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| author | Matthias Görgens <matthias.goergens@gmail.com> | 2024-05-29 10:02:53 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-05-29 10:02:53 (GMT) |
| commit | 18c1a8d3a81bf8d287a06f2985bbf65c9a9b9794 (patch) | |
| tree | 6d33a4e84521f7a912484cc9e1a51a05ab66528f /Doc/whatsnew | |
| parent | c1e9647107c854439a9864b6ec4f6784aeb94ed5 (diff) | |
| download | cpython-18c1a8d3a81bf8d287a06f2985bbf65c9a9b9794.zip cpython-18c1a8d3a81bf8d287a06f2985bbf65c9a9b9794.tar.gz cpython-18c1a8d3a81bf8d287a06f2985bbf65c9a9b9794.tar.bz2 | |
gh-97588: Align ctypes struct layout to GCC/MSVC (GH-97702)
Structure layout, and especially bitfields, sometimes resulted in clearly
wrong behaviour like overlapping fields. This fixes
Co-authored-by: Gregory P. Smith <gps@python.org>
Co-authored-by: Petr Viktorin <encukou@gmail.com>
Diffstat (limited to 'Doc/whatsnew')
| -rw-r--r-- | Doc/whatsnew/3.13.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst index 7edfdd4..2b1b5fd 100644 --- a/Doc/whatsnew/3.13.rst +++ b/Doc/whatsnew/3.13.rst @@ -656,6 +656,18 @@ copy any user classes which define the :meth:`!__replace__` method. (Contributed by Serhiy Storchaka in :gh:`108751`.) +ctypes +------ + +* The layout of :ref:`bit fields <ctypes-bit-fields-in-structures-unions>` in + :class:`~ctypes.Structure` and :class:`~ctypes.Union` was improved to better + match platform defaults (GCC/Clang or MSC). In particular, fields no longer + overlap. + (Contributed by Matthias Görgens in :gh:`97702`.) +* A :attr:`ctypes.Structure._layout_` class attribute can be set + to help match a non-default ABI. + (Contributed by Petr Viktorin in :gh:`97702`.) + dbm --- |