Summary by CodeRabbit New Features Windows semaphore synchronization: new semaphore and handle types with ownership, recursive-locking, lifecycle hooks, and context-manager support. Windows-specific attributes and accessors exposed for semaphore objects. Bug Fixes More consistent exception reduction on Windows (winerror and filename ordering/presence). Socket receive now returns trimmed byte buffers matching actual bytes read.

Open Graph Description: Summary by CodeRabbit New Features Windows semaphore synchronization: new semaphore and handle types with ownership, recursive-locking, lifecycle hooks, and context-manager support. Windows-spec...

X Description: Summary by CodeRabbit New Features Windows semaphore synchronization: new semaphore and handle types with ownership, recursive-locking, lifecycle hooks, and context-manager support. Windows-spec...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7199

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e88eaf0 Implement Windows SemLock in _multiprocessing module youknowone Feb 17, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/e88eaf0b4373ac575a8dd13d22c4d8ef7adbbc37
2903370 Fix _multiprocessing recv to return bytes and improve SemLock reliabi… youknowone Feb 22, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/29033704e33786161c739b73da949488520c2ba9
4dd6042 Include winerror in OSError.__reduce__ on Windows youknowone Feb 22, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/4dd6042c1cb3ec30b9fde83d94a9cffb3f36023f
c40092b Remove expectedFailure for tests now passing with Windows SemLock youknowone Feb 22, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/c40092bcce84637bf057d5559d17e9b66adc1948
9649be1 Fix OSError.__reduce__ to preserve winerror when filename is None youknowone Feb 22, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/9649be17d99a02fc6313c269119dae803d2a9828
c7d65b9 Validate maxvalue > 0 in SemLock and document winerror __reduce__ div… youknowone Feb 23, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/c7d65b9a5ba9e3bef69fe47ba2c8008fc1203fff
7b8bce4 Reject embedded null characters in mmap tagname and _winapi file mapp… youknowone Feb 23, 2026 https://github.com/RustPython/RustPython/pull/7199/commits/7b8bce418dde9100ac4ece16d09c495372fcd7ef
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