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Lysandros Nikolaou
456727df50
Implemented initial support for free-threaded Python by adding new tests
and reworking the test harness and GitHub Actions to include Python 3.13t
and Python 3.14t in test runs. Two concurrency issues have been identified
and fixed: the first involves initialization of the ``.c`` collection on a
``FromClause``, a continuation of 🎫`12302`, where an optional mutex
under free-threading is added; the second involves synchronization of the
pool "first_connect" event, which first received thread synchronization in
🎫`2964`, however under free-threading the creation of the mutex
itself runs under the same free-threading mutex. Initial pull request and
test suite courtesy Lysandros Nikolaou.
py313t: yes
py314t: yes
Fixes: #12881
Closes: #12882
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/12882
Pull-request-sha: 53d65d96b9
Co-authored-by: Mike Bayer <mike_mp@zzzcomputng.com>
Change-Id: I2e4f2e9ac974ab6382cb0520cc446b396d9680a6