Erlend E. Aasland <erlend.aasl...@innova.no> added the comment:
Some info regarding _multiprocessing: Modules/_multiprocessing/semaphore.c is currently conditionally included in setup.py (HAVE_SEM_OPEN && !POSIX_SEMAPHORES_NOT_ENABLED), but always included in Modules/Setup. Here's some historical bpo's (more or less) relevant to Modules/_multiprocessing/semaphore.c: - bpo-7272 - bpo-5545 - bpo-3770 Commit 99c48a8d315fe55c8e1e8eac2e01cd930cb89686 message says: Author: Hye-Shik Chang <hyes...@gmail.com> Date: Sat Jun 28 01:04:31 2008 +0000 Give information for compililation of _multiprocessing.SemLock on FreeBSD: FreeBSD's P1003.1b semaphore support is highly experimental and it's disabled by default. Even if a user loads the experimental kernel module manually, _multiprocessing doesn't work correctly due to several known incompatibilities around sem_unlink and sem_getvalue, yet. Excerpt from the FreeBSD 9.0 release notes[^1], released four years later (2012-01-12): kern.features.sysv_sem. System V semaphores support kern.features.p1003_1b_mqueue. POSIX P1003.1B message queues support kern.features.p1003_1b_semaphores. POSIX P1003.1B semaphores support kern.features.kposix_priority_scheduling POSIX P1003.1B real-time extensions I haven't checked OpenBSD or NetBSD yet. Other relevant commits: - c4920e86ef7511b4e858028e870b1811437a71d0 - 40a6164afa79f6b97e7e40e0f35f6081fde437c2 [^1]: https://www.freebsd.org/releases/9.0R/relnotes-detailed/ ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45847> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com