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| author | Eli Bendersky <eliben@gmail.com> | 2013-03-09 13:54:00 (GMT) |
|---|---|---|
| committer | Eli Bendersky <eliben@gmail.com> | 2013-03-09 13:54:00 (GMT) |
| commit | 490cf4472ec1d5ce70f7e4817b47c392f22d579c (patch) | |
| tree | 856f1d70ce7591ce83dbe38b0c005afde14d1416 /Doc/library | |
| parent | 9cbcc2f1c05bbb5e58b9219d0006b80b408c28f1 (diff) | |
| download | cpython-490cf4472ec1d5ce70f7e4817b47c392f22d579c.zip cpython-490cf4472ec1d5ce70f7e4817b47c392f22d579c.tar.gz cpython-490cf4472ec1d5ce70f7e4817b47c392f22d579c.tar.bz2 | |
Add warning in ctypes documentation for #16575 and #16576
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/ctypes.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst index 486c963..6f093fe 100644 --- a/Doc/library/ctypes.rst +++ b/Doc/library/ctypes.rst @@ -603,6 +603,13 @@ for debugging because they can provide useful information:: .. _ctypes-structureunion-alignment-byte-order: +.. warning:: + + :mod:`ctypes` does not support passing unions or structures with bit-fields + to functions by value. While this may work on 32-bit x86, it's not + guaranteed by the library to work in the general case. Unions and + structures with bit-fields should always be passed to functions by pointer. + Structure/union alignment and byte order ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |